Datasheet

Data Sheet AD5124/AD5144/AD5144A
Rev. A | Page 7 of 36
ELECTRICAL CHARACTERISTICS—AD5144 AND AD5144A
V
DD
= 2.3 V to 5.5 V, V
SS
= 0 V; V
DD
= 2.25 V to 2.75 V, V
SS
= −2.25 V to −2.75 V; V
LOGIC
= 1.8 V to 5.5 V, −40°C < T
A
< +125°C, unless
otherwise noted.
Table 3.
Parameter Symbol Test Conditions/Comments Min Typ
1
Max Unit
DC CHARACTERISTICS—RHEOSTAT
MODE (ALL RDACs)
Resolution N 8 Bits
Resistor Integral Nonlinearity
2
R-INL R
AB
= 10 kΩ
V
DD
≥ 2.7 V
−2
±0.2
+2
LSB
V
DD
< 2.7 V −5 ±1.5 +5 LSB
R
AB
= 100 kΩ
V
DD
≥ 2.7 V −1 ±0.1 +1 LSB
V
DD
< 2.7 V −2 ±0.5 +2 LSB
Resistor Differential Nonlinearity
2
R-DNL −0.5 ±0.2 +0.5 LSB
Nominal Resistor Tolerance ΔR
AB
/R
AB
−8 ±1 +8 %
Resistance Temperature Coefficient
3
(ΔR
AB
/R
AB
)/ΔT × 10
6
Code = full scale 35 ppm/°C
Wiper Resistance
3
R
W
Code = zero scale
R
AB
= 10 kΩ 55 125 Ω
R
AB
= 100 kΩ 130 400 Ω
Bottom Scale or Top Scale R
BS
or R
TS
R
AB
= 10 kΩ 40 80 Ω
R
AB
= 100 kΩ 60 230 Ω
Nominal Resistance Match R
AB1
/R
AB2
Code = 0xFF −1 ±0.2 +1 %
DC CHARACTERISTICS—POTENTIOMETER
DIVIDER MODE (ALL RDACs)
Integral Nonlinearity
4
INL
R
AB
= 10 kΩ −1 ±0.2 +1 LSB
R
AB
= 100 kΩ −0.5 ±0.1 +0.5 LSB
Differential Nonlinearity
4
DNL −0.5 ±0.2 +0.5 LSB
Full-Scale Error V
WFSE
R
AB
= 10 kΩ −2.5 −0.1 LSB
R
AB
= 100 kΩ −1 ±0.2 +1 LSB
Zero-Scale Error V
WZSE
R
AB
= 10 kΩ 1.2 3 LSB
R
AB
= 100 kΩ 0.5 1 LSB
Voltage Divider Temperature
Coefficient
3
(ΔV
W
/V
W
)/ΔT × 10
6
Code = half scale ±5 ppm/°C