ADG438F
PRODUCTIONHigh Performance, 8-Channel, Fault-Protected Analog Multiplexer
- Part Models
- 3
- 1ku List Price
- Starting From $4.99
Part Details
- 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
tOFF150 ns max - Break-Before-Make Switching Action
- TTL and CMOS Compatible inputs
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
- 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.
- On channel saturates while fault exists.
- Low RON.
- Fast Switching Times.
- Break-Before-Make Switching. Switches are guaranteed break-before-make so that input signals are protected against momentary shorting.
- Trench Isolation Eliminates Latch-Up. A dielectric trench separates the p-channel and n-channel MOSFETs thereby preventing latch-up.
- 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
Documentation
Data Sheet 1
Application Note 1
Technical Articles 3
Product Selection Guide 1
Analog Dialogue 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADG438FBNZ | 16-Lead PDIP | ||
| ADG438FBRZ | 16-Lead SOIC | ||
| ADG438FBRZ-REEL | 16-Lead SOIC |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Mar 29, 2021 - 21_0033 Assembly Site Transfer for 14/16L 300_MIL PDIP to Cirtek |
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| ADG438FBNZ | PRODUCTION | |
|
Jul 12, 2011 - 11_0087 Re-design and Wafer Fabrication transfer of the ADG438F/ADG439F |
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| ADG438FBNZ | PRODUCTION | |
| ADG438FBRZ | PRODUCTION | |
| ADG438FBRZ-REEL | PRODUCTION | |
|
Aug 19, 2009 - 07_0024 Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad |
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| ADG438FBNZ | PRODUCTION | |
|
Oct 5, 2010 - 10_0146 Halogen Free Material Change for 14/16L SOIC_N Products |
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| ADG438FBRZ | PRODUCTION | |
| ADG438FBRZ-REEL | PRODUCTION | |
|
Dec 20, 2011 - 10_0139 Obsolesence notice for some models of the ADG508F, ADG509F and ADG528F |
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| ADG438FBNZ | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.