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MAX4936A, MAX4937A
Octal High-Voltage Transmit/Receive Switches
Integrated Transmit/Receive Switches Significantly Reduce Component Count While Reducing Power
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Status
Active: Data sheet on request only
Description
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 1–4
and channels 5–8, 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 low-voltage 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.
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Data Sheet
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An evaluation kit is available: MAX4936AEVKIT
Key Features
- Save Space—Optimized for High-Channel-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 Grass-Clipping 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 Performance—Designed to Enhance Image Quality
- Low Noise at Low Power Consumption (< 0.5nV/√Hz (typ) with 1.5mA Bias Current)
- Wide -3dB Bandwidth 100MHz (typ)
- Low-Voltage Receive Path with High-Voltage Protection
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Applications/Uses
- High-Voltage Transmit and Low-Voltage Isolation
- Medical/Industrial Imaging
- Ultrasound
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Key Specifications:
| Switches and Multiplexers (Mid Voltage) |
| Part Number |
Functions |
Config. |
Channels |
VSUPPLY (Single)
(V) |
VSUPPLY (Single)
(V) |
RON
(Ω) |
BW
(MHz) |
| min |
max |
max |
| MAX4936A NEW! |
Switch |
Diode bridge |
8 |
-120 |
120 |
5 |
65 |
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See All Switches and Multiplexers (Mid Voltage) (305)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Reliability Reports
| Reliability Report: |
MAX4936A.pdf |
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX4936ACTO+
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Active: Data sheet on request only |
TQFN;42 pin;32.8 mm²
Outline Drawing:21-0181 (PDF)
Land Pattern: 90-0078 (PDF)
Use pkgcode/variation: T423590+1*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4936ACTO+T
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Active: Data sheet on request only |
TQFN;42 pin;32.8 mm²
Outline Drawing:21-0181 (PDF)
Land Pattern: 90-0078 (PDF)
Use pkgcode/variation: T423590+1*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4937ACTO+
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Active: Data sheet on request only |
TQFN;42 pin;32.8 mm²
Outline Drawing:21-0181 (PDF)
Land Pattern: 90-0078 (PDF)
Use pkgcode/variation: T423590+1*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4937ACTO+T
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Active: Data sheet on request only |
TQFN;42 pin;32.8 mm²
Outline Drawing:21-0181 (PDF)
Land Pattern: 90-0078 (PDF)
Use pkgcode/variation: T423590+1*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-6071
Rev 0;
2011-11-04
This page last modified: 2012-05-04
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