ADG439F - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADG439F
Manufacturer

ADI
ChipWorker Part#

CW760493836
Description

15V, Fault Protected, 4Channel High Performance Analog Multiplexer
Documentation

Datasheet

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ADG439F Specifications

Attribute	Attribute Value

Part Number	ADG439F
Manufacturer	ADI
ChipWorker Part#	CW760493836
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
The ADG438F and ADG439F are CMOS analog multiplexers, with the ADG438F comprising eight single channels and the ADG439F comprising four differential channels. These multiplexers provide fault protection. Using a series n-channel, p-channel, and n-channel MOSFET structure, both device and signal source protection is provided in the event of an overvoltage or power loss. The multiplexer can withstand continuous overvoltage inputs from −40 V to +55 V. During fault conditions with power supplies off, the multiplexer input (or output) appears as an open circuit and only a few nanoamperes of leakage current flows. This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources which drive the multiplexer.
The ADG438F switches one of eight inputs to a common output as determined by the 3-bit binary address lines, A0, A1, and A2. The ADG439F switches one of four differential inputs to a common differential output as determined by the 2-bit binary address lines, A0 and A1. An EN input on each device is used to enable or disable the device. When disabled, all channels are switched off.
**Product Highlights**
1. Fault Protection. The ADG438F and ADG439F can with-stand continuous voltage inputs up to −40 V or +55 V. When a fault occurs due to the power supplies being turned off, all the channels are turned off and only a leakage current of a few nanoamperes flows.
2. On channel saturates while fault exists.
3. Low RON.
4. Fast Switching Times.
5. Break-Before-Make Switching. Switches are guaranteed break-before-make so that input signals are protected against momentary shorting.
6. Trench Isolation Eliminates Latch-Up. A dielectric trench separates the p-channel and n-channel MOSFETs thereby preventing latch-up.
7. Improved Off Isolation. Trench isolation enhances the channel-to-channel isolation of the ADG438F/ADG439F.
**Applications**
Data acquisition systems
Industrial and process control systems
Avionics test equipment
Signal routing between systems
High reliability control systems
### Features and Benefits
All switches off with power supply off
Analog Output of ON Channel Clamped within Power Supplies If an Overvoltage Occurs
Latch-up proof construction
Fault and Overvoltage Protection (-40 V + 55 V)
Fast switching times
ton 250 ns max
toff 150 ns max
Break-before-make construction
TTL and CMOS Compatible inputs
16-Lead DIP/SOIC Packages

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