ST STEVAL-IME015V1 User manual

Introduction
The STEVAL-IME015V1 evaluation board is based on the STHV64SW high voltage switch matrix, designed for ultrasound
imaging applications.
The system can switch 64 independent high voltage channels through switch input and output connections on standard
2.54 mm headers, as well as through digital I/O’s. Each channel can be used as a switch for external transmitters or receivers,
or to directly drive transducers for low frequency applications.
A standard ultrasound probe connector can be soldered to the board to help evaluate the performance of the STHV64SW
device in your application.
Figure 1. STEVAL-IME015V1 evaluation board
How to use the evaluation board for the STHV64SW high voltage switch matrix
UM2482
User manual
UM2482 - Rev 1 - December 2018
For further information contact your local STMicroelectronics sales office.
www.st.com

1STEVAL-IME015V1 evaluation board overview
The STEVAL-IME015V1 evaluation board for the STHV64SW switch matrix device features the following
characteristics:
• Suitable for ultrasound imaging applications
• 64 high voltage channels
• Switch input and output header connectors
• High voltage and low voltage connectors to power the STHV64SW
• Digital input and output header connector
• Optional standard probe connector footprint
Figure 2. STEVAL-IME015V1 hardware block diagram
SW64
STHV64SW
SW1
output connectors
input connectors
power
connectors
digital
connectors
SW2
Figure 3. STEVAL-IME015V1 board layout
The STHV64SW device is ideal for high voltage channel multiplexing, and can drive a high number of probes. The
following figure shows a single STHV64SW connecting a 32-channel Tx/Rx front end to a 64-element probe.
The image below shows the connectors, jumpers and other board features.
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STEVAL-IME015V1 evaluation board overview
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Figure 4. Typical application block diagram
INACTIVE
ELEMENT
INACTIVE
ELEMENT
INACTIVE
ELEMENT
ELEMENT
ACTIVE
ELEMENT
ELEMENT
ACTIVE
ACTIVE
1.1 Power supply
The STEVAL-IME015V1 board is powered through connector CN10:
• VDDP: 3.3V DC
• VPP: positive high voltage, 0 to +200V DC
• VNN: negative high voltage, 0 to -200V DC
• RGND: bleeding resistor ground
• GND: common ground
Table 1. Power related jumpers
Connector Description
CN12
RGND bleeding resistor ground is available on CN10 connector.
Default Setting.
RGND bleeding resistor ground is shorted at common ground at board level.
Do not connect any voltage on RGND CN10 connector.
1.2 STHV64SW switch block
The STHV64SW switch block is implemented with two power transistors and a bleeding resistor connected
between output OUT and RGND (a dedicated ground for resistors). All power supply nets are in common for each
switch.
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Power supply
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Figure 5. STHV64SW switch block
circuit
RGND
Switch
STATE Driving
IN
VNN
VPP
OUT
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STHV64SW switch block
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2How to use the board
The start using the STEVAL-IME015V1 evaluation board, you only need to perform the following steps:
Step 1. Attach an appropriate power supply.
Step 2. Connect the channel headers to your oscilloscope.
Step 3. Connect channel headers to your transmitter, receiver or transducers.
Step 4. Connect digital I/Os to a digital controller like an FPGA, MCU or pattern generator.
RELATED LINKS
5 Connectors on page 10
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How to use the board
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3Digital interface
The STEVAL-IME015V1 provides full access to all the functional digital I/Os of the STHV64SW device. The
STHV64SW digital interface consists of a serial-input parallel-output 64-bit shift register.
Table 2. STHV64SW digital interface signals
Signal Name Function Maximum operating values
THERM_UVLO Thermal protection and undervoltage lock out output -0.3 to VDDP + 0.3
CLK Clock signal -0.3 to VDDP + 0.3
DIS Disable signal -0.3 to VDDP + 0.3
CLR Clear signal -0.3 to VDDP + 0.3
LE_N Latch enable -0.3 to VDDP + 0.3
DIN Serial interface data in -0.3 to VDDP + 0.3
DOUT Serial Interface data out 0.3 to VDDP + 0.3
Table 3. STHV64SW digital interface truth table
D0 D1 … D63 D64 LE_n CLR DIS SW0 SW1 .. SW63 SW64
L -
…
- - L L L OFF -
…
- -
H - - - L L L ON - - -
- L - - L L L - OFF - -
- H - - L L L - ON - -
- - - - L L L - - - -
… … …
- - - - L L L - - - -
- - L - L L L - - OFF -
- - H - L L L - - ON -
- - - L L L L - - - OFF
- - - H L L L - - - ON
X X X X X H L L HOLD PREVIOUS STATE
X X X X X X H L ALL SWITCHES OFF
X X X X X X X H ALL SWITCHES OFF / no chip current consumption
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Digital interface
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Figure 6. STHV64SW timing diagram
DIN
LE_n
CLK
DOUT
CLR
50% 50%
50% 50%
50%
50%
50%50%
Din NDin 63
t SU
t WLE
t H
t CLE
t DO
t WCL
Dout NDout 63
Din 0
Dout 0
50%
Figure 7. STHV64SW digital interface block diagram
Digital interface minimum required signals:
•DIN – Data In
– 1 for ON-STATE
– 0 for OFF-STATE
• CLK – Clock Signal
– 20 MHz typical freq.
• LE_N – Latch Enable (Active LOW)
– Allows writing the status in the switch latch to turn the switch on or off
Digital interface optional signals
• DOUT – Data Out
– Available for daisy-chain connection of 2 or more STHV64SW devices. Can be left floating when not
used.
• CLR – Clear Signals (Active HIGH)
– Resets the Latches to 0 (switches OFF), allowing the previous state to be left in the FF, available to be
written again in the Latches through LE_N. To be left to GND when not used.
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Digital interface
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• DIS – Disable (Active HIGH)
–It resets the logic, and both Latches and FF. They all go to 0. To be left to GND during operation.
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Digital interface
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4Operating conditions
Unless otherwise specified, VPP = 100 V, VNN = -100 V, VDDP = 3.3 V, RGND = 0 V, Tamb = 25 °C.
Table 4. Operating DC supply voltages
Symbol Parameter Min. Typ. Max. Value
VDDP Positive supply voltage +2.7 +3.3 +3.6 V
VNN Negative supply voltage 0 -100 -200 V
VPP Positive logic voltage 0 +100 +200 V
RGND Bleeding resistor ground voltage 0 0 VPP>RGND>VNN V
Table 5. Current consumption
Symbol Parameter Condition Min. Typ. Max. Units
IVPPQON Quiescent VPP supply current All switches on 120 180 uA
IVNNQON Quiescent VNN supply current All switches on 70 110 uA
IVDDPQON Quiescent VDDP supply current All switches on 930 1100 uA
IVPPQOFF Quiescent VPP supply current All switches off 50 nA
IVNNQOFF Quiescent VNN supply current All switches off 1.6 2.3 3.5 uA
IVDDPQOFF Quiescent VDDP supply current All switches off 780 820 uA
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Operating conditions
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5Connectors
5.1 Power supply connector
The STEVAL-IME015V1 is powered through connector CN10.
Figure 8. Power supply connector CN10
The suggested power up sequence to minimize the risk of damage to user devices attached to STEVAL-
IME015V1 is the following:
1. VDDP
2. VPP or VNN
3. VNN or VPP
Table 6. Power supply connector pinout
PIN Number Pin name (STHV64SW)
1 GND
2 VDDP
3 VNN
4 RGND
5 VPP
5.2 Digital interface connector
The STHV64SW signals are on the upper side of the digital interface connector (CN9), and common ground pins
are on the lower side.
Figure 9. Digital interface connector CN9
The following table shows pinout for the STHV64SW signals on connector CN9. All the other pins of the
connector are connected to ground.
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Connectors
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