ADS131M02-Q1系列介绍资料

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ADS131M02-Q1

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汽车类双通道、24 位、64kSPS 同步采样 Δ-Σ ADC

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The ADS131M02-Q1 is a two-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.

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T_A
Functional Safety-Capable
- Documentation available to aid functional safety system design
2 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, f_CLKIN = 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: 2.3 mW at 3-V AVDD and DVDD
Package: 20-pin TSSOP

Resolution (Bits)	24
Sample rate (max) (ksps)	64
Number of input channels	2
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)	1.95
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)

41.6 mm² 6.5 x 6.4

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ADS131M02-Q1

汽车类双通道、24 位、64kSPS 同步采样 Δ-Σ ADC

4000-306-326