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AD5271BRMZ-100 bảng dữ liệu(PDF) 4 Page - Analog Devices

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Giải thích chi tiết về linh kiện  1024-/256-Position, 1% Resistor Tolerance Error, SPI Interface and 50-TP Memory Digital Rheostat
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AD5270/AD5271
Data Sheet
Rev. F | Page 4 of 24
Parameter
Symbol
Test Conditions/Comments
Min
Typ1
Max
Unit
Power Dissipation10
VIH = VDD or VIL = GND
5.5
µW
Power Supply Rejection Ratio5
PSRR
ΔVDD/ΔVSS = ±5 V ± 10%
dB
RAW = 20 kΩ
−66
−55
RAW = 50 kΩ
−75
−67
RAW = 100 kΩ
−78
−70
DYNAMIC CHARACTERISTICS5, 11
Bandwidth
−3 dB, RAW = 10 kΩ, Terminal W,
see
Figure 42
kHz
RAW = 20 kΩ
300
RAW = 50 kΩ
120
RAW = 100 kΩ
60
Total Harmonic Distortion
VA = 1 V rms, f = 1 kHz,
code = half scale
dB
RAW = 20 kΩ
−90
RAW = 50 kΩ
−88
RAW= 100 kΩ
−85
Resistor Noise Density
Code = half scale, TA = 25°C
nV/√Hz
RAW = 20 kΩ
13
RAW = 50 kΩ
25
RAW = 100 kΩ
32
1
Typical specifications represent average readings at 25°C, VDD = 5 V, and VSS = 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 = (VDD − 1)/RAW.
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 25 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
PDISS is calculated from (IDD × VDD) + (ISS × VSS).
11
All dynamic characteristics use VDD = +2.5 V, VSS = −2.5 V.
Table 2. AD5270—20 kΩ Resistor Performance Mode Code Range
Resistor Tolerance Per Code
|VDD − VSS| = 4.5 V to 5.5 V
|VDD − VSS| = 2.7 V to 4.5 V
R-TOLERANCE
1% R-Tolerance
From 0x078 to 0x3FF
From 0x0BE to 0x3FF
2% R-Tolerance
From 0x037 to 0x3FF
From 0x055 to 0x3FF
3% R-Tolerance
From 0x028 to 0x3FF
From 0x037 to 0x3FF
Table 3. AD5270—50 kΩ and 100 kΩ Resistor Performance Mode Code Range
Resistor Tolerance Per Code
RAW = 50 kΩ
RAW = 100 kΩ
R-TOLERANCE
1% R-Tolerance
From 0x078 to 0x3FF
From 0x04B to 0x3FF
2% R-Tolerance
From 0x055 to 0x3FF
From 0x032 to 0x3FF
3% R-Tolerance
From 0x032 to 0x3FF
From 0x019 to 0x3FF


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