Datasheet

AD5258
Rev. 0 | Page 3 of 24
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
DD
= V
LOGIC
= 5 V ± 10%, or 3 V ± 10%; 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 R-DNL R
WB
, V
A
= no connect
LSB
1 kΩ −1.5 ±0.3 +1.5
10 kΩ/50 kΩ/100 kΩ −0.25 ±0.1 +0.25
Resistor Integral Nonlinearity R-INL R
WB
, V
A
= no connect
LSB
1 kΩ −5 ±0.5 +5
10 kΩ/100 kΩ −0.5 ±0.1 +0.5
50 kΩ −0.25 ±0.1 +0.25
Nominal Resistor Tolerance T
A
= 25°C, V
DD
= 5.5 V
1 kΩ R
AB
0.9 1.5 kΩ
10 kΩ/50 kΩ/100 kΩ ∆R
AB
−30 +30 %
Resistance Temperature Coefficient (∆R
AB
× 10
6
)/(R
AB
× ∆T) Code = 0x00/0x20 200/15 ppm/°C
Total Wiper Resistance R
WB
Code = 0x00 75 350 Ω
DC CHARACTERISTICS:
POTENTIOMETER DIVIDER MODE
Differential Nonlinearity DNL LSB
1 kΩ −1 ±0.3 +1
10 kΩ/50 kΩ/100 kΩ −0.25 ±0.1 +0.25
Integral Nonlinearity INL LSB
1 kΩ −1 ±0.3 +1
10 kΩ/50 kΩ/100 kΩ −0.25 ±0.1 +0.25
Full-Scale Error V
WFSE
Code = 0x3F LSB
1 kΩ −6 −3 0
10 kΩ −1 −0.3 0
50 kΩ/100 kΩ −1 −0.1 0
Zero-Scale Error V
WZSE
Code = 0x00 LSB
1 kΩ 0 3 5
10 kΩ 0 0.3 1
50 kΩ/100 kΩ 0 0.1 0.5
Voltage Divider Temperature
Coefficient
(∆V
W
× 10
6
)/(V
W
× ∆T) Code = 0x00/0x20 120/15 ppm/°C
RESISTOR TERMINALS
Voltage Range V
A, B, W
GND V
DD
V
Capacitance A, B C
A, B
f = 1 MHz, measured to GND,
code = 0x20
45 pF
Capacitance W C
W
f = 1 MHz, measured to GND,
code = 0x20
60 pF
Common-Mode Leakage I
CM
V
A
= V
B
= V
DD
/2 10 nA
DIGITAL INPUTS AND OUTPUTS
Input Logic High V
IH
0.7 × V
L
V
L
+ 0.5 V
Input Logic Low V
IL
−0.5 0.3 × V
L
V
Leakage Current I
IL
µA
SDA, AD0, AD1 V
IN
= 0 V or 5 V 0.01 ±1
SCL – Logic High V
IN
= 0 V −2.5 −1.4 +1
SCL – Logic Low V
IN
= 5 V 0.01 ±1
Input Capacitance C
IL
5 pF