Microchip Technology EV07D36A, Руководство пользователя

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HV2916 ANALOG SWITCH
EVALUATION BOARD
USER’S GUIDE

2021 Microchip Technology Inc. DS50003160A-page 9
Chapter 1. Product Overview
1.1 INTRODUCTION
The HV2916 Analog Switch Evaluation Board (EV07D36A) works with the Microchip
HV MUX Controller Board (ADM00825) to provide single 5V bias, low harmonic
distortion, 32-channel, high-voltage analog switch demonstration, including basic
switch on/off operation, and 2:1 MUX operation to transmit ±100V high-voltage pulse
burst from two built-in MD1822 and TC6320 pulser circuits.
1.2 HV2916 DEVICE SHORT OVERVIEW
The HV2916 device is a single 5V bias, low harmonic distortion, 32-channel,
high-voltage analog switch (with bleed resistors in SWT pins). It is designed to be used
in applications requiring high-voltage switching, controlled by low-voltage control
signals, such as medical ultrasound imaging, driving piezoelectric transducers and
printers. Each analog switch has a typical 6

on-resistance and can conduct currents
up to ±2.9A. The switches can withstand ±100V (at the SWS pins) and can conduct
pulses with widths up to 2.5 µs without the need for high voltage supplies. It requires
only a +5V single bias voltage supply at V
DD
and V
LL
for the switch operation. The user
can also use +3.3V instead of +5V for the logic voltage, V
LL
, in order to reduce power
consumption.
The HV2916 device has a digital serial interface to control the 32 analog switches
individually. The digital interface clock operates at frequencies up to 66 MHz.
The HV2916 has an asymmetric topology which is smaller in size compared to a
no-high-voltage-bias analog switch with symmetric topology. A switch in HV2916 has
an SWT terminal and an SWS terminal. Since the HV2916 has asymmetric topology,
the SWT pin and the SWS pin are not interchangeable. The SWT pin can pass a
high-voltage pulsed signal applied to the SWS pin, when the switch is ON state. When
the switch is OFF state, high-voltage should not be applied to the SWT pin. In a medical
ultrasound system, the SWS pin is connected to Tx/Rx and the SWT pin is connected
to a single piezoelectric transducer element in order to avoid high-voltage at the SWT
pin during the switch OFF state.
1.3 HV2916 ANALOG SWITCH EVALUATION BOARD FEATURES
• HV2916 Single 5V Bias, Low Harmonic Distortion, 32-Channel,
High-Voltage Analog Switch with Bleed Resistors in SWT Pin
• Designed to work with the Microchip HV MUX Controller Board (ADM00825)
• Two 2:1 MUX channels with built-in MD1822 and TC6320 Pulsers
• 5 MHz 3-Level High-Voltage Pulse Burst Outputs
• On-Board 330 pF//2.5 k

Dummy Load on SW8T, SW9T, SW24T, SW25T Pins
• Pulser ON/OFF and Time Domain Control through the PC GUI (Graphic User
Interface) and the HV MUX Controller Board