Datasheet ADG725, ADG731 (Analog Devices)

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16-/32-Channel, Serially Controlled 4 1.8 V to 5.5 V, 2.5 V, Analog Multiplexers ADG725/ ADG731 FEATURES FUNCTIONAL BLOCK DIAGRAM 3-Wire SPI Compatible Serial Interface 1.8 V to 5.5 V Single Supply ADG731 ADG725 2.5 V Dual-Supply Operation 4 On Resistance S1 S1A DA 0.5 On Resistance Flatness S16A 7 mm x 7 mm 48-Lead Chip Scale Package (LFCSP) or 48-Lead TQFP Package D Rail-to-Rail Operation S1B Power-On Reset DB 42 ns Switching Times S32 S16B Single 32-to-1 Channel Multiplexer Dual/Differential 16-to-1 Channel Multiplexer INPUT SHIFT INPUT SHIFT REGISTER REGISTER TTL/CMOS Compatible Inputs For Functionally Equivalent Devices with Parallel Interface, See ADG726/ADG732 SCLK DIN SYNC SCLK DIN SYNC APPLICATIONS Optical Applications Data Acquisition Systems Communication Systems Relay Replacement Audio and Video Switching Battery-Powered Systems Medical Instrumentation Automatic Test Equipment GENERAL DESCRIPTION
These parts can operate equally well as either multiplexers or The ADG731/ADG725 are monolithic, CMOS, 32-channel/ demultiplexers and have an input signal range that extends to the dual 16-channel analog multiplexers with a serially controlled supplies. In the OFF condition, signal levels up to the supplies 3-wire interface. The ADG731 switches one of 32 inputs are blocked. All channels exhibit break-before-make switching (S1–S32) to a common output, D. The ADG725 can be config- action, preventing momentary shorting when switching channels. ured as a dual mux switching one of 16 inputs to one output, or a The ADG731 and ADG725 are serially controlled 32-channel, differential mux switching one of 16 inputs to a differential output. and dual/differential 16-channel multiplexers, respectively. They These mulitplexers utilize a 3-wire serial interface that is com- are available in either a 48-lead LFCSP or TQFP package. patible with SPI®, QSPI™, MICROWIRE™, and some DSP interface standards. On power-up, the Internal Shift Register
PRODUCT HIGHLIGHTS
contains all zeros and all switches are in the OFF state. 1. 3-Wire Serial Interface. These multiplexers are designed on an enhanced submicron 2. 1.8 V to 5.5 V Single-Supply or ± 2.5 V Dual-Supply process that provides low power dissipation yet gives high switch- Operation. These parts are specified and guaranteed ing speed with very low on resistance and leakage currents. with 5 V ± 10%, 3 V ± 10% single-supply, They operate from a single supply of 1.8 V to 5.5 V or a and ± 2.5 V ± 10% dual-supply rails. ±2.5 V dual supply, making them ideally suited to a variety of 3. On Resistance of 4 W. applications. On resistance is in the region of a few ohms, is closely matched between switches, and is very flat over the full 4. Guaranteed Break-Before-Make Switching Action. signal range. 5. 7 mm ¥ 7 mm 48-Lead Chip Scale Package (LFCSP) or 48-Lead TQFP Package.
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