CYRUSTEK ES269 User manual

Ver 1.2 1 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Features
⚫6000counts LCD display
⚫3V DC power supply
⚫Conversion rate: 3 times/s (voltage mode)
⚫V,A, C, R, Diode, Cont. automatically
detection and measurement (Scan mode).
(Taiwan patent no.:334931)
(China patent no.:ZL 2007 1 0106703.2)
⚫Combo keys:
SELKey: change measuring mode or power
on/off
BKLight: back light or flash
EF: non-contact electric field detection.
MMX: maximum or minimum
Hold: hold or delay hold
Range: manual range
⚫Voltage measurement (ACV/DCV):
500.0mV-1000V (scan mode)
0.000-1000V (Non-scanning)
⚫Current measurement (ACA/DCA):
Multi-meter mode,
In AC/DC detecting mode.
0.00mA-600.0mA (DCA@mAin)
0.000A-20.00A (DCA@Ain)
6.00mA-600.0mA (ACA@mAin)
0.6A-20.00A (ACA@Ain)
In Non-AC/DC detecting mode
0.00mA-600.0mA (DCA@mAin)
0.000A-20.00A (DCA@Ain)
0.00mA-600.0mA (ACA@mAin)
0.00A-20.00A (ACA@Ain)
Clamp meter mode, only for ACA
6.00A-600.0A (scan mode)
0.00A-600.0A (Non-scanning)
⚫Resistance measurement:
0.0-6.000MΩ(scan mode, including continuity)
0.0-60.00 MΩ (Non-scanning)
⚫Capacitance measurement:
0.000nF-600.0uF (Non-scanning)
0.200nF-60.00mF (auto scanning)
(Taiwan patent no.:323347, 453443)
(China patent no.:ZL 200710106702.8)
⚫Continuity test: 30ohm/50ohm selectable.
⚫Diode test
⚫VAHz measurement: 5.00Hz-60.00kHz
(automatically measuring frequency in
ACV/ACA)
⚫Switch to A/mAmeasurement as a probe is
inserted to A/mA slot. (Non-clamp model)
⚫Non-contact electric field detection
⚫High voltage (> 30V) indication.
⚫Voltage mode overflow selection
(600V/1000V)
⚫Band-gap reference voltage output
⚫Auto power off (10min. or 20min.) &
re-power on
⚫Sleep state indicative signal output
⚫On-chip buzzer driver
⚫Low battery detection
⚫Built-in automatic calibration
⚫Serial data output (RS232 format)
General description
ES269 is an integrated ADC with 6,000 counts
LCD display driver. It could support fully
automatic DMM function measurement. Voltage,
current, resistance (including continuity),
capacitance or diode measurements are allowed
by fully automatic detection. A non-contact
electric field detector (EF function) is built-in for
ac voltage measurement also. Other features
including data hold, peak and back light function
are available. For power saving, an auto power
off & re-power on scheme are built in. A sleep
output is the indication of entering auto power
off mode.

Ver 1.2 2 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Application
⚫Smart digital multi-meter
⚫Smart clamp meter Content
FEATURES..................................................................................................................................................1
GENERAL DESCRIPTION.............................................................................................................................1
APPLICATION.............................................................................................................................................2
PIN ASSIGNMENT......................................................................................................................................4
PIN DESCRIPTION ......................................................................................................................................4
ABSOLUTE MAXIMUM RATINGS................................................................................................................6
ELECTRICAL CHARACTERISTICS .................................................................................................................7
FUNCTIONAL DESCRIPTION.......................................................................................................................8
Operation Modes ...........................................................................................................................8
Voltage Measurement .......................................................................................................................8
Current Measurement .......................................................................................................................9
VAHz function ..................................................................................................................................10
Resistance Measurement.................................................................................................................10
Continuity test .................................................................................................................................11
Diode Measurement........................................................................................................................11
Capacitance Measurement..............................................................................................................12
Electrical field detection test ...........................................................................................................13
Auto power off mode (APO) ............................................................................................................13
Hazardous Voltage Indication ..........................................................................................................14
Low Battery Voltage Detection ........................................................................................................15
Push Function ..................................................................................................................................16
Range key function. .........................................................................................................................20
MAX. and MIN. key function............................................................................................................21
Selection pin ....................................................................................................................................22

Ver 1.2 3 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Calibration Scheme..........................................................................................................................23
SERIAL DATA OUTPUT..............................................................................................................................24
MISCELLANEOUS.....................................................................................................................................28
LCD configuration.........................................................................................................................29
LCD Backplane Waveform................................................................................................................30
LCD display on condition..................................................................................................................30
APPLICATION CIRCUIT .............................................................................................................................32
AC to DC circuit.............................................................................................................................35
Package Information ....................................................................................................................36
100 Pin LQFP Package...................................................................................................................36
Dimension Parameters .................................................................................................................36

Ver 1.2 4 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Pin Assignment
VR3
17
AGND
1
VEE
2
CAZ
3
CINT
4
RAZ
5
CREFN
6
CREFP
7
VRH
8
EFin
9
Ain
10
mAin
11
OHMC1
12
OHMC2
13
OR2
14
OR1
15
VR4
16
VR2
18
OVSG
19
VR1
20
OVH
21
OVX
22
CTRL
23
ACVH
24
AVCL
25
BKOUT
38
ALARM
39
BUZOUT
40
BP4
44
SEG24
45
SEG23
46
SEG22
47
SEG21
48
MMXP
35 RGP 34 CAN 33
SEG20
49
SEG19
50
SEG13 56
SEG12 57
ADI
26
ADO
27
SEG11 58
SEG10 59
SEG09 60
SEG08 61
SEG07 62
SEG06 63
SEG05 64
SEG14 55
SEG16 53
SEG15 54
SGND
29
R9K
30
R1K
31
CAP
32
LEDOUT
37
SEG04 65
SEG03 66
SEG02 67
SEG01 68
RSOUT 69
SDAP 70
SCLP 71
OSC2 72
OSC1 73
DET_mA 74
DET_A 75
NC 76 NC 77
EFKEYP 78
AGND 100
HOLDP 81
SELKEYP 80
BKLITP 79
NC 82
DISFLHSELP 84
S600VEFSELP 85
CSHN 86
CSHP 87
CALen 88
OPO_R 89
OPO_Y 90 OPO_G 91
PDRMS 92
CN 93
CP 94
BAT9 95
CLAMPAPOP 83
V- 96 V- 97
SLEEP
36
V+ 98 V+ 99
TEST5
28
BP1
41
BP2
42
BP3
43
SEG18 51
SEG17 52
ES269
Pin Description
Pin No
Symbol
Type
Description
1
AGND
P
Analog ground.
2
VEE
P
Analog ground.
3
CAZ
I
Auto-zero capacitor connection.
4
CINT
O
Integrator output. Connect to integral capacitor
5
RAZ
O
Buffer output pin in high-speed mode. Connect to high-speed integral
resistor.
6
CREFN
I/O
Negative connection for reference capacitor.
7
CREFP
I/O
Positive connection for reference capacitor.
8
VRH
O
Output of band-gap voltage reference. Typically –1.2V
9
EFin
I
Electric field input
10
Ain
I
Current measurement input
11
mAin
I
Current (milli ampere) measurement input
12
OHMC1
O
Filter capacitor connection for resistance mode
13
OHMC2
O
Filter capacitor connection for resistance mode
14
OR2
O
Reference resistor connection for 60.00MΩ range
15
OR1
O
Reference resistor connection for 600.0Ω range
16
VR4
O
Voltage measurement ÷1000 attenuated (600.0V/1000V)
17
VR3
O
Voltage measurement ÷100 attenuated (60.00V)
18
VR2
O
Voltage measurement ÷10 attenuated (6.000V)
19
OVSG
O
Sense low voltage for resistance measurement
20
VR1
I
Measurement input.
21
OVH
O
Output connection for resistance/capacitor measurement

Ver 1.2 5 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Pin No
Symbol
Type
Description
22
OVX
I
Input high voltage for resistance/capacitor measurement
23
CTRL
O
Connect to “- (LED Catode)”of OptoMOS-relay.
24
ACVH
I
DC signal high input in ACV/ACAmode. Connect to positive output
of external AC to DC converter.
25
ACVL
I
DC signal low input in ACV/ACA mode. Connect to negative output
of external AC to DC converter.
26
ADI
I
Negative input of internal AC to DC OPAmp.
27
ADO
O
Output of internal AC to DC OPAmp.
28
TEST5
I/O
Buffer output of OVSG
29
SGND
I
Signal Ground.
30
R9K
O
Connect to a precise 9KΩ resister for capacitor measurement.
31
R1K
O
Connect to a precise 1KΩ resister for capacitor measurement.
32
CAP
I/O
Positive auto-zero capacitor connection for capacitor measurement
33
CAN
I/O
Negative auto-zero capacitor connection for capacitor measurement
34
RGP
O
RANGE key. Input a negative pulse of less than 1 second to change the
measurement range.
35
MMXP
O
MAX. and MIN. key. Input a negative pulse of less than 1 seconds to
enter or exit MAX.&MIN function.
36
SLEEP
O
Sleep mode indicator, it asserts low in SLEEP mode.
37
LEDOUT
O
Flash driver.
38
BKOUT
O
Backlight driver.
39
ALARM
O
HV signal detection, short circuit indication and EF indication output.
40
BUZOUT
O
Outputs a 2KHz audio frequency signal for driving piezoelectric
buzzer
41
BP1
O
LCD backplane 1
42
BP2
O
LCD backplane 2
43
BP3
O
LCD backplane 3
44
BP4
O
LCD backplane 4
45-68
SEG24-SEG01
O
LCD segment line 01 –24
69
RSOUT
O
RS232 output
70
SDAP
I/O
Input / Output from to EEPROM 24LC02 data. Open drain output.
71
SCLP
O
Output to EEPROM 24LC02 clock
72
OSC2
I
Crystal oscillator input connection
73
OSC1
O
Crystal oscillator output connection
74
DET_mA
I
Connect to GND to enter mA measurement.
75
DET_A
I
Connect to GND to enter A measurement.
76
NC
-
Not connected
77
NC
-
Not connected
78
EFKEYP
I
Input a less than 1 second negative pulse (GND to V-) to enter EF
function.
79
BKLITP
I
Input a less than 1 second negative pulse (GND to V-) to turn on Back
light.
Input an over 1 second negative pulse (GND to V-) to turn on
Flashlight.
80
SELKEYP
I
Input a less than 1 second negative pulse to switch to manual mode.
Input an over 1 second negative pulse to switch the power on/off.
81
HOLDP
I
Input a less than 1 second negative pulse (GND to V-) to enable
HOLD function.
Input an over 1 second negative pulse (GND to V-) to enable DELAY
HOLD function.
82
NC
-
Floating.
83
CLAMPAPOP
I
The option pin is used to select clamp mode or meter mode, and to
change the automatically power off time.

Ver 1.2 6 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Pin No
Symbol
Type
Description
84
DISFLHSELP
I
The option pin is used to select flashlight and SEL key enable or
disable.
85
S600VEFSELP
I
The option pin is used to select the OL value as 600V or 1000V.
86
CSHN
O
Negative sample & hold capacitor
87
CSHP
O
Positive sample & hold capacitor
88
CALen
I
Pulled to V- to enable calibration scheme.
89
OPO_R
O
LED output driver
90
OPO_Y
O
LED output driver
91
OPO_G
O
LED output driver
92
PDRMS
O
Power control for root mean square circuit (RMS).
93
CN
O
Negative capacitor connection for on-chip DC-DC converter.
94
CP
O
Positive capacitor connection for on-chip DC-DC converter.
95
BAT9
I
Low battery configuration. If 3V battery is used, connect it to AGND.
The default low-battery thres hold voltage is –2.3V. If 9V battery is
used, the low battery enunciator is displayed when the voltage of this
pin is less than VRH (-1.2V)
96
V-
P
Digital negative supply voltage.
97
V-
P
Analog negative supply voltage.
98
V+
O/P
Digital positive supply voltage.
99
V+
O/P
Analog positive supply voltage.
100
AGND
P/G
Digital ground.
Absolute Maximum Ratings
Table 1. Absolute maximum ratings
Characteristic
Rating
Supply Voltage (V- to AGND)
-4V
Analog Input Voltage
V- -0.6 to V+ +0.6
V+
V+ ≥(AGND +0.5V)
AGND/AGND
AGND ≥(V- -0.5V)
Digital Input
V- -0.6 to AGND +0.6
Power Dissipation. Flat Package
500mW
Operating Temperature
-20℃to 70℃
Storage Temperature
-45℃to 125℃

Ver 1.2 7 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Electrical Characteristics
Table 2. Electrical characteristics, TA=25℃, V- = -3V
Parameter
Symbol
Test Condition
Min.
Typ.
Max
Units
Power supply
V-
-3.3
-3.0
-2.5
V
Operating supply current
In Scan AC/DC mode
IDD
Normal operation
—
4.2
—
mA
ISS
In sleep mode
—
13.7
14
µA
Voltage roll-over error
REV
2MΩ input resistor
—
—
±0.1
%F.S1
Voltage nonlinearity
NLV
Best case straight
line
—
—
±0.1
%F.S1
Input Leakage
-10
1
10
PA
Low battery flag voltage
V- to AGND
-2.4
-2.3
-2.2
V
Zero input reading
2MΩ input resistor
-000
000
+000
counts
Peak to peak backplane
drive voltage
-3.5V≤ V ≤-2.2V
3.0
3.15
3.3
V
Counter time base period
fOSC = 4MHZ
—
1
—
sec
Reference voltage and open circuit
voltage for 600Ω measurement
VREF
100KΩ resistor
between VRH and
AGND
-1.33
-1.23
-1.13
V
Open circuit voltage for Ω
measurement (except 600Ω)
ΩMode
-0.98
-0.93
-0.88
V
Open circuit voltage for 600Ω
measurement
Ωand Continuity Mode
V-
V
Internal pull-high to 0V
current
Between V- pin and
HOLDP, SELKEYP,
BKLITP, EFKEYP,
CLAMP, RGP, MMXP.
—
1.2
—
µA
AC frequency response at 6.000V
Range
±1%
—
40-400
—
Hz
±5%
—
400-2000
—
AC input response for scan mode
10
—
50000
Hz
DCV sensitivity (scan mode)
VR1(2MΩinput
impedance)
—
400
—
mV
ACV sensitivity (scan mode)
VR1(2MΩinput
impedance) @50Hz
—
500
—
mVRMS
ACA sensitivity (scan mode)
mAin or Ain input @50Hz
—
60
—
mVRMS
Resistance sensitivity (scan mode)
Parasitic capacitance allowed
in 6.000MΩrange
600.1
—
6.000M
Ω
Continuity sensitivity (scan mode)
0
—
600.0
Ω
DIODE sensitivity (scan mode)
Forward voltage
—
—
0.9
V
Capacitance sensitivity (scan mode)
—
0.2n
600.0μ
F
Reference voltage temperature
coefficient
TCRF
-20℃<TA<70℃
—
75
—
ppm/℃
Capacitance measurement accuracy
6nF –600nF
-1.5
—
1.5
%F.S
-5
—
5
counts
6.0µF ~ 60mF
-2.5
—
2.5
%F.S
counts
1
Full Scale

Ver 1.2 8 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Functional Description
Operation Modes
Voltage Measurement
A voltage divider automatically provides a suitable range in voltage measurement mode. The following
table summarizes the full-scale ranges in each configuration.
In scan mode, ES269 can automatically detect ACV/DCV input signal. The input voltage must exceed
500mVRMS
2
to switch to ACV measurement and 350mV to switch to DCV measurement.
In auto mode, ES269 can automatically switch to appropriate range for measurement.
In manual mode, User can switch range by Range key.
ES269 has an OL display selection feature achieved by configuring a S600VEFSEL pin. If pin
S600VEFSEL is floating or is connected to V+, the DCV and ACV overflow level is 600.0V. If pin
S600VEFSEL is connected to AGND or V-, the DCV and ACV overflow level is 1000.0V. When the
measuring signal reaches the overflow level, OL will be showed on the LCD, and the buzzer will sound
an alarm. The configuration of S600VEFSEL is listed below. See Table 12 for details.
Table 3. Voltage ranges
Configuration
Full Scale Range
Divider Ratio
Resister Connection
VR1
6.000V
1/10
VR2 (220KΩ)
VR2
60.00V
1/100
VR3 (20KΩ)
VR3
600V/1000V
1/1000
VR4 (2KΩ)
2
The threshold is not a consistent value, it depends on the frequency of test signal. 500mVRMS at 50Hz
test condition.

Ver 1.2 9 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Current Measurement
For multi-meter application
Connect CLAMPAPO pin to V- or AGND for multi-meter model. See to Table 13 for details. There are
2 automatic current measurement modes for multi-meter. The following table summarizes the full-scale
range of each mode. When ES269 operates in the current measurement modes for multi-meter, it takes
high input from pin Ain or mAin, low input from pin SGND.
Connecting DET_mA or DET_A pin to AGND to switch automatically to mA or A measurement,
respectively.
In scan mode, both mA/A can automatically detect DCA or ACA. Alternatively, it can switch manually
to DCA or ACA measurement by SELKEY.
In auto mode, ES269 can automatically switch to appropriate range for measurement.
In manual mode, user can switch range by Range key.
Table 4. milli-Ampere ranges for multi-meter
Mode
Full Scale
Input Terminal
Full scale
mAR1
60.00mA
mAin V.S. SGND
60.00mV
mAR2
600.0mA
mAin V.S. SGND
600.0mV
Table 5. Ampere ranges for multi-meter
Mode
Full Scale
Input Terminal
Full scale
AR1
6.000A
Ain V.S. SGND
60.00mV
AR2
20.00A
Ain V.S. SGND
200.0mV
Table 6. The sensitivity value in DC(m)A/AC(m)A auto detecting mode
Sensitivity
Test range
mA
6mA
6.00mA –600.0mA
A
0.6A
0.600A –20.00A
For clamp meter application
Leave the CLAMPAPO pin floating or connected it to V+ for clamp meter model. See to Table 13 for
details. The following table summarizes the full-scale range of each mode. It takes high input from Ain,
low input from SGND.
In scan mode, ES269 can automatically switch to AC current measurement when the signal level on the
Ain pin exceeds 6mV. Since V and A are detected, the voltage measurement will take precedence.
Table 7. Current range for clamp meter
Mode
Full Scale
Input Terminal
Full scale
AR1
60.00A
Ain V.S. SGND
60.00mV
AR2
600.0A
Ain V.S. SGND
600.0mV

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ES269
6000 Counts Intelligent Auto-Function DMM IC
VAHz function
ES269 can automatically measure frequency of ACV or ACA and show the value on sub-display. The
maximum frequency range is 60KHz. For correct readings, the signal input level must exceed 10% of
full scale. The reading value will be shown on the sub-display in voltage or current mode.
Table 8. frequency range
Mode
Full Scale
FR1
600.0Hz
FR2
6.000KHz
FR3
60.00KHz
Resistance Measurement
A divider automatically provides a suitable full-scale range in resistance measurement mode. The
following table summarizes the full-scale ranges and the reference resistors in each configuration.
In scan mode, it automatically switches to resistance measurement as the resistance value exceed 600.1
Ω.
In auto mode, ES269 can automatically switch to appropriate range for measurement.
In manual mode, User can switch range by Range key.
Table 9. Resistance ranges
Configuration
Full Scale Range
Reference Resistor
Equivalent value
R1
600.0Ω3
OR1
200Ω
R2
6.000KΩ
VR4
2KΩ
R3
60.00KΩ
VR3 || VR1
20KΩ
R4
600.0KΩ
VR2 || VR1
200KΩ
R5
6.000MΩ
VR1
2MΩ
R6
60.00MΩ4
OR2
20MΩ
3
continuity check is implemented in this range
4
60MΩrange is only available in non-scan mode.

Ver 1.2 11 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Continuity test
Continuity test shares the same configuration with 600.0Ω manual resistance measurement mode and
has buzzer output to indicate continuity. The buzzer generates 2KHz beep whenever the reading is less
than 30Ω or 50Ω. The boundary can be selected by S600VEFSEL pin. See Table 12 for details.
In scan mode, it automatically switches to continuity test as resistance value is lower than 600.0Ω.
In EF unit, OPO_R, OPO_G, and OPO_Y are LED outputs. OPO_G is high if a complete path resistor
is less than 50Ω/30Ω. Otherwise OPO_R is high.
Diode Measurement
Diode measurement mode shares the same configuration with 6.000V manual voltage measurement
mode and has buzzer output to indicate continuity. The buzzer generates a 2KHz sound whenever the
reading is less than 30mV. If the test circuit is open or the voltage drop between the two ports of the
DUT is larger than 2V, the LCD panel will show “OL”.

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ES269
6000 Counts Intelligent Auto-Function DMM IC
Capacitance Measurement
In scan mode, it automatically switches to capacitance measurement as capacitance exceeds 200pF. It
can be manually switched to capacitance measurement by SELKey to measure larger or smaller
capacitance. The 60.00mF range supports only non-scan mode.
In EF unit, the OPO_Y is high if the capacitor is charging. The OPO_G is high after capacitor is
charged.
The following table summarizes the eight ranges of capacitance measurement mode:
Table 10. Capacitance ranges
Configuration
Full Scale Range
Relative component
Measurement period
C1
6.000nF
Ratio to C2
0.363s
C2
60.00nF
Ratio to CAL
0.363s
C3
600.0nF
Ratio to C2
0.753s
C4
6.000uF
R9K / R1K
0.26s
C5
60.00uF
R9K / R1K
1.3s
C6
600.0uF
R9K / R1K
2.6s (max)
C7
6.000mF5
R9K / R1K
2.6s (max)
C8
60.00mF5
R9K / R1K
13s (max)
To obtain an accurate reading, a capacitor must be discharged before measurement begins. The chip has
a built-in discharge mode to automatically discharge the capacitor. In discharge mode, the LCD
displays “dIS.C” Discharging through the chip is quite slow. We recommend users to discharge the
capacitor with some other apparatus.
5
The C7-C8 both range is not available for auto scan mode

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ES269
6000 Counts Intelligent Auto-Function DMM IC
Electrical field detection test
ES269 supports a non-contact AC voltage measurement, which is called electric field measurement
also.
Press the EF key to enter EF test and press it again to exit EF test.
The ADC input is configured from EFin pin vs. SGND. When no or less electric field is detected, the
LCD display shows “EF”. If the electric field is detected, the strength will be showed on the LCD
display by “-“ not digits type. Level 1(equivalent to 12.5% full scale of ADC) is “-“ and the level
4(equivalent to 100% full scale of ADC) is “----“. Additional beeper (BUZOUT pin) and LED alarm
(ALARM pin) will be active from ES269. The frequency of buzzer and LED alarm depends on the
strength of electric field also. The faster beeper means the stronger electric field (AC voltage) is sensed.
In EF unit, OPO_R, OPO_G, and OPO_Y are LED outputs. OPO_G, OPO_Y, and OPO_R outputs
high which represent the detected weak, medium, and strong signal, respectively.
In EF normal, the three pin is not used.
EFin
100M
EF test circuit
EFin+
SGND
AGND
EFin-
100k
VRAD
P
-400mV

Ver 1.2 14 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Auto power off mode (APO)
Idle Time selection
ES269 has a default auto power-off function. If the meter is idle for more than the given Idle Time, it
automatically turns the power off. The idle time can be selected by pin ‘CLAMPAPO’. See Table 13 for
details.
Sleep output
The meter enters sleep mode after auto power-off or push SEL key to last for 2s. The SLEEP pin asserts
low (-3V) in the sleep mode, and asserts high (+3V, not 0V) after re-power on.
Re-power on
After auto power-off is active, press SEL key over 2 seconds can turn on the meter again.
Hazardous Voltage Indication
The ES269 could provide the AC/DC hazardous voltage indication for voltage/resistor/ diode modes.
Of course, the indication could support LCD symbol / LED (ALARM pin) /Buzzer driving
simultaneously. Especially ES269 could detect the AC voltage in DCV mode and detects the DC
voltage in ACV mode. It means if not proper AC or DC voltage signal exists on the device under test
when DCV or ACV measurement mode is set, the HV indication will be active
HV indication criterion
Function / Range
DC voltage (typ.)
AC voltage (typ.)
AC 6V
> +30V
OL
AC 60V –1000V
> +60V
> 30Vrms
DC 6V
OL
> 20Vrms (40-1kHz)
DC 60V-1000V
> +30V
> 70Vrms (40-1kHz)
Res/Cap/Diode modes
> +10V
> 10Vrms (40-1kHz)
Note: If AC+DC signal is applied, the voltage criterion will be changed.

Ver 1.2 15 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Low Battery Voltage Detection
ES269 provides a voltage detection input (pin 95: BAT9) for non-3V battery application. When BAT9 is
less than VRH terminal voltage, the LCD segment of low battery will appear. For 3V battery
application, pull BAT9 to AGND directly and the same detection will be made when V- is less than
2.3V typ.. When the Low battery status lasts for 10 seconds, the LCD segment of low battery will be
blinking. When the symbol is blinking for 20 seconds, the operation of meter will be inhibited and
LCD panel will show “ Lo.bt”. In this case, it is suggested to replace a new battery immediately. After
“Lo.bt” appears and lasts for 60 seconds, ES269 will enter to auto power off mode.
Low battery test ( 9V battery)
680K
270K
BAT
BAT9
V-
AGND
0.1u
0V
9V

Ver 1.2 16 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Push Function
All the enabled push functions will be reset when the measurement mode is changed. Change
measurement mode by SEL function will reset HOLD function. The following table lists the available
function versus every measurement mode.
Table 11. The function keys are available in each measurement mode.
Key name
EF
RGP
MMXP
SEL
HOLD
BKLIT
Key function
<1s
<1s
<1s
<1s
≥1s
<1s
≥1s
<1s
≥1s
EF
function
Range
Change
MAX.&MIN.
function
Switch
measurement
Power
ON/OFF
Hold
Delay
Hold
Backlight
control
Flashing
control
Scan
O
X
X
O
O
O6
O6
O
O
VAC
O
O
O
O
O
O
O
O
O
VDC
O
O
O
O
O
O
O
O
O
EF
O
O
O
O
O
X
X
O
O
IAC
O
O
O
O
O
O
O
O
O
IDC
O
O
O
O
O
O
O
O
O
Resistance
O
O
O
O
O
O
O
O
O
Continuity
O
O
O
O
O
O
O
O
O
Diode
O
O
O
O
O
O
O
O
O
Capacitance
O
O
O
O
O
O
O
O
O
SEL key function
In auto scan mode, the ES269 automatically selects the appropriate measurement mode and range.
Press the SEL key for less than one second to cycle through the measurement functions. Press the key
over 1 second, the ES269 will enter power down mode. If power down mode is entered, only press SEL
key to last for 2 seconds or apply the power to V- terminal could re-power on the ES269. The following
figure shows the state transition.
When the DISFLHSEL pin is left floating or connected to V-, the SEL key function will be enabled.
Othwise, the SEL key function will be disabled. See Table 14 for details.
6
When input terminal is floating, and LCD shows “----“, HOLD function is not available.

Ver 1.2 17 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Figure 1. Power control
Figure 2. Press SELKey to cycle through functions for multi-meter model

Ver 1.2 18 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Figure 3. Press SEL key to cycle through functions for current measurement of multi-meter model
Figure 4. Press SELKey to cycle through functions for clamp-meter model

Ver 1.2 19 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Hold and delay-hold key function
The data hold mode makes the meter stop updating the LCD panel. This mode can be nested in most of
the special modes. Enabling hold function in automatic mode makes the meter switch to manual mode.
Hold function can be cancelled by changing the measurement mode, pressing SEL, or pressing HOLD
again.
The delay-hold function is enabled when HOLD key is pressed over 2 seconds. When delay-hold
function is entered successfully, the meter will stop to update the LCD data after six seconds delayed.
During the six seconds waiting, the HOLD symbol on LCD panel will be blinking.
Figure 5. The state diagram of pressing HOLD
Back light / Flashlight key function
Press the BKLIT key less than 1 second to toggle the back light output driving ON/OFF. Press the
PKLIT key over 1 second to toggle the flashlight output driving ON/OFF.
When the DISFLHSEL pin is connected AGND/V-, the flashlight function will be enabled. Othwise,
the flashlight function will be disabled. See Table 14 for details.

Ver 1.2 20 22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
EF key function
ES269 supports a non-contact ac voltage measurement, which is called electric field measurement also.
Press EFKEYP less than 1 second to enter EF function. When press it again to exit EF function. The
ADC input is configured from EFin pin vs. SGND. When no or less electric field is detected, the LCD
shows “EF”. If the detector senses electric field, the strength will be showed on LCD by “-“ not digits
type. Level 1(weak) is “-“ and the level 4(strong) is “----“. Additional beeper will be output from
BUZOUT pin. The buzzer frequency depends on the strength of electric field also. The Faster beeper
means the stronger electric field (ac voltage) is sensed. The buzzer can be disabled through
S600VEFSEL pin. See Table 12 and 錯誤! 找不到參照來源。 for details.
Range key function.
Push RANGE key to switch from automatic to manual mode, and while in manual mode, changes the
full-scale range. The following figure shows the state transition.
Automatic
Mode Manual
Mode
1 push < 1 sec
1 push > 1 sec
1 push < 1 sec
Range up
Measurement Mode
Control Range
Initial Range
V
6.000V –1000V
6.000V
mA
60.00mA –600.0mA
60.00mA
A
6.000A –20.00A
6.000A
60A/600A (clamp)
60.00A –600.0A
60.00A
Capacitance
6.000nF–60.00mF7
6.000nF
Ω
600.0Ω – 60.00MΩ
600.0Ω
7
60.00mF supply only in non-scan mode.