LT1014MJ - 4-Channel 5V-44V Precision Op Amp | Texas Instruments
部品番号: LT1014MJ ✓ 生産中LT1014MJ 概要
A precision operational amplifier is a voltage-gain component that uses negative feedback to amplify small voltage differences while maintaining accuracy, stability, and common-mode performance. The LT1014MJ belongs to the operational-amplifier hierarchy, which includes instrumentation amplifiers, buffer amplifiers, comparators, and general-purpose analog signal-conditioning ICs. Its common-mode input range includes ground, making it useful in systems where signals approach the lower supply rail.
The principal benefits are its combination of precision, low noise, low supply current, and wide operating temperature range. Four independent amplifiers in one package reduce board area and simplify instrumentation systems requiring multiple closely related channels. Operation from a single 5 V supply supports portable and industrial equipment, while dual ±15 V operation accommodates higher-amplitude bipolar signals. The ceramic DIP package provides mechanical robustness for industrial, aerospace, and military-qualified systems operating from -55°C to +125°C.
Internally, the LT1014MJ is designed around precision bipolar amplifier stages. The low offset-voltage temperature coefficient helps maintain calibration accuracy as ambient temperature changes, while low noise is valuable for resolving small sensor outputs. Its common-mode input range including ground permits direct sensing of low-level signals without a mid-supply reference, although exact offset voltage, input bias current, noise density, gain-bandwidth product, slew rate, and output-swing limits are not supplied in the verified data and must be checked in the manufacturer datasheet.
Typical uses include strain-gauge and thermocouple signal conditioning, battery-powered precision instrumentation, 4 mA to 20 mA current-loop transmitters, active filters, gain blocks, and multiple-limit threshold detection. The four-amplifier organization is especially helpful when a system needs differential input stages, output drivers, or multiple filter sections while maintaining consistent device characteristics.
When designing around the LT1014MJ, verify the complete input common-mode range, output swing, supply-current behavior, stability requirements, and offset behavior against the selected supply and load. Decoupling should follow the manufacturer guidance, and exposed inputs must be kept within their valid common-mode range. In low-level instrumentation, input bias-current and source-impedance errors may dominate even when the amplifier itself is precise.
This product page consolidates verified manufacturer and distributor information, distinguishes the military-temperature 14-pin CDIP ordering code from related LT1014 variants, identifies packaging-specific drop-in candidates, and adds practical selection guidance. It also makes clear where verified pricing or detailed electrical limits were unavailable rather than substituting estimated values.
ドロップイン代替品: LT1014MJ — 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: LT1014MJ （同一形状・フットプリント） — 相違点: Package, Supply Current.
LT1014AMJ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1014BMJ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1014CMJ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LT1014DMJ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
OP441WP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT1014MJ 最大定格＆電気的特性
| Amplifier Count | 4 amplifiers |
| Product Type | Quad precision operational amplifier |
| Minimum Single-Supply Operating Voltage | 5 V |
| Maximum Total Supply Voltage | 44 V |
| Supported Dual Supply | ±15 V |
| パッケージ | 14-pin CDIP (J) |
| 実装タイプ | Through-hole |
| Minimum Operating Temperature | -55°C |
| Maximum Operating Temperature | +125°C |
| Common-Mode Input Range | Includes ground |
| Noise Performance | Low noise; exact value not provided |
| 電源電流 | Low supply current; exact value not provided |
| RoHS ステータス | unknown |
| REACH Status | unknown |
LT1014MJ ピン構成
| ピン 1 | OUT A — Output of amplifier A |
| ピン 2 | IN- A — Inverting input of amplifier A |
| ピン 3 | IN+ A — Non-inverting input of amplifier A |
| ピン 4 | V- — Negative supply connection |
| ピン 5 | IN+ B — Non-inverting input of amplifier B |
| ピン 6 | IN- B — Inverting input of amplifier B |
| ピン 7 | OUT B — Output of amplifier B |
| ピン 8 | OUT C — Output of amplifier C |
| ピン 9 | IN- C — Inverting input of amplifier C |
| ピン 10 | IN+ C — Non-inverting input of amplifier C |
| ピン 11 | V+ — Positive supply connection |
| ピン 12 | IN+ D — Non-inverting input of amplifier D |
| ピン 13 | IN- D — Inverting input of amplifier D |
| ピン 14 | OUT D — Output of amplifier D |
主な用途
LT1014MJ の用途: 6 件s: Strain-Gauge Signal Conditioning, Thermocouple Instrumentation, 4 mA to 20 mA Current-Loop Transmitter, Battery-Powered Precision Instruments, Active Precision Filters, Multiple Threshold Detection.
Strain-Gauge Signal Conditioning
The LT1014MJ fits strain-gauge front ends that require four precision amplification channels in one package. A typical bridge conditioner uses differential input stages, active gain blocks, and output filtering, so the device's 5 V minimum supply, common-mode input range including ground, and low offset-voltage temperature coefficient are useful. The common-mode range is particularly relevant when the bridge signal sits near ground. Engineers should confirm input bias current, offset voltage, noise, and output swing in the manufacturer data sheet, then evaluate source-impedance error at the selected bridge resistance.
おすすめ
Thermocouple Instrumentation
The LT1014MJ is suitable for thermocouple measurement circuits that amplify small differential voltages while operating from 5 V or dual ±15 V supplies. Four channels allow several temperature channels to share consistent amplifier characteristics, and the common-mode input range includes ground supports low-level sensor signals. Low offset-voltage temperature coefficient can help preserve measurement stability as temperature changes. The design must still account for thermocouple polarity, cold-junction compensation, input bias current, electrical noise, and the amplifier's verified output-swing limits.
おすすめ
4 mA to 20 mA Current-Loop Transmitter
The LT1014MJ can provide the precision gain and signal-conditioning functions required in a 4 mA to 20 mA current-loop transmitter. Its single 5 V operation and four amplifier channels make it useful for conditioning a sensor, scaling the result, and driving the loop interface. The common-mode input range including ground is advantageous when processing signals near the lower rail. Precise external resistors, suitable input and output filtering, and careful common-mode and swing verification are required because loop accuracy depends on the complete signal path rather than the amplifier alone.
おすすめ
Battery-Powered Precision Instruments
The LT1014MJ is explicitly identified for battery-powered precision instrumentation, where low supply current and precision are important. Its 5 V single-supply operation is compatible with many portable measurement systems, while four channels can reduce the number of packages needed for amplification, filtering, and threshold functions. The common-mode input range includes ground simplifies low-level signal handling. Actual battery life depends on total supply current, output state, operating temperature, and peripheral circuitry, none of which should be inferred from the product family description alone.
おすすめ
Active Precision Filters
The four precision amplifiers in the LT1014MJ can implement active filter sections, gain blocks, and cascaded signal-processing stages. The device supports single 5 V and dual ±15 V supplies, giving designers flexibility in instrument architecture, while the common-mode input range including ground is useful for low-level filtering. Each filter requires stable resistor and capacitor selection, adequate output loading, and verification of noise and gain behavior over the operating frequency range. The verified data identifies low noise and high gain but does not provide gain-bandwidth or slew-rate figures needed for final filter calculations.
おすすめ
Multiple Threshold Detection
The LT1014MJ supports multiple-limit threshold detection by providing four amplifiers for comparison, reference buffering, and signal amplification. Its precision characteristics and broad temperature range are useful in industrial monitoring systems that operate from -55°C to +125°C. The common-mode input range includes ground permits detection of low-level process signals, while 5 V single-supply operation simplifies low-voltage control systems. Resistor tolerances, reference accuracy, input overvoltage protection, and output-state behavior remain important because the complete threshold circuit determines the actual accuracy.
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: LT1014MJ — 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 | LT1014AMJ | LT1014BMJ | LT1014CMJ | LT1014DMJ | OP441WP |
|---|---|---|---|---|---|---|
| Package | 14-pin CDIP (J) | 14-pin CDIP (J) - same | 14-pin CDIP (J) - same | 14-pin CDIP (J) - same | 14-pin CDIP (J) - same | 14-pin through-hole package - same footprint family |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Amplifier Count | 4 | 4 | 4 | 4 | 4 | 4 |
主な差別化要因
- Wide temperature operation for rugged instrumentation （vs LT1014CN)
- Four precision amplifiers in one ceramic DIP （vs LT1014AMJ)
- Single- and dual-supply operating capability （vs OP441WP)
設計ノート
Verify the LT1014MJ against the manufacturer's supply, quiescent-current, input common-mode, and output-swing limits for the exact operating condition. Although the device supports 5 V single supply and ±15 V dual supply, those operating modes do not make every input or output range valid. Confirm the external circuit's maximum and minimum voltages before power-up and provide local bypass capacitance in accordance with the manufacturer guidance.
Keep sensitive instrumentation paths short and place input compensation, gain-setting, and filtering components close to the relevant amplifier pins. In a 14-pin through-hole design, thermal and electrical layout is less constrained than in high-speed packages, but long input traces can still add noise and leakage. Maintain a clean ground reference, avoid routing inputs beside switching nodes, and use a consistent grounding strategy for sensitive analog and power-return currents.
Do not assume that identical package dimensions guarantee an equivalent amplifier. When substituting LT1014AMJ, LT1014BMJ, LT1014CMJ, LT1014DMJ, or OP441WP, compare offset voltage, input bias current, noise, gain-bandwidth product, slew rate, output swing, common-mode range, and temperature limits. Revisions can share the same four-channel 14-pin architecture while differing in revision-specific limits, so the manufacturer data sheet remains the controlling document.
For thermocouple, strain-gauge, and current-loop inputs, calculate source-impedance error and filter the complete signal chain rather than the amplifier alone. High-impedance sensors can amplify input bias-current effects, while cable and reference grounding can introduce common-mode noise. Use the lowest practical source impedance, appropriate filtering, and verified cold-junction or reference compensation, then validate gain and error across temperature from -55°C to +125°C.
コンプライアンス情報
The supplied manufacturer and distributor excerpts do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. LT1014MJ is a military-temperature ordering option under LT1014-MIL, but AEC-Q100 is an automotive qualification and is not applicable based on the available evidence.
