Datasheet

AD8224 Data Sheet
Rev. C | Page 6 of 28
V
S
+ = 5 V, V
S
− = 0 V, V
REF
= 2.5 V, T
A
= 25°C, G = 1, R
L
= 2 kΩ
1
, unless otherwise noted. Table 5 displays the specifications for an
individual instrumentation amplifier configured for a single-ended output or dual instrumentation amplifiers configured for differential
outputs as shown in Figure 63.
Table 5. Individual Amplifier in Single-Ended Configuration or Dual Amplifiers in Differential Output Configuration
2
, V
S
=+5 V
A Grade B Grade
Parameter Test Conditions Min Typ Max Min Typ Max Unit
COMMON-MODE REJECTION RATIO (CMRR)
CMRR DC to 60 Hz with
1 kΩ Source Imbalance
V
CM
= 0 to 2.5 V
G = 1 78 86 dB
G = 10 94 100 dB
G = 100
94
100
dB
G = 1000 94 100 dB
CMRR at 10 kHz
G = 1 74 80 dB
G = 10 84 90 dB
G = 100 84 90 dB
G = 1000
84
90
dB
NOISE RTI noise = √(e
ni
2
+ (e
no
/G)
2
)
Voltage Noise, 1 kHz V
S
= ±2.5 V
Input Voltage Noise, e
ni
V
IN
+, V
IN
− = 0 V, V
REF
= 0 V 14 14 17 nV/√Hz
Output Voltage Noise, e
no
V
IN
+, V
IN
− = 0 V, V
REF
= 0 V 90 90 100 nV/√Hz
RTI, 0.1 Hz to 10 Hz
G = 1 5 5 µV p-p
G = 1000 0.8 0.8 µV p-p
Current Noise
f = 1 kHz
1
1
fA/√Hz
VOLTAGE OFFSET RTI V
OS
= (V
OSI
) + (V
OSO
/G)
Input Offset, V
OSI
300 250 µV
Average TC
T = −40°C to +85°C
10
5
µV/°C
Output Offset, V
OSO
1200 800 µV
Average TC T = −40°C to +85°C 10 5 µV/°C
Offset RTI vs. Supply (PSR)
G = 1 86 86 dB
G = 10 96 100 dB
G = 100 96 100 dB
G = 1000 96 100 dB
INPUT CURRENT
Input Bias Current 25 10 pA
Over Temperature
3
T = −40°C to +85°C 300 300 pA
Input Offset Current 2 0.6 pA
Over Temperature
3
T = −40°C to +85°C 5 5 pA
REFERENCE INPUT
R
IN
40 40 kΩ
I
IN
V
IN
+, V
IN
− = 0 V 70 70 µA
Voltage Range −V
S
+V
S
−V
S
+V
S
V
Gain to Output
1 ±
0.0001
1 ±
0.0001
V/V