ADS131M04-Q1
Automotive, four-channel, 24-bit, 64-kSPS simultaneous-sampling delta-sigma ADC
ADS131M04-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- 4 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
- CRC on communications and register map
- Analog and digital supplies: 2.7 V to 3.6 V
- Low-power consumption: 3.3 mW at 3-V AVDD and DVDD
- Package: 20-pin TSSOP
The ADS131M04-Q1 is a four-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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Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS131M04-Q1 Automotive, 4-Channel, 64-kSPS, Simultaneous-Sampling, 24-Bit, Delta-Sigma ADC datasheet (Rev. A) | PDF | HTML | 10 Aug 2022 |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
Functional safety information | ADS131M04-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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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).
The ADS131M04EVM kit includes the ADS131M04EVM board and a precision host interface (PHI) controller board that (...)
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TSSOP (PW) | 20 | Ultra Librarian |
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