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OP297 датащи(PDF) 6 Page - Analog Devices

номер детали OP297
подробное описание детали  Dual Low Bias Current Precision Operational Amplifier
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

OP297 датащи(HTML) 6 Page - Analog Devices

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REV. E
–6–
OP297
FREQUENCY (Hz)
–40
100
1k
10M
10k
100
1M
VS = 15V
CL = 30pF
RL = 1M
TA = –55 C
TA = +125 C
GAIN
PHASE
–20
0
20
40
60
100
80
TPC 19. Open Loop Gain, Phase
vs. Frequency
LOAD CAPACITANCE (pF)
0
0
100
–EDGE
10
20
30
40
50
60
70
1000
10000
+EDGE
TA = 25 C
VS = 15V
AVCL = +1
VOUT = 100mV p-p
TPC 20. Small-Signal Over-
shoot vs. Load Capacitance
FREQUENCY (Hz)
1000
0.001
10
100
1k
100
10
0.01
0.1
1
10k
100k
1M
TA = 25 C
VS = 15V
TPC 21. Open Loop Output
Impedance vs Frequency
APPLICATIONS INFORMATION
Extremely low bias current over a wide temperature range makes
the OP297 attractive for use in sample-and-hold amplifiers,
peak detectors, and log amplifiers that must operate over a wide
temperature range. Balancing input resistances is unnecessary
with the OP297. Offset voltage and TCVOS are degraded only
minimally by high source resistance, even when unbalanced.
The input pins of the OP297 are protected against large differ-
ential voltage by back-to-back diodes and current-limiting
resistors. Common-mode voltages at the inputs are not restricted
and may vary over the full range of the supply voltages used.
The OP297 requires very little operating headroom about the
supply rails and is specified for operation with supplies as low as
2 V. Typically, the common-mode range extends to within 1 V
of either rail. The output typically swings to within 1 V of the
rails when using a 10 k
Ω load.
AC PERFORMANCE
The OP297’s ac characteristics are highly stable over its full
operating temperature range. Unity gain small-signal response is
shown in Figure 4. Extremely tolerant of capacitive loading on
the output, the OP297 displays excellent response with 1000 pF
loads (Figure 5).
10
0%
100
90
5 s
20mV
Figure 4. Small-Signal Transient Response
(CLOAD = 100 pF, AVCL = 1)
10
0%
100
90
5 s
20mV
Figure 5. Small-Signal Transient Response
(CLOAD = 1000 pF, AVCL = 1)
10
0%
100
90
5 s
20mV
Figure 6. Large-Signal Transient Response
(AVCL = 1)


Аналогичный номер детали - OP297_03

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Аналогичное описание - OP297_03

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