Power Electronics

Power-Efficient, Less-Expensive, 2-Channel, 12-Bit SAR ADC

 The TS7001 from Touchstone Semiconductor is a 12-bit 187.5-ksps analog-to-digital converter (ADC) that can be used as a 1.5x faster/50% lower INL drop-in upgrade to the Analog Devices AD7887A. The TS7001 is a 50% smaller footprint and is also 1.5x faster versus the high-grade AD7887B in an SOIC-8. Priced at $1.15 in 1,000 piece quantities, the new Touchstone TS7001 is $3 less expensive than the Analog Devices' AD7887B and $2 less expensive than its AD7887A. In addition to all other Touchstone Semiconductor ICs, the TS7001 is in stock and ready to ship from Digi-Key, Touchstone's authorized distributor. Packaged in a MSOP-8, the TS7001 combines a 10-MHz track-and-hold (T/H), a high-speed 3-wire serial digital interface and an internal ±0.5%-initial accuracy +2.5V reference. Operating from +2.7V to +3.6V supplies, it consumes approximately 3mW when converting at 187.5ksps. The new TS7001's features include: ·     3-mW power consumption at 187.5ksps while operating from a single +2.7V to +3.6V. ·     One or two analog inputs each with an input range from 0V to VREF or 0V to VDD. ·     Four user-programmable, low-power operating modes including auto standby and auto power down. ·     ±1LSB INL performance. ·     Shutdown-mode supply current: 1µA (max). ·     -40°C to +85°C operating temperature range. ·     Integrated 2.5-V, ±0.5%, 30ppm/°C reference ·     A $1.15 price at 1k-piece quantities: $3 less than the AD7887B and $2 less than AD7887A. The TS7001 is an ideal choice for an easy-to-use, stand-alone 12-bit ADC in low-power, industrial, process control and data-acquisition applications. Some portable and fixed-form-factor applications for the TS7001 include: optical sensors, touch panels, personal digital assistants, programmable logic controllers and medical instrumentation.  
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