LT1179CJ - 17uA Quad Precision Op Amp | Analog Devices
MPN： LT1179CJ ✗ 停產LT1179CJ 概覽
A precision operational amplifier is a low-noise, high-gain analog signal-conditioning device used to amplify weak sensor, instrumentation, control, and feedback signals. The LT1179CJ belongs to the micropower operational-amplifier category, combining four amplifiers in one package with very low supply-current demand. This makes it suitable for battery-powered instrumentation and other systems where amplifier power consumption must remain small.
The LT1179CJ is specified as a general-purpose, four-circuit amplifier. Its precision characteristics include low offset voltage, low offset current, and low input bias current, helping reduce signal error when the amplifier is used with sensors, transducers, or high-impedance sources. The device is intended for single-supply systems, where the output signal must be biased above ground, as well as conventional dual-supply circuits using ±15V.
The LT1179CJ can be used in low-power sensor interfaces, precision signal-conditioning circuits, instrumentation amplifiers, data-acquisition front ends, battery-powered measurement systems, and low-current feedback loops. Its 17uA-per-amplifier maximum supply current is particularly useful when four active amplifiers would otherwise contribute a larger aggregate supply-current requirement.
For single-supply operation, confirm the input and output common-mode range, output swing, and load requirements against the manufacturer datasheet before finalizing the biasing network. Decoupling capacitors should be placed close to the power pins, and unused amplifier channels should be configured according to the recommended stable-output method.
This product page combines the manufacturer product information, distributor package identification, and application-oriented engineering guidance. Use the official Analog Devices datasheet for the complete electrical characteristics, pin assignments, ordering information, and test conditions.
直接替換替代品，適用於 LT1179CJ — 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。
此產品無可直接替換的替代品。
申請替代品LT1179CJ 最大額定值與電氣特性
| Amplifier Type | Precision operational amplifier |
| Number of Circuits | 4 circuits |
| Supply Current per Amplifier | 17uA maximum |
| Offset Voltage | 70uV maximum |
| Offset Current | 250pA maximum |
| Input Bias Current | 5nA maximum |
| Optimized Supply Voltage | 5V single supply |
| Additional Supply Specification | ±15V supplies |
| 封裝 | 14-pin CERDIP (0.300 inch, 7.62mm) |
| 安裝類型 | Through-hole |
| 腳位數 | 14 pins |
| Temperature Grade | Commercial |
| Product Classification | General-purpose amplifier |
LT1179CJ 14-pin cerdip (0.300 inch, 7.62mm) 腳位配置指南
LT1179CJ（14-pin cerdip (0.300 inch, 7.62mm) 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： LT1179CJ.
請參閱 資料表 以查看完整腳位配置。
典型應用
LT1179CJ 適用於 6 應用s: Battery-Powered Sensor Interfaces, Precision Data-Acquisition Front Ends, Portable Measurement Instruments, Low-Current Feedback Control, Precision Bridge and Transducer Amplification, Low-Power Industrial Signal Conditioning.
Battery-Powered Sensor Interfaces
The LT1179CJ suits low-level sensor conditioning where four analog channels must operate from a constrained power budget. Its maximum supply current of 17uA per amplifier limits the contribution of the four integrated amplifiers, while 70uV maximum offset voltage and 5nA maximum input bias current help preserve small sensor signals. The amplifier is optimized for 5V single-supply operation, making it suitable for portable measurement systems that require level shifting or gain stages near the sensor. Confirm the input common-mode range and output swing against the sensor signal before finalizing the biasing network.
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Precision Data-Acquisition Front Ends
The four amplifiers in the LT1179CJ can provide gain, filtering, level shifting, and drive functions close to a sensor or converter input. Its maximum offset voltage of 70uV, offset current of 250pA, and input bias current of 5nA are useful where amplifier-generated errors would be significant relative to the measured signal. Operation from a single 5V rail supports compact acquisition systems, while the availability of ±15V specifications allows the same device family to fit bipolar laboratory instrumentation. Apply appropriate anti-alias filtering and verify settling behavior for the target signal bandwidth.
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Portable Measurement Instruments
The LT1179CJ is appropriate for handheld or battery-operated instruments that need several precision analog channels without allocating substantial supply current to each amplifier stage. The 17uA maximum supply current per amplifier is the central benefit, and the device's four-circuit configuration can reduce the number of packages required for gain and buffering functions. At a 5V supply, engineers can design input conditioning around transducers, resistive sensors, and control feedback while keeping system power low. The commercial-grade part and 14-pin through-hole package are particularly convenient for instrument-panel and laboratory equipment layouts that require socketed or leaded assembly.
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Low-Current Feedback Control
The LT1179CJ can implement error amplifiers, transconductance loops, and feedback elements in low-power control systems. Its precision DC characteristics help reduce output error, while the low per-amplifier supply current supports designs where continuous operation is required. Four channels provide flexibility for sensor feedback, reference buffering, and auxiliary control functions within a single 14-pin CERDIP package. For stable loop closure, check gain-bandwidth and phase-margin requirements in the manufacturer documentation and keep the compensation network close to the relevant amplifier pins.
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Precision Bridge and Transducer Amplification
The LT1179CJ can amplify the small differential outputs produced by resistive bridges and other passive transducers. Low offset voltage, low offset current, and low input bias current are important because these errors can create measurement offsets or disturb high-impedance sensor sources. The micropower operating current allows continuous bridge monitoring without making the sensor dominates the system power budget. A 5V single-supply configuration may require mid-supply biasing for bipolar sensor signals, so verify the common-mode range and output swing before selecting resistor values and operating points.
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Low-Power Industrial Signal Conditioning
The LT1179CJ is useful for conditioning slow industrial sensor signals when each channel must consume little power. A 5V supply simplifies deployment near field instrumentation, while the 70uV maximum offset voltage supports precision measurements without requiring a larger general-purpose op amp. Four integrated channels can handle inputs, filtering, and active feedback in a compact through-hole implementation. Designers should account for input protection, common-mode limits, grounding, and output drive when connecting external field wiring, and should verify the manufacturer operating-temperature limits before using the commercial-grade part in harsh environments.
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推薦產品摘要
工程參考資料，適用於 LT1179CJ — 比較、設計指引及合規資訊。
選型指南
設計說明
The maximum supply-current specification is 17uA per amplifier, so four active channels can contribute as much as 68uA under the manufacturer's stated conditions. Include this figure when sizing the supply and calculate the total system demand from sensors, references, and digital control circuitry as well. For single-supply operation, use the 5V-optimized configuration and verify that the complete signal path remains inside the amplifier's input and output ranges.
Place the supply-decoupling capacitor close to the device power pins and provide a low-impedance return path for the ground connection. Because the LT1179CJ uses a 14-pin through-hole CERDIP package, maintain adequate spacing between adjacent pins for soldering and avoid excessive thermal stress during assembly. Follow the manufacturer package drawing for the land pattern and pin orientation rather than inferring dimensions from the distributor description.
Do not treat the 5V single-supply optimization as permission to ignore common-mode-range limitations. Confirm that source signals, bias points, and output targets remain within the usable range, particularly in battery-powered designs where the rail may sag. Also account for input bias current when driving high-impedance sources and configure unused amplifier channels according to the datasheet's stability guidance.
合規資訊
The distributor information identifies the LT1179CJ as a commercial-grade component but does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 qualification is not stated.
