Datasheet

AD5291/AD5292
Rev. D | Page 4 of 32
Parameter Symbol Conditions Min Typ
1
Max Unit
DYNAMIC CHARACTERISTICS
5, 10
Bandwidth BW −3 dB, code = half-scale kHz
R
AB
= 20 kΩ 520
R
AB
= 50 kΩ 210
R
AB
= 100 kΩ 105
Total Harmonic Distortion THD
W
V
A
= 1 V rms, V
B
= 0 V, f = 1 kHz dB
R
AB
= 20 kΩ −93
R
AB
= 50 kΩ −101
R
AB
= 100 kΩ −106
V
W
Settling Time t
S
V
A
= 30 V, V
B
= 0 V, ±0.5 LSB error
band, initial code = zero scale,
board capacitance = 170 pF
Code = full-scale, normal mode 750 ns
Code = full-scale, R-Perf mode 2.5 μs
Code = half-scale, normal mode μs
R
AB
= 20 kΩ 2.5
R
AB
= 50 kΩ 7
R
AB
= 100 kΩ 14
Code = half-scale, R-Perf mode μs
R
AB
= 20 kΩ 5
R
AB
= 50 kΩ 9
R
AB
= 100 kΩ 16
Resistor Noise Density e
N_WB
Code = half-scale, T
A
= 25°C, 0 kHz
to 200 kHz
nV/√Hz
R
AB
= 20 kΩ 10
R
AB
= 50 kΩ 18
R
AB
= 100 kΩ 27
1
Typical values represent average readings at 25°C, V
DD
= 15 V, V
SS
= −15 V, and V
LOGIC
= 5 V.
2
Resistor position nonlinearity error. R-INL is the deviation from an ideal value measured between the R
WB
at code 0x02 to code 0xFF or between R
WA
at code 0xFD to
code 0x00. R-DNL measures the relative step change from ideal between successive tap positions. The specification is guaranteed in resistor performance mode, with
a wiper current of 1 mA for V
A
< 12 V and 1.2 mA for V
A
≥ 12 V.
3
Resistor performance mode (see the Resistor Performance Mode section). The terms resistor performance mode and R-Perf mode are used interchangeably.
4
Guaranteed by design and characterization, not subject to production test.
5
INL and DNL are measured at V
WB
with the RDAC configured as a potentiometer divider similar to a voltage output DAC. V
A
= V
DD
and V
B
= 0 V. DNL specification limits
of ±1 LSB maximum are guaranteed monotonic operating conditions.
6
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.
7
Different from operating current; supply current for fuse program lasts approximately 550 μs.
8
Different from operating current; supply current for fuse read lasts approximately 550 μs.
9
P
DISS
is calculated from (I
DD
× V
DD
) + (I
SS
× V
SS
) + (I
LOGIC
× V
LOGIC
).
10
All dynamic characteristics use V
DD
= 15 V, V
SS
= −15 V, and V
LOGIC
= 5 V.
RESISTOR PERFORMANCE MODE CODE RANGE
Table 2.
R
AB
= 20 kΩ
|V
DD
− V
SS
| = 30 V to 33 V |V
DD
− V
SS
| = 26 V to 30 V |V
DD
− V
SS
| = 22 V to 26 V |V
DD
− V
SS
| = 21 V to 22 V
Resistor
Tolerance per
Code
R
WB
R
WA
R
WB
R
WA
R
WB
R
WA
R
WB
R
WA
1% R-Tolerance
From 0x5A
to 0xFF
From 0x00
to 0xA5
From 0x7D
to 0xFF
From 0x00
to 0x82
From 0x7D
to 0xFF
From 0x00
to 0x82
N/A N/A
2% R-Tolerance
From 0x23
to 0xFF
From 0x00
to 0xDC
From 0x2D
to 0xFF
From 0x00
to 0xD2
From 0x23
to 0xFF
From 0x00
to 0xDC
From 0x23
to 0xFF
From 0x00
to 0xDC
3% R-Tolerance
From 0x1E
to 0xFF
From 0x00
to 0xE1
From 0x19
to 0xFF
From 0x00
to 0xE6
From 0x17
to 0xFF
From 0x00
to 0xE8
From 0x17
to 0xFF
From 0x00
to 0xE8