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ADS131M06

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Six-channel, 24-bit, 32-kSPS, simultaneous-sampling, delta-sigma ADC

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Data sheet

ADS131M06

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Number of input channels 6 Sample rate (Max) (kSPS) 32 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Simultaneous Sampling Rating Catalog Reference mode Ext, Int Input range (Max) (V) 3.6 Input range (Min) (V) -1.3 Features PGA, Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 5 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 101 Analog voltage AVDD (Max) (V) 3.6 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 3.6
Resolution (Bits) 24 Number of input channels 6 Sample rate (Max) (kSPS) 32 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Simultaneous Sampling Rating Catalog Reference mode Ext, Int Input range (Max) (V) 3.6 Input range (Min) (V) -1.3 Features PGA, Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 5 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 101 Analog voltage AVDD (Max) (V) 3.6 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 3.6
TQFP (PBS) 32 49 mm² 7 x 7 WQFN (RSN) 32 16 mm² 4 x 4
  • 6 simultaneously sampling differential inputs
  • Programmable data rate up to 32 kSPS
  • Programmable gain up to 128
  • Noise performance:
    • 102-dB dynamic range at gain = 1, 4 kSPS
    • 80-dB dynamic range at gain = 64, 4 kSPS
  • Total harmonic distortion: –100 dB
  • High-impedance inputs for direct sensor connection:
    • Input impedance 330-kΩ for gains of 1, 2, and 4
    • Input impedance ≥ 1-MΩ for gains of 8, 16, 32, 64, and 128
  • Programmable channel-to-channel phase delay calibration:
    • 244-ns resolution, 8.192-MHz fCLKIN
  • Current-detect mode allows for extremely low power tamper detection
  • Fast startup: first data within 0.5 ms of supply ramp
  • Integrated negative charge pump allows input signals below ground
  • Crosstalk between channels: –120 dB
  • Low-drift internal voltage reference
  • Cyclic redundancy check (CRC) on communications and register map
  • 2.7-V to 3.6-V analog and digital supplies
  • Low power consumption: 4.9 mW at 3-V AVDD and DVDD
  • Packages: 32-pin TQFP or 32-pin WQFN
  • Operating temperature range: –40°C to +125°C
  • 6 simultaneously sampling differential inputs
  • Programmable data rate up to 32 kSPS
  • Programmable gain up to 128
  • Noise performance:
    • 102-dB dynamic range at gain = 1, 4 kSPS
    • 80-dB dynamic range at gain = 64, 4 kSPS
  • Total harmonic distortion: –100 dB
  • High-impedance inputs for direct sensor connection:
    • Input impedance 330-kΩ for gains of 1, 2, and 4
    • Input impedance ≥ 1-MΩ for gains of 8, 16, 32, 64, and 128
  • Programmable channel-to-channel phase delay calibration:
    • 244-ns resolution, 8.192-MHz fCLKIN
  • Current-detect mode allows for extremely low power tamper detection
  • Fast startup: first data within 0.5 ms of supply ramp
  • Integrated negative charge pump allows input signals below ground
  • Crosstalk between channels: –120 dB
  • Low-drift internal voltage reference
  • Cyclic redundancy check (CRC) on communications and register map
  • 2.7-V to 3.6-V analog and digital supplies
  • Low power consumption: 4.9 mW at 3-V AVDD and DVDD
  • Packages: 32-pin TQFP or 32-pin WQFN
  • Operating temperature range: –40°C to +125°C

The ADS131M06 is a six-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device an excellent fit for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer or a Rogowski coil to measure current.

The individual ADC channels can be independently configured depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. Additionally, this device integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal-chain errors.

A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area. Optional cyclic redundancy checks (CRCs) on the data input, data output, and register map maintain communication integrity.

The complete analog front-end (AFE) is offered in a 32-pin TQFP package or a leadless 32-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.

The ADS131M06 is a six-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device an excellent fit for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer or a Rogowski coil to measure current.

The individual ADC channels can be independently configured depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. Additionally, this device integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal-chain errors.

A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area. Optional cyclic redundancy checks (CRCs) on the data input, data output, and register map maintain communication integrity.

The complete analog front-end (AFE) is offered in a 32-pin TQFP package or a leadless 32-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.
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Technical documentation

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Type Title Date
* Data sheet ADS131M06 6-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC datasheet (Rev. A) PDF | HTML 17 Feb 2021
Application note A Basic Guide to Bridge Measurements PDF | HTML 18 Feb 2022
Application note Two-Phase Rogowski Coil Based Electricity Meter Analog Front-End Circuit (Rev. A) 10 Sep 2021
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 23 Aug 2021
Circuit design Circuit for protecting ADS131M0x ADC from electrical overstress PDF | HTML 31 Mar 2021
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Technical article Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) 13 Mar 2015

Design & development

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Evaluation board

ADS131M08EVM — ADS131M08 evaluation module for eight-channel, 24-bit, simultaneous-sampling, delta-sigma ADC

The ADS131M08 evaluation module (EVM) is a platform for evaluating the ADS131M08, which is a low-power, 8-channel, simultaneous-sampling, delta-sigma analog-to-digital converter (ADC).

The ADS131M08EVM kit includes the ADS131M08EVM board and a precision host interface (PHI) controller (...)

User guide: PDF
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Support software

ADS131M0x Example C Code (Rev. B)

SBAC254B.ZIP (64 KB)
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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

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 (...)
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Calculation tool

ANALOG-ENGINEER-CALC — 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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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
User guide: PDF
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QFN (RSN) 32 View options
TQFP (PBS) 32 View options

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