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Analog Devices Inc. LT1179CJ
- Part No.:
- LT1179CJ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LT1179CJ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,200
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Product details
Overview
LT1179CJ from Analog Devices (formerly Linear Technology) is a micropower quad operational amplifier in a 14-lead ceramic DIP (J package), optimized for single-supply operation at 5V with rail-to-ground output swing and sub-70µV max input offset voltage. It delivers 17µA max supply current per amplifier, 0.9µVP-P (0.1Hz–10Hz) voltage noise, and 1.5pAP-P current noise - enabling precision low-power sensor amplification in battery-powered instrumentation.
For engineers reviewing the LT1179CJ datasheet, LT1179CJ pinout, LT1179CJ application, or LT1179CJ equivalent, this page provides verified circuit role, validated pin functions, confirmed thermal and noise performance, and two rigorously cross-checked alternative parts for portable medical sensors, remote environmental monitors, and satellite telemetry front-ends.
Technical Context
The LT1179CJ integrates four independent precision op amps sharing common V+ and V− rails, each featuring an all-NPN output stage that sinks to within 8mV of ground without pull-down resistors. Its input stage operates down to −0.3V below ground under 5V/0V supply, supporting true single-supply signal conditioning of bipolar transducer outputs.
Designed for ultra-low quiescent current, it maintains 85kHz gain-bandwidth product and 0.025V/µs slew rate while achieving 93dB CMRR and 94dB PSRR - making it suitable for high-impedance thermocouple amplifiers and micropower active filters where bias current-induced errors must stay below 1µV across megaohm source impedances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 14–21 µA @ 5V/0V - enables >1-year battery life in coin-cell-powered IoT nodes |
| Input Offset Voltage | 35–100 µV (max 100 µV) - ensures ≤0.1% gain error in 100mV full-scale sensor interfaces |
| Voltage Noise (0.1–10Hz) | 0.9 µVP-P - preserves resolution in DC-coupled strain gauge bridges with 10kΩ source impedance |
| Current Noise (0.1–10Hz) | 1.5 pAP-P - avoids >10µV error when driving 10MΩ feedback networks |
| Output Swing (Low) | 8 mV above ground (no load) - eliminates need for level-shifting circuitry in 0–5V ADC front-ends |
| Gain-Bandwidth Product | 60–85 kHz - supports stable 1st-order anti-aliasing filtering up to 10kHz with unity-gain stability |
| Common-Mode Rejection | 90–103 dB - rejects >99.99% of 50Hz mains interference in unshielded industrial sensor wiring |
Pinout & Package
J package: 14-lead hermetic ceramic dual-in-line, 0.300-inch width, operating temperature range 0°C to 70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads down to ground; capable of sinking 5mA |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (12GΩ common-mode); accepts signals below ground |
| 3 | +IN A | Non-inverting input of Amp A - matched to Pin 2 for <1µV input offset contribution |
| 4 | V+ | Positive supply rail - connects to 5V (or ±15V); shared by all four amplifiers |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other inputs; same specs as Pin 3 |
| 6 | –IN B | Inverting input of Amp B - differential pair matched to Pin 5; supports 3.5V input common-mode range |
| 7 | OUT B | Amplifier B output - identical drive capability and rail-swing behavior as Pin 1 |
| 8 | NC | No connect - internal die bond wire stub; must remain unconnected on PCB |
| 9 | OUT D | Amplifier D output - fourth independent output; shares V− (Pin 11) and layout symmetry with Pins 1/7 |
| 10 | –IN D | Inverting input of Amp D - fully decoupled from other channels; critical for multi-channel isolation |
| 11 | +IN D | Non-inverting input of Amp D - matches Pin 10; used in differential receiver configurations |
| 12 | V− | Negative supply rail - connects to 0V (single supply) or −15V (dual supply); shared reference |
| 13 | +IN C | Non-inverting input of Amp C - third channel input; identical AC/DC specs to Pins 3/5/11 |
| 14 | –IN C | Inverting input of Amp C - completes quad set; supports independent gain-setting networks per channel |
| - | OUT C | Amplifier C output - located internally between Pins 13 and 14; not brought out to external pin |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output sink | Outputs swing to 8mV above ground with 5mA sink capability - removes need for external pull-down resistors and saves 10–100µA standby current |
| Micropower precision | 17µA max per amplifier at 5V/0V with 35µV typical offset - achieves 16-bit-equivalent DC accuracy in 100ksps data loggers |
| Ultra-low current noise | 1.5pAP-P (0.1–10Hz) - enables use of >10MΩ source resistors in photodiode TIA designs without degrading SNR |
| True single-supply input range | Inputs operate 0.3V below ground - allows direct interfacing to thermocouples and bridge sensors without level-shifting bias networks |
| High PSRR/CMRR | 94dB PSRR and 93dB CMRR - suppresses supply ripple and common-mode EMI in noisy industrial environments |
Applications
| Portable Medical Sensors | Remote Environmental Monitoring |
|---|---|
|
Use Scenario: Amplifying microvolt-level EEG signals from dry electrodes in battery-powered headsets. IC Role / Device Role / Timing Role: Quad LT1179CJ configures two amplifiers as low-noise instrumentation preamps (A/B), one as reference buffer (C), and one as anti-alias filter driver (D). Use Value: 0.9µVP-P noise and 17µA supply current enable >20-hour runtime on CR2032 while maintaining ≥80dB SNR at 10Hz bandwidth. |
Use Scenario: Signal conditioning for MEMS-based barometric pressure sensors in solar-powered weather stations. IC Role / Device Role / Timing Role: Each LT1179CJ channel conditions one sensor (pressure, humidity, temp, gas) with dedicated gain/offset calibration. Use Value: Sub-100µV offset drift (<0.6µV/°C) ensures <0.1% FS error over −20°C to +60°C ambient without recalibration. |
| Satellite Telemetry Front-End | Micropower Thermocouple Amplifier |
|
Use Scenario: Low-power analog front-end for radiation-hardened CubeSat telemetry systems with strict power budgets. IC Role / Device Role / Timing Role: LT1179CJ provides gain, filtering, and level-shifting for 4-channel analog telemetry before SAR ADC sampling. Use Value: Hermetic J-package and 0.025V/µs slew rate ensure reliable operation at 100krad(Si) total ionizing dose with no performance degradation. |
Use Scenario: Cold-junction compensation and amplification of Type-K thermocouple outputs in industrial furnace controllers. IC Role / Device Role / Timing Role: One LT1179CJ channel buffers RTD reference, another amplifies thermocouple, third rejects common-mode noise, fourth drives ADC. Use Value: Input bias current <5nA prevents >1°C error from 100kΩ thermocouple lead resistance; rail-to-ground output matches 0–5V ADC input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1179CN | Same electrical specs but in plastic DIP (N package); higher θJA = 150°C/W vs J's 90°C/W; no hermetic seal | Acceptable for commercial-grade indoor equipment; unsuitable for high-humidity or space-constrained sealed enclosures | Select LT1179CN only if cost sensitivity outweighs long-term reliability requirements in non-hermetic assemblies |
| LT1079CN | Higher supply current (50µA/amp), 3× GBW (250kHz), lower voltage noise (0.5µVP-P) - trades micropower for speed and noise performance | Better for 100kHz+ active filters or fast-settling sample-and-hold; less suitable for multi-year battery deployments | Choose LT1079CN when system bandwidth >20kHz or voltage noise <0.6µVP-P is mandatory; avoid if <20µA/amp is required |
Compared with LT1179CN, the LT1179CJ offers superior hermeticity and thermal resistance for harsh environments, while LT1079CN delivers higher bandwidth and lower voltage noise at triple the supply current - making LT1179CJ optimal for ultra-low-power precision, and LT1079CN for speed-critical analog signal chains.
Availability
LT1179CJ is available at Aetrix Electronics and suitable for portable medical sensors, remote environmental monitoring, and satellite telemetry front-ends requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LT1179CJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains full production and support for legacy Linear op amp families including the LT117x series.
The LT1179CJ belongs to Linear's micropower precision op amp product line, designed specifically for battery-operated instrumentation where sub-20µA supply current, rail-to-ground output, and nanoampere-level input bias must coexist with 100µV-level offset accuracy.
FAQ
What is the maximum operating temperature range for the LT1179CJ?
The LT1179CJ is rated for 0°C to 70°C ambient operating temperature. This is defined in the "Operating Temperature Range" table of the official datasheet, where the "C" grade suffix explicitly denotes the commercial temperature range. The J package's hermetic construction ensures stable parametric performance across this full range without derating.
Does the LT1179CJ support true single-supply operation with inputs below ground?
Yes, the LT1179CJ supports inputs down to 0.3V below the negative supply rail (V−). When operated from 5V/0V supplies, this means inputs can go as low as −0.3V - enabling direct connection to transducers like thermocouples or bridge sensors without external level-shifting circuitry. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
What is the typical supply current per amplifier for the LT1179CJ at 5V/0V?
The typical supply current per amplifier for the LT1179CJ is 14–18 µA at 5V/0V and 25°C, with a maximum of 21 µA over temperature. These values are specified in the "ELECTRICAL CHARACTERISTICS" table under "IS Supply Current per Amplifier" for the LT1179C/S grade, and are measured with no load and VO = 1.4V.
Can the LT1179CJ drive a 2kΩ load to ground?
Yes, the LT1179CJ can sink 5mA while maintaining output saturation voltage ≤0.6mV above ground with a 2kΩ load to ground. This is documented in the "Maximum Output Voltage Swing" section under "Output Low, 2k to GND", confirming robust rail-to-ground capability without external components.
Is the LT1179CJ pin-compatible with other LT1179 variants like LT1179CN or LT1179SW?
No, the LT1179CJ is not pin-compatible with LT1179CN or LT1179SW. While all three are quad op amps, the J (ceramic DIP) and N (plastic DIP) packages share identical 14-pin numbering, but the SW (16-pin wide SO) package has a different pinout - including NC pins and relocated V+ and V− - as shown in the "PACKAGE/ORDER INFORMATION" diagrams. Always verify pin mapping per package drawing.
LT1179CJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 85 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 17µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CERDIP
LT1179CJ FAQ
1.How can I place an order for LT1179CJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1179CJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1179CJ reliable?
The price and inventory of LT1179CJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1179CJ is usually 5 days.
3.What payment methods are accepted for LT1179CJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1179CJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1179CJ?
LT1179CJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1179CJ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1179CJ?
For technical support, including LT1179CJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1179CJ requirements.
6.How does Aetrix verify that LT1179CJ is sourced from the original manufacturer or authorized distributors?
All LT1179CJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1179CJ meets industry standards.
7.What is the process for return or replacement of LT1179CJ?
All LT1179CJ units undergo pre-shipment inspection (PSI). If there is an issue with LT1179CJ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1179CJ part is unused and in its original packaging.
Return procedure for LT1179CJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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