OPA77GP - 0.3V/us Precision Op Amp, 8-PDIP | Texas Instruments
MPN： OPA77GP ✓ 啟用中OPA77GP 概覽
An operational amplifier, or op amp, is the active building block at the center of analog signal chains. Its voltage-feedback topology compares two inputs and drives an output to reduce their difference. Within the wider hierarchy of semiconductor devices, an op amp belongs to the amplifier IC category, which sits within analog and mixed-signal integrated circuits. Instrumentation amplifiers, buffers, active filters, transimpedance circuits, and precision control loops are common applications built around this function.
The OPA77GP differentiates itself through its precision general-purpose positioning and a verified 0.3 V/µs slew rate. The eight-pin through-hole package supports prototyping, repair, educational instrumentation, and industrial analog boards where a socketed or leaded package is easier to assemble than a fine-pitch surface-mount package. The commercial temperature grade and DIP format also distinguish it from variants intended for automated SMT assembly or automotive qualification.
OPA77GP uses a bipolar operational-amplifier architecture according to the verified product summaries. Bipolar input stages are commonly selected when low input-offset behavior and predictable precision are priorities. The 0.3 V/µs slew rate determines how quickly the output can move through larger voltage changes, which matters when the amplifier drives capacitive loads or processes rapidly changing signals. Exact offset voltage, input-bias current, gain-bandwidth product, supply range, and common-mode limits were not included in the supplied source excerpts.
Typical uses include bridge-amplifier front ends, precision current sensing, laboratory measurement modules, low-frequency active filters, sensor signal conditioning, and closed-loop control. In these applications, the OPA77GP can amplify a small differential sensor signal while preserving the accuracy expected from a precision amplifier. Its 8-PDIP format is especially useful when a design must be manually assembled, repaired in the field, or implemented without fine-pitch production equipment.
Designers should verify the complete electrical limits and pin assignment against the manufacturer datasheet before finalizing a new circuit. Decoupling, input common-mode range, output swing, load stability, and supply-voltage limits are especially important for precision analog designs. The supplied excerpts do not provide complete numeric values for those parameters, so the manufacturer documentation remains the controlling engineering reference.
This product page consolidates verified distributor identification, package information, sourcing links, precision-op-amp application context, and drop-in candidate guidance. It also distinguishes verified facts from parameters that still require direct datasheet confirmation, helping engineers evaluate procurement and design fit without treating incomplete distributor excerpts as complete specifications.
直接替換替代品，適用於 OPA77GP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
OP77
✅ 直接替換📋 參考替代品（不在目錄中）
OPA177GP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA277GP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA377GP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA467GP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OPA77GP 最大額定值與電氣特性
| Amplifier Type | Precision operational amplifier |
| Number of Circuits | 1 circuit |
| Slew Rate | 0.3 V/µs |
| Architecture | Bipolar |
| Product Classification | Standard general-purpose amplifier |
| Package Type | 8-PDIP |
| 腳位數 | 8 pins |
| Terminal Count | 8 terminals |
| 安裝類型 | Through-hole |
| Temperature Grade | Commercial |
| Package Shape | Rectangular |
OPA77GP rectangular 腳位配置指南
OPA77GP（rectangular 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： OPA77GP.
請參閱 資料表 以查看完整腳位配置。
典型應用
OPA77GP 適用於 6 應用s: Precision Sensor Signal Conditioning, Bridge and Current-Sense Amplification, Laboratory Instrumentation, Precision Active Filtering, Industrial Feedback Control, Precision Buffering and Level Conditioning.
Precision Sensor Signal Conditioning
OPA77GP is appropriate for conditioning a low-level differential sensor signal in an instrumentation front end. Its verified single-amplifier configuration, bipolar architecture, and 0.3 V/µs slew rate support moderate-bandwidth measurement paths where accurate amplification must precede filtering or digitization. The amplifier can be placed in a differential stage with feedback resistors chosen for the required gain, while the 8-PDIP format simplifies manual assembly and field repair. Designers should verify input common-mode range, output swing, bias current, and offset limits in the manufacturer datasheet because these numerical specifications were not included in the supplied excerpts.
推薦
Bridge and Current-Sense Amplification
OPA77GP can serve in bridge or current-sense signal chains where a small differential voltage must be amplified accurately. The verified 0.3 V/µs slew rate gives the output sufficient dynamic range for many sensing and control-loop signals, while the commercial 8-PDIP package is convenient for laboratory and industrial test equipment. In a bridge amplifier, resistor matching directly affects gain and common-mode rejection, so the amplifier's verified input limitations and the bridge excitation voltage must be checked together. Complete offset, drift, bias-current, and common-mode ratings remain datasheet-dependent and were not present in the supplied source excerpts.
推薦
Laboratory Instrumentation
OPA77GP fits laboratory instrumentation prototypes that combine precision amplification with through-hole assembly. The 8-PDIP package can be socketed for easy replacement and is straightforward to route on a perforated or manually assembled board, reducing the need for fine-pitch SMT tooling. A useful circuit role is buffered amplification of a sensor or reference node before an ADC or measurement converter. The verified 0.3 V/µs slew rate supports many low-to-moderate-frequency measurements, but engineers must confirm gain-bandwidth product, input noise, output loading, and supply limits before defining the expected accuracy and bandwidth.
推薦
Precision Active Filtering
OPA77GP is suitable for active filters and analog signal-processing blocks where component tolerances and amplifier accuracy determine the achieved response. It can implement a second-order active-filter section or a gain stage preceding a filter, with the 0.3 V/µs slew rate helping preserve waveform shape at moderate signal frequencies and amplitudes. The 8-PDIP format favors educational, prototype, and repair-oriented equipment. Before finalizing the filter, verify the closed-loop stability conditions, output-current capability, capacitive-load behavior, and exact gain-bandwidth product in the manufacturer datasheet, since these numerical limits were not supplied in the verified excerpts.
推薦
Industrial Feedback Control
OPA77GP can be used as an error amplifier in a slow precision control loop, such as a current regulator, actuator controller, or analog feedback path. Its verified bipolar architecture and 0.3 V/µs slew rate are useful when the control signal changes at a moderate rate, while the through-hole package simplifies serviceable industrial control boards. Stable operation depends on the selected feedback network, output loading, and loop compensation rather than slew rate alone. Check the complete supply range, common-mode limits, output swing, and thermal behavior against the actual control circuit before deployment, particularly for industrial temperature requirements.
推薦
Precision Buffering and Level Conditioning
OPA77GP can buffer a high-impedance source or provide level conditioning between analog stages in test and control equipment. The verified 8-PDIP configuration and 0.3 V/µs slew rate make it practical for many moderate-frequency buffering tasks, especially where a socketed, leaded device simplifies maintenance. Buffering does not eliminate the need for a correct bias network: input bias current, offset voltage, input common-mode range, and output swing must remain within their datasheet limits for the source impedance and load. The supplied evidence did not include those numeric ratings, so they should be obtained from the current manufacturer document before the circuit is approved.
推薦
推薦產品摘要
工程參考資料，適用於 OPA77GP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | OP77 | OPA177GP | OPA277GP | OPA377GP | OPA467GP |
|---|---|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- Commercial 8-PDIP implementation (對比OPA177GP)
- Direct legacy-family replacement path (對比OP77)
- Newer precision option with quantified ratings (對比OPA177GP)
設計說明
Do not treat the 8-PDIP package as proof of electrical interchangeability. Verify supply voltage, common-mode input range, output swing, offset, drift, bias current, gain-bandwidth product, and stability requirements against the manufacturer datasheet. In particular, the supplied evidence gives OPA77GP a 0.3 V/µs slew rate but does not provide its complete input or output limits.
Place the amplifier close to the feedback resistors and sensitive input nodes to minimize parasitic pickup and board-level error. Keep the ground return short, provide local supply bypassing according to the manufacturer recommendations, and avoid routing high-impedance input traces beneath noisy switching nodes. The through-hole 8-PDIP footprint is convenient for prototypes, but adequate copper and grounding remain necessary at precision signal levels.
Check output stability with the intended load, including cables, sensors, or ADC input capacitance. The verified 0.3 V/µs slew rate must not be treated as a substitute for the datasheet's gain-bandwidth and capacitive-load limits. If the load is difficult to drive, select isolation resistance or a buffer based on documented operating conditions rather than adding an arbitrary capacitor at the output.
Calculate worst-case power dissipation from the actual supply voltage, output voltage, and load current once those datasheet limits are confirmed. The supplied excerpts do not provide the OPA77GP supply range, quiescent current, or output-current limit, so a defensible thermal estimate cannot be produced. Validate the design with the manufacturer's maximum operating conditions and ensure the commercial temperature grade matches the intended environment.
合規資訊
The supplied excerpts identify a commercial-grade amplifier but do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable to the verified commercial-grade designation unless a separate automotive-qualified ordering code is selected.
