LT1639HS - 1.2MHz Quad Rail-to-Rail Op Amp | ADI
MPN: LT1639HS ✓ Hoạt độngLT1639HS Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho LT1639HS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LT1639HS (cùng hình factor và footprint) — khác nhau ở Package, Power Class.
LT1639HS#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LT1639CS#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LT1639IS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LT1639IN#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LT1639IS#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LT1639HS Tỷ lệ tối đa & tính chất điện
| 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 |
| Hộp | 14-SOIC, 0.154 inch width |
| Package Width | 3.90 mm |
| Số chân | 14 pins |
| Kiểu lắp đặt | Surface mount |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Orderable Packaging | Tube |
Hướng dẫn cấu hình chân LT1639HS 3.90 mm
Cấu hình chân cho LT1639HS (3.90 mm gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LT1639HS.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LT1639HS phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LT1639HS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Four amplifiers share one compact package (vsLT1639IS)
- Rail-to-rail input and output operation (vsLT1639IN#PBF)
- Wide supply operation for industrial and portable systems (vsLT1639CS#PBF)
- Low-power general-purpose signal conditioning (vsLT1639HS#PBF)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
