OPA640P - 1.3 GHz Wideband Op Amp | Texas Instruments
MPN： OPA640P ✓ 啟用中OPA640P 概覽
An operational amplifier is a voltage-feedback amplifier that uses high open-loop gain to amplify the voltage difference between its inverting and non-inverting inputs. Within the broader semiconductor hierarchy, the OPA640P is an analog linear IC, an operational amplifier, and a wideband voltage-feedback amplifier. Its combination of bandwidth, slew rate, and low noise distinguishes it from general-purpose precision amplifiers intended mainly for slow signal conditioning.
The OPA640P's 1.3 GHz unity-gain bandwidth supports wide closed-loop bandwidth when the surrounding feedback network permits it. Unity-gain stability means the amplifier can provide useful closed-loop operation without requiring a high noise-gain setting. Its 350 V/µs slew rate supports rapid signal transitions, while the specified 2.9 nV/√Hz noise density supports high-gain amplification of low-level analog signals.
The verified source material also identifies 85 dB common-mode rejection and emphasizes low harmonic distortion at 10 MHz. These characteristics matter when the amplifier processes small signals superimposed on larger common-mode voltages or when broadband nonlinear distortion would limit measurement accuracy. The OPA640P is a voltage-feedback device rather than a current-feedback amplifier, so its feedback network and stability behavior should be evaluated using the manufacturer's guidance.
Typical applications include broadband instrumentation, communications-interface signal conditioning, video amplification, active filtering, buffer stages, and gain blocks requiring more bandwidth than ordinary precision op amps provide. The wide operating capability can help designers preserve signal fidelity when analog stages must operate over a substantially higher frequency range than conventional audio-frequency amplifiers.
Designers should confirm the complete electrical limits, recommended supply voltages, common-mode range, output swing, input bias current, offset voltage, and stability network requirements in the manufacturer datasheet before production use. Because the verified excerpts do not provide the complete pin mapping or application circuit values, those details must not be inferred from the package description alone.
This page combines verified distributor information, distributor availability context, and manufacturer-style technical parameters for OPA640P selection. It also identifies where additional engineering data is required rather than presenting unverified specifications, ensuring that bandwidth, noise, slew-rate, packaging, and lifecycle decisions can be traced to available source material.
直接替換替代品，適用於 OPA640P — 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。
此產品無可直接替換的替代品。
申請替代品OPA640P 最大額定值與電氣特性
| Product Type | Voltage-feedback operational amplifier |
| Number of Circuits | 1 circuit |
| Unity-Gain Bandwidth | 1.3 GHz |
| Unity-Gain Stability | Unity-gain stable |
| Input Voltage Noise Density | 2.9 nV/√Hz |
| Common-Mode Rejection Ratio | 85 dB |
| Slew Rate | 350 V/µs |
| Low-Harmonic-Distortion Frequency | 10 MHz |
| 封裝 | 8-pin PDIP |
| Package Technology | Through-hole DIP |
| Package Width | 0.300 in (7.62 mm) |
| Number of Terminals | 8 terminals |
| Temperature Grade | Industrial |
| 安裝類型 | Through-hole |
OPA640P 0.300 in (7.62 mm) 腳位配置指南
OPA640P（0.300 in (7.62 mm) 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： OPA640P.
請參閱 資料表 以查看完整腳位配置。
典型應用
OPA640P 適用於 6 應用s: Wideband Instrumentation Signal Conditioning, Communications Receive-Signal Amplification, Video Gain and Buffer Stages, Active Filtering and Equalization, Precision Low-Level Buffering, Broadband Test and Measurement Front Ends.
Wideband Instrumentation Signal Conditioning
OPA640P fits wideband instrumentation because its verified 1.3 GHz unity-gain bandwidth and 350 V/µs slew rate preserve signal amplitude and timing across substantially higher frequencies than conventional precision amplifiers. The unity-gain-stable voltage-feedback architecture allows the same device family to serve as a gain or buffer stage when feedback conditions remain appropriate. Its 2.9 nV/√Hz input noise is also relevant when amplifying small sensor or laboratory signals. The design must still verify supply limits, common-mode range, output swing, and stability against the complete manufacturer datasheet before implementation.
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Communications Receive-Signal Amplification
OPA640P can amplify small received signals in communications equipment when the required frequency range approaches its verified 1.3 GHz unity-gain bandwidth. Its 350 V/µs slew rate provides additional margin for large or rapidly changing signal excursions, while 85 dB common-mode rejection helps reduce corruption from common-mode voltage. These characteristics make the device relevant to IF, baseband, and wideband interface blocks, although designers must confirm that the operating supply, common-mode input range, and output drive remain suitable for the selected gain and load.
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Video Gain and Buffer Stages
OPA640P is well matched to video gain and buffer stages because the verified data combines a 1.3 GHz unity-gain bandwidth, 350 V/µs slew rate, and low harmonic distortion at 10 MHz. The bandwidth supports high-frequency gain stages, and the slew rate allows the output to follow larger video transitions without the slew limitation found in slower amplifiers. Unity-gain stability is useful when the stage operates at or near a follower configuration. Cable loading, gain, output swing, and allowable distortion must still be checked against the actual video standard and complete OPA640P datasheet.
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Active Filtering and Equalization
OPA640P can serve in active filters and equalizer stages whose useful signal band approaches hundreds of megahertz. Its 1.3 GHz unity-gain bandwidth provides more closed-loop bandwidth potential than conventional audio op amps, while unity-gain stability supports low-noise-gain configurations when correctly compensated. The 2.9 nV/√Hz noise density contributes favorably to high-gain sections, and the 350 V/µs slew rate helps preserve large-signal behavior. Exact resistor and capacitor values require the manufacturer's stability guidance and must be checked for target gain, Q, load, and supply conditions.
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Precision Low-Level Buffering
OPA640P can buffer low-level sensor or laboratory signals where noise and input loading are important but wide bandwidth remains useful. Its 2.9 nV/√Hz input noise density is the principal benefit for high-gain measurement paths, while 85 dB common-mode rejection reduces interference caused by voltage shared by both inputs. The unity-gain-stable topology is particularly relevant to voltage-follower implementations. Before using the device in a precision DC measurement path, however, engineers should confirm input bias current, offset voltage, input bias-current cancellation, and output settling specifications, which are not present in the supplied excerpts.
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Broadband Test and Measurement Front Ends
OPA640P is relevant to broadband test and measurement front ends where attenuation, gain, or buffering must occur over a high frequency range. The verified 1.3 GHz unity-gain bandwidth and 350 V/µs slew rate offer the headroom needed for fast test signals, while the 2.9 nV/√Hz noise density supports low-amplitude measurements. Because instruments often impose strict requirements for output swing, offset, input bias current, settling, and long-term drift, those specifications must be taken from the full manufacturer document. The component should also be evaluated for the instrument's intended gain bandwidth, load, and calibration architecture.
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推薦產品摘要
工程參考資料，適用於 OPA640P — 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 |
| Product Type | Voltage-feedback operational amplifier |
| Number of Circuits | 1 circuit |
| Unity-Gain Bandwidth | 1.3 GHz |
| Unity-Gain Stability | Unity-gain stable |
| Input Voltage Noise Density | 2.9 nV/√Hz |
| Common-Mode Rejection Ratio | 85 dB |
| Slew Rate | 350 V/µs |
| Low-Harmonic-Distortion Frequency | 10 MHz |
| Mounting Technology | Through-hole PDIP |
| Verified Single-Unit Price | $7.45 as of 2026-10-28 |
主要差異化特點
- Combines very wide bandwidth with low input noise (對比General-purpose precision operational amplifiers)
- Provides high slew rate for fast signal transitions (對比Audio-frequency operational amplifiers)
- Maintains common-mode rejection in wideband systems (對比General-purpose single-supply amplifiers with restricted common-mode range)
- Supports direct unity-gain buffer operation (對比Current-feedback amplifiers)
設計說明
Do not treat a related OPA640-family part as a substitute merely because its bandwidth appears similar. Confirm the exact package, pin numbers, supply limits, input common-mode range, output swing, offset behavior, and stability requirements against the official OPA640P datasheet. The verified sources identify an 8-pin PDIP device but do not provide the complete numbered pin map, so the PCB footprint and schematic assignments must be checked directly before layout release or socket substitution.
Keep the feedback loop compact and use the manufacturer's recommended feedback topology for the intended closed-loop gain. With a 1.3 GHz unity-gain bandwidth and 350 V/µs slew rate, parasitic capacitance, long traces, and excessive loading can affect stability, peaking, and settling. Place input and feedback components close to the device, maintain a short ground-return path, and evaluate the completed board with appropriate bandwidth and time-domain measurements rather than relying on nominal gain calculations alone.
Confirm the allowable supply range and output swing from the complete datasheet before selecting bypass capacitors or defining the downstream power budget. The verified data does not state operating voltage, quiescent current, output-current capability, or output swing, so those values cannot be substituted from a generic op-amp family. Use adequately rated, low-ESR decoupling close to the supply pins and verify startup, shutdown, and load-transient behavior against the final regulator and output-load configuration.
Assess dissipation from the actual supply voltage, output voltage, quiescent current, load current, and package thermal resistance rather than from slew rate alone. The verified excerpt provides 350 V/µs slew rate but does not provide the supply-current or thermal-resistance values needed for a complete power calculation. Through-hole assembly may improve heat spreading compared with a small surface-mount package, but the actual board copper, airflow, and ambient conditions must be included in the thermal review.
合規資訊
The supplied verified excerpts identify OPA640P as an industrial-grade 8-PDIP device but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is treated as not applicable to the industrial-grade designation, not as evidence of automotive qualification.