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The ADG725/ADG731 are monolithic CMOS 32 channel/dual 16 channel analog multiplexers with a serially controlled 3-wire interface. The ADG732 switches one of thirty-two inputs (S1-S32) to a common output, D. The ADG725 can be configured as a dual mux switching one of sixteen inputs to one output or a differential mux switching one of sixteen inputs to a differential output.
These mulitplexers utilize a 3-wire serial interface that is compatible with SPITM, QSPITM, MICROWIRETM and some DSP interface standards. On power-up, the internal shift register contains all zeros and all switch are in the OFF state.
These multiplexers are designed on an enhanced submicron process that provides low power dissipation yet gives high switching speed, very low on resistance and leakage currents. They operate from single supply of 1.8V to 5.5V and ±2.5 V dual supply, making them ideally suited to a variety of applications. On resistance is in the region of a few Ohms and is closely matched between switches and very flat over the full signal range. These parts can operate equally well as either Multiplexers or De-Multiplexers and have an input signal range which extends to the supplies. In the OFF condition, signal levels up to the supplies are blocked. All channels exhibit break before make switching action preventing momentary shorting when switching channels.
They are available in either 48 lead CSP or TQFP package.
ADG725 Maximum Ratings
VDD to VSS ........................................................+7 V VDD to GND....................................... 0.3 V to +7 V VSS to GND ........................................+0.3 V to -7 V Analog Inputs2............. VSS - 0.3 V to VDD +0.3 Vor 30 mA, Whichever Occurs First Digital Inputs2 .....................-0.3V to VDD +0.3 V or 30 mA, Whichever Occurs First Peak Current, S or D .....................................60mA (Pulsed at 1 ms, 10% Duty Cycle max) Continuous Current, S or........................... D 30mA Operating Temperature Range Industrial (B Version) ....................40°C to +85°C Storage Temperature Range...... 65°C to +150°C Junction Temperature................................ +150°C 48 lead CSP JA Thermal Impedance...... .TBD°C/W 48 lead TQFP JA Thermal Impedance.... .TBD°C/W Lead Temperature, Soldering (10seconds). .300°C IR Reflow, Peak Temperature +220°C
NOTES 1Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Only one absolute maximum rating may be applied at any one time. 2Overvoltages at SCLK, DIN,RS,S or D will be clamped by internal diodes. Current should be limited to the maximum ratings given.
ADG725 Features
` 3-Wire SPI Serial Interface ` 1.8 V to 5.5 V Single Supply ` ±2.5 V Dual Supply Operation ` 4 On Resistance ` 0.5 On Resistance Flatness ` 7mm x 7mm 48 lead Chip Scale Package (CSP) or 48 lead TQFP package. ` Rail to Rail Operation ` Power On Reset ` Fast Switching Times ` Single 32 to 1 Channel Multiplexer ` Dual/Differential 16 to 1 Channel Multiplexer ` TTL/CMOS Compatible Inputs ` For Functionally Equivalent devices with Parallel Interface See ADG726/ADG732
ADG725 Typical Application
· Optical Applications · Data Acquisition Systems · Communication Systems · Relay replacement · Audio and Video Switching · Battery Powered Systems · Medical Instrumentation · Automatic Test Equipment