AD8421ARZ-R7 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
AD8421ARZ-R7 Datasheet PDF : 28 Pages
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Data Sheet
AD8421
Parameter
Test Conditions/
Comments
Min
AR Grade
Typ
Max
BR Grade
Min
Typ
Max
Unit
POWER SUPPLY
Operating Range
Dual supply
±2.5
±18
±2.5
±18
V
Single supply
5
36
5
36
V
Quiescent Current
2
2.3
2
2.3
mA
Over Temperature
TA = −40°C to +85°C
2.6
2.6
mA
TEMPERATURE RANGE
For Specified Performance
−40
+85
−40
+85
°C
Operational5
−40
+125
−40
+125
°C
1 Total voltage noise = √(eni2 + (eno/G)2 + eRG2). See the Theory of Operation section for more information.
2 Total RTI VOS = (VOSI) + (VOSO/G).
3 These specifications do not include the tolerance of the external gain setting resistor, RG. For G > 1, add RG errors to the specifications given in this table.
4 Input voltage range of the AD8421 input stage only. The input range can depend on the common-mode voltage, differential voltage, gain, and reference voltage.
See the Input Voltage Range section for more details.
5 See the Typical Performance Characteristics section for expected operation between 85°C and 125°C.
ARM AND BRM GRADES
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
Over Temperature, G = 1
CMRR at 20 kHz
G=1
G = 10
G = 100
G = 1000
NOISE
Voltage Noise, 1 kHz1
Input Voltage Noise, eni
Output Voltage Noise, eno
Peak to Peak, RTI
G=1
G = 10
G = 100 to 1000
Current Noise
Spectral Density
Peak to Peak, RTI
VOLTAGE OFFSET2
Input Offset Voltage, VOSI
Over Temperature
Average TC
Output Offset Voltage, VOSO
Over Temperature
Average TC
Test Conditions/
Comments
Min
VCM = −10 V to +10 V
84
104
124
134
TA = −40°C to +85°C 80
VCM = −10 V to +10 V
80
90
100
100
VIN+, VIN− = 0 V
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 0.1 Hz to 10 Hz
VS = ±5 V to ±15 V
TA = −40°C to +85°C
TA = −40°C to +85°C
ARM Grade
Typ
Max
3
3.2
60
2
0.5
0.07
200
18
70
135
0.9
600
1
9
BRM Grade
Min
Typ
Max
Unit
92
dB
112
dB
132
dB
140
dB
90
dB
80
dB
90
dB
100
dB
100
dB
3
3.2
nV/√Hz
60
nV/√Hz
2
2.2
μV p-p
0.5
μV p-p
0.07
0.09
μV p-p
200
fA/√Hz
18
pA p-p
50
μV
135
μV
0.9
μV/°C
400
μV
1
mV
9
μV/°C
Rev. 0 | Page 5 of 28
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