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Analog Devices Inc. LT2179ACS#PBF
- Part No.:
- LT2179ACS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2179ACS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
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Product details
Overview
LT2179ACS#PBF 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#PBF datasheet, LT2179ACS#PBF pinout, LT2179ACS#PBF application, or LT2179ACS#PBF equivalent, key selection criteria include ultra-low quiescent current, sub-1μV/°C offset drift, picoampere-level input bias, 0.9μVP-P voltage noise (0.1Hz–10Hz), and guaranteed operation down to 2.2V supply - critical for portable medical devices, remote sensor nodes, and satellite telemetry front-ends.
Technical Context
The LT2179ACS#PBF employs an all-NPN output stage enabling true ground-swing capability (output low ≤ 9mV at no load, ≤ 160mV at 100μA sink) without external pull-downs. Its input stage uses matched bipolar transistors to achieve low offset voltage (70μV max) and low drift (0.5μV/°C typ), supported by 93dB CMRR and 94dB PSRR at 5V supply.
Designed for micropower signal conditioning, it features 85kHz gain-bandwidth product and 0.04V/μs slew rate - sufficient for DC-coupled thermocouple amplification, micropower filters, and sample-and-hold circuits where bandwidth is secondary to precision and power efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 17μA max - enables >1-year battery life in coin-cell–powered sensor nodes |
| Input Offset Voltage | 70μV max - supports 16-bit+ accuracy in 5V full-scale systems without trimming |
| Input Offset Current | 250pA max - permits use of >10MΩ source impedances with <1μV error contribution |
| Voltage Noise | 0.9μVP-P (0.1Hz–10Hz) - suitable for low-frequency precision amplification (e.g., thermocouples) |
| Gain Bandwidth Product | 85kHz - adequate for anti-aliasing filters and DC–10kHz sensor signal chains |
| Output Swing Low | ≤9mV above ground (no load) - eliminates need for level-shifting in single-supply ADC interfaces |
| Common-Mode Range | Includes ground (0V) - allows direct amplification of signals referenced to system ground |
Pinout & Package
LT2179ACS#PBF is housed in a 14-lead plastic SO (narrow 0.150") package, JEDEC MS-012 compliant, with standard quad op amp pinout and 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 - matches –IN A for low offset |
| 4 | V+ | Positive supply rail - operates from 2.2V to ±22V |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other amps |
| 6 | –IN B | Inverting input of Amp B - independent bias path |
| 7 | OUT B | Amplifier B output - identical performance to OUT A |
| 8 | OUT D | Amplifier D output - fully independent channel |
| 9 | –IN D | Inverting input of Amp D - matched to +IN D for precision |
| 10 | +IN D | Non-inverting input of Amp D - supports differential sensing |
| 11 | V– | Negative supply rail - accepts ground or negative voltage |
| 12 | +IN C | Non-inverting input of Amp C - decoupled from adjacent channels |
| 13 | –IN C | Inverting input of Amp C - low crosstalk (<−110dB) |
| 14 | OUT C | Amplifier C output - same drive strength and noise as other outputs |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 17μA per amplifier enables multi-channel sensing on microampere budgets |
| Ground-swing output stage | All-NPN architecture sinks current to within 9mV of ground - no pull-down resistors needed |
| Precision DC performance | 70μV max VOS, 0.5μV/°C drift, and 93dB CMRR ensure stable gain over temperature and supply variation |
| Low-noise input | 0.9μVP-P (0.1Hz–10Hz) and 1.5pAP-P noise preserve SNR in high-impedance sensor interfaces |
| Single-supply flexibility | Operates from 2.2V to 5V - compatible with Li-ion, 2×NiCd, or regulated 3.3V rails |
Applications
| Portable Instrumentation | Remote Sensor Amplifier |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level thermocouple or strain gauge signals. IC Role / Device Role / Timing Role: Precision DC amplifier with rail-to-ground output driving 16-bit SAR ADC reference buffer. Use Value: 70μV offset and 0.5μV/°C drift maintain calibration stability across 0°C–50°C operating range without recalibration. |
Use Scenario: Wireless soil moisture sensor node powered by solar cell + supercapacitor. IC Role / Device Role / Timing Role: Micropower signal conditioner for resistive humidity sensor, interfacing to ultra-low-power MCU ADC. Use Value: 17μA per amplifier extends supercapacitor hold-up time to >72 hours between solar charges. |
| Thermocouple Amplifier | Micropower Sample-and-Hold |
Use Scenario: Cold-junction compensation and amplification in industrial temperature monitoring module. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier stage preceding cold-junction thermistor circuit. Use Value: 0.9μVP-P noise and 250pA offset current prevent degradation of <1°C resolution at 1000°C. |
Use Scenario: Low-power data acquisition system capturing slow-varying environmental parameters. IC Role / Device Role / Timing Role: Unity-gain buffer isolating S/H capacitor from high-impedance sensor source during hold phase. Use Value: 5nA max input bias current limits hold-step error to <1LSB in 12-bit 10nF S/H design over 100ms hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad micropower precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT2079CS#PBF | 55μA supply current per amp (3.2× higher), 70μV VOS max, 200kHz GBW | Better bandwidth and drive but 3× higher power - suited for faster settling or higher-load apps | Select when >100kHz signal bandwidth or >10mA output drive is required; avoid if battery life is primary constraint |
| LT1491ACS#PBF | Rail-to-rail input/output, 50μA supply current, 200kHz GBW, 1.2mV VOS max | Wider input common-mode (–0.4V to 44V) but higher offset and noise - better for wide-VIN apps | Choose for systems requiring input below ground or above VCC; not recommended for sub-100μV DC accuracy needs |
Compared with LT2179ACS#PBF, LT2079CS#PBF trades 3× higher supply current for 2.4× higher bandwidth and stronger output drive, while LT1491ACS#PBF sacrifices DC precision for rail-to-rail I/O flexibility and wider supply tolerance - making LT2179ACS#PBF optimal for ultra-low-power, high-DC-accuracy applications where bandwidth is ≤100kHz.
Availability
LT2179ACS#PBF is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor amplifiers, and thermocouple conditioning systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for medical and aerospace-qualified designs.
Supply support for LT2179ACS#PBF 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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs, serving industrial, automotive, communications, and healthcare markets.
The LT2179ACS#PBF belongs to Linear Technology's legacy micropower precision op amp family, engineered specifically for battery- and energy-harvesting–powered systems demanding nanoscale quiescent current without sacrificing DC accuracy or noise performance.
FAQ
What is the maximum supply voltage for LT2179ACS#PBF?
The LT2179ACS#PBF has an absolute maximum supply voltage rating of ±22V. When operated with dual supplies, the total differential voltage across V+ and V– must not exceed 44V. For single-supply use, V– is typically grounded and V+ may range from 2.2V to 22V - though specified performance is guaranteed only from 2.2V to 12V per the datasheet electrical characteristics tables. Exceeding these limits risks permanent damage.
Does LT2179ACS#PBF support true single-supply operation with input signals at ground?
Yes, the LT2179ACS#PBF supports true single-supply operation with its input common-mode voltage range extending to 0V (ground). The datasheet explicitly states "Input Voltage Range Includes Ground" and specifies VCM = 0V under 5V/0V supply conditions. This allows direct amplification of ground-referenced sensors like thermocouples or bridge outputs without level-shifting circuitry - a key enabler for simplified, low-component-count front-ends.
What is the typical output voltage swing near ground for LT2179ACS#PBF?
Under no-load conditions with 5V/0V supply, the LT2179ACS#PBF output swings to within 6.5mV of ground (typical) and 9mV maximum when sinking current. At 100μA sink load, the low-level output is 120mV typical / 160mV max. This ground-swing capability stems from its all-NPN output stage and eliminates the need for external pull-down resistors - reducing power loss and board space in battery-sensitive designs.
Can LT2179ACS#PBF be used in rail-to-rail input applications?
No, the LT2179ACS#PBF does not provide rail-to-rail input operation. Its input common-mode range extends to ground but stops 1.5V below the positive rail (e.g., up to 3.5V on a 5V supply). It is not designed for inputs near V+, unlike rail-to-rail input op amps such as the LT1491. Attempting to drive inputs close to V+ may cause phase reversal or increased distortion. For rail-to-rail input capability, consider alternatives like LT1491ACS#PBF or LTC2050.
What is the guaranteed operating temperature range for LT2179ACS#PBF?
The LT2179ACS#PBF is rated for the commercial temperature range of 0°C to +70°C. This is indicated by the "C" suffix in the part number and confirmed in the Order Information table, which lists LT2179ACS#PBF with "0°C to 70°C" under Temperature Range. Industrial-grade variants (e.g., LT2179IS#PBF) extend to –40°C to +85°C, but the ACS version is not characterized or guaranteed beyond 70°C ambient.
LT2179ACS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LT2179ACS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2179ACS#PBF 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#PBF reliable?
The price and inventory of LT2179ACS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2179ACS#PBF is usually 5 days.
3.What payment methods are accepted for LT2179ACS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2179ACS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2179ACS#PBF?
LT2179ACS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2179ACS#PBF 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#PBF?
For technical support, including LT2179ACS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2179ACS#PBF requirements.
6.How does Aetrix verify that LT2179ACS#PBF is sourced from the original manufacturer or authorized distributors?
All LT2179ACS#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LT2179ACS#PBF?
All LT2179ACS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2179ACS#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LT2179ACS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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