LT1114IS - 4-Channel 750kHz Precision Op Amp | Analog Devices
MPN： LT1114IS ✓ 啟用中LT1114IS 概覽
An operational amplifier, or op amp, is a differential voltage-controlled amplifier with high input impedance and open-loop gain. Its feedback network determines the completed function, allowing one device to perform inverting, non-inverting, summing, filtering, buffering, and gain-control operations. The LT1114 belongs to the operational amplifier hierarchy within analog ICs, combining four precision amplifier channels into one package for instrumentation, sensor, industrial-control, and low-frequency analog systems.
The LT1114 family emphasizes low power, precision, and picoamp input bias current. Its 750 kHz gain-bandwidth product is suitable for moderate-frequency closed-loop amplification, while the 0.3 V/µs slew rate provides adequate response for common low-speed control and measurement signals. The prime-grade maximum offset voltage is 60 µV, supporting accurate DC operation when resistor matching and bias-current compensation are also managed carefully.
The four amplifier channels share a common package but provide independent signal paths. This arrangement reduces component count and simplifies routing in designs requiring several matched functional stages, such as instrumentation amplifiers, active filters, motor-control loops, and sensor-conditioning circuits. The narrow SOIC-16 footprint is considerably smaller than a wide-body competitor package, helping conserve board area without requiring a specialized land pattern.
Typical applications include low-level sensor amplification, current-loop measurement, buffer stages for analog-to-digital converters, active filtering, process-control signals, and general instrumentation. Because the gain-bandwidth product is 750 kHz, the device is best matched to low- and moderate-bandwidth signals rather than high-speed waveform, video, or RF chains.
Design with the input common-mode range, output swing, supply voltage, noise, and stability requirements in mind. Place each decoupling capacitor close to its supply pins, avoid long high-impedance input traces where possible, and check the recommended feedback-network values in the manufacturer datasheet. The LT1114IS is supplied in tube packaging for the identified ordering configuration.
This product record combines the manufacturer family description, ordering information, package details, and verified distributor metadata with practical guidance on amplifier selection, signal conditioning, and drop-in replacement evaluation.
直接替換替代品，適用於 LT1114IS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LT1114IS （相同外形與佔位） — 差異在於 Amplifier Type, Package, Slew Rate.
LT1114IS 最大額定值與電氣特性
| Amplifier Type | General Purpose |
| Number of Circuits | 4 channels |
| Architecture | Quad precision operational amplifier |
| Gain-Bandwidth Product | 750 kHz |
| Slew Rate | 0.3 V/µs |
| Prime-Grade Maximum Offset Voltage | 60 µV |
| Input Bias Current Class | Picoamp input |
| 供應電壓 | ±20 V |
| 封裝 | 16-SOIC, 0.154 in (3.90 mm) body width |
| Package Type | Narrow SOIC |
| Packaging | Tube |
| 安裝類型 | Surface mount |
LT1114IS narrow soic 腳位配置指南
LT1114IS（narrow soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LT1114IS.
請參閱 資料表 以查看完整腳位配置。
典型應用
LT1114IS 適用於 6 應用s: Precision Sensor Signal Conditioning, Industrial Process-Control Loops, Active Analog Filters, ADC and DAC Interface Buffers, Current Measurement and Amplifier Circuits, Compact Analog Control and Data-Acquisition Systems.
Precision Sensor Signal Conditioning
The LT1114IS is well suited to conditioning low-level sensor outputs because its picoamp input-bias characteristics help reduce errors when driving high-impedance sources. Four independent channels can amplify, filter, and buffer a sensor interface without requiring four separate packages. The 750 kHz gain-bandwidth product supports closed-loop gains suitable for low-frequency pressure, temperature, and position measurements, while the prime-grade 60 µV maximum offset voltage helps preserve DC accuracy. Designers should still verify input common-mode range, output swing, sensor source impedance, and bias-current compensation for each channel.
推薦
Industrial Process-Control Loops
The LT1114IS can implement four channels of analog process-control signal handling when the loop bandwidth is below its 750 kHz gain-bandwidth product and the 0.3 V/µs slew rate is sufficient for the commanded voltage steps. Typical uses include current-loop error amplifiers, actuator-signal scaling, and isolated-signal conditioning stages. The narrow 16-SOIC footprint helps place four amplifiers close to controller and connector circuitry. Verify the loop stability, allowable input common-mode voltage, and output swing against the process-control node because amplifier choice alone cannot guarantee control-loop performance.
推薦
Active Analog Filters
The LT1114IS can implement multi-stage active filters because four amplifier channels provide independent gain, summing, and inversion stages within a compact package. Its 750 kHz gain-bandwidth product suits audio-band, communications-interface, and instrumentation filtering where much higher bandwidth is unnecessary. Use the datasheet's recommended feedback and compensation values to maintain stability, and keep the closed-loop gain low enough to preserve usable bandwidth. Input-bias-current compensation should also be checked when the filter includes high-impedance resistors or a high-impedance source.
推薦
ADC and DAC Interface Buffers
The LT1114IS can provide input buffers, gain stages, and output drive around moderate-resolution analog-to-digital or digital-to-analog converters when converter settling requirements are consistent with a 750 kHz amplifier bandwidth. Picoamp input bias current is useful when the converter input is driven through high-value resistors, while the four-channel arrangement supports multiplexed or multi-range analog front ends. Validate the converter's required settling time, output impedance, and acquisition window, and confirm that the amplifier output swing and common-mode range satisfy the converter interface. Decoupling should be arranged to minimize high-frequency coupling between converter and amplifier supply nodes.
推薦
Current Measurement and Amplifier Circuits
The LT1114IS is suitable for low-frequency current-measurement amplifiers because its picoamp input bias characteristics reduce current error in feedback networks with high resistance. The four channels can be assigned to input amplification, differential subtraction, output buffering, and reference or gain-support functions. Its 60 µV prime-grade maximum offset voltage helps maintain accuracy in current-to-voltage conversion, while the 0.3 V/µs slew rate supports ordinary measurement transients. The exact shunt topology determines whether offset, bias current, or common-mode voltage imposes the dominant error, so evaluate those parameters together.
推薦
Compact Analog Control and Data-Acquisition Systems
The LT1114IS helps reduce component count in compact control and data-acquisition systems that require several precision analog functions. Four channels can combine signal conditioning, active filtering, baseline reference buffering, and actuator output drive in one narrow 16-SOIC package. The 750 kHz gain-bandwidth product is adequate for many low-speed measurement paths, while picoamp input bias supports high-impedance circuit nodes. A successful implementation must include local supply bypassing, careful grounding, and verification of each channel's common-mode and swing requirements. The compact package saves area, but it does not remove the need for adequate analog layout discipline.
推薦
推薦產品摘要
工程參考資料，適用於 LT1114IS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LT1114S |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 16-SOIC | 16-SOIC |
| Number of Circuits | 4 | 4 |
| Amplifier Type | General Purpose | General Purpose |
| Gain-Bandwidth Product | 750 kHz | 750 kHz |
| Slew Rate | 0.3 V/µs | 0.3 V/µs |
| Input Bias Current Class | Picoamp input | Picoamp input |
主要差異化特點
- Four precision channels in a narrow package (對比LT1114S)
- Documented precision and bandwidth balance (對比LT1114S)
- Picoamp input bias for high-impedance conditioning (對比LT1114S)
設計說明
Place the supply-decoupling capacitor immediately adjacent to the applicable power and ground pins, with a short and low-inductance return path. Keep analog input and output routing away from digital clocks, relays, and switching-node traces. Because the LT1114IS uses a narrow 16-SOIC body, confirm the land pattern against the manufacturer package drawing; the narrow outline is not interchangeable with a wide-body 16-pin SOIC footprint.
Account for input-bias-current error before selecting feedback resistors for high-impedance sources. The picoamp input-bias characteristic is useful in this environment, but very large resistor values can still introduce noise and offset sensitivity. Use the datasheet's bias-current compensation method when an amplifier stage inverts, and check source-node capacitance because excessive capacitance combined with high resistance can alter frequency response.
Do not substitute a wide-body 16-pin SOIC merely because both packages have 16 pins. The manufacturer datasheet notes that competitors use wide packages occupying more board area, so their lead spacing and land patterns differ. Confirm the narrow LT1114IS package drawing, pin orientation, suffix grade, and electrical limits before approving a replacement or placing a PCB order.
Plan the power rails so that the input common-mode voltage and output swing remain within their operating limits across supply tolerance and temperature. The identified ±20 V rating describes the supported supply magnitude, not permission to use any signal node at that voltage. Establish the actual signal ranges first, then use the manufacturer electrical-characteristics table to verify headroom and channel behavior.
合規資訊
The manufacturer family page identifies the LT1112/LT1114 op-amp family, but the exact environmental and material declarations for LT1114IS were not established in the verified product records. Confirm current declarations with Analog Devices before regulated production use.
