Datasheet

AD8597/AD8599 Data Sheet
Rev. E | Page 16 of 20
The AD8597/AD8599 are the optimum choice for low noise
performance if the source resistance is kept < 1 kΩ. At higher
values of source resistance, optimum performance with respect
to only noise is obtained with other amplifiers from Analog
Devices. Both voltage noise and current noise must be consi-
dered. For more information on avoiding noise from grounding
problems and inadequate bypassing, see the AN-345 Application
Note, Grounding for Low- and High-Frequency Circuits. For
general noise theory with extensive calculations, see the
AN-358 Application Note, Noise and Operational Amplifier
Circuits. A good selection table for low noise op amps can
be found in AN-940 Application Note, Low Noise Amplifier
Selection Guide for Optimal Noise Performance. An interesting
note on using one section of a monolithic dual to phase compen-
sate the other section is in the AN-107 Application Note, Active
Feedback Improves Amplifier Phase Accuracy.
06247-079
+
–
V+
V–
V
B
C1
Q36
Q32
R1
R31
R32
D2
D31
D34
OUTPUT
D3
6
INVERTING
INPUT
7
2
3
4
NONINVERTING
INPUT
D1
R18 R19
D2
D41
Q18 Q19
Q19
Q27
Q20
Q28
D42
D39
D40
Figure 59. Simplified Schematic