AD5231 datasheet(3/28 Pages) AD

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Data Sheet

AD5231

Rev. D | Page 3 of 28

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS—10 kΩ, 50 kΩ, 100 kΩ VERSIONS

VDD = 3 V ± 10% or 5 V ± 10%, VSS = 0 V, VA = VDD, VB = 0 V, −40°C < TA < +85°C, unless otherwise noted.

Table 1.

Parameter

Symbol

Conditions

Min

Typ1

Max

Unit

DC CHARACTERISTICS—

RHEOSTAT MODE

Resistor Differential Nonlinearity2

R-DNL

RWB, VA = NC, monotonic

−1

±1/2

+1.8

LSB

Resistor Integral Nonlinearity2

R-INL

RWB,VA = NC

−0.2

+0.2

LSB

Nominal Resistor Tolerance

ΔRAB/RAB

D = 0x3FF

−40

+20

Resistance Temperature Coefficient

(ΔRWB/RWB)/ΔT × 106

600

ppm/°C

Wiper Resistance

IW = 100 µA, VDD = 5.5 V,

code = half scale

100

Ω

IW = 100 µA, VDD = 3 V,

code = half scale

Ω

DC CHARACTERISTICS—

POTENTIOMETER DIVIDER MODE

Resolution

Bits

Differential Nonlinearity3

DNL

Monotonic, TA = 25°C

−1

±1/2

LSB

Monotonic, TA = −40°C or +85°C

−1

+1.25

LSB

Integral Nonlinearity3

INL

−0.4

+0.4

LSB

Voltage Divider Temperature

Coefficient

(ΔVW/VW)/ΔT × 106

Code = half scale

ppm/°C

Full-Scale Error

VWFSE

Code = full scale

−3

% FS

Zero-Scale Error

VWZSE

Code = zero scale

1.5

% FS

RESISTOR TERMINALS

Terminal Voltage Range4

VA, B,W

VSS

VDD

Capacitance A, B5

CA, B

f = 1 MHz, measured to GND,

code = half-scale

Capacitance W5

f = 1 MHz, measured to GND,

code = half-scale

Common-Mode Leakage Current5, 6

ICM

VW = VDD/2

0.01

µA

DIGITAL INPUTS AND OUTPUTS

Input Logic High

VIH

With respect to GND, VDD = 5 V

2.4

Input Logic Low

VIL

With respect to GND, VDD = 5 V

0.8

Input Logic High

VIH

With respect to GND, VDD = 3 V

2.1

Input Logic Low

VIL

With respect to GND, VDD = 3 V

0.6

Input Logic High

VIH

With respect to GND, VDD = +2.5 V,

VSS = −2.5 V

2.0

Input Logic Low

VIL

With respect to GND, VDD = +2.5 V,

VSS = −2.5 V

0.5

Output Logic High (SDO, RDY)

VOH

RPULL-UP = 2.2 kΩ to 5 V

(see Figure 26)

4.9

Output Logic Low

VOL

IOL = 1.6 mA, VLOGIC = 5 V

(see Figure 26)

0.4

Input Current

IIL

VIN = 0 V or VDD

±2.5

µA

Input Capacitance5

CIL

Output Current5

IO1, IO2

VDD = 5 V, VSS = 0 V, TA = 25°C

VDD = 2.5 V, VSS = 0 V, TA = 25°C

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