LT1001CH - 110dB Precision Operational Amplifier | Analog Devices
部品番号: LT1001CH ✓ 生産中LT1001CH 概要
An operational amplifier is a high-gain differential-input amplifier that uses negative feedback to create stable, accurate gain in closed-loop circuits. Within the electronic-component hierarchy, the LT1001 belongs to the precision operational-amplifier family, which combines amplifiers with instrumentation amplifiers, analog signal-chain ICs, and semiconductor devices. Its principal role is to amplify small sensor or measurement signals while minimizing errors introduced by input bias current, offset voltage, and finite gain.
The verified manufacturer information highlights three defining characteristics: 700 pA input bias current, 110 dB open-loop gain, and a -3 V to +18 V supply range. The 700 pA bias specification is especially relevant to high-impedance transducers because bias current creates an error voltage across source impedance. The 110 dB gain specification provides substantial open-loop margin for precision feedback networks. Dual-supply operation also allows bipolar input and output signals without requiring separate rail-to-rail biasing arrangements.
The LT1001 data sheet describes the device as a precision operational amplifier whose distribution of key parameters was optimized during design, processing, and testing. That emphasis distinguishes it from general-purpose amplifiers in applications where predictable offset, bias current, gain behavior, and low-level signal fidelity matter. The TO-5 metal can offers an eight-pin mechanical format commonly encountered in precision laboratory and instrumentation equipment.
Typical uses include low-level sensor front ends, bridge and strain-gauge signal conditioning, precision current-to-voltage conversion, laboratory instrumentation, and low-frequency measurement circuits. Its low 700 pA bias current can reduce loading of high-output-impedance sensors, while its 110 dB open-loop gain can improve closed-loop accuracy when the circuit operates with suitable feedback components and operating conditions.
Designers should verify the exact eight-pin TO-5 pinout, offset-trim configuration, common-mode range, output-swing limits, and stability requirements against the manufacturer data sheet before replacing an existing amplifier. Input and feedback resistances must also be selected so their thermal noise and parasitic capacitance do not undermine the intended precision. Decoupling and grounding remain important even for a low-noise precision device because supply and return-path impedance can affect measured output performance.
This page combines verified manufacturer and distributor information, package details, selection guidance, and a structured comparison of same-family drop-in options. It distinguishes known characteristics from parameters that still require confirmation from the official LT1001 data sheet, helping engineers evaluate replacement risk without relying on incomplete distributor summaries.
ドロップイン代替品: LT1001CH — 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。
LT1001AH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1001BH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1001AC8
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1001BC8
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1001CC8
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1001CH 最大定格＆電気的特性
| Product Type | Precision operational amplifier |
| Number of Circuits | 1 circuit |
| Input Bias Current | 700 pA |
| Open-Loop Gain | 110 dB |
| Supply Voltage Range | -3 V to +18 V |
| パッケージ | 8-pin TO-5 metal can |
| ピン数 | 8 pins |
LT1001CH 8-pin to-5 metal can ピン配置ガイド
LT1001CH (8-pin to-5 metal can 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: LT1001CH.
詳細は データシート をご参照ください。
主な用途
LT1001CH の用途: 6 件s: High-Impedance Sensor Front End, Precision Strain-Gauge Bridge Signal Conditioning, Laboratory Instrumentation Signal Chain, Precision Current-to-Voltage Conversion, Low-Level Voltage Buffer, Precision Data Acquisition Front End.
High-Impedance Sensor Front End
The LT1001CH is well suited to high-source-impedance sensor interfaces because its verified input bias current is only 700 pA. In an inverting or non-inverting amplifier, input bias current produces an error proportional to source impedance, so the low-current specification helps preserve the accuracy of small transducer signals. Its verified 110 dB open-loop gain can also support stable closed-loop precision when appropriate feedback resistors are used. The implementation should include guarding, short routed input traces, clean grounding, and verified common-mode limits.
おすすめ
Precision Strain-Gauge Bridge Signal Conditioning
The LT1001CH can serve in precision bridge and strain-gauge signal-conditioning circuits where millivolt-level differential signals require accurate amplification. Its 700 pA input bias current limits the unwanted offset caused by high bridge and lead resistance, while the verified 110 dB open-loop gain provides gain margin for a carefully selected feedback network. Practical layouts should keep sensitive inputs away from switching nodes and power wiring. Input common-mode voltage, output swing, resistor matching, and excitation drift must be checked against the manufacturer data sheet.
おすすめ
Laboratory Instrumentation Signal Chain
The LT1001CH is appropriate for laboratory instrumentation that amplifies low-level signals while requiring predictable DC behavior. The LT1001 family is identified by Analog Devices as a production precision operational amplifier, and the target combines 700 pA bias current with 110 dB open-loop gain. These characteristics make it useful in buffer, difference, and gain stages feeding measurement converters. Designers should use low-noise, tightly matched feedback resistors and confirm the amplifier's noise, offset drift, settling behavior, and common-mode limits before finalizing the instrument specification.
おすすめ
Precision Current-to-Voltage Conversion
The LT1001CH can be used in transimpedance and precision current-to-voltage circuits where the feedback resistor defines the conversion gain. Its 700 pA input bias current produces only a small error relative to currents measured through very large feedback resistors, while the verified 110 dB open-loop gain supports accurate operation in the feedback-defined stage. Parasitic capacitance at the summing node can create stability problems, so resistor and capacitor selection must account for the photodiode or sensor capacitance. The exact frequency-response limits remain subject to the complete manufacturer data sheet.
おすすめ
Low-Level Voltage Buffer
The LT1001CH can buffer low-level voltage signals when the source impedance is high enough that input bias-current error would otherwise dominate. A voltage follower using the device retains its verified 700 pA bias current and benefits from the family's 110 dB open-loop gain, although closed-loop bandwidth, load capability, and output swing determine the useful operating range. Keep the feedback connection short and place input-referenced compensation only as directed by the manufacturer data sheet. This application is especially relevant to potentiometers, reference nodes, and laboratory probes.
おすすめ
Precision Data Acquisition Front End
The LT1001CH can serve as the analog gain stage ahead of a precision data-acquisition converter in equipment handling small sensor outputs. The 700 pA input bias current reduces loading errors from high-impedance sensors, and the 110 dB open-loop gain supports a high-gain stage with minimal dependence on forward gain. The signal path should be laid out to minimize thermal gradients and coupling from switching regulators. Before selecting the amplifier, verify input range, output swing, slew rate, settling time, noise, and the required converter interface.
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: LT1001CH — 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 | LT1001AH | LT1001BH | LT1001AC8 | LT1001BC8 | LT1001CC8 |
|---|---|---|---|---|---|---|
| Product Type | Precision operational amplifier | Precision operational amplifier | Precision operational amplifier | Precision operational amplifier | Precision operational amplifier | Precision operational amplifier |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TO-5-8 Metal Can | TO-5-8 Metal Can - same package | TO-5-8 Metal Can - same package | TO-5-8 Metal Can - same package | TO-5-8 Metal Can - same package | TO-5-8 Metal Can - same package |
| Number of Circuits | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit |
| Input Bias Current | 700 pA | 700 pA | 700 pA | 700 pA | 700 pA | 700 pA |
| Open-Loop Gain | 110 dB | 110 dB | 110 dB | 110 dB | 110 dB | 110 dB |
| Supply Voltage Range | -3 V to +18 V | -3 V to +18 V | -3 V to +18 V | -3 V to +18 V | -3 V to +18 V | -3 V to +18 V |
| Pin Count | 8 pins | 8 pins | 8 pins | 8 pins | 8 pins | 8 pins |
| Ordering Grade | CH commercial-grade ordering code | AH ordering code | BH ordering code | AC8 ordering code | BC8 ordering code | CC8 ordering code |
主な差別化要因
- Low verified input bias current （vs LT1001AH)
- High verified open-loop gain （vs LT1001BH)
- Matching precision-amplifier core （vs LT1001AC8)
- Drop-in TO-5-8 mechanical format （vs LT1001BC8)
- Production LT1001 family availability （vs LT1001CC8)
設計ノート
Do not treat every LT1001 suffix as electrically identical. LT1001CH and the listed AH, BH, AC8, BC8, and CC8 variants use the same core precision-amplifier family and TO-5-8 format, but ordering suffixes can indicate different grade or package details. Before replacement, compare the complete manufacturer ordering table, temperature range, offset-trim pin arrangement, common-mode range, and supply limits. The supplied excerpts confirm the target package and core ratings but do not provide every grade-level limit.
Protect the high-impedance input stage from leakage and capacitive pickup. Keep input traces short, isolate them from power and switching-node traces, use a suitable guard structure where appropriate, and ensure the PCB surface beneath the input is free of contamination. With a verified input bias current of 700 pA, even modest board leakage or contamination can become significant when source resistance is high. Confirm the final pin table and offset-adjustment configuration from the official eight-pin TO-5 drawing.
Select feedback resistors to balance noise, offset error, bandwidth, and stability rather than using the highest available resistance. A large feedback value can amplify thermal noise and input-capacitance effects, while a small value increases loading on the source and consumes additional output-current capability. Place the feedback network close to the amplifier, use clean supply bypassing, and verify the complete closed-loop response with the actual source impedance. The verified 110 dB open-loop gain supports precision feedback design but does not remove stability requirements.
コンプライアンス情報
The supplied verified excerpts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These values require confirmation from current Analog Devices product documentation or a supplier declaration.
