AD8220_15 Datasheet, PDF (5/28 Pages) Analog Devices – JFET Input Instrumentation Amplifier

AD8220
Parameter
POWER SUPPLY
Operating Range
Quiescent Current
Over Temperature
TEMPERATURE RANGE
For Specified
Performance
Test Conditions
TA
TOPR
TOPR
A Grade
B Grade
W Grade
Min Typ Max Min Typ Max Min Typ Max Unit
V
±2.25⁴
±18 ±2.25⁴
±18 ±2.25⁴
±18 μA
750
750
750
μA
850
850
1000 μA
−40
+85 −40
+85 −40
+125 °C
1 _{When the output sinks more than 4 mA, use a 47 pF capacitor in parallel with the load to prevent ringing. Otherwise, use a larger load, such as 10 kΩ.}
2 _{Differential and common-mode input impedance can be calculated from the pin impedance: ZDIFF = 2(ZPIN); ZCM = ZPIN/2.}
3 _{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.
4 _{At this supply voltage, ensure that the input common-mode voltage is within the input voltage range specification.}
VS + = 5 V, VS− = 0 V, VREF = 2.5 V, TA = 25°C, TOPR = −40°C to +85°C for A and B grades. TOPR = −40°C to +125°C for W grade, G = 1,
RL = 2 kΩ¹, unless otherwise noted.
Table 2.
Parameter
COMMON-MODE REJECTION
RATIO (CMRR)
CMRR DC to 60 Hz with
1 kΩ Source Imbalance
G=1
G = 10
G = 100
G = 1000
CMRR at 5 kHz
G=1
G = 10
G = 100
G = 1000
NOISE
Voltage Noise, 1 kHz
Input Voltage Noise, eni
Output Voltage Noise, eno
RTI, 0.1 Hz to 10 Hz
G=1
G = 1000
Current Noise
VOLTAGE OFFSET
Input Offset, VOSI
Average TC
Output Offset, VOSO
Average TC
Offset RTI vs. Supply (PSR)
G=1
G = 10
G = 100
G = 1000
Test Conditions
TA for A, B grades,
TOPR for W grade
VCM = 0 to 2.5 V
VCM = 0 to 2.5 V
RTI noise = √(eni2 +
(eno/G)²), TA
VS = ±2.5 V
VIN+, VIN− = 0 V, VREF =
0V
VIN+, VIN− = 0 V, VREF =
0V
f = 1 kHz
VOS = VOSI + VOSO/G
TA
TOPR
TA
TOPR
TA for A, B grades,
TOPR for W grade
A Grade
B Grade
W Grade
Min Typ Max Min Typ Max Min Typ Max Unit
78
86
77
dB
94
100
92
dB
94
100
92
dB
94
100
92
dB
74
80
72
dB
84
90
80
dB
84
90
80
dB
84
90
80
dB
14
14
17
14
nV/√Hz
90
90
100
90
nV/√Hz
5
0.8
1
−300
−10
−800
−10
5
0.8
1
+300
+10
+800
+10
−200
−5
−600
−5
5
0.8
1
+200
+5
+600
+5
−300
−10
−800
−10
μV p-p
μV p-p
fA/√Hz
+300
10
+800
+10
μV
μV/°C
μV
μV/°C
86
86
80
dB
96
100
92
dB
96
100
92
dB
96
100
92
dB
Rev. B | Page 5 of 28