ADS1018

SBAS526C – NOVEMBER 2012 – REVISED NOVEMBER 2015

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7.5 Electrical Characteristics

All specifications are at VDD = 3.3 V and FSR = ±2.048 V (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUTS

8

6

Common-mode input impedance

M

Ω

FSR = ±1.024 V

3

FSR = ±0.512 V, FSR = ±0.256 V

100

22

15

M

Ω

Differential input impedance

FSR = ±2.048 V

4.9

FSR = ±1.024 V

2.4

FSR = ±0.512 V, FSR = ±0.256 V

710

k

Ω

SYSTEM PERFORMANCE

Resolution (no missing codes)

12

Bits

DR

Data rate

128, 250, 490, 920, 1600, 2400, 3300

SPS

Data rate variation

All data rates

–10%

10%

INL

Integral nonlinearity

0.5

LSB

FSR = ±2.048 V, differential inputs

0

±0.5

Offset error

LSB

FSR = ±2.048 V, single-ended inputs

±0.25

Offset drift

FSR = ±2.048 V

0.002

LSB/°C

Offset channel match

Match between any two inputs

0.25

LSB

0.05%

0.25%

FSR = ±0.256 V

7

FSR = ±2.048 V

5

40

ppm/°C

5

Match between any two gains

0.02%

0.1%

Gain channel match

Match between any two inputs

0.05%

0.1%

TEMPERATURE SENSOR

Temperature range

–40

125

°C

Temperature resolution

0.125

°C/LSB

0.25

±1

°C

Accuracy

0.5

±2

versus supply

0.125

±1

°C/V

(1)

This parameter expresses the full-scale range of the ADC scaling. No more than VDD + 0.3 V or 5.5 V (whichever is smaller) must be

applied to this device.

(2)

Best-fit INL; covers 99% of full-scale.

(3)

Includes all errors from onboard PGA and voltage reference.

(4)

Maximum value specified by characterization.

6

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