LT1022MH - 26V/us Precision JFET Op Amp | Analog Devices
部品番号: LT1022MH ✓ 生産中LT1022MH 概要
A JFET-input operational amplifier is a voltage-feedback amplifier whose input stage uses junction field-effect transistors. The JFET input provides very low input bias current while retaining the low-noise characteristics expected in instrumentation, buffering, and feedback-control circuits. In the product hierarchy, the LT1022MH is a precision operational amplifier, a low-noise amplifier IC, and a semiconductor used to amplify small voltage signals without introducing substantial input loading.
The verified specifications highlight a guaranteed slew rate of at least 23 V/us, a maximum input offset voltage of 250 uV, and a maximum offset drift of 5 uV/C. Input bias current is guaranteed at 180 pA at 70 C and 4 nA at 125 C. These characteristics suit high-impedance transducers and precision feedback networks, where low current draw, small offset, and thermal stability are more important than the low cost or low power of a general-purpose amplifier.
The 8.5 MHz gain-bandwidth product allows useful closed-loop bandwidth at moderate gains, while the 26 V/us typical slew rate improves large-signal response. The Analog Devices product information states that the output can deliver 20 mA without gain degradation. Together, these ratings make the amplifier useful in precision signal chains where both small-signal accuracy and dynamic range matter.
Typical uses include low-level sensor amplification, laboratory instrumentation, photodiode and detector interfaces, active filters, and precision feedback loops. The very low 50 pA typical input bias current at 70 C is especially valuable for high-source-impedance sensors. The military-grade suffix and hermetic-style TO-5 construction are relevant to equipment specified for severe temperature or environmental requirements.
The principal design consideration is supply compatibility: the verified excerpts do not state the operating supply-voltage range, so system-level rail selection must be confirmed in the manufacturer datasheet. Decoupling, input common-mode range, output swing, and noise performance must also be checked against the actual circuit rather than inferred solely from speed and offset ratings.
This product record combines manufacturer specifications, distributor package information, application guidance, and a strict comparison of same-family drop-in candidates. It is designed to help engineers identify the LT1022MH quickly while preserving the distinction between verified electrical data and parameters that still require confirmation.
ドロップイン代替品: LT1022MH — 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。
LT1022AH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1022CH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1022BH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1022ACH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1022BH
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1022MH 最大定格＆電気的特性
| Amplifier Type | High-speed precision JFET-input operational amplifier |
| Number of Circuits | 1 circuit |
| Slew Rate | 26 V/us typical; 23 V/us minimum guaranteed |
| Gain-Bandwidth Product | 8.5 MHz |
| Input Offset Voltage | 80 uV typical; 250 uV maximum |
| Input Offset Voltage at 125 C | 750 uV maximum |
| Input Offset Drift | 1.5 uV/C typical; 5 uV/C maximum guaranteed |
| Input Bias Current at 70 C | 50 pA typical; 180 pA maximum guaranteed |
| Input Bias Current at 125 C | 500 pA typical; 4 nA maximum guaranteed |
| Output Load Current | 20 mA without gain degradation |
| Minimum Voltage Gain | 35,000 V/V |
| Temperature Grade | Military |
| パッケージ | 8-terminal round TO-5 metal package |
| Terminal Form | Wire |
LT1022MH 8-terminal round to-5 metal package ピン配置ガイド
LT1022MH (8-terminal round to-5 metal package 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: LT1022MH.
詳細は データシート をご参照ください。
主な用途
LT1022MH の用途: 6 件s: Precision Instrumentation Amplification, Photodiode and Detector Interface, Active Precision Filters, Laboratory and Test Signal Conditioning, High-Impedance Sensor Signal Paths, Military-Temperature Feedback Control.
Precision Instrumentation Amplification
The LT1022MH fits precision instrumentation because its 250 uV maximum input offset voltage, 5 uV/C maximum drift, and 180 pA maximum bias current at 70 C reduce errors in low-level measurement paths. With an 8.5 MHz gain-bandwidth product and 26 V/us typical slew rate, it can amplify sensor-derived signals while retaining useful bandwidth and transient response. Place the device in a conventional voltage-feedback topology, observe the manufacturer input common-mode limits, and keep the selected gain consistent with the required closed-loop bandwidth. Compared with a general-purpose CMOS amplifier, the JFET input offers substantially lower input current, which is advantageous when the source resistance is high enough for amplifier loading to affect measurement accuracy.
Photodiode and Detector Interface
The LT1022MH is suitable for low-current photodiode and detector interfaces because the verified input bias current is 50 pA typical at 70 C and no more than 180 pA at that temperature. Its 250 uV maximum offset voltage also helps control signal-chain error when operating with small detector outputs. Use the amplifier with the source resistance and feedback values recommended for the intended transimpedance gain, while checking the maximum input bias current at the highest expected temperature. The 26 V/us typical slew rate provides useful response speed for moderate detector bandwidth, although the final transimpedance bandwidth must be derived from the complete noise-gain and capacitance network rather than from the 8.5 MHz gain-bandwidth product alone.
Active Precision Filters
The LT1022MH can serve as an active element in precision filters that require both low input loading and predictable large-signal behavior. Its 8.5 MHz gain-bandwidth product supports moderate closed-loop gains, while the 26 V/us typical slew rate helps preserve output integrity when filter inputs change quickly. The 180 pA maximum bias current at 70 C reduces excitation errors in high-impedance filter networks, and the 250 uV maximum offset helps reduce DC output error. Component tolerances and the amplifier's finite gain-bandwidth product still shape the filter response. Prototype the final gain and compensation arrangement, verify output swing against the expected signal amplitude, and confirm that the selected supply voltage satisfies both operating and common-mode requirements.
Laboratory and Test Signal Conditioning
The LT1022MH is appropriate for laboratory and test-signal conditioning where low input bias current, modest offset, and speed must coexist in a single amplifier. The device provides an 8.5 MHz gain-bandwidth product and 26 V/us typical slew rate, allowing it to condition signals in general-purpose instruments without adopting a slower precision-only amplifier. Its maximum offset voltage of 250 uV and maximum drift of 5 uV/C help establish predictable DC behavior, while the 20 mA output-load capability provides useful drive for moderate external loads. Buffer sensitive sources close to the instrument input to minimize cable noise and capacitance effects, and verify the output swing, supply range, and noise behavior in the complete measurement path.
High-Impedance Sensor Signal Paths
The LT1022MH supports high-impedance sensor signal paths because its input bias current remains low even at elevated temperature, reaching a guaranteed maximum of 4 nA at 125 C. For resistive sensors, that current creates an input error proportional to source resistance; reducing the amplifier contribution helps preserve the measured signal. The 250 uV maximum offset voltage and 5 uV/C maximum drift also limit static error in precision conditioning stages. Configure the gain so that the closed-loop bandwidth remains appropriate for the sensor and sampling system, and use guarding or a guarded layout where leakage from board contamination could matter. The 26 V/us typical slew rate adds headroom for faster transients but does not replace input filtering or sensor-specific bandwidth analysis.
Military-Temperature Feedback Control
The LT1022MH is appropriate for military-temperature feedback control when the procurement record specifically requires the military-grade H variant in an 8-terminal TO-5 package. Its precision characteristics include 250 uV maximum offset, 5 uV/C maximum drift, and guaranteed bias-current limits of 180 pA at 70 C and 4 nA at 125 C. These values support error-sensitive control loops across a broad temperature range. The 26 V/us typical slew rate provides response headroom, but loop stability still depends on the selected feedback network and compensation. Confirm the complete operating-temperature limits, supply range, and absolute maximum ratings in the manufacturer datasheet, and account for leadless or wire-lead package parasitics during board layout.
エンジニアリング参考データ: LT1022MH — 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 | LT1022AH | LT1022CH | LT1022BH | LT1022ACH | LT1022BH |
|---|---|---|---|---|---|---|
| Package | 8-terminal round TO-5 metal package | 8-terminal round TO-5 metal package | 8-terminal round TO-5 metal package | 8-terminal round TO-5 metal package | 8-terminal round TO-5 metal package | 8-terminal round TO-5 metal package |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Amplifier Architecture | Single JFET-input operational amplifier | Single JFET-input operational amplifier | Single JFET-input operational amplifier | Single JFET-input operational amplifier | Single JFET-input operational amplifier | Single JFET-input operational amplifier |
| Typical Slew Rate | 26 V/us | 26 V/us | 26 V/us | 26 V/us | 26 V/us | 26 V/us |
| Gain-Bandwidth Product | 8.5 MHz | 8.5 MHz | 8.5 MHz | 8.5 MHz | 8.5 MHz | 8.5 MHz |
主な差別化要因
- Explicit military-grade ordering designation （vs LT1022CH)
- Very low input current with high speed （vs LT1022AH)
- Precision offset and drift combined with 8.5 MHz bandwidth （vs LT1022BH)
設計ノート
Do not treat every LT1022 family suffix as automatically interchangeable. The verified distributor record identifies LT1022MH as military grade, while the exact operating-temperature range, screening, offset limits, and qualification requirements of alternative grade codes are not present in the supplied excerpts. Before replacing a part, compare the manufacturer ordering table, package drawing, absolute maximum ratings, and test requirements. Also verify that the eight lead functions match the existing TO-5 footprint rather than relying only on the round package outline.
Keep the input and feedback paths short and physically separated from output and return-current paths. For a high-impedance sensor, use guarding techniques and clean PCB insulation because contamination leakage can exceed the LT1022MH's 180 pA maximum input bias current at 70 C. Place supply-decoupling capacitors close to the relevant device pins according to the manufacturer recommendation. Because this TO-5 device has wire leads rather than a compact surface-mount pad array, pay particular attention to lead inductance and feedback-node capacitance during layout.
Select the closed-loop gain and feedback components using the 8.5 MHz gain-bandwidth product rather than assuming the same usable bandwidth at every gain. The 26 V/us typical slew rate provides large-signal response headroom, but it does not define the full-scale output swing. Verify supply voltage, common-mode range, output swing, capacitive-load behavior, and stability from the manufacturer datasheet. For photodiode or transimpedance use, include sensor and board capacitance in the noise-gain calculation before finalizing the feedback resistor.
Use the guaranteed bias-current limits at the highest operating temperature when sizing a very-high-impedance source. The verified LT1022MH data shows a maximum input bias current of 180 pA at 70 C and 4 nA at 125 C, so input-current error can rise substantially with temperature. Temperature gradients may also affect the 5 uV/C maximum offset drift. Place the amplifier away from heat sources when precision is critical, and confirm the device's complete military temperature range in the manufacturer documentation.
コンプライアンス情報
The verified excerpts do not state RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 status. AEC-Q100 is treated as not applicable because this is a military-grade operational amplifier rather than an identified automotive-qualified device; current manufacturer quality documentation should be checked before making a final compliance determination.
