1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• 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, 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: 2.3 mW at 3-V AVDD

and DVDD

• Package: 20-pin TSSOP

2 Applications

• Automotive battery management systems (BMS):

– Current-shunt measurements

– Voltage measurements using external resistor

dividers

– Temperature measurements using thermistors

or analog output temperature sensors

• EV charging stations:

– DC e-metering

– AC e-metering

• Energy storage systems (ESS)

3 Description

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 highvoltage

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 lownoise,

programmable gain amplifier (PGA) provides

gains ranging from 1 to 128 to amplify low-level

signals. Additionally, this device integrates channelto-

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.

ADS131M02属于集成电路（IC） > 模数转换器（ADC）。美国德州仪器公司制造生产的ADS131M02模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。