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Product Detailed Parameters
- Description：LF157 - JFET INPUT OPERATIONAL A
- Series：-
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Amplifier Type：J-FET
- Number of Circuits：1
- Output Type：-
- Slew Rate：30V/µs
- Gain Bandwidth Product：15 MHz
- Current - Input Bias：100 µA
- Voltage - Input Offset：7 mV
- Current - Supply：-
- Current - Output / Channel：35 mA
- Voltage - Supply Span (Min)：-
- Voltage - Supply Span (Max)：44 V
- Operating Temperature：-55°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-99-8 Metal Can
- Supplier Device Package：TO-99-8
- -3db Bandwidth：-
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Overview
The LF157H is a precision operational amplifier manufactured by Rochester Electronics, LLC. It features a voltage-feedback architecture with a maximum input offset voltage of 7000 µV and a maximum bias current of 0.0001 µA at 25°C. The device operates within a temperature range of -55 °C to +125 °C and utilizes an MBCY8 metal can package. Internal frequency compensation ensures stability for closed-loop gains greater than or equal to five.
Feature Summary
- Precision low-bias design suitable for high-impedance signal processing
- Internal frequency compensation for stable operation in unity-gain configurations
- Military-grade temperature rating for extreme environmental reliability
Applications
- High-precision instrumentation amplifiers
- Low-drift integrator circuits
- Precision data acquisition front-ends
Procurement Notes
Verify the specific revision level and lot traceability upon receipt, as Rochester Electronics sources surplus components. Confirm that the MBCY8 package condition meets military specifications regarding seal integrity. Ensure compatibility with existing board layouts requiring through-hole metal can mounting before finalizing procurement orders.
Selection Notes
Select this component when ultra-low bias current and wide operating temperature ranges are critical. The internal compensation simplifies circuit design by eliminating external phase-lag networks. Consider the metal can package for superior thermal dissipation and shielding compared to plastic alternatives in harsh environments.
Part Context
This part belongs to the LF15x series of precision operational amplifiers. It shares architectural similarities with other JFET-input op-amps but distinguishes itself through specific offset voltage and bias current characteristics optimized for military applications. The manufacturer focuses on sustaining production for legacy systems requiring these exact performance metrics.
Replacement Considerations
Direct pin-compatible replacements may include other military-specification JFET op-amps from manufacturers like Analog Devices or Texas Instruments, provided they meet the same MBCY8 package and electrical parameter requirements.
