14-Bit 2.5MSPS Ultra-Low-Power Ultra-Small-Size SAR ADC With SPI Interface - ADS7056

ADS7056 (ACTIVE)

14-Bit 2.5MSPS Ultra-Low-Power Ultra-Small-Size SAR ADC With SPI Interface

 

Description

The ADS7056 is a 14-bit, 2.5-MSPS, analog-to-digital converter (ADC). The device includes a capacitor-based, successive-approximation register (SAR) ADC that supports a wide analog input voltage range (0 V to AVDD, for AVDD in the range of 2.35 V to 3.6 V).

The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with the CS falling edge and SCLK is used for conversion and serial data output. The device supports a wide digital supply range (1.65 V to 3.6 V), enabling direct interfacing to a variety of host controllers. The ADS7056 complies with the JESD8-7A standard for a normal DVDD range (1.65 V to 1.95 V).

The ADS7056 is available in an 8-pin, miniature, X2QFN package and is specified over the extended industrial temperature range (–40°C to +125°C). Miniature form-factor and extremely low-power consumption make this device suitable for space-constrained and battery-powered applications.

Features

  • 2.5-MSPS Throughput
  • Ultra-Small Size SAR ADC:
    • X2QFN-8 Package with 2.25-mm2 Footprint
  • Wide Operating Range:
    • AVDD: 2.35 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V (Independent of AVDD)
    • Temperature Range: –40°C to +125°C
  • Unipolar Input Range: 0 V to AVDD
  • Excellent Performance:
    • 14-Bit NMC DNL, ±2-LSB INL
    • 74.5-dB SINAD at 2-kHz
    • 73.7-dB SINAD at 1-MHz
  • Ultra-Low Power Consumption:
    • 3.5 mW at 2.5-MSPS with 3.3-V AVDD
    • 158 µW at 100-kSPS with 3.3-V AVDD
  • Integrated Offset Calibration
  • SPI-Compatible Serial Interface: 60-MHz
  • JESD8-7A Compliant Digital I/O

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

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Interface
Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
THD (Typ) (dB)
SNR (dB)
Reference Mode
ADS7056 ADS7042 ADS7142 ADS7279 ADS7890 ADS7891 ADS7924
14    12    12
16   
14    14    14    12   
2500000    1000000    140000    1000000    1250000    3000000    100000   
1    1    2    1    1    1    4   
Single-Ended    Single-Ended    Pseudo-Differential
Single-Ended   
Pseudo-Differential
Single-Ended   
Pseudo-Differential
Single-Ended   
Pseudo-Differential
Single-Ended   
Single-Ended   
3.5    0.234    0.0009    13.7    45    85    0.5   
0    0    0    0    0    0    0   
3.6    3.6    3.6    5.5    2.6    2.5    5.5   
SPI    SPI    I2C    Serial    SPI    Parallel    I2C   
N/A    N/A    Comparator
Oscillator   
Daisy-Chainable
Oscillator   
Oscillator    Oscillator    Oscillator   
2.35    1.65    1.65    2.7    4.75    4.75    2.2   
3.6    3.6    3.6    5.5    5.25    5.25    5.5   
SAR    SAR    SAR    SAR    SAR    SAR    SAR   
-40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
8X2QFN    8VSSOP
8X2QFN   
10X2QFN    16QFN
16TSSOP   
48TQFP    48TQFP    16WQFN   
-85    -80    -80    -100.1    -95    -93    N/A   
74.9    70    71.5    85.9    78    78.5     
Supply    Supply    Supply    Ext    Ext
Int   
Ext
Int   
Supply