12-Bit, 2 MSPS, Dual Channel, Pseudo-differential uPower Serial SAR ADC


Product details


Resolution (Bits) 12 Number of input channels 2 Sample rate (Max) (kSPS) 2000 Interface type SPI Architecture SAR Input type Pseudo-Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 7.5 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 73 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Precision ADCs (<=10MSPS)


  • 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

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open-in-new Find other Precision ADCs (<=10MSPS)


The ADS7947, ADS7948, and ADS7949 are pin-compatible 12-bit, 10-bit, and 8-bit, 2-MSPS, analog-to-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 short data frame optimized for the number of clocks sufficient for conversion with no drop in performance. The devices feature both outstanding dc precision and excellent dynamic performance. This family of pin-compatible devices includes a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC.

The ADS7947, ADS7948, and ADS7949 support a wide analog supply range that supports the full-scale input range up to 5 V. A simple SPI digital interface, with a digital supply that can operate as low as 1.65 V, allows for easy interfacing to a wide variety of digital controllers. Automatic power-down can be enabled when operating at slower speeds to dramatically reduce power consumption.

Offered in a tiny 3-mm × 3-mm WQFN package, the ADS7947, ADS7948, and ADS7949 are fully specified over the extended temperature range of –40°C to +125°C and are suitable for a wide variety of data acquisition applications where high performance, low power, and small size are key.

open-in-new Find other Precision ADCs (<=10MSPS)

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 4
Type Title Date
* Datasheet ADS794x Ultra-Low Power, 12-, 10-, and 8-Bit, Dual-Channel, SAR ADCs datasheet (Rev. A) Sep. 11, 2019
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015
Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar. 17, 2011
Application note Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) Nov. 10, 2010

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