ADS7947SRTER

The ADS7947SRTER is a high-performance 12-bit, 2 MSPS successive approximation register (SAR) analog-to-digital converter (ADC) from Texas Instruments. It features two pseudo-differential input channels with a multiplexed front-end configuration, providing flexibility for multi-signal acquisition systems. The device achieves excellent linearity with an INL of ±1 LSB maximum and a signal-to-noise ratio (SNR) of 73 dB typical.

Operating from a wide analog supply range of 2.7 V to 5.5 V and a digital supply range of 1.65 V to 5.5 V, the ADS7947SRTER is designed for low-power applications. It consumes only 7.5 mW at full 2 MSPS throughput and features automatic power-down at lower sampling rates, reducing power to 3.8 mW at 500 kSPS and 0.16 mW at 20 kSPS. The device communicates via a standard SPI-compatible serial interface.

The ADC is housed in a compact 16-pin WQFN package measuring 3 mm × 3 mm, making it suitable for space-constrained designs. It operates over an extended industrial temperature range of -40°C to 125°C. The ADS7947 is part of a pin-compatible family that includes 10-bit and 8-bit variants (ADS7948 and ADS7949), allowing easy scalability in resolution without PCB redesign.