ADS1131

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SBAS449B

– JULY 2009 – REVISED SEPTEMBER 2011

ELECTRICAL CHARACTERISTICS

Minimum/maximum limit specifications apply from

–40°C to +85°C. Typical specifications at +25°C.

All specifications at AVDD = DVDD = VREFP = +5V, and VREFN = GND, unless otherwise noted.

ADS1131

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUTS

V

Full-scale input voltage (AINP

– AINN)

±39.0

mV

±23.4

mV

Common-mode input range

GND + 1.5V

AVDD

– 1.5V

V

Differential input current

±2

nA

LOW-SIDE POWER SWITCH

3.5

5

Ω

4

7

Ω

Current through switch

30

mA

SYSTEM PERFORMANCE

Resolution

No missing codes

18

Bits

SPEED = high

80

SPS

Data rate

SPEED = low

10

SPS

Digital filter settling time

Full settling

4

Conversions

Integral nonlinearity (INL)

Differential input, end-point fit

±8

ppm

Input offset error

10

μV

Input offset drift

±15

nV/

°C

Gain error

1

%

Gain drift

±4

ppm/

°C

Normal-mode rejection

90

dB

Common-mode rejection

At dc

110

dB

1

LSB

1.7

LSB

Noise (peak-to-peak)

300

nV

500

nV

Power-supply rejection

At dc

100

dB

VOLTAGE REFERENCE INPUT

1.5

AVDD

AVDD + 0.1V

V

Negative reference input (VREFN)

AGND

– 0.1

VREFP

– 1.5

V

Positive reference input (VREFP)

VREFN + 1.5

AVDD + 0.1

V

Voltage reference input current

10

nA

DIGITAL INPUT/OUTPUT (DVDD = 2.7V to 5.3V)

0.8 DVDD

DVDD + 0.1

V

GND

0.2 DVDD

V

Logic levels

DVDD

– 0.4

V

0.2 DVDD

V

Input leakage

0

±10

μA

5

MHz

Copyright

© 2009–2011, Texas Instruments Incorporated

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