Data Sheet
AD5251/AD5252
Rev. D | Page 3 of 28
ELECTRICAL CHARACTERISTICS
1 k VERSION
VDD = 3 V ± 10% or 5 V ± 10%, VSS = 0 V or VDD/VSS = ±2.5 V ± 10%, VA = VDD, VB = 0 V, –40°C < TA < +105°C, unless otherwise noted.
Table 1.
Parameter
Symbol
Conditions
Min
Max
Unit
DC CHARACTERISTICS—
RHEOSTAT MODE
Resolution
N
AD5251
6
Bits
AD5252
8
Bits
Resistor Differential Nonlinearit
y2R-DNL
R
WB, RWA = NC, VDD = 5.5 V, AD5251
–0.5
±0.2
+0.5
LSB
R
WB, RWA = NC, VDD = 5.5 V, AD5252
–1.00
±0.25
+1.00
LSB
R
WB, RWA = NC, VDD = 2.7 V, AD5251
–0.75
±0.30
+0.75
LSB
R
WB, RWA = NC, VDD = 2.7 V, AD5252
–1.5
±0.3
+1.5
LSB
R-INL
R
WB, RWA = NC, VDD = 5.5 V, AD5251
–0.5
±0.2
+0.5
LSB
R
WB, RWA = NC, VDD = 5.5 V, AD5252
–2.0
±0.5
+2.0
LSB
R
WB, RWA = NC, VDD = 2.7 V, AD5251
–1.0
+2.5
+4.0
LSB
R
WB, RWA = NC, VDD = 2.7 V, AD5252
–2
+9
+14
LSB
Nominal Resistor Tolerance
ΔR
AB/RAB
T
A = 25°C
–30
+30
%
Resistance Temperature Coefficient
(ΔR
AB/RAB) × 10
6/ΔT
650
ppm/°C
Wiper Resistance
R
W
I
W = 1 V/R, VDD = 5 V
75
130
I
W = 1 V/R, VDD = 3 V
200
300
Channel-Resistance Matching
ΔR
AB1/ΔRAB3
0.15
%
DC CHARACTERISTICS—
POTENTIOMETER DIVIDER MODE
Differential Nonlinearit
y3DNL
AD5251
–0.5
±0.1
+0.5
LSB
AD5252
–1.00
±0.25
+1.00
LSB
INL
AD5251
–0.5
±0.2
+0.5
LSB
AD5252
–2.0
±0.5
+2.0
LSB
Voltage Divider Tempco
(ΔV
W/VW) × 10
6/ΔT
Code = half scale
25
ppm/°C
Full-Scale Error
V
WFSE
Code = full scale, V
DD = 5.5 V, AD5251
–5
–3
0
LSB
Code = full scale, V
DD = 5.5 V, AD5252
–16
–11
0
LSB
Code = full scale, V
DD = 2.7 V, AD5251
6
–4
0
LSB
Code = full scale, V
DD = 2.7 V, AD5252
–23
–16
0
LSB
Zero-Scale Error
V
WZSE
Code = zero scale, V
DD = 5.5 V, AD5251
0
3
5
LSB
Code = zero scale, V
DD = 5.5 V, AD5252
0
11
16
LSB
Code = zero scale, V
DD = 2.7 V, AD5251
0
4
6
LSB
Code = zero scale, V
DD = 2.7 V, AD5252
0
15
20
LSB
RESISTOR TERMINALS
V
A, VB, VW
V
SS
V
DD
V
C
A, CB
f = 1 kHz, measured to GND,
code = half scale
85
pF
C
W
f = 1 kHz, measured to GND,
code = half scale
95
pF
Common-Mode Leakage Current
I
CM
V
A = VB = VDD/2
0.01
1
A