TSA7887: A MICROPOWER, 2-CHANNEL, 125-KSPS, SERIAL-OUTPUT 12-BIT SAR ADC

DESCRIPTION

The TSA7887 – a pin compatible, specification identical alternate source for the AD7887 – is a self-contained, 2-channel, high-speed, micropower, 12-bit analog-to-digital converter (ADC) that operates from a single +2.7V to +5.25V power supply. The TSA7887 is capable of 125-ksps throughput rate with an external 2MHz serial clock and draws 0.85mA supply current. Two electrical grade options for the TSA7887 are available: the TSA7887A with ±2LSB (max) INL and the TSA7887B with ±1LSB (max) INL.

The wideband input track-and-hold acquires signals in 500ns and features a single-ended sampling topology. Output data coding is straight binary and the ADC is capable of converting full power signals of up to 2.5 MHz. The ADC also contains an internal 2.5V reference or the VREF pin can be overdriven by an external reference.
The TSA7887’s provides one or two analog inputs each with an analog input range from 0 to VREF. Efficient circuit design ensures low power consumption of 2mW (typical) for normal operation and 3μW in power-down operation.
The TSA7887 is fully specified from -40ºC to +125ºC and is available in 8-pin SOIC (both TSA7887A and TSA7887B) and MSOP (TSA7887A only) packages.

^{Download Full Block Diagram Below}