ST STEVAL-IME015V1 Bedienungsanleitung

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.

UM2482

STEVAL-IME015V1 evaluation board overview

UM2482 - Rev 1 page 2/25

Figure 4. Typical application block diagram

INACTIVE

ELEMENT

INACTIVE

ELEMENT

INACTIVE

ELEMENT

ACTIVE

ELEMENT

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

UM2482 - Rev 1 page 3/25

Figure 5. STHV64SW switch block

circuit

RGND

Switch

STATE Driving

VNN

VPP

OUT

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STHV64SW switch block

UM2482 - Rev 1 page 4/25

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

UM2482

How to use the board

UM2482 - Rev 1 page 5/25

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

UM2482 - Rev 1 page 6/25

Figure 6. STHV64SW timing diagram

DIN

LE_n

CLK

DOUT

CLR

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

UM2482 - Rev 1 page 7/25

• 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

UM2482 - Rev 1 page 8/25

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

UM2482 - Rev 1 page 9/25

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

UM2482 - Rev 1 page 10/25

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