Datasheet

AD5272/AD5274 Data Sheet
Rev. D | Page 6 of 28
Parameter Symbol Test Conditions/Comments Min Typ
1
Max Unit
DYNAMIC CHARACTERISTICS
5, 11
Bandwidth −3 dB, R
AW
= 10 kΩ, Terminal W, see Figure 41 kHz
R
AW
= 20 kΩ 300
R
AW
= 50 kΩ 120
R
AW
= 100 kΩ
60
Total Harmonic Distortion V
A
= 1 V rms, f = 1 kHz, code = half scale dB
R
AW
= 20 kΩ −90
R
AW
= 50 kΩ −88
R
AW
= 100 kΩ −85
Resistor Noise Density Code = half scale, T
A
= 25°C, f = 10 kHz nV/√Hz
R
AW
= 20 kΩ 13
R
AW
= 50 kΩ 25
R
AW
= 100 kΩ 32
1
Typical specifications represent average readings at 25°C, V
DD
= 5 V, and V
SS
= 0 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.
3
The maximum current in each code is defined by IAW = (V
DD
− 1)/R
AW
.
4
The terms, resistor performance mode and R-Perf mode, are used interchangeably. See the Resistor Performance Mode section.
5
Guaranteed by design and not subject to production test.
6
See Figure 24 for more details.
7
Resistor Terminal A and Resistor Terminal W have no limitations on polarity with respect to each other. Dual-supply operation enables ground referenced bipolar
signal adjustment.
8
Different from operating current, the supply current for the fuse program lasts approximately 55 ms.
9
Different from operating current, the supply current for the fuse read lasts approximately 500 ns.
10
P
DISS
is calculated from (I
DD
× V
DD
) + (I
SS
× V
SS
).
11
All dynamic characteristics use V
DD
= +2.5 V, V
SS
= −2.5 V.
Table 5. AD5274 Resistor Performance Mode Code Range
Resistor Tolerance per Code |V
DD
− V
SS
| = 4.5 V to 5.5 V |V
DD
− V
SS
| = 2.7 V to 4.5 V
R-TOLERANCE
1% R-Tolerance From 0x1E to 0xFF From 0x32 to 0xFF
2% R-Tolerance From 0x0F to 0xFF From 0x19 to 0xFF
3% R-Tolerance From 0x06 to 0xFF From 0x0E to 0xFF
Table 6. AD5274 50 kΩ and 100 kΩ Resistor Performance Mode Code Range
Resistor Tolerance per Code R
AW
= 50 kΩ R
AW
= 100 kΩ
R-TOLERANCE
1% R-Tolerance From 0x1E to 0xFF From 0x14 to 0xFF
2% R-Tolerance From 0x14 to 0xFF From 0x0F to 0xFF
3% R-Tolerance From 0x0A to 0xFF From 0x0A to 0xFF