Date: 04/11/2010

2-channel, 2MSPS, SAR ADCs from TI for portable data acquisition

Texas Instruments Incorporated (TI) has launched three new successive approximation register (SAR) analog-to-digital converters (ADCs) ADS7947, ADS7948 and ADS7949, which offer 2-MSPS and 2-channel data conversion at 12-, 10-, and 8-bit resolution.
These ADCs are suggested for use in analog front-end stage in apps such as portable data acquisition, X-Y positioning, battery monitoring, and instrumentation and control.

Key features and benefits:
Deliver 72 dB of signal to noise ratio (SNR) at 7.5 mW power consumption.
Offers power scaling down to 8 uW/kSPS for data rates under 500 kSPS, extending the battery life of portable devices.
Pseudo-differential inputs reduce the need for additional common-mode signal-conditioning circuitry, and precision offset and gain over temperature eliminate calibration over temperature, saving system cost and simplifying design.
Operate in the supply range of 2.7 V to 5.5 V, with full-scale input range extending to 5 V, enabling one converter to accommodate both 3.3 V and 5 V applications.
Provides pin-for-pin compatibility between the ADS7947, ADS7948 and ADS7949, making it easy to achieve 12-, 10- and 8-bit resolution flexibility without requiring board or software control changes.

Package: 3-mm x 3-mm WQFN

Price: Starts at US$1.95 for the ADS7947, US$1.70 for the ADS7948 and US$0.99 for the ADS7949 in 1,000-unit quantities.