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

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

 
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)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADS7955-Q1 ADS7950 ADS7952 ADS7953 ADS7954 ADS7955 ADS7956 ADS7957 ADS7958 ADS7959 ADS7960 ADS7961
10     12     12     12     10     10     10     10     8     8     8     8    
1000     1000     1000     1000     1000     1000     1000     1000     1000     1000     1000     1000    
8     4     12     16     4     8     12     16     4     8     12     16    
SPI     SPI     SPI     SPI     SPI     SPI     SPI     SPI     SPI     SPI     SPI     SPI    
-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    
TSSOP | 30     TSSOP | 30
VQFN | 24    
TSSOP | 38
VQFN | 32    
TSSOP | 38
VQFN | 32    
TSSOP | 30
VQFN | 24    
TSSOP | 30
VQFN | 24    
TSSOP | 38
VQFN | 32    
TSSOP | 38
VQFN | 32    
TSSOP | 30
VQFN | 24    
TSSOP | 30
VQFN | 24    
TSSOP | 38
VQFN | 32    
TSSOP | 38
VQFN | 32    
3.19 | 1ku     2.30 | 1ku     3.33 | 1ku     4.01 | 1ku     2.10 | 1ku     2.43 | 1ku     2.97 | 1ku     3.51 | 1ku     1.13 | 1ku     1.49 | 1ku     1.85 | 1ku     2.21 | 1ku    
11.5     11.5     11.5     11.5     11.5     11.5     11.5     11.5     11.5     11.5     11.5     11.5    
30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)     30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
38TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 38)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
SAR     SAR