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ADS7038-Q1

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Automotive, 8-channel, 1-MSPS, 12-bit analog-to-digital converter (ADC) with SPI, GPIOs and CRC

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Product details

Parameters

Resolution (Bits) 12 Number of input channels 8 Sample rate (Max) (kSPS) 1000 Interface type SPI Architecture SAR Input type Single-Ended Multi-channel configuration Multiplexed Rating Automotive Reference mode Supply Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Comparator, Digital Window Comparator, GPIO, Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 1.5 Analog voltage AVDD (Min) (V) 2.35 SNR (dB) 72.9 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 2 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Small package size:
    • WQFN 3 mm × 3 mm
    • Wettable flanks for visual inspection of solder joints
  • 8 channels configurable as any combination of:
    • Up to 8 analog inputs, digital inputs, or digital outputs
  • GPIOs for I/O expansion:
    • Open-drain, push-pull digital outputs
  • Analog watchdog:
    • Programmable thresholds per channel
    • Event counter for transient rejection
  • Wide operating ranges:
    • AVDD: 2.35 V to 5.5 V
    • DVDD: 1.65 V to 5.5 V
  • Enhanced-SPI digital interface:
    • High-speed, 60-MHz interface
  • CRC for read/write operation:
    • CRC on data read/write
    • CRC on power-up configuration
  • Programmable averaging filters:
    • Programmable sample size for averaging
    • Averaging with internal conversions
    • 16-bit resolution
  • Turbo comparator mode with speeds up to3.2 MSPS

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Description

The ADS7038-Q1 is an easy-to-use, 8-channel, multiplexed, 12-bit, 1-MSPS, successive approximation register analog-to-digital converter (SAR ADC). The eight channels can be independently configured as either analog inputs, digital inputs, or digital outputs. The device has an internal oscillator for the ADC conversion process.

The ADS7038-Q1 communicates through an SPI-compatible interface and operates in either autonomous or single-shot conversion mode. The ADS7038-Q1 implements the analog watchdog function by event-triggered interrupts per channel using a digital window comparator with programmable high and low thresholds, hysteresis, and an event counter. The ADS7038-Q1 has a built-in cyclic redundancy check (CRC) for data read/write operations and the power-up configuration.

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Technical documentation

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Type Title Date
* Data sheet ADS7038-Q1 Small, 8-Channel, 12-Bit ADC With SPI Interface, GPIOs, and CRC datasheet (Rev. A) Nov. 04, 2020
User guide ADS7038Q1EVM-PDK Evaluation Module User's Guide Oct. 09, 2020
Technical article How an automotive ADC can help designers achieve functional safety in ADAS Jun. 09, 2020
User guide BP-ADS7128 BoosterPack™ Plug-In Module User's Guide May 21, 2019

Design & development

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

Hardware development

EVALUATION BOARD Download
Description

The ADS7038-Q1 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS7038-Q1 successive approximation register (SAR) analog-to-digital converter (ADC). ADS7038Q1EVM-PDK provides power and a communications card to easily connect to the (...)

Features
  • USB powered; no external power supply required
  • Includes a precision ADC motherboard (PAMBoard) that provides a convenient communication interface over a USB for power delivery and digital interface
  • Easy-to-use evaluation software for Microsoft® Windows® 7/8/10 64-bit operating systems (...)

Software development

SUPPORT SOFTWARE Download
SBAC294.ZIP (789 KB)

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOL Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
CALCULATION TOOL Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

Package Pins Download
WQFN (RTE) 16 View options

Ordering & quality

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  • Ongoing reliability monitoring

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