5.5 Electrical Characteristics

minimum and maximum specifications apply from TA = –40°C to +105°C; typical specifications are at TA = 25°C; all

specifications are at AVDD = DVDD = V(REFP) = 5V, V(REFN) = AGND, and fCLK = 4.9152MHz (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUTS

Differential input current

Gain = 1

±3

nA

Gain = 2

±6

Gain = 64, 128

±3.5

SYSTEM PERFORMANCE

Resolution

No missing codes

24

Bits

fDATA

Data rate

Internal oscillator, SPEED = high

78

80

82.4

SPS

Internal oscillator, SPEED = low

9.75

10

10.3

External oscillator, SPEED = high

fCLK / 61,440

External oscillator, SPEED = low

fCLK / 491,520

Digital filter settling time

Full settling, readings synchronized with

A0, A1 pins

4

Conversions

INL

Integral nonlinearity

Differential input, end-point fit, gain = 1, 2

–0.001

±0.0002

0.001

% of FSR(1)

Differential input, end-point fit, gain = 64,

128

±0.0004

Input offset error(2)

Gain = 1

–5

±0.2

5

ppm of FS

Gain = 128

–1

±0.02

1

Input offset drift

Gain = 1

±0.3

µV/°C

Gain = 128

±10

nV/°C

Gain error(3)

Gain = 1

–0.02

±0.001

0.02

%

Gain = 128

–0.1

±0.01

0.1

Gain drift

Gain = 1

±0.2

ppm/°C

Gain = 128

±2.5

NMRR

Normal-mode rejection ratio (4)

Internal oscillator, fDATA = 10SPS

fIN = 50Hz or 60Hz, ±1Hz

100

110

dB

External oscillator, fDATA = 10SPS

fIN = 50Hz or 60Hz, ±1Hz

120

130

CMRR

Common-mode rejection ratio

At DC, gain = 1, ΔV = 1V, VCM = AVDD / 2

95

110

dB

At DC, gain = 128, ΔV = 0.1V, VCM =

AVDD / 2

95

110

en

Input-referred noise

See the Noise Performance section

PSRR

Power-supply rejection

AVDD, at DC, gain = 1, ΔV = 1V

85

dB

AVDD, at DC, gain = 128, ΔV = 0.1V

100

120

VOLTAGE REFERENCE INPUT

Input current

10

nA

DIGITAL LOGIC LEVELS

VIH

High-level input voltage

0.7 DVDD

V

VIL

Low-level input voltage

0.2 DVDD

V

VOH

High-level output voltage

IOH = 1mA

DVDD – 0.4

V

VOL

Low-level output voltage

IOL = 1mA

0.2 DVDD

V

Input leakage current

0V < VIN < DVDD

–10

10

µA

www.ti.com

ADS1232, ADS1234

SBAS350H – JUNE 2005 – REVISED JUNE 2025

Copyright © 2025 Texas Instruments Incorporated

Submit Document Feedback

7

Product Folder Links: ADS1232 ADS1234