Parameter

Symbol

Conditions

Min

Typ1

Max

Unit

DC CHARACTERISTICS RHEOSTAT MODE

Resistor Differential NL2

R-DNL

R_WB, V_A = NC

−1

±0.3

+1

LSB

Resistor Nonlinearity2

R-INL

R_WB, V_A = NC

−1.5

±0.7

+1.5

LSB

Nominal Resistor Tolerance

∆R_AB

T_A = +25°C

−30

+30

%

Resistance Temperature Coefficient3

(∆R_AB/R_AB)/∆T×106

V_AB = V_DD, wiper = no connect

35

ppm/°C

Wiper Resistance

R_W

50

100

Ω

DC CHARACTERISTICS POTENTIOMETER DIVIDER MODE

Integral Nonlinearity4

INL

−1

±0.3

+1

LSB

Differential Nonlinearity4

DNL

−1

±0.3

+1

LSB

Voltage Divider Temperature Coefficient

(∆V_W/V_W)/∆T×106

Code = 0x80

5

ppm/°C

Full-Scale Error

V_WFSE

Code = 0xFF

−6

−4

0

LSB

Zero-Scale Error

V_WZSE

Code = 0x00

0

+3

+5

LSB

RESISTOR TERMINALS

Voltage Range5

V_A, B, W

V_SS

V_DD

V

Capacitance6 A, B

C_A, B

f = 1 MHz, measured to GND, code = 0x80

45

pF

Capacitance6

C_W

f = 1 MHz, measured to GND, code = 0x80

60

pF

Common-Mode Leakage

I_CM

V_A = V_B = V_W

1

nA

DIGITAL INPUTS AND OUTPUTS

Input Logic High (CS, CLK, SDI)

V_IH

2.4

V

Input Logic Low (CS, CLK, SDI)

V_IL

0.8

V

Output Logic High (SDO)

V_OH

R_Pull-up = 2.2 kΩ to 5 V

4.9

V

Output Logic Low (SDO)

V_OL

I_OL = 1.6 mA

0.4

V

Input Current

I_IL

V_IN = 0 V or 5 V

±1

μA