ADS7851 SAR ADC, Dual, 1.5 MSPS, 14 Bit, Simultaneous Sampling | TI.com

ADS7851 (ACTIVE) SAR ADC, Dual, 1.5 MSPS, 14 Bit, Simultaneous Sampling

 

Description

The ADS7251 and ADS7851 belong to a family of pin-compatible, dual, high-speed, simultaneous-sampling, analog-to-digital converters (ADCs) that support fully-differential analog inputs and feature two independent internal voltage references. The ADS7251 offers 12-bit resolution and up to 2-MSPS sampling speed. The ADS7851 offers 14-bit resolution and up to 1.5-MSPS sampling speed.

The devices support a wide digital supply voltage range, allowing easy communication with a variety of digital host controllers using a simple, serial interface. Both devices are fully specified over the extended industrial temperature range (–40°C to +125°C) and are available in a pin-compatible, space-saving, WQFN-16 (3-mm × 3-mm) package.

Features

  • 12- and 14-Bit Pin-Compatible Family
  • Simultaneous Sampling of Two Channels
  • Supports Fully-Differential Analog Inputs
  • Independent Internal Reference (per ADC)
  • High Speed:
    • Up to 2 MSPS with the ADS7251 (12-Bit)
    • Up to 1.5 MSPS with the ADS7851 (14-Bit)
  • Excellent Performance:
    • ADS7251:
      • SNR: 73 dB
      • INL: ±1 LSB
    • ADS7851:
      • SNR: 83.5 dB
      • INL: ±2 LSB
  • Fully-Specified Over the Extended Industrial Temperature Range: –40°C to +125°C
  • Small Footprint: WQFN-16 (3 mm × 3 mm)

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
ADS7851 Order now 14     1500     2     SPI     -40 to 125     WQFN | 16     7.00 | 1ku     55     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     SAR     Differential     Simultaneous Sampling     Int     Small Size     5.25     0     4.75     5.25     1.65     5.25     2     83.5     -90     Catalog    
ADS7251 Order now 12     2000     2     SPI     -40 to 125     WQFN | 16     4.50 | 1ku     55     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     SAR     Differential     Simultaneous Sampling     Int     Small Size     5.25     0     4.75     5.25     1.65     5.25     1     73     -90     Catalog    
ADS7254 Order now 12     1000     2     SPI     -40 to 125     TSSOP | 16
WQFN | 16    
4.00 | 1ku     45     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
SAR     Differential     Simultaneous Sampling     Ext
Int    
Small Size     5.5     0     4.5     5.5     1.65     5.5     1     74     -92     Catalog    
ADS7854 Order now 14     1000     2     SPI     -40 to 125