OPA277P - 36V Precision Operational Amplifier | Texas Instruments
부품 번호: OPA277P ✓ 활성OPA277P 개요
An operational amplifier is a high-gain differential amplifier used to amplify small voltage signals while rejecting common-mode disturbances. The OPA277 belongs to the precision operational amplifier hierarchy, which sits below the broader amplifier and analog semiconductor categories. Its bipolar input stage supports accurate amplification across industrial signal chains where rail-to-rail input performance is not essential, but low offset and drift are important.
The primary specifications distinguish the OPA277 from general-purpose amplifiers. The 10 µV offset limit reduces output error in low-level instrumentation, while the 0.1 µV/°C maximum drift limits sensitivity to temperature changes. Its 1 MHz gain-bandwidth product supports moderate closed-loop bandwidth, and the verified distributor specifications identify a 0.8 V/µs slew rate and a 2 V to 18 V supply specification in addition to the 5 V to 15 V operating range shown for the device.
OPA277P is a single-amplifier circuit in an 8-pin PDIP package, even though the manufacturer product-page search result describes the broader OPA277 family as dual-channel. The P suffix identifies the PDIP configuration. Because this is a through-hole precision part, it is particularly suitable for laboratory prototypes, educational instruments, legacy industrial equipment, and custom measurement modules where PCB real estate is not the primary constraint.
Typical uses include precision current-to-voltage conversion, low-level sensor amplification, bridge-transducer signal conditioning, laboratory reference buffers, and general feedback-control circuits. Its low offset and drift are valuable when the system must preserve small signals over temperature, while its 1 MHz bandwidth is adequate for instrumentation and control paths that do not require high-speed signal processing.
Designers should verify the exact input common-mode range, output swing, input bias current, noise specifications, shutdown behavior, and absolute maximum ratings in the manufacturer datasheet before finalizing a design. Decoupling, grounding, input bias-current return paths, and output-load stability remain important even for a precision amplifier operating at relatively low bandwidth.
This page consolidates verified manufacturer information, distributor pricing, same-package replacement information, application guidance, and practical design notes. It also distinguishes confirmed replacement data from engineering parameters that remain unavailable in the supplied search results, helping engineers make a more defensible selection.
드롭인 대체품: OPA277P — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
OPA277UA
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
OPA277U
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →OPA277P 최대 정격 & 전기적 특성
| Amplifier Type | Single precision operational amplifier |
| Maximum Supply Voltage | 36 V |
| Input Offset Voltage | 10 µV maximum |
| Input Offset Voltage Drift | 0.1 µV/°C maximum |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 0.8 V/µs |
| Supply Voltage Range | 2 V to 18 V |
| 동작 공급 전압 | 5 V to 15 V |
| Technology | Bipolar |
| Circuit Count | 1 amplifier |
| 패키지 | 8-pin PDIP (P), 0.300 inch (7.62 mm) pitch |
| 실장 유형 | Through-hole |
| RoHS 상태 | unknown |
| REACH Status | unknown |
OPA277P 8-pin pdip (p), 0.300 inch (7.62 mm) pitch 핀 구성 가이드
OPA277P(8-pin pdip (p), 0.300 inch (7.62 mm) pitch 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: OPA277P.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
OPA277P 적합 용도: 6 애플리케이션s: Precision Bridge-Sensor Amplification, Laboratory Instrumentation, Current-to-Voltage Conversion, Industrial Sensor Signal Conditioning, Precision Voltage Buffering, Analog Feedback Control.
Precision Bridge-Sensor Amplification
OPA277P fits low-level bridge-transducer front ends because its 10 µV maximum input offset voltage and 0.1 µV/°C maximum drift limit help preserve small differential signals in instrumentation systems. The device can provide differential-to-single-ended conversion and configurable gain around an analog signal path with a 1 MHz gain-bandwidth product. Install it close to the bridge input so long, high-impedance traces do not increase pickup or introduce additional error. Verify the bridge excitation voltage, common-mode range, input bias current, and output swing in the manufacturer datasheet because those values were not included in the supplied results.
추천
Laboratory Instrumentation
OPA277P is appropriate for laboratory source, monitor, and measurement circuits that benefit from low dc error without requiring a high-speed amplifier. Its 10 µV input offset specification and 0.1 µV/°C drift rating reduce the contribution of the amplifier to slowly varying measurement errors. The 1 MHz gain-bandwidth product is sufficient for moderate-bandwidth control and buffer functions, while the 8-pin PDIP package is convenient for breadboards, prototype boards, and educational instrumentation. A grounded guard or shield can be useful around high-impedance inputs, but the final layout should follow the manufacturer recommendations.
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Current-to-Voltage Conversion
OPA277P can serve as the precision feedback amplifier in a current-to-voltage converter, including photodiode, electrochemical-cell, and current-output sensor interfaces. Low offset reduces error near the zero-current operating point, and low drift improves stability when the converted signal is small or measured over a broad temperature range. Its 0.8 V/µs slew rate can reproduce moderate-frequency sensor waveforms without demanding the bandwidth of a dedicated fast transimpedance amplifier. Designers must confirm input bias current, common-mode range, output compliance, noise density, and stability with the selected feedback resistor and sensor capacitance.
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Industrial Sensor Signal Conditioning
OPA277P is useful in industrial sensor-conditioning modules where small differential signals must be amplified before digitization or control processing. Its 10 µV offset limit and 0.1 µV/°C drift rating improve dc accuracy, while its 1 MHz bandwidth supports many process-control and diagnostic signals. The bipolar architecture and PDIP package are appropriate for legacy equipment and new through-hole prototype boards. For factory deployment, use grounded or shielded connections, maintain a quiet reference return, and check operating-temperature and compliance information because these were not supplied in the verified search results.
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Precision Voltage Buffering
OPA277P can buffer a reference or precision voltage source when output offset and temperature drift are more important than rail-to-rail operation. Its low dc-error characteristics help preserve the accuracy of references, sensor excitation rails, and command voltages. The 36 V maximum supply rating provides headroom for higher-voltage instrumentation, but the verified operating information should be respected rather than treating the maximum rating as a continuous operating point. Confirm output current, capacitive-load stability, input bias current, and common-mode limits in the manufacturer datasheet before using the device directly at a rail extreme.
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Analog Feedback Control
OPA277P can support low-level analog feedback loops in power-control, servo, or active-filter systems where offset drift would otherwise create static error. Its 1 MHz gain-bandwidth product and 0.8 V/µs slew rate are adequate for many slow-to-moderate control loops, while its precision dc characteristics improve the loop's resting accuracy. Care is required when the loop contains long time constants or requires phase margin across component and temperature tolerances. Validate noise, gain stability, output loading, and maximum output current against the specific loop before finalizing component values and compensation.
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추천 제품 요약
엔지니어링 참조 데이터: OPA277P — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | OPA277UA | OPA277U |
|---|---|---|---|
| Package | 8-pin PDIP (P) | PDIP-8 | PDIP-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Technology | Bipolar precision operational amplifier | Bipolar OPA277-family amplifier | Bipolar OPA277-family amplifier |
주요 차별점
- Lower noise than OPA277UA (vs OPA277UA)
- Higher speed than OPA277UA (vs OPA277UA)
- Lower quiescent consumption than OPA277UA (vs OPA277UA)
- Wider output-voltage swing than OPA277UA (vs OPA277UA)
설계 노트
Place local supply bypass capacitors close to the OPA277P power pins and provide a low-impedance ground return. For precision low-level inputs, keep sensitive traces short, avoid routing them parallel to power or switching-current paths, and use a quiet analog ground strategy where the system architecture permits it. The verified results do not specify recommended capacitor values, so use the manufacturer datasheet and stability guidance rather than selecting arbitrary values.
Do not confuse the verified 36 V maximum supply rating with the specified 2 V to 18 V operating range, and do not assume rail-to-rail input or output operation. Before using OPA277P at a rail extreme, verify input common-mode range and output swing in the manufacturer datasheet. Also avoid using the 10 µV offset rating as a complete system-accuracy specification because resistor tolerances, bias current, noise, thermal gradients, and reference accuracy may dominate the final error.
OPA277P's 1 MHz gain-bandwidth product makes feedback impedance and stray capacitance important at moderate operating frequencies. Check stability with the intended source and load impedances, especially when using high-value feedback resistors or driving capacitive loads. If an output buffer is added, verify that it does not introduce additional offset or noise that erases the benefit of using a precision amplifier in the first place.
Although the verified data does not include thermal resistance or maximum junction temperature, precision measurements still require attention to temperature gradients. Locate the amplifier away from regulators, relays, processors, and other heat sources when possible, and use symmetrical board placement if offset drift is critical. Confirm the operating-temperature range and power dissipation limits in the manufacturer datasheet before specifying the part for temperature-controlled or automotive environments.
규정 준수 정보
The supplied verified results do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for OPA277P. No compliance claims were inferred.
