ADS7948 - Texas Instruments

ADS7948 SAR ADC

The ADS7947, ADS7948, and ADS7949 are pincompatible 12-bit, 10-bit, and 8-bit, 2-MSPS, analogto-digital converters (ADCs), respectively. The devices operate at a 2-MSPS sample rate with a standard 16 clock data frame. In addition, the ADS7947 (12-bit) can be operated at 2.1 MSPS, the ADS7948 (10-bit) at 2.57 MSPS, and the ADS7949 (8-bit) at 3 MSPS with a sho.

Features

•1 Sample rate: 2 MSPS
• Pin-compatible family: 12-, 10-, 8-bit
• High resolution, high throughput:
  – ADS7947: 12 bit, 2.1 MSPS
  – ADS7948: 10 bit, 2.57 MSPS
  – ADS7949: 8 bit, 3 MSPS
• Excellent performance:
  – No missing codes
  – INL: 1 LSB (max)
  – SNR: 72 dB (min)
• Low power:
  – 7.5 mW at 2-MSPS operation
  – Auto power-down at lower speeds:
  – 3.8 mW at 500 kSPS
  – 0.8 mW at 100 kSPS
  – 0.16 mW at 20 kSPS
• Wide supply range:
  – Analog: 2.7 V to 5.5 V
  – Digital: 1.65 V to AVDD
• SPI-compatible serial interface
• Extended temperature range:
  –40°C to +125°C
• Tiny footprint: 3-mm × 3-mm WQFN 2 Applica.