MAX4936ACTO+T

MAX4936ACTO+T Datasheet

MAX4936A

Part	Datasheet
MAX4936ACTO+T	MAX4936ACTO+T (pdf)

Related Parts	Information
MAX4936ACTO+	MAX4936ACTO+

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MAX4936A Octal High-Voltage Transmit/Receive Switches Integrated Transmit/Receive Switches Significantly Reduce Component Count While Reducing Power Request Full Data Sheet Subscribe Active Data sheet on request only OVERVIEW The MAX4936A/MAX4937A are octal, high-voltage, transmit/receive T/R switches. The T/R switches are based on a diode bridge topology, and the amount of current in the diode bridges can be programmed by three digital inputs S0, S1, and S2 . Two control inputs EN1 and EN2 allow enabling/disabling channels and channels respectively. The MAX4936A includes the T/R switch and grass-clipping diodes, performing both transmit and receive operations. The MAX4937A includes just the T/R switch and performs the receive operation only. These devices feature low on-impedance in the entire ultrasound frequency range with extremely low power dissipation of 15mW typ per channel. The receive path for both devices is low impedance during lowvoltage receive and high impedance during high-voltage transmit, providing protection to the receive circuitry. The low-voltage receive path is high bandwidth, low noise, low distortion, and low jitter. The MAX4936A SWC_ pins can be driven with high-voltage signals using the anti-parallel diodes as grass clippers while connecting the SWB_ pins to the low-noise amplifier LNA . Connecting SWC_ to GND allows the internal anti-parallel diodes to be used as clamps. Grass-clipping diodes can then be connected to SWB_ and the LNA to SWA_. Both devices are available in a small, 42-pin, 3.5mm x 9mm TQFN package, and are specified over the commercial 0°C to +70°C temperature range. Key Features • Save for HighChannel-Count Systems High Density Eight Transmit/Receive Switches per Package Two Banks of Four Channels with Independent Enable Control EN1, EN2 Low-Capacitance Anti-Parallel Diodes to Be Used as GrassClipping or Clamping Diodes MAX4936A Only Small, 42-Pin, 3.5mm x 9mm, TQFN Package • Save Power Low 6Ω typ On-Impedance with 1.5mA Bias Current Only Adjustable Bias Resistors Allow Operation with Different Voltage Supplies • High to Enhance Image Quality Low Noise at Low Power Consumption < typ with 1.5mA Bias Current Wide -3dB Bandwidth 100MHz typ • Low-Voltage Receive Path with HighVoltage Protection Applications/Uses • High-Voltage Transmit and Low-Voltage Isolation • Medical/Industrial Imaging • Ultrasound 2015 Maxim Integrated \| Contact Us \| Careers \| Legal \| Privacy \| Cookie Policy \| Site Map 1/12/2015

PDF Datasheet Preview

MAX4936A

Octal High-Voltage Transmit/Receive Switches

Integrated Transmit/Receive Switches Significantly Reduce Component Count While Reducing Power

Request Full Data Sheet Subscribe

Active Data sheet on request only

OVERVIEW

The MAX4936A/MAX4937A are octal, high-voltage, transmit/receive T/R switches. The T/R switches are based on a diode bridge topology, and the amount of current in the diode bridges can be programmed by three digital inputs S0, S1, and S2 . Two control inputs EN1 and EN2 allow enabling/disabling channels and channels respectively. The MAX4936A includes the T/R switch and grass-clipping diodes, performing both transmit and receive operations. The MAX4937A includes just the T/R switch and performs the receive operation only.

These devices feature low on-impedance in the entire ultrasound frequency range with extremely low power dissipation of 15mW typ per channel.

The receive path for both devices is low impedance during lowvoltage receive and high impedance during high-voltage transmit, providing protection to the receive circuitry. The low-voltage receive path is high bandwidth, low noise, low distortion, and low jitter.

The MAX4936A SWC_ pins can be driven with high-voltage signals using the anti-parallel diodes as grass clippers while connecting the SWB_ pins to the low-noise amplifier LNA . Connecting SWC_ to

GND allows the internal anti-parallel diodes to be used as clamps. Grass-clipping diodes can then be connected to SWB_ and the LNA to SWA_.

Both devices are available in a small, 42-pin, 3.5mm x 9mm TQFN package, and are specified over the commercial 0°C to +70°C temperature range.

Key Features
• Save for HighChannel-Count Systems High Density Eight Transmit/Receive Switches per Package Two Banks of Four Channels with Independent Enable Control EN1, EN2 Low-Capacitance Anti-Parallel Diodes to Be Used as GrassClipping or Clamping Diodes MAX4936A Only Small, 42-Pin, 3.5mm x 9mm, TQFN Package
• Save Power Low 6Ω typ On-Impedance with 1.5mA Bias Current Only Adjustable Bias Resistors Allow Operation with Different Voltage Supplies
• High to Enhance Image Quality Low Noise at Low Power Consumption < typ with 1.5mA Bias Current Wide -3dB Bandwidth 100MHz typ
• Low-Voltage Receive Path with HighVoltage Protection

Applications/Uses
• High-Voltage Transmit and Low-Voltage Isolation
• Medical/Industrial Imaging
• Ultrasound
2015 Maxim Integrated | Contact Us | Careers | Legal | Privacy | Cookie Policy | Site Map
1/12/2015

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Datasheet ID: MAX4936ACTO+T 647358