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   
Catalog    Catalog    Catalog    Catalog    Catalog   
1.5    2    1    1    0.7