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LF256H データシート(PDF) 1 Page - Texas Instruments

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部品番号 LF256H
部品情報  JFET Input Operational Amplifiers
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ホームページ  http://www.ti.com
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LF256H データシート(HTML) 1 Page - Texas Instruments

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LF155, LF156, LF256, LF257
LF355, LF356, LF357
SNOSBH0D – MAY 2000 – REVISED NOVEMBER 2015
LFx5x JFET Input Operational Amplifiers
1 Features
2 Applications
1
Advantages
Precision High-Speed Integrators
Fast D/A and A/D Converters
Replace Expensive Hybrid and Module FET
Op Amps
High Impedance Buffers
Rugged JFETs Allow Blow-Out Free Handling
Wideband, Low Noise, Low Drift Amplifiers
Compared With MOSFET Input Devices
Logarithmic Amplifiers
Excellent for Low Noise Applications Using
Photocell Amplifiers
Either High or Low Source Impedance—Very
Sample and Hold Circuits
Low 1/f Corner
Offset Adjust Does Not Degrade Drift or
3 Description
Common-Mode Rejection as in Most
The LFx5x devices are the first monolithic JFET input
Monolithic Amplifiers
operational amplifiers to incorporate well-matched,
New Output Stage Allows Use of Large
high-voltage JFETs on the same chip with standard
bipolar transistors (BI-FET™ Technology). These
Capacitive Loads (5,000 pF) Without Stability
amplifiers
feature
low
input
bias
and
offset
Problems
currents/low offset voltage and offset voltage drift,
Internal Compensation and Large Differential
coupled with offset adjust, which does not degrade
Input Voltage Capability
drift or common-mode rejection. The devices are also
Common Features
designed
for
high
slew
rate,
wide
bandwidth,
extremely fast settling time, low voltage and current
Low Input Bias Current: 30 pA
noise and a low 1/f noise corner.
Low Input Offset Current: 3 pA
High Input Impedance: 1012
Ω
Device Information(1)
Low Input Noise Current: 0.01 pA/
√Hz
PART NUMBER
PACKAGE
BODY SIZE (NOM)
High Common-Mode Rejection Ratio: 100 dB
SOIC (8)
4.90 mm × 3.91 mm
LFx5x
TO-CAN (8)
9.08 mm × 9.08 mm
Large DC Voltage Gain: 106 dB
PDIP (8)
9.81 mm × 6.35 mm
Uncommon Features
(1) For all available packages, see the orderable addendum at
Extremely Fast Settling Time to 0.01%:
the end of the data sheet.
4
μs for the LFx55 devices
1.5
μs for the LFx56
Simplified Schematic
1.5
μs for the LFx57 (AV = 5)
Fast Slew Rate:
5 V/µs for the LFx55
12 V/µs for the LFx56
50 V/µs for the LFx57 (AV = 5)
Wide Gain Bandwidth:
2.5 MHz for the LFx55 devices
5 MHz for the LFx56
20 MHz for the LFx57 (AV = 5)
Low Input Noise Voltage:
20 nV/
√Hz for the LFx55
3 pF in LF357 series
12 nV/
√Hz for the LFx56
12 nV/
√Hz for the LFx57 (AV = 5)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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