ADS7955-Q1 Automotive 10 bit, 1 MSPS, 8 Channel, Single-Ended, SAR ADC | TI.com

ADS7955-Q1 (ACTIVE)

Automotive 10 bit, 1 MSPS, 8 Channel, Single-Ended, SAR ADC

 

Description

The ADS7955-Q1 is a 10-bit multichannel analog-to-digital converter.

The device includes a capacitor based SAR A/D converter with inherent sample and hold.

The device accepts a wide analog supply range from 2.7V to 5.25V. Very low power consumption makes this device 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 device allows 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, and two programmable alarm thresholds per channel. These features make the device suitable for most data acquisition applications.

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

Features

  • Qualified for Automotive Applications
  • 1-MHz Sample Rate Serial Devices
  • 10-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 2.5V and 0 to 5V
  • Auto and Manual Modes for Channel Selection
  • 8-Channel Device can Share 16 Channel Device Footprint
  • Two Programmable Alarm Levels per Channel
  • Four Individually Configurable GPIOs for TSSOP Package Devices
  • Typical Power Dissipation: 14.5 mW (+VA = 5 V, +VBD = 3 V) at 1 MSPS
  • Power-Down Current (1 µA)
  • Input Bandwidth (47 MHz at 3 dB)
  • 30-Pin TSSOP Package

WEBENCH® Designer ADS7955-Q1



Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of 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) SNR (dB) THD (Typ) (dB) Rating
ADS7955-Q1 Order now 10     1000     8     SPI     -40 to 125     TSSOP | 30     3.19 | 1ku     11.5     30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)     SAR     Single-Ended     Multiplexed     Ext    
   
5.25     0     2.7     5.25     1.7     5.25     0.5     60     -80     Automotive    
ADS7950 Order now 12     1000     4     SPI     -40 to 125     TSSOP | 30
VQFN | 24    
2.30 | 1ku     11.5     30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
SAR     Single-Ended     Multiplexed     Ext    
   
5.25     0     2.7     5.25     1.7     5.25     1     71.7     -82     Catalog    
ADS7952 Order now 12     1000     12     SPI     -40 to 125     TSSOP | 38
VQFN | 32    
3.33 | 1ku     11.5     38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
SAR     Single-Ended     Multiplexed     Ext    
   
5.25     0     2.7     5.25     1.7     5.25     1     71.7     -82