Home Data converters Analog-to-digital converters (ADCs) Precision ADCs
Home
Data converters
Analog-to-digital converters (ADCs)
Precision ADCs

ADS7040

ACTIVE

Ultra-low-power, ultra-small-size SAR ADC, 8 bit, 1 MSPS, single ended

Order now
Data sheet

ADS7040

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 8 Sample rate (max) (ksps) 1000 Number of input channels 1 Interface type SPI Architecture SAR Input type Single-ended Rating Catalog Reference mode Supply Input voltage range (max) (V) 3.6 Input voltage range (min) (V) 0 Features Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 0.171 Analog supply voltage (min) (V) 1.65 Analog supply voltage (max) (V) 3.6 SNR (dB) 49 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 8 Sample rate (max) (ksps) 1000 Number of input channels 1 Interface type SPI Architecture SAR Input type Single-ended Rating Catalog Reference mode Supply Input voltage range (max) (V) 3.6 Input voltage range (min) (V) 0 Features Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 0.171 Analog supply voltage (min) (V) 1.65 Analog supply voltage (max) (V) 3.6 SNR (dB) 49 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
VSSOP (DCU) 8 6.2 mm² (2 mm × 3.1 mm) X2QFN (RUG) 8 2.25 mm² (1.5 mm × 1.5 mm)
  • Industry’s First SAR ADC with Nanowatt Power Consumption:
    • 171 µW at 1 MSPS with 1.8-V AVDD
    • 555 µW at 1 MSPS with 3-V AVDD
    • 56 µW at 100 kSPS with 3-V AVDD
    • Less than 1 µW at 1 kSPS with 3-V AVDD
  • Industry’s Smallest SAR ADC:
    • X2QFN-8 Package with 2.25-mm2 Footprint
  • 1-MSPS Throughput with Zero Data Latency
  • Wide Operating Range:
    • AVDD: 1.65 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V (Independent of AVDD)
    • Temperature Range: –40°C to 125°C
  • Excellent Performance:
    • 8-Bit Resolution with NMC
    • ±0.5-LSB (Max) INL, ±0.4-LSB (Max) DNL
    • 49 dB SNR
    • –70-dB THD
  • Unipolar Input Range: 0 V to AVDD
  • Integrated Offset Calibration
  • SPI™-Compatible Serial Interface: 12 MHz
  • JESD8-7A Compliant Digital I/O
  • Industry’s First SAR ADC with Nanowatt Power Consumption:
    • 171 µW at 1 MSPS with 1.8-V AVDD
    • 555 µW at 1 MSPS with 3-V AVDD
    • 56 µW at 100 kSPS with 3-V AVDD
    • Less than 1 µW at 1 kSPS with 3-V AVDD
  • Industry’s Smallest SAR ADC:
    • X2QFN-8 Package with 2.25-mm2 Footprint
  • 1-MSPS Throughput with Zero Data Latency
  • Wide Operating Range:
    • AVDD: 1.65 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V (Independent of AVDD)
    • Temperature Range: –40°C to 125°C
  • Excellent Performance:
    • 8-Bit Resolution with NMC
    • ±0.5-LSB (Max) INL, ±0.4-LSB (Max) DNL
    • 49 dB SNR
    • –70-dB THD
  • Unipolar Input Range: 0 V to AVDD
  • Integrated Offset Calibration
  • SPI™-Compatible Serial Interface: 12 MHz
  • JESD8-7A Compliant Digital I/O

The ADS7040 is a 8-bit, 1-MSPS, analog-to-digital converter (ADC). The device supports a wide analog input voltage range (1.65 V to 3.6 V) and includes a capacitor-based, successive-approximation register (SAR) ADC with an inherent sample-and-hold circuit. The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with the CS falling edge and SCLK is used for conversion and serial data output. The device supports a wide digital supply range (1.65 V to 3.6 V), enabling direct interface to a variety of host controllers. The ADS7040 complies with the JESD8-7A standard for a normal DVDD range (1.65 V to 1.95 V).

The ADS7040 is available in 8-pin, miniature, leaded, and X2QFN packages and is specified for operation from –40°C to 125°C. Miniature form-factor and extremely low-power consumption make this device suitable for space-constrained, battery-powered applications.

The ADS7040 is a 8-bit, 1-MSPS, analog-to-digital converter (ADC). The device supports a wide analog input voltage range (1.65 V to 3.6 V) and includes a capacitor-based, successive-approximation register (SAR) ADC with an inherent sample-and-hold circuit. The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with the CS falling edge and SCLK is used for conversion and serial data output. The device supports a wide digital supply range (1.65 V to 3.6 V), enabling direct interface to a variety of host controllers. The ADS7040 complies with the JESD8-7A standard for a normal DVDD range (1.65 V to 1.95 V).

The ADS7040 is available in 8-pin, miniature, leaded, and X2QFN packages and is specified for operation from –40°C to 125°C. Miniature form-factor and extremely low-power consumption make this device suitable for space-constrained, battery-powered applications.
filter Find other Precision ADCs
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device.
ADS7041 ACTIVE Ultra-low power and ultra-small size SAR ADC, 10 bit, 1 MSPS, single ended Higher resolution (10-bit)
ADS7042 ACTIVE 12-Bit 1MSPS Ultra-Low-Power Ultra-Small-Size SAR ADC With SPI Interface Higher resolution (12-bit)

Technical documentation

No results found. Please clear your search and try again.
View all 12
Top documentation Type Title Format options Date
* Data sheet ADS7040 Ultra-Low Power, Ultra-Small Size, 8-Bit, 1-MSPS, SAR ADC datasheet (Rev. C) PDF | HTML Dec 10, 2015
Technical article A Method for Isolated Voltage Sampling Using ADS7040 and General-Purpose Optocouplers PDF | HTML Jan 21, 2026
Application brief Precision ADCs in Servo Drives (Rev. A) PDF | HTML Oct 29, 2025
Analog design Journal Low-power sensor measurements: 3.3-V, 1-ksps, 12-bit, single-ended, single-suppl (Rev. B) PDF | HTML Sep 26, 2024
Circuit design Driving a SAR ADC directly without a front-end buffer circuit (Rev. B) PDF | HTML Sep 23, 2024
Circuit design High-side current shunt monitor circuit to 3-V single-ended ADC (Rev. A) PDF | HTML Sep 20, 2024
Circuit design Low-power sensor measurements: 3.3-V, 1-ksps, 12-bit, single-ended, dual-supply (Rev. B) PDF | HTML Sep 17, 2024
Product overview Bridge Sensor Solution (Rev. A) PDF | HTML Jan 27, 2023
Application brief Optimized Sensor Measurement: Driving a SAR ADC Input Without a Driver Amplifier PDF | HTML Sep 1, 2017
Application note Low-Cost, Low-Power, Small 14-bit AFE: Interleaved ADCs Scalable up to 7.5 MSPS May 26, 2017
Technical article 3 ways to scale an analog input signal PDF | HTML Sep 20, 2016
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

ADS7042EVM-PDK — ADS7042 Ultra-Low-Power Ultra-Small-Size 12-Bit 1MSPS SAR ADC Performance Demonstration Kit (PDK)

The ADS7042 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the 12-bit, ADS7042 successive approximation register (SAR) analog-to-digital converter (ADC).

The PDK includes the ADS7042 evaluation board, precision host interface (PHI) controller board, and (...)

User guide: PDF | HTML
Supported products & hardware
In stock
Limit:
??asset.out-of-stock-ti_en_US??
Not available
Evaluation board

BOOST-ADS7042 — ADS7042 Ultra-Low Power Data Acquisition BoosterPack

The ADS7042 Ultra-Low Power Data Acquisition BoosterPack is a stand-alone system that converts analog sensor data into digital SPI data using the TI ADS7042 Successive Approximation Register Analog-to-Digital Converter.  This BoosterPack has been designed to be compatible with the TI (...)

Supported products & hardware
In stock
Limit:
??asset.out-of-stock-ti_en_US??
Not available
Simulation model

ADS7040 TINA-TI Reference Design

SBAM242.TSC (225 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

ADS7042 IBIS Model

SBAM196.ZIP (26 KB) - IBIS model
Supported products & hardware
Simulation model

Bridge Sensor Solution TINA-TI Reference Design

SBOMC56.ZIP (68 KB) - TINA-TI reference design
Supported products & hardware
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 (...)

Supported products & hardware
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.
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
VSSOP (DCU) 8 Ultra Librarian
X2QFN (RUG) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos