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OP297FPZ Datasheet

  • OP297FPZ

  • Dual Low Bias Current Precision Operational Amplifier

  • 16頁

  • AD

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Dual Low
Bias Current
Precision Operational Amplifier
OP297
FEATURES
Low offset voltage: 50 渭V maximum
Low offset voltage drift: 0.6 渭V/擄C maximum
Very low bias current: 100 pA maximum
Very high open-loop gain: 2000 V/mV minimum
Low supply current (per amplifier): 625 渭A maximum
Operates from 鹵2 V to 鹵20 V supplies
High common-mode rejection: 120 dB minimum
60
PIN CONFIGURATION
OUTA
1
鈥揑NA
2
+INA
3
V鈥?/div>
4
A
B
8
7
6
5
V+
OUTB
00300-001
鈥揑NB
+INB
Figure 1.
V
S
= 鹵15V
V
CM
= 0V
40
INPUT CURRENT (pA)
APPLICATIONS
Strain gage and bridge amplifiers
High stability thermocouple amplifiers
Instrumentation amplifiers
Photocurrent monitors
High gain linearity amplifiers
Long-term integrators/filters
Sample-and-hold amplifiers
Peak detectors
Logarithmic amplifiers
Battery-powered systems
20
I
B
鈥?/div>
0
I
B
+
鈥?0
I
OS
鈥?0
鈥?0
鈥?5
GENERAL DESCRIPTION
The OP297 is the first dual op amp to pack precision perform-
ance into the space saving, industry-standard 8-lead SOIC
package. The combination of precision with low power and
extremely low input bias current makes the dual OP297 useful
in a wide variety of applications.
Precision performance of the OP297 includes very low offset,
under 50 渭V, and low drift, below 0.6 渭V/擄C. Open-loop gain
exceeds 2000 V/mV, ensuring high linearity in every application.
Errors due to common-mode signals are eliminated by the
common-mode rejection of over 120 dB, which minimizes
offset voltage changes experienced in battery-powered systems.
The supply current of the OP297 is under 625 渭A.
The OP297 uses a super-beta input stage with bias current
cancellation to maintain picoamp bias currents at all tempera-
tures. This is in contrast to FET input op amps whose bias
currents start in the picoamp range at 25擄C, but double for
every 10擄C rise in temperature, to reach the nanoamp range
above 85擄C. Input bias current of the OP297 is under 100 pA at
25擄C and is under 450 pA over the military temperature range
per amplifier. This part can operate with supply voltages as low
as 鹵2 V.
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
400
0
25
50
TEMPERATURE (擄C)
75
100
125
Figure 2. Low Bias Current over Temperature
1200 UNITS
T
A
= 25擄C
V
S
= 鹵15V
V
CM
= 0V
300
NUMBER OF UNITS
200
100
鈥?0
鈥?0
鈥?0
0
20
40
60
80
100
INPUT OFFSET VOLTAGE (碌V)
Figure 3. Very Low Offset
Combining precision, low power, and low bias current, the
OP297 is ideal for a number of applications, including instru-
mentation amplifiers, log amplifiers, photodiode preamplifiers,
and long term integrators. For a single device, see the
OP97;
for
a quad device, see the
OP497.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
漏2006 Analog Devices, Inc. All rights reserved.
00300-003
0
鈥?00 鈥?0
00300-002
鈥?0
鈥?5

OP297FPZ 產品屬性

  • 50

  • 集成電路 (IC)

  • Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

  • -

  • 通用

  • 2

  • -

  • 0.15 V/µs

  • 500kHz

  • -

  • 35pA

  • 50µV

  • 525µA

  • -

  • 4 V ~ 40 V，±2 V ~ 20 V

  • -40°C ~ 85°C

  • 通孔

  • 8-DIP（0.300"，7.62mm）

  • 8-PDIP

  • 管件

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