Datasheet

Data Sheet AD5235
Rev. F | Page 5 of 32
Parameter Symbol Conditions Min Typ
1
Max Unit
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
7
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
8
P
DISS
V
IH
= V
DD
or V
IL
= GND 10 30 µW
Power Supply Sensitivity
5
P
SS
∆V
DD
= 5 V ± 10% 0.006 0.01 %/%
DYNAMIC CHARACTERISTICS
5, 9
Bandwidth BW −3 dB, R
AB
= 25 kΩ/250 kΩ 125/12 kHz
Total Harmonic Distortion THD
W
V
A
= 1 V rms, V
B
= 0 V,
f = 1 kHz, code = midscale
R
AB
= 25 kΩ
0.009
%
R
AB
= 250 kΩ 0.035 %
V
W
Settling Time t
S
V
A
= V
DD
, V
B
= 0 V, V
W
= 0.50% error
band, from zero scale to midscale
R
AB
= 25 kΩ 4 µs
R
AB
= 250 kΩ 36 µs
Resistor Noise Density
e
N_WB
R
AB
= 25 kΩ/250 kΩ
20/64
nV/√Hz
Crosstalk (C
W1
/C
W2
) C
T
V
A1
= V
DD
, V
B1
= V
SS
, measured V
W2
with V
W1
making full-scale change,
R
AB
= 25 kΩ/250 kΩ
30/60
nV-s
Analog Crosstalk C
TA
V
AB2
= 5 V p-p, f = 1 kHz, measured
V
W1
, Code 1 = midscale, Code 2 =
full scale, R
AB
= 25 kΩ/250 kΩ
−110/−100
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. I
WB = (VDD − 1)/RWB (see Figure 27).
3
INL and DNL are measured at V
W
with the RDAC configured as a potentiometer divider similar to a voltage output DAC. V
A
= V
DD
and V
B
= V
SS
. DNL specification limits of
±1 LSB maximum are guaranteed monotonic operating conditions (see Figure 28).
4
Resistor Terminal A, Resistor Terminal B, and Resistor Terminal W have no limitations on polarity with respect to each other. Dual-supply operation enables ground-
referenced bipolar signal adjustment.
5
Guaranteed by design and not subject to production test.
6
Common-mode leakage current is a measure of the dc leakage from any Terminal A, Terminal B, or Terminal W to a common-mode bias level of V
DD
/2.
7
EEMEM restore mode current is not continuous. Current is consumed while EEMEM locations are read and transferred to the RDAC register.
8
P
DISS
is calculated from (I
DD
× V
DD
) + (I
SS
× V
SS
).
9
All dynamic characteristics use V
DD
= +2.5 V and V
SS
= −2.5 V.