LT1056CH - 16 V/us Precision JFET Op Amp | Analog Devices
部品番号: LT1056CH ✓ 生産中LT1056CH 概要
A JFET-input operational amplifier is a voltage-amplifier integrated circuit whose field-effect input stage provides very low bias current. This LT1056CH family member is designed for applications requiring accurate DC offset behavior, low input bias current, wide bandwidth, and rapid large-signal response. Its position in the hierarchy is precision operational amplifier > general-purpose operational amplifier > analog signal-conditioning IC > semiconductor.
Key features include a 16 V/us slew rate and 6.5 MHz gain-bandwidth product, allowing the amplifier to process signals with significant amplitude and bandwidth simultaneously. The typical input offset voltage is 50 uV, while the guaranteed maximum is 150 uV. Typical offset drift is 1.2 uV/degree C. Input bias current is typically 40 pA at 70 degrees C and 500 pA at 125 degrees C, making the device appropriate for high-impedance sensing stages.
The LT1056 and LT1055 share the same JFET-input architecture, but designers should confirm offset, drift, bias-current, and package details for each ordering code. The verified manufacturer description specifically states that the LT1055/LT1056 combination combines precision specifications with 16 V/us slew rate and 6.5 MHz gain-bandwidth product. This performance is useful when slew-rate limiting, rather than small-signal bandwidth, would dominate amplifier behavior.
Typical uses include precision instrumentation, low-level signal conditioning, active filters, data-acquisition front ends, and buffered sensor interfaces. The JFET input stage is especially useful where source impedance is high and the signal source cannot supply substantial bias current. The amplifier should be configured with suitable feedback, power-supply decoupling, and output-stage load consideration to retain low distortion and stable operation.
Designers should account for input and output voltage headroom, verify the exact pin configuration and lead arrangement for the 8-pin TO-5 package, and inspect the manufacturer datasheet before layout release. The CH ordering code is associated with the commercial temperature grade and wire-lead TO-5 format. Do not assume that a modern surface-mount successor has the same footprint or pinout without an explicit manufacturer or distributor cross-reference.
This page consolidates the verified manufacturer specifications, distributor identification, package details, pricing availability, and qualified drop-in information for the LT1056CH. It also distinguishes measured or guaranteed electrical characteristics from data that remains unavailable in the supplied sources, helping engineers make sourcing and design decisions without relying on unverified substitutions.
ドロップイン代替品: LT1056CH — 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。
LT1056CP
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1056CH 最大定格＆電気的特性
| Amplifier Type | Precision JFET-input operational amplifier |
| Number of Circuits | 1 circuit |
| Gain-Bandwidth Product | 6.5 MHz |
| Slew Rate | 16 V/us |
| Typical Input Offset Voltage | 50 uV |
| Maximum Input Offset Voltage | 150 uV |
| Typical Input Offset Drift | 1.2 uV/degree C |
| Guaranteed Input Offset Drift | 4 uV/degree C maximum |
| Typical Input Bias Current at 70 degrees C | 40 pA |
| Typical Input Bias Current at 125 degrees C | 500 pA |
| Guaranteed Input Bias Current at 70 degrees C | 150 pA maximum |
| Guaranteed Input Bias Current at 125 degrees C | 2.5 nA maximum |
| Maximum Offset Voltage at 125 degrees C | 500 uV |
| パッケージ | 8-pin TO-5, round, wire-lead |
| Temperature Grade | Commercial |
| 実装タイプ | Through-hole |
LT1056CH 8-pin to-5, round, wire-lead ピン配置ガイド
LT1056CH (8-pin to-5, round, wire-lead 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: LT1056CH.
詳細は データシート をご参照ください。
主な用途
LT1056CH の用途: 6 件s: Precision Instrumentation Signal Conditioning, High-Impedance Sensor Amplification, Active Filtering and Signal Shaping, Data-Acquisition Front End, Low-Distortion Buffer Stage, Laboratory and Test Signal Conditioning.
Precision Instrumentation Signal Conditioning
The LT1056CH fits precision instrumentation front ends that amplify small differential signals while requiring low offset and rapid output response. Its 50 uV typical input offset, 150 uV guaranteed maximum, and 1.2 uV/degree C typical drift help preserve measurement accuracy as temperature changes. The 16 V/us slew rate also reduces distortion when the conditioned signal contains moderate-amplitude, high-frequency components. Place the amplifier in the conventional closed-loop configuration, use short feedback traces, and confirm the signal amplitude, bandwidth, and common-mode range against the complete manufacturer data before production.
High-Impedance Sensor Amplification
The LT1056CH is suitable for high-impedance sensor interfaces because its JFET input stage provides typical bias current of 40 pA at 70 degrees C and 500 pA at 125 degrees C. This minimizes bias-current-induced sensing error when the source impedance is high. The 150 uV maximum offset specification also supports a tighter DC error budget than many general-purpose amplifiers. Designers should still evaluate source resistance, input capacitance, thermal noise, guard-ring layout, and signal settling time, because those details determine whether the amplifier’s low input current can deliver the expected system accuracy.
Active Filtering and Signal Shaping
For active filters and precision signal-shaping blocks, the LT1056CH combines a 6.5 MHz gain-bandwidth product with a 16 V/us slew rate. This combination supports useful closed-loop bandwidth while reducing large-signal slew limiting. The JFET input stage preserves signal integrity at high source impedance, and the typically 50 uV offset can limit DC leakage into filter stages with narrow low-frequency bandwidth. Component tolerances, resistor noise, capacitor selection, and stability margins remain central to filter accuracy. The supplied sources do not state the complete noise density or minimum stable-gain data, so the final filter should be simulated and checked against the manufacturer stability information.
Data-Acquisition Front End
The LT1056CH can serve as the analog gain stage ahead of an ADC in a data-acquisition system where low offset, low input current, and fast settling are valuable. Its 150 uV maximum offset reduces static gain error, while 16 V/us slew rate and 6.5 MHz gain-bandwidth product allow the amplifier to handle signals beyond the pure-DC regime. Input filtering, ADC source-impedance requirements, common-mode limits, and settling time must be evaluated together. In multiplexed systems, charge injection from switches and the amplifier’s ability to recover after overload can be as important as nominal bandwidth, so verify those characteristics from the full datasheet.
Low-Distortion Buffer Stage
The LT1056CH is useful as a buffer or gain stage where conventional precision amplifiers would slew-limit and distort a rapidly changing output. Its 16 V/us slew rate allows the output to follow large changes more rapidly than a typical low-power precision device, while the 6.5 MHz gain-bandwidth product supports higher-frequency closed-loop operation. The trade-off is that a precision JFET amplifier in a legacy TO-5 package may consume more board area and require careful grounding than a modern surface-mount amplifier. Confirm output-current capability, output swing, load stability, and thermal behavior from the full datasheet before using it as a general output buffer.
Laboratory and Test Signal Conditioning
For laboratory measurement chains, the LT1056CH can condition low-level signals with a combination of precision offset behavior and useful high-speed response. The 50 uV typical offset, 1.2 uV/degree C typical drift, and picoamp-class bias current support accurate handling of high-resolution sources and high-impedance probes. Its 16 V/us slew rate prevents the output from becoming the limiting stage when waveforms have moderate amplitude and high slew demand. Instrument designers should account for the legacy through-hole footprint, provide stable references, avoid excessive capacitive loading, and verify long-term drift and temperature behavior against their calibration requirements.
エンジニアリング参考データ: LT1056CH — 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 | LT1056CP |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 8-pin TO-5 | 8-pin TO-5 |
| Amplifier Architecture | Precision JFET-input operational amplifier | LT1056 family JFET-input operational amplifier |
| Number of Circuits | 1 circuit | 1 circuit |
主な差別化要因
- Combines picoamp-class input bias with high-speed response （vs General-purpose precision operational amplifiers)
- Precision offset specification supports tighter error budgets （vs LT1056CP)
- High-temperature bias-current growth remains characterized （vs General-purpose bipolar-input operational amplifiers)
設計ノート
Keep feedback components and their associated signal paths compact because the LT1056CH combines a 6.5 MHz gain-bandwidth product with a 16 V/us slew rate. Route the non-inverting input and feedback return path away from power-supply and output traces. The through-hole TO-5 package requires deliberate ground-return placement; use a nearby ground plane or bypass connection rather than relying on a long ground lead through the socket.
Do not substitute a similarly performing op amp solely by matching bandwidth or slew rate. A true LT1056CH replacement must preserve the 8-pin TO-5 footprint, lead numbering, pin functions, supply compatibility, offset behavior, and bias-current requirements. The supplied cross-reference results do not expose enough candidate-specific data to establish five drop-in parts, so verify any proposed replacement against the manufacturer datasheet and the actual PCB land pattern.
Account for the TO-5 package’s lead inductance and socket capacitance when operating near the upper end of the amplifier’s 6.5 MHz gain-bandwidth product. A short, low-inductance ground connection and local supply bypassing reduce feedback from common impedance. For high-impedance sources, guard the input node and keep board contamination and flux residue away from the input terminal, because leakage can overwhelm the LT1056CH’s very low input bias current.
The supplied excerpts do not state the LT1056CH supply-voltage range, quiescent current, output-current capability, or input/output common-mode limits. Confirm those values from the manufacturer datasheet and ensure that both supply rails and signal levels remain within the guaranteed operating region. Decouple the supply pins locally and avoid relying on the 6.5 MHz bandwidth figure as a guarantee of stable operation at every gain setting.
コンプライアンス情報
The supplied verified sources identify the commercial temperature grade and package but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than inferred.
