OPA37GP - 63MHz Ultra-Low-Noise Precision Op Amp | Texas Instruments
部品番号: OPA37GP ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
OPA37GP 概要
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs while using negative feedback to set closed-loop gain. Precision operational amplifiers add low offset, low bias current, and stable voltage-noise performance. The OPA37 belongs to the broader hierarchy of operational amplifier, analog amplifier, signal-conditioning IC, and semiconductor.
The OPA37GP combines a 63 MHz gain-bandwidth product with a decompensated architecture, allowing operation at higher closed-loop gains than a unity-gain-stable device. Its 4.5 nV/√Hz noise and 100 µV offset make it suitable for precision audio, instrumentation, sensor-interface, and low-level signal-chain applications. The 11.9 V/µs slew rate supports faster signal transitions while preserving low distortion.
The device accepts dual supplies identified in the verified product data as approximately ±4 V to ±22 V, giving a broad operating range for laboratory, industrial, and communications equipment. The OPA37GP is specified for a -40 °C to 85 °C temperature range and is offered in the P package with 8 pins. The manufacturer describes the family as ultra-low-noise and precision, with laser-trimmed thin-film resistor technology cited in retrieved technical material.
Typical uses include low-level audio amplification, precision measurement front ends, current-voltage conversion, active filters, and instrumentation signal conditioning. The amplifier is particularly appropriate when low noise and accurate DC performance matter more than minimum power consumption or minimum cost.
When laying out an OPA37GP circuit, keep the feedback network and input connections short, preserve the required supply decoupling, and avoid placing long copper paths beside high-gain input nodes. Because this is a decompensated amplifier, verify the minimum stable closed-loop gain before substituting it into a unity-gain circuit. This page combines verified manufacturer and distributor information with practical selection guidance, application context, and replacement checks.
ドロップイン代替品: OPA37GP — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: OPA37GP （同一形状・フットプリント） — 相違点: Amplifier Type, Operating Temperature Range, Package, Gain-Bandwidth Product, Slew Rate.
クイック比較ツール — 並列比較する代替部品を選択:
OP37GP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OP37GPZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD797
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD8671
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA2277UA
✅ ドロップイン✓ 在庫あり
$2.95 / 個
データシートを見る →OPA37GP 最大定格＆電気的特性
| Amplifier Type | Single operational amplifier |
| トポロジー | Decompensated precision operational amplifier |
| Number of Circuits | 1 circuit |
| Gain-Bandwidth Product | 63 MHz |
| Slew Rate | 11.9 V/µs |
| Input Noise Density | 4.5 nV/√Hz |
| Offset Voltage | 100 µV |
| Supply Voltage Range | ±4 V to ±22 V |
| 動作温度範囲 | -40 °C to 85 °C |
| パッケージ | PDIP (P), 8 pins |
| Package Type | Through-hole PDIP |
| Manufacturer | Texas Instruments |
| Application Category | Precision signal processing |
OPA37GP through-hole pdip ピン配置ガイド
OPA37GP (through-hole pdip パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: OPA37GP.
詳細は データシート をご参照ください。
主な用途
OPA37GP の用途: 6 件s: Precision Audio Front End, Low-Level Instrumentation Amplification, Sensor Signal Conditioning, Active Precision Filters, Precision Current-to-Voltage Conversion, Laboratory and Test Equipment Signal Path.
Precision Audio Front End
The OPA37GP fits low-level audio preamplification because its 4.5 nV/√Hz input noise helps preserve small signals and its 11.9 V/µs slew rate supports fast waveform transitions. The device can amplify microphone, line, or instrumentation signals while maintaining low distortion in a dual-supply circuit. Because the OPA37 is decompensated, the feedback network must be selected for stable operation at the intended closed-loop gain, and supply decoupling should be placed close to the device.
おすすめ
Low-Level Instrumentation Amplification
OPA37GP is appropriate for precision measurement front ends that amplify small sensor or laboratory signals. Its 100 µV offset specification supports accurate DC measurement, while the 4.5 nV/√Hz noise specification reduces amplifier-generated noise relative to the sensed signal. The circuit should use short input traces, clean grounding, stable feedback resistors, and dual supplies that satisfy the verified approximately ±4 V to ±22 V range. Verify the required minimum closed-loop gain before implementation.
おすすめ
Sensor Signal Conditioning
OPA37GP can condition low-amplitude sensor outputs where source resistance and signal level make amplifier noise important. The 4.5 nV/√Hz input-noise figure is useful for reducing noise added to a weak sensor signal, while the 63 MHz gain-bandwidth product provides bandwidth for signal shaping and filtering. Use short, guarded input routing and avoid high-impedance nodes near switching circuitry. Confirm the actual minimum stable gain and output swing in the manufacturer datasheet.
おすすめ
Active Precision Filters
OPA37GP can be used in active filter designs requiring controlled gain, low noise, and adequate bandwidth. Its 63 MHz gain-bandwidth product and 11.9 V/µs slew rate allow it to process signals through several audio or measurement filter sections, provided the closed-loop gain remains within the decompensated device's stable operating region. Resistor matching and capacitor selection should be reviewed for the target frequency and tolerance. Prototype the filter and check phase margin and distortion rather than assuming generic op-amp behavior.
おすすめ
Precision Current-to-Voltage Conversion
OPA37GP is useful in transimpedance and current-measurement circuits when low input noise and low offset are more important than minimum power. The 100 µV offset helps reduce output error, and the 4.5 nV/√Hz noise specification supports small-signal current detection. The feedback resistor and compensation network must be calculated for the source capacitance and target bandwidth, while the decompensated amplifier must be operated above its stable-gain requirement. PCB input capacitance and leakage should be minimized.
おすすめ
Laboratory and Test Equipment Signal Path
OPA37GP can serve as a low-noise amplifier stage in laboratory instruments, test fixtures, and precision measurement equipment. The combination of low noise, 100 µV offset, 63 MHz bandwidth, and 11.9 V/µs slew rate allows it to handle both low-frequency accuracy and faster signal details. Use a clean reference ground, isolated high-gain wiring, and supply bypass capacitors selected according to the manufacturer recommendations. Confirm output swing, input common-mode range, and stability with the actual circuit load.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: OPA37GP — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | OP37GP | OP37GPZ | AD797 | AD8671 | OPA227 |
|---|---|---|---|---|---|---|
| Package | 8-pin PDIP (P) | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-8 |
| Brand | Texas Instruments | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
主な差別化要因
- Decompensated precision architecture （vs OPA227)
- Verified high-speed precision performance （vs AD8671)
- Low-noise input specification （vs OP37GPZ)
設計ノート
The OPA37 is decompensated, so the closed-loop gain must be selected for stable operation rather than assuming unity-gain stability. Before layout, identify the minimum stable gain from the manufacturer datasheet and confirm that the intended feedback network satisfies it. A substitution that is unity-gain stable may behave differently from the OPA37 even if its headline bandwidth appears similar.
Use short, direct traces for the input and feedback paths. Place compensation and feedback components close to the relevant amplifier pins, and keep high-impedance input nodes away from switching nodes and digital return currents. Because the part is an 8-pin PDIP, provide adequate lead spacing and route the ground return to reduce parasitic inductance and avoid introducing instability.
Decouple each supply rail near the OPA37GP with the capacitance and ESR recommendations from the manufacturer datasheet. The verified range of approximately ±4 V to ±22 V should be treated as the supply design envelope, not as permission to exceed absolute maximum ratings. Check startup sequencing, rail symmetry, and output swing before connecting the amplifier to an external signal chain.
For low-level inputs, minimize source resistance and avoid long unshielded traces. The 4.5 nV/√Hz noise specification makes input layout important because leakage, leakage through contaminated boards, and high-impedance guarding can dominate the system error. Keep the input network localized and verify the complete signal path with an oscilloscope and suitable low-noise measurement techniques.
コンプライアンス情報
The supplied verified data identifies the product and package but does not provide specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements. These fields remain unknown rather than inferred.
