ADS7951 12 bit, 1 MSPS, 8 Channel, Single-Ended, SAR ADC |

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12 bit, 1 MSPS, 8 Channel, Single-Ended, SAR ADC


Automotive AEC-Q100 Grade 1 qualified version available, see ADS7951-Q1.


The ADS79xx is a 12-, 10-, 8-bit pin compatible multichannel analog-to-digital converter family. The device comparison table shows all twelve devices from this product family.

The devices include a capacitor based SAR A/D converter with inherent sample and hold.

The devices accept a wide analog supply range from 2.7 V to 5.25 V. Very low power consumption makes these devices suitable for battery-powered and isolated power-supply applications.

A wide 1.7-V to 5.25-V I/O supply range facilitates a glueless interface with the most commonly used digital hosts. The serial interface is controlled by CS and SCLK for easy connection with microprocessors and DSP.

The input signal is sampled with the falling edge of CS. It uses SCLK for conversion, serial data output, and reading serial data in. The devices allow auto sequencing of preselected channels or manual selection of a channel for the next conversion cycle.

There are two software selectable input ranges (0 V to VREF and 0 V to 2 × VREF), individually configurable GPIOs (four in case of the TSSOP and one on the VQFN package devices), and two programmable alarm thresholds per channel. These features make the devices suitable for most data acquisition applications.

The devices offer an attractive power-down feature. This is extremely useful for power saving when the device is operated at lower conversion speeds.

The 16-, 12-channel devices from this family are available in a 38-pin TSSOP and 32 pin VQFN package and the 4/8-channel devices are available in a 30-pin TSSOP and 24 pin VQFN packages.


  • 1-MHz Sample Rate Serial Devices
  • Product Family of 12-, 10-, 8-Bit Resolution
  • Zero Latency
  • 20-MHz Serial Interface
  • Analog Supply Range: 2.7 to 5.25 V
  • I/O Supply Range: 1.7 to 5.25 V
  • Two SW Selectable Unipolar, Input Ranges: 0 to VREF and 0 to 2 x VREF
  • Auto and Manual Modes for Channel Selection
  • 4-, 8-Channel Devices and 12-, 16-Channel Devices Share the Same Footprint
  • Two Programmable Alarm Levels per Channel
  • Four Individually Configurable GPIOs in TSSOP Package: One GPIO in VQFN Package
  • Typical Power Dissipation: 14.5 mW (+VA = 5 V, +VBD = 3 V) at 1 MSPS
  • Power-Down Current (1 µA)
  • Input Bandwidth (47 MHz at 3 dB)
  • 38-, 30-Pin TSSOP and 32-, 24-Pin VQFN Packages

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WEBENCH® Designer ADS7951


Compare all products in Precision ADCs (<=10MSPS) Email Download to Excel
Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) SNR (dB) THD (Typ) (dB) Rating
ADS7951 Order now 12     1000     8     SPI     -40 to 125     TSSOP | 30
VQFN | 24    
2.70 | 1ku     11.5     30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
SAR     Single-Ended     Multiplexed     Ext         5.25     0     2.7     5.25     1.7     5.25     1     71.7     -82     Catalog    
ADC128D818 Order now 12     0.082     8     I2C     -40 to 125     TSSOP | 16     1.95 | 1ku     2     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Pseudo-Differential
Multiplexed     Ext
Temp Sensor    
5.5     0     3     5.5     3     5.5     1         Catalog    
ADS7028 Order now 12     1000     8     Enhanced SPI     -40 to 85     WQFN | 16     2.70 | 1ku       16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     SAR     Single-Ended     Multiplexed     Supply     Digital Window Comparator
Small Size    
5.5     0     2.35     5.5     1.65     5.5     2     69       Catalog    
ADS7038 Order now 12     1000     8     Enhanced SPI