TI-ADS131M02-Q1.pdf
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ADS131M02-Q1 汽车类、2 通道、64 kSPS、同步采样、24 位、Δ-Σ ADC
1 Features
• 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
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 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.
Package Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
ADS131M02-Q1 TSSOP (20) 6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
'6ADC
SCLK
DOUT
DIN
Control &
Serial Interface
CS
Gain & Offset
Calibration
AVDD
AGND
DVDD
DGND
DRDY
Clock
Generation
CLKIN
1.2-V
Reference
SYNC / RESET
Phase Shift &
Digital Filter
'6ADC
Gain & Offset
Calibration
Phase Shift &
Digital Filter
AIN0P
AIN0N
+
±
AIN1P
AIN1N
+
±
Simplified Block Diagram
ADS131M02-Q1
ZHCSOL6 – AUGUST 2022
本文档旨在为方便起见，提供有关 TI 产品中文版本的信息，以确认产品的概要。有关适用的官方英文版本的最新信息，请访问
www.ti.com，其内容始终优先。TI 不保证翻译的准确性和有效性。在实际设计之前，请务必参考最新版本的英文版本。
English Data Sheet: SBASAE7
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