Datasheet

Data Sheet AD5231
Rev. D | Page 3 of 28
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—10 kΩ, 50 kΩ, 100 kΩ VERSIONS
V
DD
= 3 V ± 10% or 5 V ± 10%, V
SS
= 0 V, V
A
= V
DD
, V
B
= 0 V, −40°C < T
A
< +85°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ
1
Max Unit
DC CHARACTERISTICS—
RHEOSTAT MODE
Resistor Differential Nonlinearity
2
R-DNL R
WB
, V
A
= NC, monotonic −1 ±1/2 +1.8 LSB
Resistor Integral Nonlinearity
2
R-INL R
WB
,V
A
= NC −0.2 +0.2 LSB
Nominal Resistor Tolerance ΔR
AB
/R
AB
D = 0x3FF −40 +20 %
Resistance Temperature Coefficient (ΔR
WB
/R
WB
)/ΔT × 10
6
600 ppm/°C
Wiper Resistance R
W
I
W
= 100 µA, V
DD
= 5.5 V,
code = half scale
15 100 Ω
I
W
= 100 µA, V
DD
= 3 V,
code = half scale
50
Ω
DC CHARACTERISTICS—
POTENTIOMETER DIVIDER MODE
Resolution N 10 Bits
Differential Nonlinearity
3
DNL Monotonic, T
A
= 25°C −1 ±1/2 +1 LSB
Monotonic, T
A
= −40°C or +85°C −1 +1.25 LSB
Integral Nonlinearity
3
INL −0.4 +0.4 LSB
Voltage Divider Temperature
Coefficient
(ΔV
W
/V
W
)/ΔT × 10
6
Code = half scale 15 ppm/°C
Full-Scale Error V
WFSE
Code = full scale −3 0 % FS
Zero-Scale Error V
WZSE
Code = zero scale 0 1.5 % FS
RESISTOR TERMINALS
Terminal Voltage Range
4
V
A, B, W
V
SS
V
DD
V
Capacitance A, B
5
C
A, B
f = 1 MHz, measured to GND,
code = half-scale
50 pF
Capacitance W
5
C
W
f = 1 MHz, measured to GND,
code = half-scale
50 pF
Common-Mode Leakage Current
5, 6
I
CM
V
W
= V
DD
/2 0.01 1 µA
DIGITAL INPUTS AND OUTPUTS
Input Logic High V
IH
With respect to GND, V
DD
= 5 V 2.4 V
Input Logic Low V
IL
With respect to GND, V
DD
= 5 V 0.8 V
Input Logic High V
IH
With respect to GND, V
DD
= 3 V 2.1 V
Input Logic Low V
IL
With respect to GND, V
DD
= 3 V 0.6 V
Input Logic High V
IH
With respect to GND, V
DD
= +2.5 V,
V
SS
= −2.5 V
2.0 V
Input Logic Low V
IL
With respect to GND, V
DD
= +2.5 V,
V
SS
= −2.5 V
0.5 V
Output Logic High (SDO, RDY) V
OH
R
PULL-UP
= 2.2 kΩ to 5 V
(see Figure 26)
4.9 V
Output Logic Low V
OL
I
OL
= 1.6 mA, V
LOGIC
= 5 V
(see Figure 26)
0.4 V
Input Current I
IL
V
IN
= 0 V or V
DD
±2.5 µA
Input Capacitance
5
C
IL
4 pF
Output Current
5
I
O1
, I
O2
V
DD
= 5 V, V
SS
= 0 V, T
A
= 25°C 50 mA
V
DD
= 2.5 V, V
SS
= 0 V, T
A
= 25°C 7 mA