Datasheet

ADN2850 Data Sheet
Rev. E | Page 12 of 28
02660-023
CS (5V/DIV)
CLK (5V/DIV)
SDI (5V/DIV)
I
DD
(2mA/DIV)
V
DD
= 5V
T
A
= 25°C
Figure 18. I
DD
vs. Time when Storing Data to EEMEM
CODE (Decimal)
02660-025
100
1
0.01
1023
THEORECTICAL (I
WB_MAX
– mA)
0.1
10
896768640512384128 2560
T
A
= 25°C
R
WB
= 25kΩ
R
WB
= 250kΩ
Figure 19. I
WB_MAX
vs. Code
TEST CIRCUITS
Figure 20 to Figure 24 define the test conditions used in the Specifications section.
W
B
I
W
DUT
V
MS
02660-026
Figure 20. Resistor Position Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)
W
B
I
W
= V
DD
/R
NOMINAL
V
MS1
V
W
R
W
= V
MS1
/I
W
02660-028
Figure 21. Wiper Resistance
W
B
V
MS
V+ = V
DD
±10%
PSRR (dB) = 20 LOG
ΔV
DD
(
)
~
V
DD
PSS (%/%) =
V+
ΔV
MS
ΔV
DD
%
ΔV
MS
%
02660-029
I
W
= V
DD
/(R
NOMINAL
/ 2)
CODE = Mid Scale
Figure 22. Power Supply Sensitivity (PSS, PSRR)
+
–
DUT
0.1V
V
SS
TO V
DD
R
SW
=
0.1V
I
SW
I
SW
W
B
02660-033
Figure 23. Incremental On Resistance
DUT
V
SS
I
CM
W
B
V
DD
NC
V
CM
GND
NC = NO CONNECT
02660-034
Figure 24. Common-Mode Leakage Current