Analog Devices LTC5597 User manual

1
DEMO MANUAL DC3129A-KIT
Rev. 0
DESCRIPTION
LTC5597 Linduino Shield 100MHz to
70 GHz RMS Power Detector
Demonstration circuit DC3129A-KIT is a Linduino
®
evalu-
ation kit for RMS Power Detector LTC
®
5597. It is set up
for quick evaluation of RMS RF power measurement using
the Arduino/Linduino compatible platform and software
download available. When connected to PC with USB
cable, accurate power level can be monitored using the
graphic user interface.
The LTC5597 is a wide dynamic range linear-in-dB RMS
RF Power Detector, operational from 100MHz to 70GHz.
The Linduino (DC2026C) platform provides 10-bit ADC at
4.9mV/LSB resolution with 5V default reference voltage.
Input dynamic range with 1dB accuracy is up to 35dB
depending on frequency. The detector output slope is
normally 6 LSB/dB. The DC3129A-KIT is optimized for
wide operational frequency signals up to 70GHz using
the 1.85mm edge mount connector. Input impedance is
internally matched to 50Ω. It is suitable for RMS mea-
surements of high crest factor waveforms up to 12dB
peak-to-average. No external coupling capacitor is neces -
sary if DC voltage at RFIN pin is kept below 1.0V. On board
All registered trademarks and trademarks are the property of their respective owners.
(Note 1)
Supply Voltage(VCC): +3.8V
DC Voltage at RFIN: –0.3V to 1.0V
DC Voltage at FLTR: –0.3V to 0.4V
DC Voltage at EN: –0.3V to 3.8V
RFIN Input Power-Average: +15dBm
TJMAX 150°C
Case Operating Temperature Range –40°C to 105°C
Storage Temperature Range –65°C to 150°C
Note 1:Voltage on all pins must not exceed VCC+0.3V
or be less than –0.3V.
CAUTION: This part is sensitive to electrostatic discharge
(ESD). Observe proper ESD precautions when handling
the LTC5597.
TEST SETUP
ABSOLUTE MAXIMUM INPUT RATINGS
3.3V regulator provides power to the shield by jumper
JP1. Contact applications support for more information.
Design files for this circuit board are available.
Figure1. Test Setup for RF Performance Measurements

2
DEMO MANUAL DC3129A-KIT
Rev. 0
NOTES ON TEST EQUIPMENT AND SETUP
1. Remove the DC3129A-KIT from its protective packag-
ing in an ESD-safe working area, connect USB cable
to PC(see Figure1).
2. Set JP1 which provides the 3.3V to VCC by the on board
regulator.
3. Download and install QuikEval if it’s not yet installed.
4. The Eval Kit comes with a Linduino board pre-loaded
with firmware. Follow Figure2 to re-load the firmware
if necessary, which can be downloaded from www.
analog.com.
5. Follow instruction from QuikEval which will automati-
cally update the GUI.
6. Connect USB cable from PC to Linduino board. Con-
nect the RF input to the signal generator at the 1.85mm
connector, J1.
7. Set the frequency and power level (less than +10dBm)
of the signal generator.
8. Open QuikEval, and set the frequency of signal to be
measured. Push “READ” to measure RF power. Using
the default calibration would be loading the nominal
slope and intercept from LTC5597 data sheet values.
See Figure3.
9. Forhigheraccuracy,Calibrationcanbeperformed using
the GUI at various frequency with two point calibration.
Set input power level to the corresponding calibration
points on the GUI, and calibrate accordingly by clicking
the corresponding button.
10. Read RF power using the GUI.
QUICK START PROCEDURE
DEMO BOARD USAGE NOTES
n
Use a high performance signal generator with accu-
rate output power levels up to 70GHz, such as Agilent
E8257D.
n
DC3129A-KIT includes Linduino DC2026C, and the
demo board DC3128A assembled with1.85mm con-
nector for best performance up to 70GHz.
nConnecting cable for RF signal should be rated up to
70GHz for the best performance.
n
Optional input attenuation can be used to improve
return loss, but also shifts the log intercept point
accordingly.
1. Evaluation DC3129A-KIT has provisions for inter-stage
filter cap. Additional capacitor (C3) can be added to
slow down the transient response to reduce the output
ripple. The range for C3 is 10pF to 1nF.
2. Output power is calculated using slope and intercept.
3. ADC count • 4.9mV/slope+intercept=output power.
Slope is derived from two point calibration in the linear
region of transfer function.
4. A minimum two point calibration is necessary for most
applications. Additional calibration points will improve
the accuracy of the power detection.

3
DEMO MANUAL DC3129A-KIT
Rev. 0
Figure3. GUI
Figure4. Calibration
DEMO BOARD USAGE NOTES
Figure2. Firmware Re-Load (Only If Necessary)

4
DEMO MANUAL DC3129A-KIT
Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C1 CAP., CX Series, (16kHz to 40GHz), 0.1µF, YD, 16V,
10%, 0402
MURATA, 935152424610-T3N
2 2 C3, C14 CAP., 0.01µF, X7R, 16V, 10%, 0402 MURATA, GRM155R71C103KA01D
NIC, NMC0402X7R103K16TRPF
3 1 C4 CAP., 1µF, X5R, 10V, 10%, 0402 MURATA, GRM155R61A105KE15D
AVX, 0402ZD105KAT2
TDK, C1005X5R1A105K050BB
4 1 C8 CAP., 10pF, NP0, 50V, 10%, 0402 AVX, 04025A100KAT2A
5 0 C10 CAP., OPTION, 0402
6 2 C11, C15 CAP., 0.1µF, X7R, 16V, 10%, 0402 AVX, 0402YC104KAT2A
Taiyo Yuden, EMK105B7104KV-F
TDK, C1005X7R1C104K050BC
7 2 C12, C13 CAP CER 10UF 6.3V X5R 0402 TDK Corporation, C1005X5R0J106M050BC
8 5 E1, E2, E3, E4, E5 TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0
9 1 J1 CONN., SMA, 1.85mm, JACK TO EDGE LUNCH, DC-67GHz SOUTHWEST MICROWAVE 1892-03A-6
10 1 J2 CONN., HDR, FEMALE, 1x10, 2.54mm, THT, STR SULLINS CONNECTOR SOLUTIONS, PPPC101LFBN-RC
11 2 J3, J4 CONN., HDR, FEMALE, 1x8, 2.54mm, STR, THT SULLINS CONNECTOR SOLUTIONS, PPPC081LFBN-RC
12 1 J5 CONN., HDR., FEMALE, 1x6, 2.54mm, THT, STR SULLINS CONNECTOR SOLUTIONS, PPPC061LFBN-RC
13 1 J6 CONN., TERM. BLOCK, RCPT, 1x2, 5mm, SIDE ENTRY,
THT
TE CONNECTIVITY, 282836-2
14 2 JP1, JP2 CONN., HDR, MALE, 1x2, 2mm, VERT, STR, THT, 10u"
AU
SAMTEC, TMM-102-02-L-S
15 1 LB1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY, THT-96-717-10
16 1 PCB1 PCB, DC3128A ANALOG DEVICES INC., 600-DC3128A
17 1 R1 RES., AEC-Q200, 2k OHMS, 1%, 1/16W, 0402 VISHAY, CRCW04022K00FKED
NIC, NRC04F2001TRF
18 1 R2 RES., 1 OHM, 1%, 1/16W, 0402 VISHAY, CRCW04021R00FKED
19 0 R8, R14 RES., OPTION, 0402
20 3 R9, R10, R11 RES., 4.99k OHMS, 1%, 1/16W, 0402 NIC, NRC04F4991TRF
VISHAY, CRCW04024K99FKED
YAGEO, RC0402FR-074K99L
21 1 R12 RES., 100 OHMS, 1%, 1/16W, 0402 NIC, NRC04F1000TRF
YAGEO, RC0402FR-07100RL
22 1 R13 RES., 3k OHMS, 5%, 1/16W, 0402 VISHAY, CRCW04023K00JNED
23 1 STNCL1 TOOL, STENCIL, 700-DC3128A ANALOG DEVICES INC., 830-DC3128A
24 1 U1 IC, 100MHz to 70GHz Linear-in-dB RMS Power
Detector with 35dB Dynamic Range
LINEAR TECH, LTC5597_DC#PBF
25 1 U2 IC, LOW NOISE, LDO MICROPOWER REG., TSOT23-5 LINEAR TECH., LT1761ES5-3.3#PBF
LINEAR TECH., LT1761ES5-3.3#TRPBF
26 1 U3 IC, MEMORY, EEPROM, 2Kb (256x8), TSSOP-8,
400kHz
MICROCHIP, 24LC025-I/ST
MICROCHIP, 24LC025T-I/ST

5
DEMO MANUAL DC3129A-KIT
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
1. ALL RESISTORS ARE IN OHMS, 0402 2. ALL CAPACITORS ARE IN MICROFARADS, 0402
NOTE: UNLESS OTHERWISE SPECIFIED
DATE
REV DESCRIPTION APPROVED
ANDY M.
REVISION HISTORY
1 PRODUCTION 06-05-20
3.3V
5V
3.3V5V
5V
3.3V
3.3V
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
SKU NO. IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES APPLICATIONS ENGINEERING FOR ASSISTANCE.
2555 AUGUSTINE DRIVE
www.analog.com
ANALOG
DEVICES
AHEAD OF WHAT'S POSSIBLE TM
SANTA CLARA, CA 95054
11
KIM T.
ANDY M.
LTC5597IDC
100MHz - 70 GHz RMS POWER DETECTOR
DC3128A-1 710-DC3128A_REV01
N/A Friday, June 05, 2020DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
SKU NO. IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES APPLICATIONS ENGINEERING FOR ASSISTANCE.
2555 AUGUSTINE DRIVE
www.analog.com
ANALOG
DEVICES
AHEAD OF WHAT'S POSSIBLE TM
SANTA CLARA, CA 95054
11
KIM T.
ANDY M.
LTC5597IDC
100MHz - 70 GHz RMS POWER DETECTOR
DC3128A-1 710-DC3128A_REV01
N/A Friday, June 05, 2020DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
SKU NO. IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES APPLICATIONS ENGINEERING FOR ASSISTANCE.
2555 AUGUSTINE DRIVE
www.analog.com
ANALOG
DEVICES
AHEAD OF WHAT'S POSSIBLE TM
SANTA CLARA, CA 95054
11
KIM T.
ANDY M.
LTC5597IDC
100MHz - 70 GHz RMS POWER DETECTOR
DC3128A-1 710-DC3128A_REV01
N/A Friday, June 05, 2020
C4 1uF 10V
J2
1
2
3
4
5
6
7
8
9
10
C11 0.1uF
J5
ANALOG IN
1
2
3
4
5
6
J1
JACK
DC-70GHz
C14 0.01uF
C1 0.1uF
C13 10uF
X1
R9 4.99k
C15 0.1uF
J6
TE-282836-2
TERM. BLOCK
1 2
E1
3.3V
R12 100
R10 4.99k
E3
GND
E2
GND
JP1
HD1X2-079
E4
EN
U3
24LC025-I/ST
SDA 5
VCC 8
A0
1
A1
2
A2
3
VSS
4
WP 7
SCL 6
R2
1
J3
DIGITAL
1
2
3
4
5
6
7
8
PCB1 PCB, DC3128A REV01
R1
2k
R13
3k
R11 4.99k
U1
LTC5597
VCC
1
OUT
2
FLTR
3
GND
4GND 5
RFin 6
GND 7
EN 8
GND
9
C10 OPT
U2
LT1761-S5-3.3
GND
2
BYP 4
IN
1VOUT 5
SHDN
3
E5
VOUT
X2
R8
OPT
C12 10uF
JP2
HD1X2-079
R14
OPT
X3
C3
0.01uF
J4
POWER
1
2
3
4
5
6
7
8
C8 10pF
EN
SCL SDA
EGND
AREF
A0

6
DEMO MANUAL DC3129A-KIT
Rev. 0
 ANALOG DEVICES, INC. 2020
12/20
www.analog.com
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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