ADS7946

ADS7945 ADS7946 www.ti.com SBAS539B – JUNE 2011 – REVISED SEPTEMBER 2011 14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters Check for Samples: ADS7945, ADS7946 FEATURES 1 23 Sample Rate: 2 MSPS 14-Bit, Pin-Compatible with 8/10/12-bit ADS7947/8/9 Family (ADS7946) Outstanding Performance: – SNR: 84 dB (ADS7945) – No Missing Codes – INL: 1.5 LSB (max) (ADS7945) Low Power: – 11.6 mW at 2 MSPS Operation – Auto Power-Down at Lower Speeds: – 7.2 mW at 500 kSPS – 1.4 mW at 100 kSPS – 0.3 mW at 20 kSPS Wide Supply Range: – Analog: 2.7 V to 5.25 V – Digital: 1.65 V to AVDD Simple Serial Interface (SPI) Fully Specified from –40°C to +125°C Tiny Footprint: 3 mm × 3 mm QFN APPLICATIONS Optical Networking Medical Instrumentation Battery-Powered Equipment Data Acquisition Systems DESCRIPTION The ADS7945/6 are 14-bit, 2 MSPS analog-to-digital converters (ADCs), with differential and single-ended inputs, respectively. The devices operate at a 2 MSPS sample rate with a standard 16-clock data frame. The devices feature both outstanding dc precision and excellent dynamic performance; the ADS7946 is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices. The devices include a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC with an inherent sample-and-hold (S/H) input stage. The ADS7945/6 support a wide analog supply range that allows the full-scale input range to extend to ±5 V ...