MP4898A

MP4898A

128-Channel, High-Voltage Analog Switch with Output Bleed Resistors and 5V Bias

Description

The MP4898A is a 128-channel, high-voltage (HV), single-pole single-throw (SPST) analog switch with integrated output bleed resistors, designed for medical ultrasound imaging applications. It is designed to multiplex the transmission and can receive voltages to and from multiple piezoelectric transducers (PZTs).

The 128 switches are configured as 64 1:2 multiplexers and demultiplexers. There are 64 switch inputs. Each switch input is connected to two switch outputs (SWOUTA and SWOUTB) for a total of 128 switch outputs. The MP4898A is controlled by two 64-bit serial shift registers, followed by two 64-bit latches. The switches can be turned on/off via the two 64-bit serial shift registers.

The MP4898A does not require any HV supplies. Only two low-voltage supplies are required (3.3V and 5V). The analog switch can block or pass analog voltages up to ±90V with peak currents of up to ±1.8A.

The MP4898A is available in a BGA-215 (10mmx20mm) package.

Features & Benefits

No High-Voltage (HV) Supplies Required
128 Channels
1:2 Multiplexer/Demultiplexer
Up to ±90V Analog Signals
14Ω Typical Switch Resistance
±1.8A Typical Switch Peak Current
Off-Isolation of -66dB at 5MHz
Integrated Output Bleed Resistor
60MHz Clock Frequency
5V Bias Supply
Available in a BGA-215 (10mmx20mm) Package

Active Part Numbers:

MP4898AGBV-T

Related Products

EV4898A-BV-03A 180V, 14Ω, 128-Channel Analog Switch Evaluation Board

The EV4898A-BV-03A is an evaluation board designed for the MP4898A, a high-voltage, 128-channel analog switch. The MP4898A is designed for medical ultrasound applications. It can also be used for non-destructive tests (NDTs), as this application is very similar to medical ultrasound.

The high-voltage, analog switches are used to multiplex the transmitter and receiver circuitries to different piezoelectric transducer (PZT) elements. The 128 switches are configured as 64 1:2 multiplexers and demultiplexers.

There are 64 switch inputs. Each switch input is connected to two switch outputs (SWOUTA and SWOUTB) for a total of 128 switch outputs. All switch outputs have integrated bleed resistors connected to ground. This ensures that a significant DC voltage does not build up across the PZT element. The MP4898A is controlled by two 64-bit serial shift registers, followed by two 64-bit latches. The switches can be turned on/off via the two 64-bit serial shift registers. The serial control interface minimizes the number of input/output (I/O) connections.

The EV4898A-BV-03A has two discrete high-voltage transmitters (TX1 and TX2) that are connected to the MP4898A’s input (SWIN) to help evaluate the MP4898A’s performance.

The EV4898A-BV-03A is designed to work with MPS’s ultrasound controller board (EV-EVKRD-01A). A graphical user interface (GUI) is provided to easily control the analog switch states, transmitters (TX1 and TX2), pulse widths, and pulse cycles.

$219.00
+ tax