Datasheet

AD5231 Data Sheet
Rev. D | Page 4 of 28
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 2.7 10 µA
Negative Supply Current
I
SS
V
IH
= V
DD
or V
IL
= GND,
V
DD
= +2.5 V, V
SS
= −2.5 V
0.5
10
µA
EEMEM Store Mode Current I
DD
(store) V
IH
= V
DD
or V
IL
= GND,
V
SS
= GND, I
SS
≈ 0
40 mA
I
SS
(store) V
DD
= +2.5 V, V
SS
= −2.5 V −40 mA
EEMEM Restore Mode Current
7
I
DD
(restore) V
IH
= V
DD
or V
IL
= GND,
V
SS
= GND, I
SS
≈ 0
0.3 3 9 mA
I
SS
(restore) V
DD
= +2.5 V, V
SS
= −2.5 V −0.3 −3 −9 mA
Power Dissipation
8
P
DISS
V
IH
= V
DD
or V
IL
= GND 0.018 0.05 mW
Power Supply Sensitivity
5
P
SS
ΔV
DD
= 5 V ± 10% 0.002 0.01 %/%
DYNAMIC CHARACTERISTICS
5, 9
Bandwidth BW −3 dB, R
AB
= 10 kΩ/50 kΩ/
100 kΩ
370/85/44 kHz
Total Harmonic Distortion THD
W
V
A
= 1 V rms, V
B
= 0 V, f = 1 kHz,
R
AB
= 10 kΩ
0.045 %
V
A
= 1 V rms, V
B
= 0 V, f = 1 kHz,
R
AB
= 50 kΩ, 100 kΩ
0.022 %
V
W
Settling Time t
S
V
A
= V
DD
, V
B
= 0 V,
V
W
= 0.50% error band,
Code 0x000 to 0x200
for R
AB
= 10 kΩ/50 kΩ/100 kΩ
1.2/3.7/7 µs
Resistor Noise Voltage e
N_WB
R
WB
= 5 kΩ, f = 1 kHz 9 nV/√Hz
1
Typical values 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
W
~ 50 µA @ V
DD
= 2.7 V and I
W
~ 400 µA @ V
DD
= 5 V for the
R
AB
= 10 kΩ version, I
W
~ 50 µA for the R
AB
= 50 kΩ, and I
W
~ 25 µA for the R
AB
= 100 kΩ version (see Figure 26).
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 minimum are guaranteed monotonic operating condition (see Figure 27).
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 B–W to a common-mode bias level of V
DD
/2.
7
EEMEM restore mode current is not continuous. Current consumed while EEMEM locations are read and transferred to the RDAC register (see Figure 23). To minimize
power dissipation, a NOP Instruction 0 (0x0) should be issued immediately after Instruction 1 (0x1).
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.