12 bit, 1 MSPS, 4 ch, single ended, micro power, sr i/f, SAR ADC - ADS7950

ADS7950 (ACTIVE)

12 bit, 1 MSPS, 4 ch, single ended, micro power, sr i/f, SAR ADC

Recommended alternative parts

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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 2.7V to 5.25V. Very low power consumption makes these devices suitable for battery-powered and isolated power supply applications.

A wide 1.7V to 5.25V 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 (0V - 2.5V and 0V - 5V), 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 QFN package and the 4/8-channel devices are available in a 30-pin TSSOP and 24 pin QFN 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 5.25V
  • I/O Supply Range: 1.7 to 5.25V
  • Two SW Selectable Unipolar, Input Ranges: 0 to 2.5V and 0 to 5V
  • 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 = 5V, +VBD = 3V) at 1 MSPS
  • Power-Down Current (1 µA)
  • Input Bandwidth (47 MHz at 3dB)
  • 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

View more

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

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Interface
SNR (dB)
SINAD (dB)
Reference Mode
Architecture
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
Integrated Features
ADS7950 ADS7951 ADS7952 ADS7953 ADS7954 ADS7955 ADS7955-Q1 ADS7956 ADS7957 ADS7958 ADS7959 ADS7960 ADS7961 ADS8634 ADS8638
12     12     12     12     10     10     10     10     10     8     8     8     8     12     12    
1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS     1MSPS    
4     8     12     16     4     8     8     12     16     4     8     12     16     4     8    
Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial     Serial    
71.7     71.7     71.7     71.7     60     60     60     60     60     49     49     49     49     71.8     71.8    
71.3     71.3     71.3     71.3     60     60     60     60     60     49     49     49     49     71.3     71.3    
Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext     Ext
Int    
Ext
Int    
SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-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     -40 to 125     -40 to 125     -40 to 125    
24VQFN
30TSSOP    
24VQFN
30TSSOP    
32VQFN
38TSSOP    
32VQFN
38TSSOP    
24VQFN
30TSSOP    
24VQFN
30TSSOP    
30TSSOP     32VQFN
38TSSOP    
32VQFN
38TSSOP    
24VQFN
30TSSOP    
24VQFN
30TSSOP    
32VQFN
38TSSOP    
32VQFN
38TSSOP    
24VQFN     24VQFN    
2.10 | 1ku     2.70 | 1ku     3.35 | 1ku     4.05 | 1ku     1.90 | 1ku     2.45 | 1ku     3.20 | 1ku     3.00 | 1ku     3.55 | 1ku     1.15 | 1ku     1.50 | 1ku     1.85 | 1ku     2.25 | 1ku     2.85 | 1ku     3.25 | 1ku    
  GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     GPIOs     Comparator
Temp Sensor    
Comparator
Temp Sensor    

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