Datasheet

AD5235 Data Sheet
Rev. F | Page 4 of 32
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—25 kΩ, 250 kΩ VERSIONS
V
DD
= 2.7 V to 5.5 V, V
SS
= 0 V; V
DD
= 2.5 V, V
SS
= −2.5 V, V
A
= V
DD
, V
B
= V
SS
, −40°C < T
A
< +85°C, unless otherwise noted.
These specifications apply to versions with a date code 1209 or later.
Table 1.
Parameter Symbol Conditions Min Typ
1
Max Unit
DC CHARACTERISTICS—RHEOSTAT
MODE (All RDACs)
Resistor Differential Nonlinearity
2
R-DNL
R
WB
−1
+1
LSB
Resistor Integral Nonlinearity
2
R-INL R
WB
−2 +2 LSB
Nominal Resistor Tolerance ∆R
AB
/R
AB
−8 +8 %
Resistance Temperature Coefficient (∆R
AB
/R
AB
)/∆T × 10
6
35 ppm/°C
Wiper Resistance R
W
I
W
= 1 V/R
WB
, code = midscale
V
DD
= 5 V 30 60 Ω
V
DD
= 3 V 50 Ω
Nominal Resistance Match R
AB1
/R
AB2
±0.1 %
DC CHARACTERISTICS—
POTENTIOMETER DIVIDER MODE
(All RDACs)
Resolution N 10 Bits
Differential Nonlinearity
3
DNL −1 +1 LSB
Integral Nonlinearity
3
INL −1 +1 LSB
Voltage Divider Temperature
Coefficient
(∆V
W
/V
W
)/∆T × 10
6
Code = midscale 15 ppm/°C
Full-Scale Error V
WFSE
Code = full scale −6 0 LSB
Zero-Scale Error V
WZSE
Code = zero scale 0 4 LSB
RESISTOR TERMINALS
Terminal Voltage Range
4
V
A
, V
B
, V
W
V
SS
V
DD
V
Capacitance Ax, Bx
5
C
A
, C
B
f = 1 MHz, measured to GND,
code = midscale
11 pF
Capacitance Wx
5
C
W
f = 1 MHz, measured to GND,
code = midscale
80 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 38)
4.9 V
Output Logic Low
V
OL
I
OL
= 1.6 mA, V
LOGIC
= 5 V (see
Figure 38)
0.4
V
Input Current I
IL
V
IN
= 0 V or V
DD
±1 µA
Input Capacitance
5
C
IL
5 pF