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LM394H
This product is a high-quality BJT transistor that is widely used in various electronic applicationsLM394H
This product is a high-quality BJT transistor that is widely used in various electronic applications
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製造商零件號 # : LM394H
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包裝/封裝: CAN-6
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製造商: Texas Instruments
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產品分類 : Single Bipolar Transistors
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LM394H 數據表
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詳細說明
The Bay Linear LM3940 is a 1.25A high accuracy, low dropout voltage regulator with only 40mV at light loads and 350mV(Typ.)@ 1.0A) and low quiescent current of 240µA typical.The LM3940 is designed for low voltage a application that requires lower dropout voltage and faster transient response. This device is an excellent choice for use in powering low voltage applications where require a lower dropout, faster transient response to regulate from +2.5V to 3.8V supplies and as a post regulator for switching supplies applications.The LM3940 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%.The LM3940 are offered in a 3-pin SOT-223, TO-220 & TO-263 package compatible with other 3 terminal regulators. The LM3940 is also offer in a new LPDD (Low Profile TO-263) package from 4.47 mm (DD) tickness down to only 1.27 mm (LPDD) total tickness.
主要特徵
- High output accuracy of 1%
- Fix Output 5.0v & 3.3V
- Output Current of 1.25A
- Low Dropout Voltage
- Low quiescent current
- Extremely Tight Load & Line Regulation
- Reverse-battery and “Load Dump” Protection
- Zero Current Shutdown Mode (5-pin version)
- Offer in TO-263, TO-252, TO-220, SOT-223, & New Slim LPDD
- Similar to industry Standard LM3940
應用
The LM394H is ideal for precision analog applications where matched transistor characteristics are crucial:
- Analog Signal Processing: Used in analog signal processing circuits where precise matching of transistors is required for accurate signal amplification and processing.
- Current Mirrors: Integrated into current mirror circuits to provide accurate and stable current references.
- Instrumentation Amplifiers: Applied in instrumentation amplifiers to ensure precise signal amplification and measurement accuracy.
- Audio Circuits: Utilized in audio amplification circuits where high precision and low noise are important for maintaining audio quality.
Equivalent Part
For similar functionalities, consider these alternatives to the LM394H:
- LM395: A matched pair transistor array offering similar performance and features for precision analog applications.
- BC560/BC550: Matched pairs of high-gain PNP transistors that can be used in similar applications requiring precision matching.
規格
以下是所選零件的基本參數，涉及零件的特性及其所屬類別。
| Part Life Cycle Code | Obsolete | Reach Compliance Code | |
| ECCN Code | EAR99 |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等，這對於作為器件特定應用的整體指南大有裨益。
常見問題解答
What is LM394H?
The LM394H is a precision monolithic operational amplifier designed by National Semiconductor, which is now part of Texas Instruments. It is known for its exceptional input offset voltage, input bias current, and input noise characteristics, making it suitable for precision analog signal processing applications.
How Does LM394H Work?
The LM394H operates as a precision operational amplifier with low offset voltage and low input bias current. It amplifies input signals with high accuracy and stability, making it suitable for precision measurement and signal conditioning applications. The amplifier features high open-loop gain and wide bandwidth, providing excellent dynamic performance.
How Many Pins does LM394H have and What are the Functions of the Pinout Configuration?
The LM394H is housed in an 8-pin TO-5 metal can package. The pinout configuration includes:
- Non-Inverting Input (+IN): The non-inverting input for the amplifier.
- Inverting Input (-IN): The inverting input for the amplifier.
- Output (OUT): The output of the amplifier.
- Offset Nulling: Pins for offset nulling to adjust the input offset voltage.
- NC (No Connection): No connection pin.
What are the Pros and Cons of LM394H?
Pros:
- Precision: Exceptional input offset voltage and input bias current characteristics for accurate signal processing.
- High Open-Loop Gain: Provides high gain for applications requiring amplification of low-level signals.
- Wide Bandwidth: Suitable for applications requiring high-frequency signal processing.
Cons:
- Package Type: TO-5 metal can package may not be as space-efficient as modern surface-mount packages.
- Voltage Limitations: Limited voltage supply range compared to newer operational amplifiers.
Are There Any Equivalents/Alternatives to LM394H for Recommendation?
- The LT1028 from Analog Devices is a precision operational amplifier with similar characteristics to the LM394H.
- Alternatives to the LM394H include the AD797 from Analog Devices and the OPA227 from Texas Instruments.
