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

SAR ADC, Dual, 1.5 MSPS, 14 Bit, Simultaneous Sampling - ADS7851
 

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)

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

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
# 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
Sample Rate (Max) (MSPS)
ADS7851 ADS7251 ADS7254 ADS7854 ADS8354
14     12     12     14     16    
1500     2000     1000     1000     700    
2     2     2     2     2    
SPI     SPI     SPI     SPI     SPI    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
WQFN     WQFN     TSSOP
WQFN    
TSSOP
WQFN    
TSSOP
WQFN    
7.00 | 1ku     4.50 | 1ku     4.00 | 1ku     6.50 | 1ku     9.50 | 1ku    
55     55     45     45     45    
16WQFN: 9 mm2: 3 x 3(WQFN)     16WQFN: 9 mm2: 3 x 3(WQFN)     16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16WQFN: 9 mm2: 3 x 3(WQFN)    
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16WQFN: 9 mm2: 3 x 3(WQFN)    
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16WQFN: 9 mm2: 3 x 3(WQFN)    
SAR     SAR     SAR     SAR     SAR    
Differential     Differential     Differential     Differential     Differential    
Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling    
Int     Int     Ext
Int    
Ext
Int    
Ext
Int    
N/A     N/A     N/A     N/A     N/A    
5.25     5.25     5.5     5.5     5.5    
0     0     0     0     0    
4.75     4.75     4.5     4.5     4.5    
5.25     5.25     5.5     5.5     5.5    
1.65     1.65     1.65     1.65     1.65    
5.25     5.25     5.5     5.5     5.5    
2     1     1     1.5     2.5    
82.6     72.9     73.9     84.6     92.2    
83.5     73     74     85     93    
-90     -90     -92     -98     -100    
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