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

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)

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

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Integrated Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
THD (Typ) (dB)
SNR (dB)
Reference Mode
ADS7851 ADS7251 ADS7254 ADS7854 ADS8354
14    12    12    14    16   
1.5 MSPS    2 MSPS    1MSPS    1MSPS    700kSPS   
2    2    2    2    2   
Differential    Differential    Differential    Differential    Differential   
55    55    45    45    45   
0    0    0    0    0   
5.25    5.25    5.5    5.5    5.5   
N/A    N/A    N/A    N/A    N/A   
4.75    4.75    4.5    4.5    4.5   
5.25    5.25    5.5    5.5    5.5   
SAR    SAR    SAR    SAR    SAR   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
16WQFN    16WQFN    16TSSOP
16WQFN   
16TSSOP
16WQFN   
16TSSOP
16WQFN   
7.00 | 1ku    4.50 | 1ku    4.00 | 1ku    6.50 | 1ku    9.50 | 1ku   
-90    -90    -92    -98    -100   
83.5    73    74    85    93   
Int    Int    Ext
Int   
Ext
Int   
Ext
Int