Datasheet

Data Sheet ADN2850
Rev. E | Page 3 of 28
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)
Resolution N 10
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
WB
/R
WB
Code = full scale −8 +8 %
Resistance Temperature Coefficient
3
(∆R
WB
/R
WB
)/
∆T × 10
6
Code = full scale 35 ppm/°C
Wiper Resistance R
W
Code = half scale
V
DD
= 5 V 30 60 Ω
V
DD
= 3 V 50 Ω
Nominal Resistance Match
3
R
WB1
/R
WB2
Code = full scale ±0.1 %
RESISTOR TERMINALS
Terminal Voltage Range
3
V
B
, V
W
V
SS
V
DD
V
Capacitance Bx
3
C
B
f = 1 MHz, measured to GND,
code = half-scale
11 pF
Capacitance Wx
3
C
W
f = 1 MHz, measured to GND,
code = half-scale
80
pF
Common-Mode Leakage Current
3, 4
I
CM
V
W
= V
DD
/2 0.01 ±1 µA
DIGITAL INPUTS AND OUTPUTS
Input Logic
3
High V
IH
V
DD
= 5 V 2.4 V
V
DD
= 2.7 V 2.1 V
V
DD
= +2.5 V, V
SS
= −2.5 V 2.0 V
Low V
IL
V
DD
= 5 V 0.8 V
V
DD
= 2.7 V 0.6 V
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 25) 4.9 V
Output Logic Low V
OL
I
OL
= 1.6 mA, V
LOGIC
= 5 V (see Figure 25) 0.4 V
Input Current I
IL
V
IN
= 0 V or V
DD
±1 µA
Input Capacitance
3
C
IL
5 pF
POWER SUPPLIES
Single-Supply Power Range V
DD
V
SS
= 0 V 2.7 5.5 V
Dual-Supply Power Range
V
DD
/V
SS
±2.25
±2.75
V
Positive Supply Current I
DD
V
IH
= V
DD
or V
IL
= GND 2 5 µA
Negative Supply Current I
SS
V
DD
= +2.5 V, V
SS
= −2.5 V
V
IH
= V
DD
or V
IL
= GND −4 −2 µA
EEMEM Store Mode Current I
DD
(store) V
IH
= V
DD
or V
IL
= GND,
V
SS
= GND, I
SS
≈ 0
2 mA
I
SS
(store) V
DD
= +2.5 V, V
SS
= −2.5 V −2 mA
EEMEM Restore Mode Current
5
I
DD
(restore) V
IH
= V
DD
or V
IL
= GND,
V
SS
= GND, I
SS
≈ 0
320 µA
I
SS
(restore) V
DD
= +2.5 V, V
SS
= −2.5 V −320 µA
Power Dissipation
6
P
DISS
V
IH
= V
DD
or V
IL
= GND
10
30
µW
Power Supply Sensitivity
3
P
SS
∆V
DD
= 5 V ± 10%
0.006
0.01
%/%