10 bit, 1 MSPS, 16 Ch, Single Ended, Micro Power, sr i/f, SAR ADC - ADS7957

ADS7957 (ACTIVE)

10 bit, 1 MSPS, 16 Ch, Single Ended, Micro Power, sr i/f, SAR ADC

 

Description

The ADS79xx is a 12/10/8-bit multichannel analog-to-digital converter family. The following table shows all twelve devices from this product family.

The devices include a capacitor based SAR A/D converter with inherent sample and hold.

The devices accept a wide analog supply range from 2.7 V to 5.25 V. Very low power consumption makes these devices suitable for battery-powered and isolated power supply applications.

A wide 1.7-V to 5.25-V I/O supply range facilitates a glue-less interface with the most commonly used CMOS digital hosts.

The serial interface is controlled by CS and SCLK for easy connection with microprocessors and DSP.

The input signal is sampled with the falling edge of CS. It uses SCLK for conversion, serial data output, and reading serial data in. The devices allow auto sequencing of preselected channels or manual selection of a channel for the next conversion cycle.

There are two software selectable input ranges (0 V to 2.5 V and 0 V to 5 V), four individually configurable GPIOs ( in case of TSSOP package devices), and two programmable alarm thresholds per channel. These features make the devices suitable for most data acquisition applications.

The devices offer an attractive power-down feature. This is extremely useful for power saving when the device is operated at lower conversion speeds.

The 16/12-channel devices from this family are available in a 38-pin TSSOP and 32 pin VQFN package and the 4/8-channel devices are available in a 30-pin TSSOP and 24 pin VQFN packages.

Features

  • 1-MHz Sample Rate Serial Devices
  • Product Family of 12/10/8-Bit Resolution
  • Zero Latency
  • 20-MHz Serial Interface
  • Analog Supply Range: 2.7 to 5.25 V
  • I/O Supply Range: 1.7 to 5.25 V
  • Two SW Selectable Unipolar, Input Ranges: 0 to
    2.5 V and 0 to 5 V
  • Auto and Manual Modes for Channel Selection
  • 12, 8, 4-Channel Devices can Share 16 Channel
    Device Footprint
  • Two Programmable Alarm Levels per Channel
  • Four Individually Configurable GPIOs for TSSOP
    package devices. One GPIO for QFN devices
  • Typical Power Dissipation: 14.5 mW (+VA = 5 V,
    +VBD = 3V) at 1 MSPS
  • Power-Down Current (1 µA)
  • Input Bandwidth (47 MHz at 3 dB)
  • 38-,30-Pin TSSOP and 32-,24-Pin QFN Packages
  • APPLICATIONS
    • PLC / IPC
    • Battery Powered Systems
    • Medical Instrumentation
    • Digital Power Supplies
    • Touch Screen Controllers
    • High-Speed Data Acquisition Systems
    • High-Speed Closed-Loop Systems

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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
ADS7957 ADS7950 ADS7952 ADS7953 ADS7954 ADS7955 ADS7955-Q1 ADS7956 ADS7958 ADS7959 ADS7960 ADS7961
10    12    12    12    10    10    10    10    8    8    8    8   
1000000    1000000    1000000    1000000    1000000    1000000    1000000    1000000    1000000    1000000    1000000    1000000   
16    4    12    16    4    8    8    12    4    8    12    16   
Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended    Single-Ended   
11.5    11.5    11.5    11.5    11.5    11.5    11.5    11.5    11.5    11.5    11.5    11.5   
0    0    0    0    0    0    0    0    0    0    0    0   
5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25   
SPI    SPI    SPI    SPI    SPI    SPI    SPI    SPI    SPI    SPI    SPI    SPI   
N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A   
2.7    2.7    2.7    2.7    2.7    2.7    2.7    2.7    2.7    2.7    2.7    2.7   
5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25    5.25   
SAR    SAR    SAR    SAR    SAR    SAR    SAR    SAR    SAR    SAR    SAR    SAR   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
32VQFN
38TSSOP   
24VQFN
30TSSOP   
32VQFN
38TSSOP   
32VQFN
38TSSOP   
24VQFN
30TSSOP   
24VQFN
30TSSOP   
30TSSOP    32VQFN
38TSSOP   
24VQFN
30TSSOP   
24VQFN
30TSSOP   
32VQFN
38TSSOP   
32VQFN
38TSSOP   
-80    -82    -82    -82    -80    -80    -80    -80    -75    -75    -75    -75   
60    71.7    71.7    71.7    60    60    60    60    49    49    49    49   
Ext    Ext    Ext    Ext    Ext    Ext    Ext    Ext    Ext    Ext    Ext    Ext   

Other qualified versions of ADS7957

Version Part Number Definition
Automotive ADS7957-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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