Data Sheet
AD5251/AD5252
ELECTRICAL CHARACTERISTICS
1 kΩ 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
Typ 1
Max
Unit
DC CHARACTERISTICS—
RHEOSTAT MODE
Resolution
N
AD5251
AD5252
6
8
Bits
Bits
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
%
Resistor Differential Nonlinearity2
R-DNL
RWB, RWA = NC, VDD = 5.5 V, AD5251
RWB, RWA = NC, VDD = 5.5 V, AD5252
RWB, RWA = NC, VDD = 2.7 V, AD5251
RWB, RWA = NC, VDD = 2.7 V, AD5252
RWB, RWA = NC, VDD = 5.5 V, AD5251
RWB, RWA = NC, VDD = 5.5 V, AD5252
RWB, RWA = NC, VDD = 2.7 V, AD5251
RWB, RWA = NC, VDD = 2.7 V, AD5252
TA = 25°C
–0.5
–1.00
–0.75
–1.5
–0.5
–2.0
–1.0
–2
0.2
0.25
0.30
0.3
0.2
0.5
+0.5
+1.00
+0.75
+1.5
+0.5
+2.0
+4.0
+14
+30
Resistor Nonlinearity2
R-INL
+2.5
+9
Nominal Resistor Tolerance
Resistance Temperature Coefficient (ΔRAB/RAB) × 106/ΔT
Wiper Resistance
ΔRAB/RAB
–30
650
75
200
0.15
ppm/°C
Ω
Ω
RW
IW = 1 V/R, VDD = 5 V
IW = 1 V/R, VDD = 3 V
130
300
Channel-Resistance Matching
ΔRAB1/ΔRAB3
%
DC CHARACTERISTICS—
POTENTIOMETER DIVIDER MODE
Differential Nonlinearity3
DNL
INL
AD5251
AD5252
AD5251
AD5252
–0.5
–1.00
–0.5
–2.0
0.1
0.25
0.2
0.5
25
–3
–11
–4
–16
3
11
4
15
+0.5
+1.00
+0.5
+2.0
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
Integral Nonlinearity3
Voltage Divider Tempco
Full-Scale Error
(ΔVW/VW) × 106/ΔT
VWFSE
Code = half scale
Code = full scale, VDD = 5.5 V, AD5251
Code = full scale, VDD = 5.5 V, AD5252
Code = full scale, VDD = 2.7 V, AD5251
Code = full scale, VDD = 2.7 V, AD5252
Code = zero scale, VDD = 5.5 V, AD5251
Code = zero scale, VDD = 5.5 V, AD5252
Code = zero scale, VDD = 2.7 V, AD5251
Code = zero scale, VDD = 2.7 V, AD5252
–5
–16
−6
–23
0
0
0
0
0
0
0
0
5
16
6
Zero-Scale Error
VWZSE
20
RESISTOR TERMINALS
Voltage Range4
VA, VB, VW
CA, CB
VSS
VDD
V
pF
Capacitance5 A, B
f = 1 kHz, measured to GND,
code = half scale
f = 1 kHz, measured to GND,
code = half scale
85
Capacitance5 W
CW
ICM
95
pF
µA
Common-Mode Leakage Current
VA = VB = VDD/2
0.01
1
Rev. D | Page 3 of 28