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

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
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)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADS7865
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    
N/A    
5.5    
0    
2.7    
5.5    
2.7    
5.5    
1    
71.3    
71.7    
-87    
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