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ADS131M03-Q1

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Automotive, three-channel, 24-bit, 64-kSPS, simultaneous-sampling, delta-sigma ADC

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Data sheet

ADS131M03-Q1

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 3 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Automotive TI functional safety category Functional Safety-Capable Reference mode Internal Input voltage range (max) (V) 3.6 Input voltage range (min) (V) -1.3 Features PGA, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 2.7 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 3.6 SNR (dB) 100 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 3 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Automotive TI functional safety category Functional Safety-Capable Reference mode Internal Input voltage range (max) (V) 3.6 Input voltage range (min) (V) -1.3 Features PGA, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 2.7 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 3.6 SNR (dB) 100 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • 3 simultaneously sampling differential inputs
  • Programmable data rate up to 64 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:
    • 330-kΩ input impedance for gains of 1, 2, and 4
    • ≥ 1-MΩ input impedance for gains of 8, 16, 32, 64, and 128
  • Programmable channel-to-channel phase delay calibration:
    • Resolution = 244 ns, fCLKIN = 8.192 MHz
  • Fast start-up: 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
  • Analog and digital supplies: 2.7 V to 3.6 V
  • Low-power consumption: 3.6 mW at 3-V AVDD and DVDD
  • Package: 20-pin TSSOP
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • 3 simultaneously sampling differential inputs
  • Programmable data rate up to 64 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:
    • 330-kΩ input impedance for gains of 1, 2, and 4
    • ≥ 1-MΩ input impedance for gains of 8, 16, 32, 64, and 128
  • Programmable channel-to-channel phase delay calibration:
    • Resolution = 244 ns, fCLKIN = 8.192 MHz
  • Fast start-up: 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
  • Analog and digital supplies: 2.7 V to 3.6 V
  • Low-power consumption: 3.6 mW at 3-V AVDD and DVDD
  • Package: 20-pin TSSOP

The ADS131M03-Q1 is a three-channel, simultaneously sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range and low power, making the device designed for automotive battery management systems (BMS). The ADC inputs can be directly interfaced to shunt resistors for bidirectional battery-current measurements, to resistor-divider networks for high-voltage measurements, or to temperature sensors (such as thermistors or analog output temperature sensors).

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 20-pin TSSOP package and is specified over the automotive temperature range of –40°C to +125°C.

The ADS131M03-Q1 is a three-channel, simultaneously sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range and low power, making the device designed for automotive battery management systems (BMS). The ADC inputs can be directly interfaced to shunt resistors for bidirectional battery-current measurements, to resistor-divider networks for high-voltage measurements, or to temperature sensors (such as thermistors or analog output temperature sensors).

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 20-pin TSSOP package and is specified over the automotive temperature range of –40°C to +125°C.
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Type Title Date
* Data sheet ADS131M03-Q1 Automotive, 3-Channel, 64-kSPS, Simultaneous-Sampling, 24-Bit, Delta-Sigma ADC datasheet PDF | HTML 10 Aug 2022
Functional safety information ADS131M03-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 14 Jun 2022
More literature Addressing BMS Battery Pack Current and Voltage Measurement Requirements 05 May 2022

Design & development

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Evaluation board

ADS131M04EVM — Automotive, four-channel, 24-bit, 64-kSPS, simultaneous-sampling, delta-sigma ADC

The ADS131M04 evaluation module (EVM) is a platform for evaluating the ADS131M04, which is a low-power, simultaneous-sampling, delta-sigma analog-to-digital converter (ADC).

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Support software

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