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Power Electronics

Alternate Source 12-bit, 125-ksps ADC


Touchstone Semiconductor announced the immediate availability of the TSA7887, its first Analog Devices alternate source IC. The new TSA7887 is a two-channel, 12-bit, 125-ksps analog-to-digital converter (ADC) that can be used as a drop-in replacement for the Analog Devices AD7887.

Priced at $1.25 in 1,000-piece quantities, the new Touchstone TSA7887 is $3 less expensive, pin-compatible, specification-identical, and functionally identical to the Analog Devices' AD7887. Touchstone now offers a total of 17 parts from Maxim and Analog Devices in its alternate-source analog IC family.

Touchstone's alternate-source parts are drop-in replacements that can be used in conjunction with the original manufacturer's ICs. Replacement parts ensure electronics companies have access to a constant supply of parts to build their products. All Touchstone alternate-source analog ICs are in stock and available to ship immediately.


·     $1.25 price at 1k-piece quantities -- $3 lower than the AD7887.

·     2.6-mW power consumption at 125ksps while operating from a single +2.7V to +5.25V.

·     Four user-programmable, low-power operating modes including auto standby and auto power down.

·     Two INL options: TSA7887B with ±1LSB INL and TSA7887A with ±2LSB INL.

·     -40°C to +125°C operating temperature.

·     One or two analog inputs each with an input range from 0V to VREF or 0V to VDD.

·     An integrated 2.5V reference.

The TSA7887 is an ideal choice as 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 TSA7887 include: optical sensors, touch panels, personal digital assistants, programmable logic controllers, and medical instrumentation.

The TSA7887 is available in 8-pin SOIC and MSOP packages and is fully specified from -40ºC to +125ºC 

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