ADS1262IPWR datasheet(8/133 Pages) TI2

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7.5 Electrical Characteristics (continued)

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

specifications are at VAVDD = 5 V, VAVSS = 0 V, VDVDD = 3.3 V, VREF = 2.5 V, fCLK = 7.3728 MHz, ADC1 data rate = 20 SPS

with PGA enabled and gain = 1, and ADC2 data rate = 10 SPS with gain = 1 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

CROSSTALK

Crosstalk

ADC1 to ADC2

μV/V

ADC2 to ADC1

EXTERNAL VOLTAGE REFERENCE INPUTS

Reference input current(5)

ADC1

150

ADC2

Input current vs voltage

VREF = 2 V to 4.8 V, ADC1

nA/V

Input current drift

ADC1

0.1

nA/°C

Input impedance

Differential, ADC1

MΩ

Low reference monitor

Threshold, ADC1

0.4

0.6

INTERNAL VOLTAGE REFERENCE

Reference voltage

2.5

Initial accuracy

TA = 25°C

±0.1%

±0.2%

Reference voltage temperature drift

TA = 0°C to +85°C

ppm/°C

TA = –40°C to +105°C

Reference voltage long term drift

TA = 85°C, 1st 1000 hr

ppm

Thermal hysteresis

First 0°C to 85°C cycle

ppm

Output current

-10

Load regulation

μV/mA

Start-up time

Settling time to ±0.001% final value

TEMPERATURE SENSOR

Voltage

TA = 25°C

122.4

Temperature coefficient

420

μV/°C

CURRENT SOURCES (IDAC1, IDAC2)

Currents

50, 100, 250, 500, 750,

1000, 1500, 2000, 2500, 3000

μA

Compliance range

All currents

VAVSS

VAVDD – 1.1

Absolute error

All currents

±0.7%

±4%

Match error

IDAC1 current = IDAC2 current

±0.1%

±1%

IDAC1 current ≠ IDAC2 current

±1%

Temperature drift

Absolute

ppm/°C

Match

LEVEL-SHIFT VOLTAGE

Voltage

(VAVDD + VAVSS) / 2

Output impedance

100

SENSOR BIAS

Currents

±0.5, ±2, ±10, ±50, ±200

μA

Pull-up/pull-down resistor

MΩ

TEST DAC (TDAC)

DAC reference voltage

VAVDD – VAVSS

Differential output voltage

18 binary weighted settings

–4

Absolute output voltage

To VAVSS

0.5

4.5

Accuracy

±0.1%

±1.5%

Output impedance

See Table 9-8

ADS1262, ADS1263

SBAS661C – FEBRUARY 2015 – REVISED MAY 2021

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