AD8220 查看數據表（PDF） - Analog Devices
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AD8220 Datasheet PDF : 28 Pages
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AD8220
Parameter
POWER SUPPLY
Operating Range
Quiescent Current
Over Temperature
TEMPERATURE RANGE
For Specified Performance
Operational4
Test Conditions
T = −40°C to +85°C
Min
±2.253
−40
−40
A Grade
Typ
Max
±18
750
850
+85
+125
B Grade
Min
Typ
Max
±2.253
±18
750
850
−40
+85
−40
+125
Unit
V
μA
μA
°C
°C
1 Differential and common-mode input impedance can be calculated from the pin impedance: ZDIFF = 2(ZPIN); ZCM = ZPIN/2.
2 The AD8220 can operate up to a diode drop below the negative supply but the bias current increases sharply. The input voltage range reflects the maximum
allowable voltage where the input bias current is within the specification.
3 At this supply voltage, ensure that the input common-mode voltage is within the input voltage range specification.
4 The AD8220 is characterized from −40°C to +125°C. See the Typical Performance Characteristics section for expected operation in this temperature range.
VS + = 5 V, VS− = 0 V, VREF = 2.5 V, TA = +25°C, G = 1, RL = 2 kΩ, unless otherwise noted.
Table 2.
Parameter
Test Conditions
A Grade
B Grade
Min
Typ
Max
Min
Typ
Max
COMMON-MODE REJECTION
RATIO (CMRR)
CMRR DC to 60 Hz with
1 kΩ Source Imbalance
VCM = 0 to 2.5 V
G=1
78
G = 10
94
G = 100
94
G = 1000
94
CMRR at 5 kHz
G=1
74
G = 10
84
G = 100
84
G = 1000
84
NOISE
Voltage Noise, 1 kHz
RTI noise = √(eni2 +
(eno/G)2)
Input Voltage Noise, eni
VIN+, VIN− = 0 V, VREF = 0 V
Output Voltage Noise, eno
RTI, 0.1 Hz to 10 Hz
VIN+, VIN− = 0 V, VREF = 0 V
G=1
G = 1000
Current Noise
f = 1 kHz
VOLTAGE OFFSET
Input Offset, VOSI
Average TC
T = −40°C to +85°C
Output Offset, VOSO
Average TC
T = −40°C to +85°C
86
100
100
100
80
90
90
90
14
90
5
0.8
1
300
10
800
10
14
17
90
100
5
0.8
1
200
5
600
5
Unit
dB
dB
dB
dB
dB
dB
dB
dB
nV√Hz
nV√Hz
μV p-p
μV p-p
fA/√Hz
μV
μV/°C
μV
μV/°C
Offset RTI vs. Supply (PSR)
G=1
G = 10
G = 100
G = 1000
86
86
dB
96
100
dB
96
100
dB
96
100
dB
Rev. 0 | Page 5 of 28
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