Datasheet

ADN2850 Data Sheet
Rev. E | Page 4 of 28
Parameter Symbol Conditions Min Typ
1
Max Unit
CURRENT MONITOR TERMINALS
Current Sink at V
1
I
1
0.0001 10 mA
Current Sink at V
2
I
2
0.0001 10 mA
DYNAMIC CHARACTERISTICS
3, 7
Resistor Noise Density e
N_WB
Code= full scale
R
WB
= 25 kΩ/250 kΩ, T
A
= 25°C 20/64 nV/√Hz
Analog Crosstalk C
T
V
BX
= GND, Measured V
W1
with V
W2
=
1 V
RMS
, f = 1 kHz, Code 1 = midscale,
Code 2 = midscale,
R
WB
= 25 kΩ/250 kΩ
−95/−80
dB
1
Typicals represent average readings at 25°C and V
DD
= 5 V.
2
Resistor position nonlinearity error (R-INL) is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper
positions. R-DNL measures the relative step change from ideal between successive tap positions. The maximum current in each code is defined by I
WB = (VDD − 1)/RWB.
(see Figure 20).
3
Guaranteed by design and not subject to production test.
4
Common-mode leakage current is a measure of the dc leakage from any Terminal B, or Terminal W to a common-mode bias level of V
DD
/2.
5
EEMEM restore mode current is not continuous. Current is consumed while EEMEM locations are read and transferred to the RDAC register.
6
P
DISS
is calculated from (I
DD
× V
DD
) + (I
SS
× V
SS
).
7
All dynamic characteristics use V
DD
= +2.5 V and V
SS
= −2.5 V.