LT1639HS - 1.2MHz Quad Rail-to-Rail Op Amp | ADI
部品番号: LT1639HS ✓ 生産中LT1639HS 概要
An operational amplifier is a gain-control device that uses high open-loop gain to amplify small voltage differences. The rail-to-rail input stage accepts signals near the supply limits, while the rail-to-rail output stage can swing close to both rails. In the broader hierarchy, an operational amplifier belongs to the amplifier IC category within integrated circuits and is commonly used for buffering, filtering, sensing, and closed-loop control.
The LT1639 family combines four amplifiers with a 1.2 MHz gain-bandwidth product and 0.4 V/us slew rate. Its rail-to-rail input and output operation supports systems in which signals approach the available supply range. The 14-SOIC package provides a conventional surface-mount footprint, while the -40°C to +125°C temperature range supports industrial and extended-temperature equipment.
Low-power operation makes the LT1639 useful when four analog channels are required without the drive current of higher-speed amplifiers. The 350 uV input-offset specification represents the device's input imbalance, which matters in precision current-sense and sensor-conditioning paths. Its 1.2 MHz bandwidth is adequate for audio and general instrumentation rather than high-speed video or communications signaling.
Typical uses include four-channel sensor acquisition, low-frequency active filters, audio preamplification, battery-powered instrumentation, and industrial control interfaces. One package can implement four gain stages or four independent buffers. When driving heavy capacitive loads, add the required isolation resistance and check the stability behavior against the load capacitance before finalizing the layout.
Keep the analog input traces short, provide a solid ground reference, and place input and output decoupling capacitors close to the supply pins. Account for input bias-current errors when working with high-impedance sources, and verify offset, bias current, output swing, and noise at the intended supply voltage. The LT1639HS datasheet pin-description table should be used when assigning tracks because the complete pin names are not reproduced on this page.
This product page organizes the LT1639HS specifications, same-family alternatives, application guidance, and design considerations into a practical selection reference. It also helps engineers distinguish the HS temperature-grade ordering options by package, temperature marking, and electrical behavior before committing a PCB layout.
ドロップイン代替品: LT1639HS — 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: LT1639HS （同一形状・フットプリント） — 相違点: Package, Power Class.
LT1639HS#PBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT1639CS#PBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT1639IS
✅ ドロップイン価格はお問い合わせください
データシートを見る →LT1639IN#PBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT1639IS#PBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT1639HS 最大定格＆電気的特性
| Number of Amplifiers | 4 amplifiers |
| Amplifier Type | General-purpose operational amplifier |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.4 V/us |
| Supply Voltage Range | 2.5 V to 44 V |
| Input Offset Voltage | 350 uV |
| Input Common-Mode Range | Rail-to-rail input |
| Output Swing | Rail-to-rail output |
| Over-the-Top Operation | Supported |
| Power Class | Micropower operation |
| パッケージ | 14-SOIC, 0.154 inch width |
| Package Width | 3.90 mm |
| ピン数 | 14 pins |
| 実装タイプ | Surface mount |
| 動作温度範囲 | -40°C to +125°C |
| Orderable Packaging | Tube |
LT1639HS 3.90 mm ピン配置ガイド
LT1639HS (3.90 mm 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: LT1639HS.
詳細は データシート をご参照ください。
主な用途
LT1639HS の用途: 6 件s: Industrial Sensor Signal Conditioning, Battery-Powered Portable Instruments, Audio Preamplification, Active Filtering and Control Loops, Precision DC Measurement, Communications Interface Conditioning.
Industrial Sensor Signal Conditioning
The LT1639HS fits four-channel industrial sensor conditioning because it integrates four rail-to-rail input/output amplifiers while operating from 2.5 V to 44 V. Its 1.2 MHz gain-bandwidth product is suitable for amplifiers, level shifters, and first-stage buffers covering slow sensor signals. The -40°C to +125°C temperature range supports extended industrial environments, although each sensor type still requires verification of input bias current, offset error, and common-mode limits. Use one amplifier per channel for gain or buffering and the remaining channels for active filtering, current-to-voltage conversion, or output isolation. Keep high-impedance sensor traces short and guard against leakage on the board surface.
おすすめ
Battery-Powered Portable Instruments
The LT1639HS is appropriate for portable measurement equipment where four analog channels are needed without the power demand of a high-speed quad amplifier. Its low-power operating concept, 2.5 V minimum supply, rail-to-rail input, and rail-to-rail output allow operation near the limits of a compact battery rail. The 1.2 MHz bandwidth is suitable for temperature, pressure, light, and resistance sensors whose signals change slowly. In a portable instrument, the four amplifiers can provide instrumentation amplification, active filtering, and buffered sensor outputs. Designers should account for the amplifier quiescent current, source impedance, leakage, and the reduction in dynamic range when operating close to the supply rails.
おすすめ
Audio Preamplification
The LT1639HS can implement four low-level audio preamplifier or summing stages in one 14-SOIC package. Its 0.4 V/us slew rate and 1.2 MHz gain-bandwidth product are more than adequate for many audio-band and general-purpose audio applications, while rail-to-rail input and output stages improve signal range at low supply voltages. The four channels can support microphone, line, headphone-buffer, and tone-shaping functions. Stable operation around audio frequencies requires suitable feedback values and gain-bandwidth headroom; avoid excessive capacitive loading on outputs. The SOIC footprint also simplifies hand assembly and repair compared with a very fine-pitch package.
おすすめ
Active Filtering and Control Loops
The LT1639HS is useful in active filter and control-loop designs requiring several independently configured amplifiers. Its 1.2 MHz gain-bandwidth product supports moderate-bandwidth low-pass, high-pass, and band-pass stages, and rail-to-rail output operation can maximize available signal swing in low-voltage control systems. Quad-channel use reduces component count when implementing a two-stage filter plus buffer or a multi-axis analog control interface. Set resistor and capacitor values for the intended corner frequency, and verify noise gain and closed-loop stability across temperature and supply tolerance. Place feedback components close to the device and route sensitive high-impedance nodes away from switching power nodes.
おすすめ
Precision DC Measurement
The LT1639HS can support precision DC measurement paths where the 350 uV input-offset specification is important and the signal bandwidth remains below approximately 1.2 MHz. Four channels can be assigned to low-level sensor inputs, excitation buffering, differential instrumentation, or reference conditioning. Rail-to-rail input operation is valuable around a mid-supply reference, while the output stage can drive moderate loads without requiring a separate buffer. For highest accuracy, account for input bias current, offset drift, bias-current cancellation requirements, and resistor-network matching. A low-reference-voltage difference amplifier should also be evaluated against the input and output common-mode limits at the selected supply.
おすすめ
Communications Interface Conditioning
The LT1639HS is suitable for slow communications-interface conditioning where four channels can receive, bias, filter, or buffer low-frequency signals. Its over-the-top input capability can support systems whose signal levels exceed the nominal supply range under defined operating conditions, while the 44 V maximum supply provides ample headroom for industrial interfaces. The 1.2 MHz bandwidth is appropriate for many UART, control-bus, sensor-bus, and analog telemetry paths but not for high-speed differential data lines. Use it for analog stages adjacent to digital transceivers rather than as a direct high-speed line driver. Confirm input overvoltage limits, logic thresholds, isolation requirements, and channel-to-channel behavior in the complete interface design.
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: LT1639HS — 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 | LT1639HS#PBF | LT1639CS#PBF | LT1639IS | LT1639IN#PBF | LT1639IS#PBF |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers |
| Gain-Bandwidth Product | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz |
| Slew Rate | 0.4 V/us | 0.4 V/us | 0.4 V/us | 0.4 V/us | 0.4 V/us | 0.4 V/us |
| Input and Output Operation | Rail-to-rail input and output | Rail-to-rail input and output | Rail-to-rail input and output | Rail-to-rail input and output | Rail-to-rail input and output | Rail-to-rail input and output |
| Over-the-Top Capability | Supported | Supported | Supported | Supported | Supported | Supported |
| Temperature and Ordering Grade | HS grade, -40°C to +125°C | HS grade with PBF ordering suffix | CS grade with PBF ordering suffix | IS grade | IN grade with PBF ordering suffix | IS grade with PBF ordering suffix |
主な差別化要因
- Four amplifiers share one compact package （vs LT1639IS)
- Rail-to-rail input and output operation （vs LT1639IN#PBF)
- Wide supply operation for industrial and portable systems （vs LT1639CS#PBF)
- Low-power general-purpose signal conditioning （vs LT1639HS#PBF)
設計ノート
Place the supply bypass capacitor close to the LT1639HS supply pins and connect it with a short, low-inductance ground return. The quad amplifier shares the same package and supply pins, so a distant capacitor can allow supply noise and transient current to couple into all four channels. Route each input directly to its assigned pin, avoid shared high-impedance copper where practical, and keep output routes separated from adjacent input and reference nets.
Do not assume that rail-to-rail output means the output can reach either supply rail exactly. Check the output-voltage limits under the intended load and supply voltage using the manufacturer electrical-characteristics tables. Likewise, over-the-top input capability does not remove all input-protection or absolute-maximum restrictions. Verify the signal amplitude, supply state, and temperature at every connector before applying a transient or out-of-range signal.
The 1.2 MHz gain-bandwidth product limits the useful small-signal bandwidth of each amplifier, while the 0.4 V/us slew rate limits large-signal transitions. Select feedback resistors and capacitors so the closed-loop response retains adequate phase margin, and keep high-value compensation components close to the relevant pins. For capacitive loads, use the manufacturer stability guidance or an isolation resistor rather than adding capacitance directly at the output.
Estimate amplifier dissipation from the actual supply voltage, quiescent current, output load current, and output voltage rather than using nominal output-current ratings alone. For a simplified estimate, use P = VCC x IQ plus VOUT x ILOAD under the applicable operating mode, while excluding internal power that remains inside the device. Compare the resulting worst-case value with the package thermal limits and account for elevated ambient temperature and nearby heat sources.
コンプライアンス情報
The LT1639HS#PBF ordering code includes a lead-free marking, but formal RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals status require confirmation from the current manufacturer or assembly documentation.
