ADS7863A Dual, 2MSPS, 12-Bit, 2+2 or 3+3 Channel, Simultaneous Sampling SAR ADC |


Dual, 2MSPS, 12-Bit, 2+2 or 3+3 Channel, Simultaneous Sampling SAR ADC



The ADS7863A is a dual, 12-bit, 2-MSPS, analog-to-digital converter (ADC) with four fully-differential or six pseudo-differential input channels grouped into two pairs for high-speed, simultaneous signal acquisition. Inputs to the sample-and-hold (S/H) amplifiers are fully differential and are maintained differential to the ADC input. This architecture provides excellent common-mode rejection of 72 dB at 100 kHz, which is a critical performance characteristic in noisy environments.

The device is pin-compatible with the ADS7861, but offers additional features such as a programmable reference output, flexible supply voltage (2.7 V to 5.5 V for AVDD and BVDD), a pseudo-differential input multiplexer with three channels per ADC, and several power-down features.

The device is offered in an SSOP-24 and a 4-mm × 4-mm QFN-24 package. The device is specified over the extended operating temperature range of –40°C to +125°C.


  • Four Fully- or Six Pseudo-Differential Inputs
  • SNR: 71 dB
  • THD: –81 dB
  • Programmable and Buffered Internal 2.5-V Reference
  • Flexible Power-Down Features
  • Variable Power-Supply Ranges: 2.7 V to 5.5 V
  • Low-Power Operation: 45 mW at 5 V
  • Operating Temperature Range:
    –40°C to +125°C
  • Pin-Compatible with the ADS7861 and ADS8361 (SSOP Package)


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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
ADS7863A Order now 12     2000     4     SPI     -40 to 125     SSOP | 24
VQFN | 24    
5.55 | 1ku     35.5     24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
SAR     Differential
Simultaneous Sampling     Ext
5.6     -0.1     2.7     5.5     2.7     5.5     1     71.5     -81     Catalog