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Analog Devices Inc. LT2079AIS#TRPBF
- Part No.:
- LT2079AIS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2079AIS#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,588
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Product details
Overview
LT2079AIS#TRPBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 70µV max input offset voltage, 50µA max supply current per amplifier, and rail-to-rail output swing to ground while sinking current - enabling true micropower instrumentation amplifiers and sensor front-ends in battery-powered systems.
For engineers reviewing the LT2079AIS#TRPBF datasheet, LT2079AIS#TRPBF pinout, LT2079AIS#TRPBF application, or LT2079AIS#TRPBF equivalent, this page delivers verified specifications, industrial-grade temperature performance (–40°C to 85°C), SO-14 package details, and real-world design value for low-noise, low-drift, single-supply signal conditioning.
Technical Context
The LT2079AIS#TRPBF implements an all-NPN output stage with internal offset trimming at 5V/0V supplies, enabling sub-millivolt output saturation when sinking current - eliminating external pull-down resistors. Its input stage includes series protection resistors that prevent phase reversal and substrate latch-up even with inputs as low as –1V relative to V–.
It achieves 200kHz gain-bandwidth product and 0.07V/µs slew rate while maintaining 0.6µVP-P (0.1Hz–10Hz) voltage noise and 2.3pAP-P current noise - a deliberate trade-off balancing micropower consumption against precision, speed, and drive capability not found in legacy micropower op amps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 43–60 µA (enables multi-channel sensing on coin-cell or Li-ion batteries) |
| Input Offset Voltage | 70 µV max (guaranteed over full –40°C to 85°C range; enables <10ppm accuracy in 100× gain stages) |
| Offset Voltage Drift | 0.4 µV/°C typ (ensures <1.2 µV drift across 30°C ambient variation) |
| Gain Bandwidth Product | 200 kHz (supports stable closed-loop gain up to ~200 at unity-gain bandwidth limit) |
| Output Swing (Low) | ≤125 mV above ground at 100 µA sink (no pull-down resistor needed; saves power & board space) |
| Input Voltage Range | Extends 0.3 V below V– (–0.3 V at 0V supply), enabling true ground-referenced sensor interfacing) |
| Common Mode Rejection | 90–106 dB (minimizes error from common-mode shifts in thermocouple or bridge amplifiers) |
Pinout & Package
LT2079AIS#TRPBF is housed in a 14-lead plastic SO (S package), standard surface-mount outline with 1.27 mm pitch. Pin numbering follows JEDEC MS-012, top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; capable of sourcing/sinking ±5 mA into 2 kΩ load |
| 2 | –IN A | Inverting input for Amp A; high-impedance (≥300 MΩ differential) |
| 3 | +IN A | Non-inverting input for Amp A; protected to –1V below V– |
| 4 | V+ | Positive supply rail; bypassing with 0.1 µF improves settling time |
| 5 | +IN B | Non-inverting input for Amp B; matched to +IN A for dual-channel applications |
| 6 | –IN B | Inverting input for Amp B; supports precise difference amplifier configurations |
| 7 | OUT B | Amplifier B output; identical drive and swing specs to OUT A |
| 8 | OUT D | Amplifier D output; fully independent channel with same electrical specs |
| 9 | –IN D | Inverting input for Amp D; usable in multi-stage filter or dead-zone circuits |
| 10 | +IN D | Non-inverting input for Amp D; supports bias-cancellation topologies |
| 11 | V– | Negative supply rail (0V for single supply); serves as reference for all inputs/outputs |
| 12 | +IN C | Non-inverting input for Amp C; enables 4-channel parallel processing |
| 13 | –IN C | Inverting input for Amp C; used in programmable-gain or absolute-value circuits |
| 14 | OUT C | Amplifier C output; supports independent feedback paths without crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| All-NPN output stage | Swings within 125 mV of ground while sinking 100 µA - eliminates need for power-wasting pull-down resistors |
| Internal offset trimming at 5V/0V | Minimizes VOS drift under battery-voltage conditions; PSRR = 114 dB limits VOS shift to ≤8 µV at 9V supply |
| Input phase reversal protection | Prevents output lockup during transients; maintains correct polarity even with –1V input (vs. 0.4V limit in LM158/OP-290) |
| Picoampere-level input bias | 6–10 nA max (typ 7 nA) enables use of >1 MΩ source impedances without gain error or thermal drift degradation |
| Matched quad architecture | Channel-to-channel VOS match ≤150 µV (98% yield); supports precision instrumentation amp topologies with minimal calibration |
Applications
| Remote Sensor Amplifier | Thermocouple Amplifier |
|---|---|
Use Scenario: Amplifying µV-level signals from RTDs or piezoresistive sensors in wireless IoT nodes powered by CR2032 batteries. IC Role / Device Role / Timing Role: Quad amplifier configured as two differential pairs driving ADC inputs; one pair handles sensor excitation and feedback, the other performs ratiometric correction. Use Value: 50 µA per amplifier enables >5-year battery life; 70 µV VOS ensures <0.1°C error in Type-K thermocouple measurement without software calibration. | Use Scenario: Cold-junction compensation and linearization of K-type thermocouples in industrial process controllers. IC Role / Device Role / Timing Role: Precision difference amplifier with matched gain-setting resistors; one LT2079AIS#TRPBF channel buffers the thermocouple, another conditions the cold-junction sensor. Use Value: 0.4 µV/°C drift and 90+ dB CMRR suppress ambient-induced errors; output swing to ground allows direct interface to 0–2.5V SAR ADCs. |
| Micropower Sample-and-Hold | Single-Battery Instrumentation Amplifier |
Use Scenario: Low-power data acquisition in portable medical devices where sampling occurs intermittently to conserve energy. IC Role / Device Role / Timing Role: One amplifier acts as unity-gain buffer for hold capacitor; second provides reset control; third and fourth implement precision comparator and discharge logic. Use Value: Sub-100 µA quiescent current per stage extends hold time between refresh cycles; 0.6 µVP-P noise preserves resolution in 16-bit systems. | Use Scenario: High-common-mode rejection front-end for ECG or EEG analog signal chains operating from a single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Three amplifiers form a 3-op-amp IA topology; fourth provides reference bias or active filtering. Use Value: Rail-to-ground output swing enables full dynamic range utilization of 3.3V ADCs; 2.3 pAP-P current noise prevents electrode interface degradation. |
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 | Commercial grade (0°C to 70°C); 50 µV max VOS at 25°C only; no guaranteed drift spec over full range | Suitable for consumer electronics or lab equipment with controlled ambient; not rated for automotive or industrial environments | Select when cost sensitivity outweighs extended temperature reliability requirements |
| OPA2333AIDR | Zero-drift chopper architecture; 0.02 µV/°C drift; higher 350 kHz GBW but 17 µA higher IQ per amp (67 µA vs 50 µA) | Better long-term stability for DC-critical applications; introduces 100 nVP-P chopper ripple at 10 Hz | Choose when ultra-low drift dominates over micropower and noise floor requirements |
Compared with LT2079CS#TRPBF, LT2079AIS#TRPBF guarantees industrial-temperature performance and tighter offset drift; compared with OPA2333AIDR, it trades zero-drift precision for lower noise, no switching artifacts, and 34% lower supply current - making it optimal for battery-constrained, wideband sensor interfaces.
Availability
LT2079AIS#TRPBF is available at Aetrix Electronics and suitable for remote sensor amplification, thermocouple conditioning, micropower sample-and-hold circuits, and single-battery instrumentation amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT2079AIS#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT2079AIS#TRPBF belongs to ADI's legacy Linear Technology precision op amp portfolio, designed specifically for micropower, single-supply, high-accuracy signal conditioning in resource-constrained environments - emphasizing low VOS, ultra-low IQ, and robust input/output behavior near ground.
FAQ
What is the maximum supply voltage rating for LT2079AIS#TRPBF?
The LT2079AIS#TRPBF has an absolute maximum supply voltage rating of ±22V. However, it is fully specified and optimized for operation at 5V/0V single supply or ±15V dual supply. Operating beyond ±22V risks permanent damage. For battery-powered designs, the device functions reliably down to 2.2V total supply (e.g., one lithium cell), though offset voltage skew may increase slightly below 2.5V.
Does LT2079AIS#TRPBF require external pull-down resistors for ground-swing output operation?
No, LT2079AIS#TRPBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 125 mV of ground at 100 µA load - a key differentiator from competing micropower op amps like OP-290 or LM158, which require 10–15 kΩ pull-downs that consume excessive current. This feature directly enables true micropower operation in sensor amplifiers and instrumentation circuits.
What is the guaranteed input offset voltage drift specification for LT2079AIS#TRPBF over temperature?
The LT2079AIS#TRPBF guarantees an input offset voltage drift of 0.6 µV/°C maximum over the full –40°C to 85°C industrial temperature range. At typical conditions (25°C), drift is 0.4 µV/°C. This tight drift spec ensures predictable, low-error performance in outdoor or factory-floor applications where ambient temperature varies significantly - critical for precision thermocouple or strain gauge amplifiers.
Can LT2079AIS#TRPBF be used as a comparator in single-supply systems?
Yes, LT2079AIS#TRPBF can be used as a precision comparator in single-supply systems due to its rail-to-ground output swing, fast large-signal response (≈200 µs to settle within 10 mV), and immunity to phase reversal - even with inputs driven to –1V. It delivers TTL-compatible output levels when V+ = 5V and V– = 0V, making it suitable for low-speed threshold detection in battery-powered monitoring systems without requiring additional level-shifting circuitry.
How does LT2079AIS#TRPBF handle input voltages below ground in single-supply operation?
The LT2079AIS#TRPBF incorporates internal series input resistors that protect against latch-up and phase reversal when inputs fall below ground. It safely tolerates –1V at the input (relative to V– = 0V) without damage or output inversion - unlike LM158 or OP-290, which exhibit phase reversal at –0.4V. This robustness enables reliable interfacing with AC-coupled sensors or transient-prone industrial signals without external clamping diodes or protection networks.
LT2079AIS#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:
- -
- Slew Rate:
- 0.07V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 60 µV
- Current - Supply:
- 46µA (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
LT2079AIS#TRPBF FAQ
1.How can I place an order for LT2079AIS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2079AIS#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 LT2079AIS#TRPBF reliable?
The price and inventory of LT2079AIS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2079AIS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT2079AIS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2079AIS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2079AIS#TRPBF?
LT2079AIS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2079AIS#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 LT2079AIS#TRPBF?
For technical support, including LT2079AIS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2079AIS#TRPBF requirements.
6.How does Aetrix verify that LT2079AIS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT2079AIS#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 LT2079AIS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT2079AIS#TRPBF?
All LT2079AIS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2079AIS#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 LT2079AIS#TRPBF part is unused and in its original packaging.
Return procedure for LT2079AIS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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