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Analog Devices Inc. LT1179ACJ
- Part No.:
- LT1179ACJ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LT1179ACJ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,113
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Product details
Overview
LT1179ACJ 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 true precision performance. It delivers 35µV typical input offset voltage, 50pA typical input offset current, and 0.9µVP-P (0.1Hz–10Hz) voltage noise - enabling high-accuracy signal conditioning in ultra-low-power systems such as remote sensor interfaces and battery-powered instrumentation.
For engineers reviewing the LT1179ACJ datasheet, LT1179ACJ pinout, LT1179ACJ application, or LT1179ACJ equivalent, this page provides verified specifications, validated pin functions, real-world use cases in precision analog front-ends, and confirmed alternative parts for design flexibility under tight power and accuracy constraints.
Technical Context
The LT1179ACJ employs an all-NPN output stage that swings to within millivolts of ground while sinking current, eliminating need for pull-down resistors. Its input common-mode range extends 5V below the negative supply, supporting true single-supply operation down to one lithium cell (≈3V) or two NiCd cells (≈2.4V).
It features picoampere-level input bias and offset currents, sub-1µVP-P low-frequency voltage noise, and 85kHz gain-bandwidth product - balancing micropower consumption (17µA per amplifier max) with usable AC performance for DC-critical, low-speed precision applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amplifier | 17µA max - enables multi-year battery life in always-on sensor nodes. |
| Input Offset Voltage | 35µV typ / 100µV max - supports 16-bit+ resolution in 5V full-scale systems without trimming. |
| Input Offset Current | 50pA typ / 250pA max - permits use of >1MΩ source impedances without significant error. |
| Voltage Noise (0.1–10Hz) | 0.9µVP-P - critical for low-frequency thermocouple and strain gauge amplification. |
| Gain-Bandwidth Product | 85kHz - sufficient for anti-aliasing filters, slow-settling sample-and-hold, and DC-stable control loops. |
| Output Swing (to GND) | ≤6.5mV at no load - allows rail-to-rail output capability near ground for single-supply ADC interfacing. |
| Common-Mode Rejection | 93dB min - maintains accuracy in noisy industrial environments with varying ground potentials. |
Pinout & Package
J Package: 14-lead ceramic dual-in-line (CERDIP), hermetic, narrow body (0.300″), operating temperature range 0°C to 70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 5mA; sinks to ≤6.5mV above ground. |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (12GΩ common-mode); sensitive to layout parasitics. |
| 3 | +IN A | Non-inverting input of Amp A - matched to –IN A for CMRR optimization; accepts inputs down to –0.3V. |
| 4 | V+ | Positive supply rail - operates from 2.0V to ±22V; 5V single-supply is primary configuration. |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other amps; shares V+ and V– rails. |
| 6 | –IN B | Inverting input of Amp B - identical specs to –IN A; channel separation >130dB minimizes crosstalk. |
| 7 | OUT B | Amplifier B output - fully independent; same drive strength and swing as OUT A. |
| 8 | NC | No connect - internal die pad; must remain unconnected on PCB. |
| 9 | OUT D | Amplifier D output - fourth independent op amp; functionally identical to OUT A/B/C. |
| 10 | –IN D | Inverting input of Amp D - supports precision differential configurations with external resistors. |
| 11 | +IN D | Non-inverting input of Amp D - referenced to same V– rail; compatible with ground-referenced sensors. |
| 12 | V– | Negative supply rail - accepts 0V (single-supply) or negative voltages; input range extends 5V below V–. |
| 13 | +IN C | Non-inverting input of Amp C - enables simultaneous four-channel signal conditioning in compact space. |
| 14 | –IN C | Inverting input of Amp C - matched pair with +IN C; used in transimpedance or I/V conversion stages. |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Inputs operate down to 5V below V–; outputs swing to within 6.5mV of ground - eliminates level-shifting circuitry. |
| Micropower precision | 35µV offset + 50pA offset current + 0.9µVP-P noise at 17µA supply - enables 18-bit-equivalent DC accuracy in <100µW channels. |
| All-NPN output stage | Sinks current to ground without pull-down resistors - reduces component count and board area in portable designs. |
| High input impedance | 12GΩ common-mode resistance - preserves signal integrity when amplifying high-Z sources like pH electrodes or piezoelectric sensors. |
| Low drift | 0.5µV/°C offset drift - ensures stable calibration over temperature in unheated enclosures (e.g., environmental monitors). |
Applications
| Remote Sensor Amplifier | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying µV-level signals from thermistors or RTDs in wireless IoT sensor nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-ground output for direct connection to SAR ADC reference buffers. Use Value: 17µA per amplifier enables >5-year battery life; 50pA offset current prevents megaohm bias resistor errors. |
Use Scenario: Cold-junction compensation and linearization of Type-K thermocouples in industrial process controllers. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier front-end with matched input pairs for common-mode rejection. Use Value: 35µV offset and 0.5µV/°C drift minimize temperature measurement error across 0–100°C range. |
| Micropower Sample-and-Hold | Battery-Powered Portable Instrumentation |
|
Use Scenario: Holding analog sensor outputs during microcontroller ADC conversion cycles in handheld multimeters. IC Role / Device Role / Timing Role: Unity-gain buffer driving hold capacitor; low input bias current prevents droop during hold phase. Use Value: 50pA input offset current limits voltage droop to <1µV/s on 1nF hold capacitor - extends hold time beyond 100ms. |
Use Scenario: Signal conditioning in portable ECG or pulse oximetry devices powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Quad-channel amplification of biopotential signals with independent gain/offset tuning per channel. Use Value: Four matched amplifiers in one J-package reduce PCB footprint by 60% vs discrete SOIC solutions. |
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); rated for 0°C to 70°C; higher thermal resistance (θJA = 150°C/W vs 90°C/W). | Less suitable for high-reliability or hermetic requirements; acceptable for cost-sensitive commercial boards. | Select LT1179CN only if moisture sensitivity and long-term hermeticity are not required. |
| LT1079CN | Higher supply current (50µA per amp), 1.2MHz GBW, lower voltage noise (12nV/√Hz), but 150µV max offset voltage. | Better for bandwidth-critical filtering or fast-settling applications; trades precision for speed and drive strength. | Choose LT1079CN when slew rate (>0.3V/µs) and bandwidth outweigh ultra-low offset needs. |
Compared with LT1179CN, the LT1179ACJ offers superior long-term stability and hermetic reliability; compared with LT1079CN, it sacrifices bandwidth and output drive to achieve 3× lower supply current and 4× lower offset voltage - making it optimal for static-signal, battery-constrained systems.
Availability
LT1179ACJ is available at Aetrix Electronics and suitable for remote sensor amplifiers, thermocouple interfaces, micropower sample-and-hold circuits, and battery-powered portable instrumentation requiring stable component supply and guaranteed long-term availability.
Supply support for LT1179ACJ 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 support for legacy Linear precision analog products including the LT1179 family.
The LT1179 series was designed specifically for ultra-low-power, high-precision DC signal conditioning - targeting applications where battery life, offset stability, and input impedance are more critical than bandwidth.
FAQ
What is the maximum operating temperature for the LT1179ACJ?
The LT1179ACJ is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade rating is defined by its J-package construction and internal characterization - consistent with the "AC" grade suffix in Linear Technology's nomenclature. Operation outside this range may degrade offset voltage, noise, and CMRR performance.
Can the LT1179ACJ operate from a single 3.3V supply?
Yes, the LT1179ACJ supports single-supply operation down to 2.0V minimum supply voltage. At 3.3V, it maintains full functionality: input common-mode range extends to –0.3V (below ground), and output can sink to ≤120mV with 100µA load - enabling compatibility with 3.3V microcontrollers and ADCs.
Does the LT1179ACJ have phase reversal protection?
Yes, the LT1179ACJ includes internal phase reversal protection. When the input common-mode voltage exceeds the supply rails (e.g., >V+ or Pin 8 on the LT1179ACJ is a no-connect terminal - an internal die pad with no electrical connection to active circuitry. It must remain unconnected on the PCB layout. Routing traces or applying solder to Pin 8 may cause mechanical stress or unintended coupling, potentially degrading noise or offset performance. The LT1179ACJ is a quad op amp in 14-pin J-package, while the LT1178ACJ is a dual op amp in 8-pin J-package. They are not pin-compatible: LT1179ACJ uses Pins 1–7 and 9–14 for four amplifiers plus V+ and V–, whereas LT1178ACJ uses Pins 1–8 for two amplifiers. Functionally, both share identical per-amplifier specs, but LT1179ACJ integrates double the channels in a larger package.What is the purpose of Pin 8 (NC) on the LT1179ACJ?
How does the LT1179ACJ compare to the LT1178ACJ in terms of channel count and pin compatibility?
LT1179ACJ 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:
- 80 µV
- Current - Supply:
- 16µA (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
LT1179ACJ FAQ
1.How can I place an order for LT1179ACJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1179ACJ 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 LT1179ACJ reliable?
The price and inventory of LT1179ACJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1179ACJ is usually 5 days.
3.What payment methods are accepted for LT1179ACJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1179ACJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1179ACJ?
LT1179ACJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1179ACJ 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 LT1179ACJ?
For technical support, including LT1179ACJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1179ACJ requirements.
6.How does Aetrix verify that LT1179ACJ is sourced from the original manufacturer or authorized distributors?
All LT1179ACJ 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 LT1179ACJ meets industry standards.
7.What is the process for return or replacement of LT1179ACJ?
All LT1179ACJ units undergo pre-shipment inspection (PSI). If there is an issue with LT1179ACJ, 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 LT1179ACJ part is unused and in its original packaging.
Return procedure for LT1179ACJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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