ADS7865 Dual, 2MSPS, 12-Bit, 3+3 or 2+2 Channel, Simultaneous Sampling ADC | TI.com

ADS7865 (ACTIVE)

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

 

Description

The ADS7865 is a dual, 12-bit, 2MSPS 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 differentially to the input of the ADC. This architecture provides excellent common-mode rejection of 72dB at 100kHz, which is a critical performance characteristic in noisy environments.

The ADS7865 is pin-compatible with the ADS7862, but offers additional features such as a programmable channel sequencer and reference output, flexible supply voltage (2.7V to 5.5V for AVDD and BVDD), a pseudo-differential input multiplexer with three channels per ADC, and several power-down features.

The ADS7865 is offered in a TQFP-32 package. It is specified over the extended operating temperature range of –40°C to +125°C.

Features

  • Six Pseudo- or Four Fully Differential Inputs
  • SNR: 71.7dB, THD: –87dB
  • Programmable Channel Sequencer
  • Programmable and Buffered Internal 2.5V Reference
  • Flexible Power-Down Features
  • Variable Power-Supply Ranges: 2.7V to 5.5V
  • Low-Power Operation: 44mW Maximum at 5V
  • Operating Temperature Range:
    –40°C to +125°C
  • Pin-Compatible Upgrade for the ADS7862

Parametrics

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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
ADS7865 Order now 12     2000     6     Parallel     -40 to 125     TQFP | 32     4.90 | 1ku     30     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     SAR     Differential
Pseudo-Differential    
Multiplexed     Ext
Int    
   
5.5     0     2.7     5.5     2.7     5.5     1     71.7     -87     Catalog