amp03bj-883c Analog Devices, Inc., amp03bj-883c Datasheet - Page 7

• Manufacturer Part Number: amp03bj-883c
• Description: Precision, Unity-gain Differential Amplifier
• Manufacturer: Analog Devices, Inc.

Figure 8. Differential Input Voltage-to-Current Converter
for Low I
allowing I
Figure 9. Suitable Instrumentation Amplifier Requirements
Can Be Addressed by Using an Input Stage Consisting of A1,
A2, R1, and R2. The following matrix suggests a suitable
amplifier.
REV. F
+IN E
–IN E
2
1
OUT
R1
E
E
O
2
1
to be less than 1 pA.
. OP80EJ maintains 250 fA max input current,
A1
A2
R2
R2
AMP03
I
0
E
= (E
0
= (1 + 2R2/R1) (E
AMP03
1
– E
2
)/R
OP80EJ
2
– E
1
I
)
0
LOAD
R
E
0
OUTPUT
–7–
System Design
Requirement
Source Impedance Low, Need Low
Voltage Noise Performance
Source Impedance High
(R
Require Ultrahigh Input Impedance
Need Wider Bandwidth and High
Speed
Noise
S
≥ 15 kΩ). Need Low Current
Suggested Op Amp
For A1 and A2
OP27, OP37
OP227 (Dual Matched)
OP270 (Dual)
OP271
OP470
OP471
OP80
OP41
OP43
OP249
OP97
OP97
OP41
OP43
OP42
OP43
OP249
OP80
AMP03