Datasheet

AD5280/AD5282
Rev. C | Page 3 of 28
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
V
DD
= +15 V, V
SS
= 0 V or V
DD
= +5 V, V
SS
= −5 V; V
LOGIC
= 5 V, 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 NL
2
R-DNL R
WB
, V
A
= NC −1 ±1/4 +1 LSB
Resistor Nonlinearity
2
R-INL R
WB
, V
A
= NC −1 ±1/4 +1 LSB
Nominal Resistor Tolerance
3
ΔR
AB
T
A
= 25°C −30 +30 %
Resistance Temperature
Coefficient
(∆R
AB
/R
AB
)/∆T x 10
6
V
AB
= V
DD
, wiper = no connect 30 ppm/°C
Wiper Resistance R
W
I
W
= V
DD
/R, V
DD
= 3 V or 5 V 60 150 Ω
DC CHARACTERISTICS–POTENTIOMETER DIVIDER MODE (specifications apply to all VRs)
Resolution N 8 Bits
Integral Nonlinearity
4
INL −1 ±1/4 +1 LSB
Differential Nonlinearity
4
DNL −1 ±1/4 +1 LSB
Voltage Divider Temperature
Coefficient
(∆V
W
/V
W
)/∆T x 10
6
Code = 0x80 5 ppm/°C
Full-Scale Error V
WFSE
Code = 0xFF −2 −1 0 LSB
Zero-Scale Error V
WZSE
Code = 0x00 0 +1 +2 LSB
RESISTOR TERMINALS
Voltage Range
5
V
A
, V
B
, V
W
V
SS
V
DD
V
Capacitance A, B
6
C
A
, C
B
f = 5 MHz, measured to GND,
Code = 0x80
25 pF
Capacitance W
6
C
W
f = 1 MHz, measured to GND,
Code = 0x80
55 pF
Common-Mode Leakage I
CM
V
A
= V
B
= V
W
1 nA
Shutdown Current I
SHDN
5 μA
DIGITAL INPUTS AND OUTPUTS
Input Logic High V
IH
0.7 × V
L
V
L
+ 0.5 V
Input Logic Low V
IL
0 0.3 × V
L
V
Output Logic High (O
1
, O
2
) V
IH
4.9 V
Output Logic Low (O
1
, O
2
) V
IL
0.4 V
Input Current I
IL
V
IN
= 0 V or 5 V ±1 μA
Input Capacitance
6
C
IL
5 pF
POWER SUPPLIES
Logic Supply V
LOGIC
2.7 V
DD
V
Power Single-Supply Range V
DD RANGE
V
SS
= 0 V 4.5 16.5 V
Power Dual-Supply Range V
DD/SS RANGE
±4.5 ±5.5 V
Logic Supply Current I
LOGIC
V
LOGIC
= 5 V 60 μA
Positive Supply Current I
DD
V
IH
= 5 V or V
IL
= 0 V 0.1 1 μA
Negative Supply Current I
SS
0.1 1 μA
Power Dissipation
7
P
DISS
V
IH
= 5 V or V
IL
= 0 V, V
DD
= +5 V, V
SS
= −5
V
0.2 0.3 mW
Power Supply Sensitivity PSS 0.002 0.01 %/%
DYNAMIC CHARACTERISTICS
6, 8, 9
Bandwidth −3 dB BW_20K R
AB
= 20 kΩ, Code = 0x80 310 kHz
BW_50K R
AB
= 50 kΩ, Code = 0x80 150 kHz
BW_200K R
AB
= 200 kΩ, Code = 0x80 35 kHz