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ADS7955-Q1

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

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Data sheet

ADS7955-Q1

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 10 Sample rate (max) (ksps) 1000 Number of input channels 8 Interface type SPI Architecture SAR Input type Single-ended Multichannel configuration Multiplexed Rating Automotive TI functional safety category Functional Safety-Capable Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 11.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 60 Digital supply (min) (V) 1.7 Digital supply (max) (V) 5.25
Resolution (Bits) 10 Sample rate (max) (ksps) 1000 Number of input channels 8 Interface type SPI Architecture SAR Input type Single-ended Multichannel configuration Multiplexed Rating Automotive TI functional safety category Functional Safety-Capable Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 11.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 60 Digital supply (min) (V) 1.7 Digital supply (max) (V) 5.25
TSSOP (DBT) 30 49.92 mm² (7.8 mm × 6.4 mm)
  • 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
  • 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

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.

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.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet 10-Bit, 1 MSPS, 8Channel, Single-Ended, MicroPower, Serial Interface ADC datasheet Dec 16, 2011
Functional safety information ADS7955-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML Oct 16, 2020
Application brief Temperature Monitoring in HEV and EV Traction Inverter Systems Using ADS795x-Q1 Jun 28, 2018
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ADS7953EVM-PDK — ADS7953 performance demonstration kit

The ADS7953EVM-PDK is an evaluation platform for the ADS7953 device, which is a 12-bit, 16-channel, 1-MSPS, single-ended analog input, successive approximation register (SAR) analog-to-digital converter (ADC) that features an easy-to-use serial programming interface (SPI). The ADS7953EVM-PDK eases (...)

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Support software

ADS7953-MSPM0-EXAMPLE-CODE — ADS7953 and MSPM0 code example

Expedite your embedded design using this example code for the ADS975x product family
Supported products & hardware
Simulation model

ADS795x Family IBIS Model

SBAM022.ZIP (67 KB) - IBIS model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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Design tool

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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TSSOP (DBT) 30 Ultra Librarian
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