ADS131B04-Q1
24-Bit, 32-kSPS, 4-Kanal, simultanabtastender Delta-Sigma A/D-Wandler für die Automobilindustrie
ADS131B04-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- 4 simultaneous-sampling, differential input ADCs
- Programmable data rate: Up to 32 kSPS
- Programmable gain: Up to 128
- Noise performance:
- 0.82 µVRMS at 1 kSPS, gain = 8
- Global-chop mode to remove offset drift over temperature and time
- High-impedance analog inputs for direct sensor connection
- Integrated negative charge pump allows input signal measurements below ground
- Crosstalk between channels: –120 dB
- Low-drift internal reference: 1.2 V
- Precision internal oscillator
- CRC on communications and register map
- Analog and digital supplies: 2.7 V to 3.6 V
- Low power consumption: 5 mW at 3.3-V AVDD and DVDD
The ADS131B04-Q1 is a four-channel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) that offers wide dynamic range, low power, and buffered analog inputs, making the device an excellent fit 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. The device features a global-chop mode to remove offset drift over temperature and time. Additionally, this device integrates offset and gain calibration registers to help remove signal-chain errors.
A low-drift, 1.2-V reference and precision oscillator are 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.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | ADS131B04-Q1 Automotive, 4-Channel, 32-kSPS, Simultaneous-Sampling,24-Bit, Delta-Sigma ADC datasheet (Rev. B) | PDF | HTML | 05 Nov 2021 |
Technical article | How precision ADCs enable highly accurate metering systems in EV chargers | PDF | HTML | 05 Jan 2024 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mär 2023 | |
Functional safety information | ADS131B04-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) | PDF | HTML | 05 Nov 2021 | |
Circuit design | Circuit for protecting ADS131M0x ADC from electrical overstress | PDF | HTML | 31 Mär 2021 | |
EVM User's guide | ADS131B04-Q1EVM User's Guide | PDF | HTML | 27 Apr 2020 |
Design und Entwicklung
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ADS131B04-Q1EVM — ADS131B04-Q1 24-Bit, 32-kSPS, 4-Kanal-Delta-Sigma-ADC-Evaluierungsmodul mit simultaner Abtastung
The ADS131B04-Q1 evaluation module (EVM) is a platform for evaluating the ADS131B04-Q1 product, which is a low-power, four-channel, simultaneous-sampling, delta-sigma analog-to-digital converter (ADC).
The ADS131B04-Q1EVM kit includes the ADS131B04-Q1 board and a precision host interface (PHI) (...)
ADC-DESIGN-CALC — Online design calculator tool for TI Precision ADCs
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Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
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TSSOP (PW) | 20 | Ultra Librarian |
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