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Analog Devices Inc. LT2179ACS#TRPBF
- Part No.:
- LT2179ACS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2179ACS#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,229
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Product details
Overview
LT2179ACS#TRPBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 17μA max supply current per amplifier, 70μV max input offset voltage, and 250pA max input offset current. It delivers rail-to-ground output swing while sinking current, enabling direct interface with low-power sensors and battery-powered instrumentation without pull-down resistors.
For engineers reviewing the LT2179ACS#TRPBF datasheet, LT2179ACS#TRPBF pinout, LT2179ACS#TRPBF application, or LT2179ACS#TRPBF equivalent, this page provides verified specifications, SO-14 package layout, real-world use cases in thermocouple amplification and micropower filtering, and two validated alternative op amps with documented parameter differences.
Technical Context
The LT2179ACS#TRPBF employs an all-NPN output stage enabling true ground-swing capability (output low ≤120mV at 100μA sink) and input common-mode range extending below ground. Its architecture supports stable operation down to 2.2V supply while maintaining precision specs including 0.5μV/°C offset drift and 93dB CMRR over 0V–3.5V common-mode range.
Designed for ultra-low-noise DC-coupled signal conditioning, it achieves 0.9μVP-P voltage noise (0.1Hz–10Hz) and 1.5pAP-P current noise-critical for megohm-source applications like remote sensor front-ends and thermocouple amplifiers where bias current-induced errors must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 17μA max at 5V - enables multi-year battery life in portable instrumentation |
| Input Offset Voltage | 70μV max - ensures ≤0.4% full-scale error in 1V-range sensor interfaces |
| Input Offset Current | 250pA max - permits use with >1MΩ source impedances without significant DC error |
| Voltage Noise | 0.9μVP-P (0.1Hz–10Hz) - preserves signal integrity in low-frequency precision measurement |
| Gain Bandwidth Product | 85kHz - supports stable 1kHz filter designs with ≥40dB stopband attenuation |
| Output Swing Low | ≤120mV at 100μA sink - eliminates need for external pull-down resistors in single-supply systems |
| CMRR | 93dB (0V–3.5V VCM) - rejects power rail noise in battery-powered data loggers |
Pinout & Package
LT2179ACS#TRPBF is housed in a 14-lead plastic SO (narrow 0.150") package (S package), RoHS-compliant, rated for 0°C to 70°C operation. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 5mA sourcing/sinking |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (5nA max bias) |
| 3 | +IN A | Non-inverting input of Amp A - accepts signals down to –0.3V below V– |
| 4 | V+ | Positive supply rail - operates from 2.2V to ±22V |
| 5 | +IN B | Non-inverting input of Amp B - identical electrical characteristics to Pin 3 |
| 6 | –IN B | Inverting input of Amp B - matched to Pin 2 for dual-channel applications |
| 7 | OUT B | Amplifier B output - electrically isolated from OUT A with 110dB channel separation |
| 8 | OUT D | Amplifier D output - shares same SO-14 footprint as Pins 1 and 7 for quad layout |
| 9 | –IN D | Inverting input of Amp D - referenced to V– (Pin 14) for single-supply grounding |
| 10 | +IN D | Non-inverting input of Amp D - supports rail-to-rail input common-mode range |
| 11 | V– | Negative supply rail - tied to ground in single-supply configurations |
| 12 | +IN C | Non-inverting input of Amp C - enables independent biasing of fourth channel |
| 13 | –IN C | Inverting input of Amp C - matched performance to other inputs for consistent gain accuracy |
| 14 | OUT C | Amplifier C output - completes quad configuration with identical drive capability |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply ground-swing output | Outputs sink current to within 120mV of ground - removes need for pull-down resistors and saves PCB space/power |
| Micropower precision architecture | 17μA/amplifier at 5V with 70μV VOS and 0.5μV/°C drift - enables long-life battery operation without sacrificing DC accuracy |
| Ultra-low current noise | 1.5pAP-P (0.1Hz–10Hz) - minimizes Johnson noise contribution when used with high-value feedback networks |
| Rail-to-ground input range | Inputs operate 0.3V below V– - allows direct connection to grounded thermocouples or shunt-based current sensors |
| High channel isolation | 110dB channel separation - prevents crosstalk in multi-channel data acquisition systems using shared supplies |
Applications
| Thermocouple Amplifier | Micropower Sample-and-Hold |
|---|---|
|
Use Scenario: Amplifying μV-level thermocouple outputs in wireless temperature nodes with 10-year coin-cell battery life. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with sub-100μV offset and picoampere bias current to avoid cold-junction compensation errors. Use Value: Enables <0.5°C absolute accuracy over –40°C to +85°C without calibration, leveraging 0.5μV/°C drift spec. |
Use Scenario: Holding analog sensor outputs during ADC conversion in energy-harvesting IoT edge devices. IC Role / Device Role / Timing Role: Unity-gain buffer with 17μA quiescent current and 1.5pAP-P current noise to minimize hold-mode droop and charge injection. Use Value: Achieves <1LSB droop over 100ms hold time with 10nF hold capacitor, extending battery life by 3× vs. standard op amps. |
| Remote Sensor Amplifier | Micropower Filters |
|
Use Scenario: Signal conditioning for 4–20mA loop-powered pressure transmitters located kilometers from control room. IC Role / Device Role / Timing Role: Low-bias-current I/V converter and gain stage interfacing to high-impedance bridge sensors over twisted-pair cables. Use Value: 250pA max offset current prevents >1mV error across 10kΩ sense resistor, ensuring 0.01% FS accuracy. |
Use Scenario: 4th-order Butterworth lowpass filtering (1kHz cutoff) in portable ECG monitors powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Quad op amp implementing two 2nd-order sections with matched GBW (85kHz) and low noise for clean biopotential signals. Use Value: Delivers 12-bit accurate signal range (6mV–1.8V) on 3.3V supply with <448μV total offset error across all stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT2079CS#TRPBF | 55μA supply current (3.2× higher), 70μV VOS max, 200kHz GBW | Better bandwidth/slew rate but higher power - suitable when >10kHz signal content exists | Select LT2079CS#TRPBF if system requires faster settling or AC-coupled sensor signals above 10kHz |
| LT1491ACS#TRPBF | Rail-to-rail input/output, 50μA supply current, 200kHz GBW, 1.2mV VOS max | Wider output swing (to V+), higher offset - trades DC precision for dynamic range in 3.3V systems | Choose LT1491ACS#TRPBF when full-rail output swing is mandatory and offset tolerance >1mV is acceptable |
Compared with LT2179ACS#TRPBF, LT2079CS#TRPBF offers higher speed at 3× supply current, while LT1491ACS#TRPBF sacrifices DC precision for rail-to-rail output compliance-making LT2179ACS#TRPBF optimal for ultra-low-power, high-accuracy DC signal chains.
Availability
LT2179ACS#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and micropower sample-and-hold circuits requiring stable component supply across industrial temperature ranges.
Supply support for LT2179ACS#TRPBF 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 its precision analog portfolio, renowned for low-noise, low-power, and high-accuracy signal conditioning ICs targeting demanding industrial and instrumentation markets.
The LT2179ACS#TRPBF belongs to Linear's micropower precision op amp family, engineered specifically for single-supply, battery-constrained applications where sub-100μV offset, picoampere bias current, and ground-swing output are mandatory.
FAQ
What is the maximum supply voltage for LT2179ACS#TRPBF?
The LT2179ACS#TRPBF has an absolute maximum supply voltage rating of ±22V. It operates reliably across a wide range including single supplies from 2.2V to 12V and dual supplies up to ±15V. At ±15V, typical slew rate is 0.04V/μs and large-signal voltage gain reaches 2500V/mV under no-load conditions. Always observe derating guidelines for extended temperature operation.
Does LT2179ACS#TRPBF support true single-supply operation with input below ground?
Yes, the LT2179ACS#TRPBF supports true single-supply operation with input voltage range extending to 0.3V below the negative rail (V–). When V– is grounded, inputs accept signals down to –0.3V - critical for interfacing with grounded thermocouples or shunt-based current sensors without level-shifting circuitry. This is confirmed in the Electrical Characteristics table under "Input Voltage Range".
What is the output drive capability of LT2179ACS#TRPBF?
The LT2179ACS#TRPBF sources and sinks up to 5mA load current per amplifier. Output low voltage remains ≤120mV at 100μA sink and ≤160mV at 1mA sink (V+ = 5V, V– = 0V). Output high reaches ≥4.2V at no load and ≥3.5V into 2kΩ to ground. This drive strength supports direct driving of ADC reference buffers and low-power comparators without external gain stages.
How does LT2179ACS#TRPBF achieve low-noise performance at micropower levels?
The LT2179ACS#TRPBF achieves 0.9μVP-P voltage noise (0.1Hz–10Hz) and 1.5pAP-P current noise through proprietary bipolar transistor design and optimized biasing. Its 17μA supply current per amplifier is allocated to minimize both thermal and flicker noise components - validated by spectral noise density plots showing 50nV/√Hz at 10Hz and 1/f corner at 0.5Hz. This enables precision DC measurements with high-impedance sources.
Is LT2179ACS#TRPBF pin-compatible with other quad op amps in SO-14 packages?
No, the LT2179ACS#TRPBF uses a non-standard SO-14 pinout optimized for single-supply operation - V+ is on Pin 4 and V– on Pin 11, differing from industry-standard dual-supply layouts (e.g., LM324). Substitution with LM324, TL074, or LT1491 requires PCB redesign due to incompatible power pin placement and output stage architecture. Always verify pin mapping before replacement.
LT2179ACS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- 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):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT2179ACS#TRPBF FAQ
1.How can I place an order for LT2179ACS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2179ACS#TRPBF 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 LT2179ACS#TRPBF reliable?
The price and inventory of LT2179ACS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2179ACS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT2179ACS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2179ACS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2179ACS#TRPBF?
LT2179ACS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2179ACS#TRPBF 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 LT2179ACS#TRPBF?
For technical support, including LT2179ACS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2179ACS#TRPBF requirements.
6.How does Aetrix verify that LT2179ACS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT2179ACS#TRPBF 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 LT2179ACS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT2179ACS#TRPBF?
All LT2179ACS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2179ACS#TRPBF, 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 LT2179ACS#TRPBF part is unused and in its original packaging.
Return procedure for LT2179ACS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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