CMOS, Low Voltage, 3-Wire, Serially Controlled, Matrix Switch
The ADG738 is a CMOS analog matrix switch with a serially-controlled 3-wire interface. The ADG738 is an 8-channel matrix switch. On resistance is closely matched between switches and very flat over the full signal range.
The ADG738 utilize a 3-wire serial interface that is compatible with SPI™, QSPI™, MICROWIRE®, and some DSP interface standards. The output of the input shift register, DOUT, enables a number of these parts to be daisy-chained. On power-up, the internal input shift register contains all zeros and all switches are in the off state.
Each switch conducts equally well in both directions when on, making these parts suitable for both multiplexing and demulti-plexing applications. As each switch is turned on or off by a separate bit, these parts can also be configured as a type of switch array, where any, all, or none of the eight switches may be closed at any time. The input signal range extends to the supply rails.
All channels exhibit break-before-make switching action, preventing momentary shorting when switching channels.
The ADG738 is available in 16-lead TSSOP packages.Product Highlights
- 3-Wire Serial Interface.
- Single Supply Operation. The ADG738 is fully specified and guaranteed with 3 V and 5 V supply rails.
- Low On Resistance, 2.5 Ω typical.
- Any configuration of switches may be on or off at any one time.
- Guaranteed Break-Before-Make Switching Action.
- Small 16-lead TSSOP Package.
- Data Acquisition Systems
- Communication Systems
- Relay Replacement
- Audio and Video Switching
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
A 16-lead TSSOP device can be clamped or soldered to the center of the evaluation board. Each pin of the device has a corresponding link from K1 to K16 that can be set to either VDD or GND. A wire screw terminal supplies VDD and GND. SMB connectors on the board allow additional external signals to be supplied to the device. In addition, there is space available at the top of the board for prototyping.
Full specifications of the device under test (DUT) are available in the corresponding product data sheet, which should be consulted in conjunction with this user guide when using the evaluation board.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.