LT1101CH - Precision Micropower Instrumentation Amplifier | Analog Devices
부품 번호: LT1101CH ✓ 활성LT1101CH 개요
An instrumentation amplifier is a specialized amplifier category optimized for measuring small differential signals while rejecting common-mode voltage. The LT1101CH belongs to the broader precision-amplifier hierarchy, combining low power consumption with fixed-gain operation. This makes it useful where a sensor output must be amplified and measured accurately without adding a separate precision gain stage.
The LT1101CH provides fixed gains of 10 and 100, allowing designers to match amplification to the input-signal range. Its micropower operating characteristics are particularly valuable in portable instrumentation powered from a single 5 V supply or battery source. Operation from dual ±15 V supplies also supports higher-level laboratory and industrial signal chains. The manufacturer specifies the device for both single- and dual-supply conditions, enabling one amplifier family to cover different measurement environments.
The LT1101 architecture is intended for differential signal conditioning, where common-mode rejection and stable closed-loop gain help preserve measurement accuracy. Fixed gain reduces external resistor-network sensitivity and simplifies calibration, although the LT1101CH does not offer the user-adjustable gain flexibility of general-purpose three-op-amp instrumentation amplifiers. Circuit design must therefore account for the fixed gain and the manufacturer’s recommended input, output, and supply-bypass connections.
Typical applications include battery-powered sensor interfaces, biomedical instrumentation, industrial process measurement, portable test equipment, and low-level bridge or transducer signal amplification. A single-supply implementation is particularly suitable for compact instruments that cannot accommodate negative rails. The device can also serve in higher-voltage laboratory systems operated from ±15 V supplies when the common-mode and output ranges remain within the specified limits.
When selecting a PCB footprint, verify the physical lead arrangement against the manufacturer’s TO-5 pin configuration because the 8-terminal package is not interchangeable with standard 3-lead TO-92 devices. Input shielding, short analog traces, stable reference or excitation connections, and local supply decoupling help preserve the benefit of a precision fixed-gain amplifier. The input common-mode range and output-swing limits must be checked against the actual sensor and supply voltages.
This product page combines the manufacturer’s supply and gain information with practical guidance on signal conditioning, footprint selection, power architecture, and replacement sourcing. It also distinguishes the LT1101CH from other fixed-gain and adjustable-gain instrumentation amplifiers so engineers can choose a part that matches the required package, gain, supply voltage, and measurement precision.
드롭인 대체품: LT1101CH — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청LT1101CH 최대 정격 & 전기적 특성
| Product Type | Precision micropower instrumentation amplifier |
| Fixed Gain | 10 or 100 |
| Number of Circuits | 1 circuit |
| Single-Supply Operation | 5 V |
| Dual-Supply Operation | ±15 V |
| Lithium-Cell Operation | 1 lithium cell |
| Ni-Cad Battery Operation | 2 Ni-Cad batteries |
| 패키지 | 8-terminal TO-5, round metal package |
| Terminal Count | 8 terminals |
| Terminal Form | Wire leads |
| Temperature Grade | Commercial |
LT1101CH 8-terminal to-5, round metal package 핀 구성 가이드
LT1101CH(8-terminal to-5, round metal package 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: LT1101CH.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
LT1101CH 적합 용도: 6 애플리케이션s: Battery-Powered Sensor Interface, Biomedical Instrument Front End, Industrial Process Measurement, Portable Test and Measurement, Dual-Supply Laboratory Amplifier, Precision Bridge and Transducer Measurement.
Battery-Powered Sensor Interface
The LT1101CH suits portable sensor-conditioning circuits because the manufacturer classifies it as a micropower instrumentation amplifier and specifies operation from a single 5 V supply, one lithium cell, or two Ni-Cad batteries. A bridge, strain gauge, or other low-level differential sensor can feed the instrumentation amplifier, whose fixed gain of 10 or 100 amplifies the differential result while rejecting common-mode variation. Designers should verify the selected gain’s input common-mode range and output swing against the battery voltage, then include the manufacturer-recommended supply bypass and input-biasing arrangement. The main benefit is a compact signal chain without a separate fixed-gain stage, while the principal limitation is that changing sensitivity requires a different gain configuration or another amplifier.
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Biomedical Instrument Front End
The LT1101CH can serve as the differential input stage in battery-powered biomedical instrumentation when the selected gain of 10 or 100 matches the sensor output. The precision instrumentation-amplifier configuration is appropriate for small physiological or electrochemical signals, provided that the input common-mode voltage stays within the gain-specific limits and the output does not exceed the available swing. Low power is particularly important for devices worn for long periods or powered by limited battery capacity. The designer must account for patient-safety isolation, electrode protection, leakage, and noise filtering as separate system requirements; the amplifier’s precision characteristics alone do not establish medical compliance. Use the official pin description and single-supply reference configuration when defining the patient-connected front end.
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Industrial Process Measurement
The LT1101CH is appropriate for low-level process signals when the equipment can use a fixed gain of 10 or 100 and can tolerate the 8-terminal TO-5 footprint. Pressure, temperature, and chemical sensor outputs can be amplified differentially to improve rejection of common-mode noise present on long industrial wiring. The circuit should use short connections from the sensor, guarded or shielded input routing where appropriate, and decoupling close to the supply pins. Verify the sensor excitation range against the amplifier’s allowable input and output voltages because a fixed gain does not provide input overvoltage protection. The TO-5 package also requires careful mechanical layout around the round body and wire leads, but it can be useful where a through-hole instrumentation solution is preferred over a fine-pitch surface-mount device.
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Portable Test and Measurement
The LT1101CH fits portable instrumentation setups that need differential amplification from a single 5 V supply while maintaining a fixed, repeatable gain. It can condition outputs from pressure, current, or resistive sensors before conversion by an ADC or display system. The availability of gain-10 and gain-100 configurations allows the designer to match signal range without an adjustable resistor network, reducing setup ambiguity. Because the device is fixed-gain, measurement software should identify the selected version and account for that factor in calibration. Verify input offset, noise, and bandwidth in the manufacturer’s gain-specific tables, and keep the analog input path away from switching regulators and digital return currents to preserve the benefit of precision signal conditioning.
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Dual-Supply Laboratory Amplifier
The LT1101CH can be used in laboratory measurement systems operating from dual ±15 V supplies, where a fixed-gain differential stage simplifies the signal path. This arrangement is useful for bipolar sensor signals that would require additional level shifting in a single-supply design. The common-mode input and output-swing limits remain the primary design boundaries, so confirm them for the selected gain and load. Place input-referred shielding and bypass capacitors according to the manufacturer’s guidance, and avoid routing sensitive inputs beside high-energy or switching circuitry. Although the TO-5 package is larger than modern surface-mount instrumentation amplifiers, it remains practical for through-hole laboratory equipment where serviceability, leaded construction, and a straightforward mechanical footprint are useful priorities.
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Precision Bridge and Transducer Measurement
The LT1101CH can amplify differential outputs from resistive bridges and transducers when the excitation level and output span are compatible with gain-10 or gain-100 operation. Instrumentation-amplifier behavior helps reduce common-mode pickup from cables and nearby equipment, improving measurement repeatability. The fixed gain simplifies calibration and removes external gain-setting resistors, but it does not compensate for bridge imbalance, temperature drift, or excitation drift. Use a stable excitation source, limit cable length, and keep high-impedance input connections clean and short. Check whether the required bridge output remains within the gain-specific common-mode range throughout the full mechanical and electrical stimulus range rather than only at the nominal operating point.
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추천 제품 요약
엔지니어링 참조 데이터: LT1101CH — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Product Type | Precision micropower instrumentation amplifier |
| Fixed Gain | 10 or 100 |
| Single-Supply Operation | 5 V |
| Dual-Supply Operation | ±15 V |
| Battery Operation | 1 lithium cell or 2 Ni-Cad batteries |
| Package | 8-terminal TO-5 |
| Brand | Analog Devices |
| Temperature Grade | Commercial |
| Number of Circuits | 1 circuit |
| Mounting Form | Through-hole wire leads |
설계 노트
Use the official pin-description table when assigning tracks to the 8-terminal TO-5 package. A round metal package does not provide the obvious pin-one dot found on most molded ICs, so record the physical orientation and verify it again after board assembly. Keep differential inputs short, symmetrical, and away from switching nodes. Route the pair together over a continuous ground reference and place input-biasing or filtering components close to their associated amplifier pins.
Separate the LT1101CH signal path from high-current switching or relay return currents, and place supply bypass capacitors close to the device’s supply pins. For battery operation, check the minimum usable supply at the amplifier pins after accounting for cell variation, wiring resistance, and transient load steps. Verify the input common-mode range and output swing for the selected gain at every input and battery-voltage condition, especially when the output approaches either supply rail.
Do not treat an instrumentation amplifier with a similar gain as a drop-in substitute. A valid replacement must match the 8-terminal TO-5 pin arrangement and preserve the LT1101CH’s fixed gain, supply range, input bias current, common-mode limits, output swing, and bandwidth. Also confirm the commercial temperature-grade suffix and the exact gain configuration. Recheck calibration after any substitution because offset and gain error can differ even when the nominal gain is the same.
규정 준수 정보
No specific compliance declaration was identified for the LT1101CH ordering code. Confirm the current material and environmental declarations with Analog Devices before release to production.
