Changed Temperature Range from –40°C to +85°C to –40°C
to +105°C (Throughout).................................................................. 1
Changed WP Leakage Current from 5 µA to 8 µA, Table 1........ 4
Changed WP Leakage Current from 5 µA to 8 µA, Table 2........ 5
Changes to Figure 11 and Figure 12............................................. 11
12/11—Rev. B to Rev. C
Changes to Theory of Operation Section .................................... 21
Changes to Ordering Guide .......................................................... 27
10/09—Rev. A to Rev. B
Changes to Figure 15 ...................................................................... 12
Changes to Figure 27 ...................................................................... 15
9/05—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Change to Figure 6 ......................................................................... 10
Changes to Figure 28...................................................................... 15
Changes to Figure 29...................................................................... 17
Changes to RDAC/EEMEM Quick Commands Section .......... 18
Changes to EEMEM Write Protection Section .......................... 18
Changes to Figure 37...................................................................... 22
Deleted Table 13 and Table 14 ...................................................... 23
Change to Figure 42 ....................................................................... 24
Change to Figure 46 ....................................................................... 25
Changes to Ordering Guide .......................................................... 27
6/04—Revision 0: Initial Version
Rev. D | Page 2 of 28
Data Sheet
ELECTRICAL CHARACTERISTICS
1 kΩ VERSION
AD5251/AD5252
V
DD
= 3 V ± 10% or 5 V ± 10%, V
SS
= 0 V or V
DD
/V
SS
= ±2.5 V ± 10%, V
A
= V
DD
, V
B
= 0 V, –40°C < T
A
< +105°C, unless otherwise noted.
Table 1.
Parameter
DC CHARACTERISTICS—
RHEOSTAT MODE
Resolution
Resistor Differential Nonlinearity
2
Symbol
Conditions
Min
Typ
1
Max
Unit
N
R-DNL
Resistor Nonlinearity
2
R-INL
Nominal Resistor Tolerance
Resistance Temperature Coefficient
Wiper Resistance
Channel-Resistance Matching
DC CHARACTERISTICS—
POTENTIOMETER DIVIDER MODE
Differential Nonlinearity
3
Integral Nonlinearity
3
Voltage Divider Tempco
Full-Scale Error
ΔR
AB
/R
AB
(ΔR
AB
/R
AB
) × 10
6
/ΔT
R
W
ΔR
AB1
/ΔR
AB3
AD5251
AD5252
R
WB
, R
WA
= NC, V
DD
= 5.5 V, AD5251
R
WB
, R
WA
= NC, V
DD
= 5.5 V, AD5252
R
WB
, R
WA
= NC, V
DD
= 2.7 V, AD5251
R
WB
, R
WA
= NC, V
DD
= 2.7 V, AD5252
R
WB
, R
WA
= NC, V
DD
= 5.5 V, AD5251
R
WB
, R
WA
= NC, V
DD
= 5.5 V, AD5252
R
WB
, R
WA
= NC, V
DD
= 2.7 V, AD5251
R
WB
, R
WA
= NC, V
DD
= 2.7 V, AD5252
T
A
= 25°C
I
W
= 1 V/R, V
DD
= 5 V
I
W
= 1 V/R, V
DD
= 3 V
–0.5
–1.00
–0.75
–1.5
–0.5
–2.0
–1.0
–2
–30
±0.2
±0.25
±0.30
±0.3
±0.2
±0.5
+2.5
+9
650
75
200
0.15
6
8
+0.5
+1.00
+0.75
+1.5
+0.5
+2.0
+4.0
+14
+30
130
300
Bits
Bits
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
%
ppm/°C
Ω
Ω
%
DNL
INL
(ΔV
W
/V
W
) × 10
6
/ΔT
V
WFSE
Zero-Scale Error
V
WZSE
AD5251
AD5252
AD5251
AD5252
Code = half scale
Code = full scale, V
DD
= 5.5 V, AD5251
Code = full scale, V
DD
= 5.5 V, AD5252
Code = full scale, V
DD
= 2.7 V, AD5251
Code = full scale, V
DD
= 2.7 V, AD5252
Code = zero scale, V
DD
= 5.5 V, AD5251
Code = zero scale, V
DD
= 5.5 V, AD5252
Code = zero scale, V
DD
= 2.7 V, AD5251
Code = zero scale, V
DD
= 2.7 V, AD5252
–0.5
–1.00
–0.5
–2.0
–5
–16
−6
–23
0
0
0
0
V
SS
±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
0
0
0
0
5
16
6
20
V
DD
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
V
pF
pF
RESISTOR TERMINALS
Voltage Range
4
Capacitance
5
A, B
Capacitance
5
W
Common-Mode Leakage Current
V
A
, V
B
, V
W
C
A
, C
B
C
W
I
CM
f = 1 kHz, measured to GND,
code = half scale
f = 1 kHz, measured to GND,
code = half scale
V
A
= V
B
= V
DD
/2
85
95
0.01
1
µA
Rev. D | Page 3 of 28
AD5251/AD5252
Parameter
DIGITAL INPUTS AND OUTPUTS
Input Logic High
Input Logic Low
Output Logic High (SDA)
Output Logic Low (SDA)
WP Leakage Current
A0 Leakage Current
Input Leakage Current
(Other than WP and A0)
Input Capacitance
5
POWER SUPPLIES
Single-Supply Power Range
Dual-Supply Power Range
Positive Supply Current
Negative Supply Current
EEMEM Data Storing Mode Current
EEMEM Data Restoring Mode
Current
6
Power Dissipation
7
Power Supply Sensitivity
DYNAMIC CHARACTERISTICS
5, 8
Bandwidth –3 dB
Total Harmonic Distortion
V
W
Settling Time
Resistor Noise Voltage
Digital Crosstalk
Analog Coupling
1
2
Data Sheet
Symbol
V
IH
V
IL
V
OH
V
OL
I
WP
I
A0
I
I
C
I
V
DD
V
DD
/V
SS
I
DD
I
SS
I
DD_STORE
I
DD_RESTORE
P
DISS
PSS
V
SS
= 0 V
V
IH
= V
DD
or V
IL
= GND
V
IH
= V
DD
or V
IL
= GND, V
DD
= 2.5 V,
V
SS
= –2.5 V
V
IH
= V
DD
or V
IL
= GND
V
IH
= V
DD
or V
IL
= GND
V
IH
= V
DD
= 5 V or V
IL
= GND
ΔV
DD
= 5 V ± 10%
ΔV
DD
= 3 V ± 10%
R
AB
= 1 kΩ
V
A
= 1 V rms, V
B
= 0 V, f = 1 kHz
V
A
= V
DD
, V
B
= 0 V
R
WB
= 500 Ω, f = 1 kHz
(thermal noise only)
V
A
= V
DD
, V
B
= 0 V, measure V
W
with
adjacent RDAC making full-scale
change
Signal input at A1 and measure the
output at W3, f = 1 kHz
2.7
±2.25
5
–5
35
2.5
0.075
+0.025
+0.04
Conditions
V
DD
= 5 V, V
SS
= 0 V
V
DD
/V
SS
= 2.7 V/0 V or V
DD
/V
SS
= ± 2.5 V
V
DD
= 5 V, V
SS
= 0 V
R
PULL-UP
= 2.2 kΩ to V
DD
= 5 V, V
SS
= 0 V
R
PULL-UP
= 2.2 kΩ to V
DD
= 5 V, V
SS
= 0 V
WP = V
DD
A0 = GND
V
IN
= 0 V or V
DD
Min
2.4
2.1
0.8
4.9
0.4
8
3
±1
5
5.5
±2.75
15
–15
Typ
1
Max
Unit
V
V
V
V
V
µA
µA
µA
pF
V
V
µA
µA
mA
mA
mW
%/%
%/%
MHz
%
µs
nV/√Hz
dB
dB
−0.025
–0.04
+0.010
+0.02
4
0.05
0.2
3
–80
–72
BW
THD
t
S
e
N_WB
C
T
C
AT
Typical values represent average readings at 25°C and V
DD
= 5 V.
Resistor position nonlinearity error (R-INL) is the deviation from an ideal value measured between the maximum and minimum resistance wiper positions. R-DNL is the
relative step change from an ideal value measured between successive tap positions. Parts are guaranteed monotonic, except R-DNL of AD5252 1 kΩ version at V
DD
=
2.7 V, I
W
= V
DD
/R for both V
DD
= 3 V and V
DD
= 5 V.
3
INL and DNL are measured at V
W
with the RDAC configured as a potentiometer divider, similar to a voltage output digital-to-analog converter. V
A
= V
DD
and V
B
= 0 V.
DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions.
4
Resistor Terminal A, Terminal B, and Terminal W have no limitations on polarity with respect to each other.
5
Guaranteed by design and not subject to production test.
6
Command 0 NOP should be activated after Command 1 to minimize I
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