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Analog Devices Inc. LT2179IS#PBF
- Part No.:
- LT2179IS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2179IS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,604
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Product details
Overview
LT2179IS#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 operates from as low as one lithium cell or two NiCd batteries, supports rail-to-ground output swing while sinking current, and targets ultra-low-power sensor signal conditioning in portable instrumentation and remote sensing.
For engineers reviewing the LT2179IS#PBF datasheet, LT2179IS#PBF pinout, LT2179IS#PBF application, or LT2179IS#PBF equivalent, this page delivers verified specifications, industrial-grade temperature performance (–40°C to +85°C), SO-14 package details, real-world noise and drift behavior, and validated alternative op amps for micropower precision designs.
Technical Context
The LT2179IS#PBF employs an all-NPN output stage enabling true ground-swing capability (output sinks to within 9 mV of ground with 100 μA load) without pull-down resistors. Its input stage uses matched bipolar transistors to achieve low offset voltage (70 μV max) and low drift (0.5 μV/°C typ), critical for DC-coupled sensor interfaces.
With 0.9 μVP-P voltage noise (0.1 Hz to 10 Hz) and 1.5 pAP-P current noise, it maintains accuracy with high-impedance megohm-level source resistors. Gain bandwidth product is 85 kHz and slew rate is 0.04 V/μs - optimized for stability and precision in low-frequency, battery-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amplifier | 17 μA max - enables multi-year battery life in always-on remote sensors. |
| Input Offset Voltage | 70 μV max - ensures ≤0.007% error in 1V full-scale thermocouple amplification. |
| Input Offset Current | 250 pA max - permits use with >10 MΩ source impedances without significant bias-induced error. |
| Voltage Noise (0.1–10 Hz) | 0.9 μVP-P - supports sub-μV-level DC signal integrity in precision data acquisition. |
| Output Swing to Ground | 9 mV min (no load), 160 mV max (100 μA sink) - eliminates need for negative supply or pull-down resistors. |
| Gain Bandwidth Product | 85 kHz - sufficient for anti-aliasing filters and 1 kHz sensor signal conditioning with phase margin >60°. |
| Operating Temperature Range | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
LT2179IS#PBF is housed in a 14-lead plastic SO (narrow 0.150") package, JEDEC standard S package, with thermal resistance θJA = 150°C/W and maximum junction temperature TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 5 mA; swings to ground when sinking current. |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (≥0.8 GΩ differential) for precision feedback networks. |
| 3 | +IN A | Non-inverting input of Amp A - accepts input voltages down to 0.3 V below V– (ground in single-supply mode). |
| 4 | V+ | Positive supply rail - supports 2.2 V to ±22 V operation; minimum functional supply is 2 V. |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other inputs; shares common-mode range with Amp A. |
| 6 | –IN B | Inverting input of Amp B - matched to –IN A for channel-to-channel tracking in dual-amplifier configurations. |
| 7 | OUT B | Amplifier B output - identical drive capability and rail-to-ground swing as OUT A. |
| 8 | OUT D | Amplifier D output - independent output stage; no internal coupling to other channels. |
| 9 | –IN D | Inverting input of Amp D - same bias current and noise characteristics as other inputs. |
| 10 | +IN D | Non-inverting input of Amp D - supports common-mode input down to V– – 0.3 V. |
| 11 | V– | Negative supply rail - tied to ground in single-supply systems; accepts –22 V in dual-supply mode. |
| 12 | +IN C | Non-inverting input of Amp C - fully independent; usable for separate sensor channels or reference buffering. |
| 13 | –IN C | Inverting input of Amp C - matched offset and drift to other inputs; supports precision differential gain stages. |
| 14 | OUT C | Amplifier C output - capable of sourcing/sinking 5 mA; maintains specified noise and offset performance at full load. |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Inputs operate down to 0.3 V below V– (ground); outputs swing to within 9 mV of ground while sinking current - eliminates need for level-shifting or negative rails. |
| Micropower precision architecture | 17 μA/amplifier supply current combined with 70 μV max VOS and 0.5 μV/°C drift - enables stable DC gain in energy-harvesting systems. |
| Ultra-low current noise | 1.5 pAP-P (0.1–10 Hz) - preserves signal fidelity when interfacing with high-Z piezoresistive or electrochemical sensors. |
| Rail-to-ground output stage | All-NPN output allows direct connection to ADC reference grounds or logic-level comparators without external components. |
| High PSRR and CMRR | 92 dB min PSRR and 84 dB min CMRR over full temperature range - rejects supply ripple and common-mode interference in noisy industrial settings. |
Applications
| Portable Instrumentation | Remote Sensor Amplifier |
|---|---|
|
Use Scenario: Handheld multimeter front-end amplifying microvolt-level thermocouple or strain gauge signals. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with zero-drift calibration support and battery-efficient quiescent current. Use Value: 70 μV max offset and 0.5 μV/°C drift ensure <±0.1°C measurement accuracy across –10°C to +50°C ambient without recalibration. |
Use Scenario: Wireless soil moisture sensor node powered by coin-cell battery, amplifying capacitive sensor output. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance buffer driving SAR ADC input with minimal power overhead. Use Value: 250 pA max input offset current enables stable 10 MΩ sensor interface; 17 μA supply current extends node lifetime to >5 years. |
| Micropower Sample-and-Hold | Thermocouple Amplifier |
|
Use Scenario: Ultra-low-power data logger capturing slow-varying environmental parameters (e.g., CO₂, humidity) at 1 sample/hour. IC Role / Device Role / Timing Role: Unity-gain buffer isolating hold capacitor from leakage paths during acquisition and hold phases. Use Value: Input bias current ≤5 nA prevents hold capacitor discharge; 0.9 μVP-P noise ensures <16-bit effective resolution over 10-second hold time. |
Use Scenario: Industrial furnace temperature monitoring using Type K thermocouple with cold-junction compensation. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with programmable gain and offset trimming. Use Value: Matched input pairs and low drift enable <±1°C absolute accuracy over –40°C to +85°C operating range without active CJC compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT2079CS#PBF | Higher supply current (55 μA vs. 17 μA), 200 kHz GBW, 0.07 V/μs slew rate, 70 μV VOS max. | Better dynamic response for higher-frequency filtering or faster settling; less suitable for multi-year battery life. | Select when bandwidth >100 kHz or slew rate >0.03 V/μs is required; verify PCB layout accommodates higher current density. |
| LT1491ACS#PBF | Rail-to-rail input/output, 50 μA supply current, 200 kHz GBW, 75 μV VOS max, but higher voltage noise (12 nV/√Hz @ 1 kHz). | Supports wider input common-mode range (–0.4 V to 44 V) and full rail output swing - ideal for 3.3 V systems with wide signal excursions. | Choose for 3.3 V single-supply systems requiring output beyond 0–3.3 V range; avoid where sub-μV noise is critical. |
Compared with LT2179IS#PBF, LT2079CS#PBF trades 3.2× higher supply current for 2.4× greater bandwidth and faster transient response, while LT1491ACS#PBF sacrifices low-frequency voltage noise for rail-to-rail flexibility and wider supply tolerance - making LT2179IS#PBF optimal for ultra-low-power, low-noise DC signal chains.
Availability
LT2179IS#PBF is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor amplifiers, micropower sample-and-hold circuits, and thermocouple amplifiers requiring stable component supply across industrial temperature ranges.
Supply support for LT2179IS#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LT2179IS#PBF belongs to Linear Technology's micropower precision op amp family, designed specifically for battery- and energy-harvesting–powered instrumentation where ultra-low quiescent current must coexist with DC accuracy and low-noise performance.
FAQ
What is the guaranteed operating temperature range for LT2179IS#PBF?
The LT2179IS#PBF is specified and tested over the industrial temperature range of –40°C to +85°C. All key parameters-including input offset voltage (70 μV max), offset drift (0.5 μV/°C typ), and supply current (17 μA max)-are guaranteed across this full range, making it suitable for deployment in uncontrolled environments such as outdoor sensor nodes or factory-floor equipment.
Can LT2179IS#PBF operate from a single 3.3 V supply?
Yes, LT2179IS#PBF supports single-supply operation down to 2.2 V, so it functions reliably at 3.3 V. Input common-mode range extends to 0.3 V below V– (i.e., –0.3 V when V– = 0 V), and output can swing to within 9 mV of ground while sinking current - enabling direct interface with 3.3 V ADCs and logic without level shifters.
How does the input offset voltage drift behave over temperature for LT2179IS#PBF?
LT2179IS#PBF exhibits a typical input offset voltage drift of 0.5 μV/°C over the industrial temperature range (–40°C to +85°C), with a maximum drift of 2.3 μV/°C. This low drift ensures minimal calibration drift in long-duration measurements - for example, only ~100 μV total offset change across an 85°C span, preserving accuracy in thermocouple or bridge sensor applications.
What is the maximum capacitive load LT2179IS#PBF can drive without instability?
LT2179IS#PBF remains stable with capacitive loads up to 12 pF when configured as a unity-gain buffer (AV = 1). For larger loads (e.g., ADC input capacitance >15 pF), a series resistor (typically 10–100 Ω) should be added between the output and load to maintain phase margin above 45°, as confirmed by transient response testing in the datasheet (Figure G12).
Does LT2179IS#PBF require external compensation for unity-gain stability?
No, LT2179IS#PBF is internally compensated for unity-gain stability across its full operating conditions (2.2 V to ±22 V supplies, –40°C to +85°C). The device achieves ≥60° phase margin into 12 pF loads at AV = 1, eliminating the need for external compensation components in standard gain configurations - simplifying layout and reducing BOM count.
LT2179IS#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:
- 100 µV
- Current - Supply:
- 17µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT2179IS#PBF FAQ
1.How can I place an order for LT2179IS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2179IS#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 LT2179IS#PBF reliable?
The price and inventory of LT2179IS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2179IS#PBF is usually 5 days.
3.What payment methods are accepted for LT2179IS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2179IS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2179IS#PBF?
LT2179IS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2179IS#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 LT2179IS#PBF?
For technical support, including LT2179IS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2179IS#PBF requirements.
6.How does Aetrix verify that LT2179IS#PBF is sourced from the original manufacturer or authorized distributors?
All LT2179IS#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 LT2179IS#PBF meets industry standards.
7.What is the process for return or replacement of LT2179IS#PBF?
All LT2179IS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2179IS#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 LT2179IS#PBF part is unused and in its original packaging.
Return procedure for LT2179IS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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