OPA227P - 8MHz, 36V Low-Noise Op Amp | Texas Instruments
MPN： OPA227P ✓ 啟用中OPA227P 概覽
An operational amplifier is a voltage-feedback amplifier that uses high open-loop gain to amplify the difference between two input voltages. Within the broader semiconductor hierarchy, this precision operational amplifier belongs to analog signal-chain ICs used for instrumentation, buffering, current-to-voltage conversion, filtering, and low-level sensor amplification.
The verified OPA227 family data identifies 8 MHz bandwidth and 2.3 V/µs slew rate, combining useful AC performance with precision DC operation. Its ±2.5 V to ±18 V supply capability permits bipolar rails within the stated range and supports single-supply operation when configured appropriately. The OPA227P uses the same dual-lead 8-pin PDIP form associated with OPA227U.
OPA227 is positioned for applications requiring both AC and precision DC performance. Key selection considerations include noise, input offset voltage, common-mode range, output swing, supply voltage, stability with the selected feedback network, and the system noise gain. The P suffix identifies a PDIP package, while the U suffix identifies the surface-mount SOIC option.
Typical uses include precision bridge and transducer interfaces, low-level signal conditioning, buffered analog outputs, active filters, laboratory instrumentation, and power-supply feedback loops. In each circuit, the amplifier must remain stable at the intended closed-loop gain and operate without input or output saturation.
PCB design should preserve the integrity of high-impedance feedback nodes by keeping input and feedback traces short and minimizing parasitic capacitance. Bypass each supply connection close to the amplifier with suitable decoupling, and route return currents directly to the ground reference rather than through shared copper paths.
This page combines the verified Texas Instruments product information with practical package, selection, sourcing, and design guidance. Exact offset, noise-density, input-bias-current, common-mode, output-swing, and temperature values require the manufacturer datasheet because they were not supplied in the verified search data.
直接替換替代品，適用於 OPA227P — 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。
此系列的變體
與下列產品可直接替換的同系列型號： OPA227P （相同外形與佔位） — 差異在於 Gain-Bandwidth Product, Product Type.
此產品無可直接替換的替代品。
申請替代品OPA227P 最大額定值與電氣特性
| Product Type | Single operational amplifier |
| Amplifier Count | 1 circuit |
| Gain-Bandwidth Product | 8 MHz |
| Slew Rate | 2.3 V/µs |
| Supply Voltage Range | ±2.5 V to ±18 V |
| Total Supply Voltage | 36 V maximum across the stated ±18 V range |
| Package Type | 8-pin PDIP |
| 腳位數 | 8 pins |
| 安裝類型 | Through-hole |
| Product Category | Standard general-purpose precision amplifier |
OPA227P 8-pin pdip 腳位配置指南
OPA227P（8-pin pdip 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： OPA227P.
請參閱 資料表 以查看完整腳位配置。
典型應用
OPA227P 適用於 6 應用s: Precision Transducer Interface, Precision Data Acquisition Front End, Active Precision Filter, Precision Voltage Buffer, Power-Supply Feedback Control, Laboratory Instrumentation Amplifier.
Precision Transducer Interface
The OPA227P fits low-level transducer interfaces that need both accurate DC amplification and usable AC bandwidth. Texas Instruments describes the OPA227 as a high-precision amplifier combining low noise, wide bandwidth, and DC performance, while the verified part data confirms 8 MHz bandwidth and 2.3 V/µs slew rate. It can amplify a bridge or sensor output in a differential frontend, provided the selected gain and feedback network remain stable. Before finalizing the design, verify input offset, bias current, common-mode range, and output swing from the complete datasheet; those limits were not included in the supplied source excerpts.
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Precision Data Acquisition Front End
OPA227P is suitable as the analog amplifier immediately before a high-resolution ADC when the signal requires modest gain without sacrificing bandwidth. Its verified 8 MHz gain-bandwidth product supports loop design above simple unity gain, while 2.3 V/µs slew rate helps reduce distortion on fast steps. The amplifier must also keep the ADC input within the OPA227 output-swing limits, which are not supplied in the verified excerpts. Validate noise, offset, settling behavior, and settling-time requirements against the ADC acquisition window and the manufacturer datasheet.
推薦
Active Precision Filter
The OPA227P can implement active filtering where precision around DC and predictable AC behavior are both important. Its verified 8 MHz bandwidth supplies loop gain for common moderate-Q and multi-pole filter sections, and the 2.3 V/µs slew rate limits large-signal slew limitations compared with slower precision amplifiers. Component tolerances and op-amp open-loop gain directly affect cutoff accuracy and phase behavior. The complete datasheet must be checked for gain-bandwidth distribution, noise, stability, and output capability before using the device in a Sallen-Key or multiple-feedback topology.
推薦
Precision Voltage Buffer
OPA227P is appropriate for buffering a reference or low-impedance control signal when output isolation is more important than maximum drive into heavy loads. The manufacturer positions OPA227 for precision DC performance, and its verified 8 MHz bandwidth provides more loop gain than a purely low-bandwidth precision amplifier. Unity-gain stability and load behavior must nevertheless be confirmed from the complete family datasheet. Also check capacitive-load drive because an unbuffered output node connected to long PCB wiring can introduce parasitic capacitance and alter phase margin.
推薦
Power-Supply Feedback Control
OPA227P may be evaluated in a power-supply error-amplifier or feedback path when low-level error signals must be amplified without sacrificing response speed. Its 8 MHz bandwidth and 2.3 V/µs slew rate provide loop responsiveness, while the OPA227 family's precision focus can support DC error amplification. Compensation, output common-mode range, maximum output voltage, and stability with compensation components are decisive and were not supplied in the verified excerpts. Validate the complete loop against the converter topology before substituting it into an existing compensation network.
推薦
Laboratory Instrumentation Amplifier
OPA227P suits laboratory input conditioning where small sensor signals, low-level references, and calibration paths benefit from precision amplification. The verified 8 MHz bandwidth supports moderate-frequency measurements, and 2.3 V/µs slew rate helps preserve square-wave edge behavior. A practical instrument front end should shield high-impedance inputs, guard sensitive traces, and keep loop-gain paths compact to reduce leakage and interference. Confirm input bias current, offset drift, noise density, and common-mode limits in the datasheet because those values are necessary for a true measurement-error budget.
推薦
推薦產品摘要
工程參考資料，適用於 OPA227P — 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 |
|---|---|
| Package | 8-pin PDIP |
| Brand | Texas Instruments |
| Amplifier Count | 1 circuit |
| Gain-Bandwidth Product | 8 MHz |
| Slew Rate | 2.3 V/µs |
| Supply Voltage Range | ±2.5 V to ±18 V |
| Product Classification | Standard general-purpose precision amplifier |
| Mounting Type | Through-hole |
主要差異化特點
- Verified 8 MHz bandwidth (對比OPA227U)
- Through-hole precision-amplifier option (對比OPA227U)
- AC and DC positioning (對比OPA228)
設計說明
Keep the op-amp inputs, feedback resistors, and compensation components close to the package to minimize parasitic capacitance on high-impedance nodes. Place bypass capacitors near the supply pins and provide a direct return path to the circuit ground reference. For sensitive precision nodes, avoid routing beneath digital clocks, DC/DC converter nodes, or high-current return paths.
Design the feedback network around the verified 8 MHz gain-bandwidth product and 2.3 V/µs slew rate. Check phase margin at the lowest intended noise gain and simulate tolerance extremes before fabrication. A precision amplifier can still suffer oscillation if parasitic input capacitance, long traces, or capacitive loading exceeds the stability margin.
Do not infer offset, noise density, common-mode range, output swing, supply current, or temperature performance from the distributor snippets. Verify these limits in the current Texas Instruments OPA227 datasheet and the exact grade/orderable part. Confirm that the circuit's signal amplitude, supply rails, output load, and closed-loop gain satisfy all of those limits.
合規資訊
The verified excerpts do not state compliance or material-declaration status for the exact OPA227P orderable part. No compliance claim is inferred from generic product-family or distributor information.