Texas Instruments ADS131B02-Q1 Handleiding

Bekijk gratis de handleiding van Texas Instruments ADS131B02-Q1 (68 pagina’s), behorend tot de categorie Niet gecategoriseerd. Deze gids werd als nuttig beoordeeld door 2 mensen en kreeg gemiddeld 4.7 sterren uit 5 reviews. Heb je een vraag over Texas Instruments ADS131B02-Q1 of wil je andere gebruikers van dit product iets vragen? Stel een vraag

ADS131B02-Q1 Automotive, 2-Channel, 32-kSPS, Simultaneous-Sampling,

24-Bit, Delta-Sigma 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 simultaneous-sampling, differential input ADCs

•Programmable data rate: Up to 32 kSPS

•Programmable gain: Up to 128

•Noise performance:

–0.82 μV

RMS

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: 3 mW at 3.3-V AVDD

and DVDD

2 Applications

•EV charging stations

–DC e-metering

•Automotive battery management systems (BMS):

–Current-shunt measurements

–Voltage measurements using external resistor

dividers

–Temperature measurements using thermistors

or analog output temperature sensors

•Energy storage systems (ESS)

3 Description

The ADS131B02-Q1 is a two-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.

Device Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

ADS131B02-Q1TSSOP (20)6.50 mm × 4.40 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

'6ADC

SCLK

DOUT

DIN

CS

Gain & Offset

Calibration

AVDD

AGND

DVDD

DGND

DRDY

Oscillator

CLKIN

1.2-V

Reference

SYNC/RESET

Digital Filter

'6ADC

Gain & Offset

Calibration

Digital Filter

AIN0P

AIN0N

+

±

AIN1P

AIN1N

+

±

Control &

Serial Interface

Clock

Selection

Simplified Block Diagram

ADS131B02-Q1

SBASAA3 – SEPTEMBER 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product specificaties