Datasheet > ADS131M03

ADS131M03

更新时间： 2022-06-24 15:39:41

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
98页	3162K
描述
ADS131M03 3-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC

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ADS131M03 数据手册

ADS131M03

SBAS889A – JANUARY 2020 – REVISED APRIL 2021

www.ti.com

6.5 Electrical Characteristics

minimum and maximum specifications apply from T_A= –40°C to +125°C; typical specifications are at T_A= 25°C; all

specifications are at AVDD = 3 V, DVDD = 3 V, f_CLKIN= 8.192 MHz, data rate = 4 kSPS, all channels enabled, global-chop

mode disabled and gain = 1 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUTS

Gain = 1, 2, or 4, V_INP= V_INN= 0 V,

I_B= (I_BP+ I_BN) / 2

Input bias current

0.6

0.2

I_B

µA

Gain = 8, 16, 32, 64 or 128, V_INP= V_INN

0 V, I_B= (I_BP+ I_BN) / 2

Gain = 1, 2, or 4

300

kΩ

Z_in

Differential input impedance

Gain = 8, 16, 32, 64, or 128

±1 ⁽¹⁾

µA/V

ADC CHARACTERISTICS

Resolution

Bits

Gain settings

1, 2, 4, 8, 16, 32, 64, 128

250

High-resolution mode, f_CLKIN= 8.192 MHz

Low-power mode, f_CLKIN= 4.096 MHz

Very-low-power mode, f_CLKIN= 2.048 MHz

64k

32k

16k

f_DATA

Data rate

125

SPS

62.5

Measured from supplies at 90% to first DRDY

falling edge

Startup time

0.5

ADC PERFORMANCE

ppm of

FSR

INL

Integral nonlinearity (best fit)

±175

Offset error (input referred)

Offset drift

Global-chop mode, channel 0

±35

µV

Global-chop mode, channels 1-3

±15

300

nV/°C

μV

Global-chop mode

200

1000 hours at 85°C, TSSOP package

1000 hours at 85°C, QFN package

Offset error time drift

Gain error

±0.1%

Gain drift

ppm/°C

ppm

Including internal reference

1000 hours at 85°C, TSSOP package

1000 hours at 85°C, QFN package

At dc

8.5

400

Gain error time drift

120

100

CMRR

PSRR

Common-mode rejection ratio

f_CM= 50 Hz or 60 Hz

AVDD at dc

DVDD at dc

Power-supply rejection ratio

Input-referred noise

AVDD supply, f_PS= 50 Hz or 60 Hz

DVDD supply, f_PS= 50 Hz or 60 Hz

5.35

µV_RMS

During fast-startup

Gain = 1

55.0

102

Dynamic range

Crosstalk

Gain = 64

All other gain settings

f_IN= 50 Hz or 60 Hz

See Table 7-1

–120

f_IN= 50 Hz or 60 Hz, gain = 1, V_IN= –0.5 dBFS,

normalized

100

SNR

THD

Signal-to-noise ratio

f_IN= 50 Hz or 60 Hz, gain = 64, V_IN= –0.5 dBFS,

normalized

f_IN= 50 Hz or 60 Hz (up to 50 harmonics),

V_IN= –0.5 dBFS

Total harmonic distortion

–100

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