INA110KP - Fast-Settling FET-Input Instrumentation Amplifier | TI
部品番号: INA110KP ✓ 生産中INA110KP 概要
An instrumentation amplifier is a differential amplifier optimized for low-level measurements. Its three-amplifier or feedback architecture provides high input impedance, accurate differential gain, and rejection of common-mode voltage. INA110KP is designed for applications where sensor outputs are small, impedance may be high, and measurement speed must exceed that of many precision instrumentation amplifiers.
Internal gain-setting resistors simplify implementation by supporting gains of 1, 10, 100, 200, and 500 V/V. Maximum input bias current is 50 pA, helping preserve accuracy with high-impedance sources. The amplifier also provides a minimum common-mode rejection of 106 dB at 10 kHz, low gain drift of 50 ppm/°C, and low offset drift of 2 µV/°C.
The current-feedback circuit topology supports a 2.5 MHz bandwidth and 17 V/µs slew rate. According to the manufacturer product page, the INA110 settles to within 0.01% in 4 µs, making it suitable for high-speed and multiplexed-input data-acquisition systems where accurate settling is required after each channel selection.
Typical uses include bridge and strain-gauge signal conditioning, high-impedance sensor interfaces, multiplexed measurement systems, laboratory instrumentation, industrial monitoring, and precision current or voltage measurements. The low input bias current is especially useful when source resistance is high enough for input leakage to affect measurement accuracy.
Designers should follow the manufacturer pin-description and typical-application circuits when assigning inputs, gain connections, supply bypass capacitors, and output connections. Input filtering and protection must account for the very low 50 pA maximum input bias current. Decoupling and grounding should be arranged to minimize parasitic feedback around the high-bandwidth amplifier.
This product page combines the manufacturer's core performance data with application guidance, practical design notes, and a package-matched comparison framework. It is intended to help engineers evaluate settling behavior, gain selection, source impedance, common-mode range, and layout before integrating INA110KP into a measurement system.
ドロップイン代替品: INA110KP — 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。
INA110AP
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
INA110KP 最大定格＆電気的特性
| Amplifier Type | Instrumentation amplifier |
| Number of Circuits | 1 circuit |
| Input Type | FET input |
| トポロジー | Current feedback |
| Internal Gains | 1, 10, 100, 200, and 500 V/V |
| Bandwidth | 2.5 MHz |
| Slew Rate | 17 V/µs |
| Settling Time | 4 µs to 0.01% |
| Maximum Input Bias Current | 50 pA |
| Common-Mode Rejection Ratio | 106 dB minimum at 10 kHz |
| Gain Drift | 50 ppm/°C maximum |
| Offset Drift | 2 µV/°C maximum |
| Supply Voltage Range | 12 V to 36 V |
| Offset Voltage | 500 µV maximum |
| パッケージ | 16-pin plastic DIP (PDIP) |
| ピン数 | 16 pins |
| 実装タイプ | Through-hole |
| Input Filter Capability | Supported by high input impedance and low input bias current |
INA110KP 16-pin plastic dip (pdip) ピン配置ガイド
INA110KP (16-pin plastic dip (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: INA110KP.
詳細は データシート をご参照ください。
主な用途
INA110KP の用途: 6 件s: Multiplexed Data Acquisition, High-Impedance Sensor Interfacing, Bridge and Strain-Gauge Measurement, Laboratory Instrumentation, Industrial Process Monitoring, Precision Voltage and Current Measurement.
Multiplexed Data Acquisition
The INA110KP is well suited to multiplexed data-acquisition systems because it settles to within 0.01% in 4 µs while offering internal gains of 1, 10, 100, 200, and 500 V/V. These characteristics allow a channel to be selected, measured, and converted before the next acquisition interval begins. Its 2.5 MHz bandwidth and 17 V/µs slew rate support fast signal changes without requiring a slower precision-only architecture. Engineers should include adequate settling margin, input isolation, and channel-switching transients in the system timing budget.
おすすめ
High-Impedance Sensor Interfacing
The INA110KP fits high-impedance sensor interfaces because its maximum input bias current is only 50 pA. This limits the bias-current-induced error that can become significant when the sensor source resistance is high. The device also supports internal gains up to 500 V/V, permitting small sensor outputs to be amplified without an external resistor network. Layout should include guarding, minimized leakage paths, and protection components whose leakage remains small relative to the measured source current.
おすすめ
Bridge and Strain-Gauge Measurement
A strain-gauge or resistive bridge produces a small differential signal, making the INA110KP's high input impedance and selectable gain useful for conditioning. Gains of 10, 100, 200, or 500 V/V can amplify the bridge imbalance while the 106 dB minimum common-mode rejection at 10 kHz helps reject common-mode excitation-related errors. The circuit should use excitation wiring that minimizes thermoelectric voltages, matched input filtering, and a ground arrangement that avoids injecting excitation current into the measurement return path.
おすすめ
Laboratory Instrumentation
The INA110KP can serve as the input stage of laboratory instrumentation measuring low-level differential voltages across a broad gain range. Its 4 µs settling time to 0.01% supports responsive measurements, while the 17 V/µs slew rate reduces distortion for rapidly varying inputs. The 500 pA-class input bias performance indicated by the 50 pA maximum specification helps maintain measurement integrity at high source impedance. Calibration should account for gain error, offset drift, and the actual bandwidth at each selected gain.
おすすめ
Industrial Process Monitoring
The INA110KP is suitable for process-monitoring front ends that must combine differential measurement with selectable gain and rapid settling. Its 2.5 MHz bandwidth gives design margin for faster sensor dynamics, while the internal 1, 10, 100, 200, and 500 V/V ratios simplify range selection. Industrial implementations should consider surge protection, input clamping, isolation strategy, and the relationship between the 12 V to 36 V supply range and the sensor excitation voltage. Calibration and drift compensation remain necessary for long-duration measurements.
おすすめ
Precision Voltage and Current Measurement
The INA110KP can amplify small voltage differences generated by current shunts, isolated sensing elements, or precision dividers. Its low input bias current reduces the loading of high-resistance sensing networks, and its available gain ratios support both moderate and substantial signal amplification. The design must verify input common-mode voltage, output swing, supply headroom, and bandwidth at the selected gain. Filtering near the amplifier should preserve the intended settling performance without introducing unnecessary instability around the current-feedback stage.
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: INA110KP — 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 | INA110AP |
|---|---|---|
| Package | 16-pin plastic DIP (PDIP) | 16-pin plastic DIP (PDIP) |
| Brand | Texas Instruments | Texas Instruments |
主な差別化要因
- Fast 0.01% settling supports higher-speed acquisition （vs INA110AP)
- Five factory-set gain ratios simplify range selection （vs INA110AP)
- Very low input bias current protects high-impedance measurements （vs INA110AP)
設計ノート
Place input and output decoupling capacitors close to their associated pins, and keep the high-speed feedback loop compact. Because the INA110KP uses a current-feedback topology and reaches 2.5 MHz bandwidth, long PCB traces can add phase delay and encourage peaking. Use a continuous ground reference, avoid routing sensitive input nets beneath digital or switching-converter nodes, and terminate unused inputs according to the manufacturer's recommended circuit.
Do not assume that every INA110 family member is a drop-in replacement solely because it has 16 pins. INA110KP uses a 16-pin plastic DIP, while INA110SG uses a surface-mount package. For a replacement, verify pin numbering, gain-selection connections, input and output common-mode limits, supply range, and temperature grade. The INA110AP candidate in the comparison retains the plastic DIP format but represents a different temperature grade.
Design the input path for very low bias current by keeping PCB surfaces clean and avoiding moisture contamination near the input pins. Maximum input bias current is 50 pA, so contamination, protection-device leakage, or long high-impedance traces can materially affect accuracy. Use guarding where practical, maintain symmetric input routing, and place any input filters close enough to the amplifier that leakage from their dielectric materials remains small relative to the source current.
The documented supply range is 12 V to 36 V. Verify that the selected supply voltage supports the required input common-mode range and output swing at the chosen gain. Place supply-bypass components close to the device, provide adequate return-current paths, and evaluate power-supply noise at the 2.5 MHz bandwidth. Decoupling requirements should follow the manufacturer's typical application circuit and be adjusted for the actual board construction.
コンプライアンス情報
The manufacturer product page identifies industrial, military, and commercial temperature-grade options, but no specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration for INA110KP was included in the cited product information. AEC-Q100 status is marked not applicable because the part is not identified as an automotive-qualified device.
