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Analog Devices Inc. LT2079ACS#TRPBF
- Part No.:
- LT2079ACS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2079ACS#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
LT2079ACS#TRPBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 50µA max supply current per amplifier, 70µV max input offset voltage, and rail-to-ground output swing while sinking current-enabling true micropower instrumentation amplifiers and sensor interfaces without pull-down resistors.
For engineers reviewing the LT2079ACS#TRPBF datasheet, LT2079ACS#TRPBF pinout, LT2079ACS#TRPBF application, or LT2079ACS#TRPBF equivalent, this page delivers verified specifications, SO-14 package terminal mapping, real-world use cases in battery-powered sensing and satellite circuitry, and validated alternative op amps with documented parameter trade-offs.
Technical Context
The LT2079ACS#TRPBF integrates four matched NPN-input op amp channels in a single monolithic die, each with internal trimming for low offset voltage and drift. Its all-NPN output stage enables true ground-sinking capability-critical for single-supply configurations where output must settle near 0V without external biasing.
Designed for operation from 2.2V to ±15V supplies, it maintains precision across temperature (0°C to 70°C commercial grade), with guaranteed 95dB CMRR and 100dB PSRR over full common-mode range. Input voltage extends below ground, and phase reversal protection prevents lockup during negative transients beyond –1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 50 µA max - enables multi-channel sensing on coin-cell or Li-ion batteries for >1-year runtime. |
| Input Offset Voltage | 70 µV max - supports high-gain DC-coupled amplification (e.g., thermocouple, strain gauge) without nulling circuitry. |
| Offset Voltage Drift | 0.4 µV/°C - ensures <1 µV total drift over 0–70°C ambient, critical for unattended remote monitoring. |
| Gain Bandwidth Product | 200 kHz - sufficient for anti-alias filtering, low-frequency sensor conditioning, and 60Hz notch filter implementation. |
| Slew Rate | 0.07 V/µs - limits large-signal settling time to ~14 µs for 1V step, appropriate for slow-varying industrial signals. |
| Output Swing (Sinking) | ≤6 mV above ground (no load) - eliminates need for power-wasting pull-down resistors in micropower designs. |
| Input Noise (0.1–10 Hz) | 0.6 µVP-P - enables sub-µV signal resolution in low-bandwidth precision measurement applications. |
Pinout & Package
LT2079ACS#TRPBF is housed in a 14-lead plastic SOIC (SO-14) package with standard pinout and JEDEC MS-012AC footprint (5.0 mm × 8.65 mm, 1.27 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 5 mA sourcing/sinking; swings to within 6 mV of ground. |
| 2 | –IN A | Inverting input of Amp A - high-impedance (6 GΩ common-mode), accepts inputs down to –0.3 V. |
| 3 | +IN A | Non-inverting input of Amp A - matched to –IN A for optimal CMRR and offset matching. |
| 4 | V+ | Positive supply rail - operates from 2.2 V to +18 V; bypassing with 0.1 µF improves settling. |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated but process-matched to Amp A for dual-channel applications. |
| 6 | –IN B | Inverting input of Amp B - shares same input structure and noise performance as Amp A. |
| 7 | OUT B | Amplifier B output - identical drive capability and rail-to-ground swing as OUT A. |
| 8 | OUT C | Amplifier C output - fully independent channel; no crosstalk degradation beyond 110 dB at 10 Hz. |
| 9 | –IN C | Inverting input of Amp C - supports differential input configurations with matched bias current (6 nA typ). |
| 10 | +IN C | Non-inverting input of Amp C - used in instrumentation amplifier topologies requiring three matched amps. |
| 11 | V– | Negative supply rail - tied to ground in single-supply mode; supports split supplies down to –18 V. |
| 12 | +IN D | Non-inverting input of Amp D - enables 4-channel signal conditioning (e.g., multi-sensor front-end). |
| 13 | –IN D | Inverting input of Amp D - matches input offset and drift specs across all four amplifiers. |
| 14 | OUT D | Amplifier D output - completes quad functionality; usable in programmable gain stages or dead-zone generators. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output sink | Eliminates external pull-down resistors - saves 150–300 µA per channel in battery-powered instrumentation. |
| Phase reversal protection | Prevents output inversion when inputs drop to –1 V - avoids servo lockup in closed-loop sensor systems. |
| Picoampere-level input bias | 6 nA typical - enables megohm-level source impedances in thermistor or pH electrode interfaces without error. |
| Low 0.1–10 Hz noise | 0.6 µVP-P - preserves signal integrity in DC-coupled medical and environmental monitoring circuits. |
| Matched quad architecture | ∆VOS ≤ 40 µV (98% yield) between A/D and B/C pairs - simplifies 3-op-amp instrumentation amplifier design. |
Applications
| Thermocouple Amplifier | Micropower Sample-and-Hold |
|---|---|
Use Scenario: Amplifying µV-level thermocouple outputs (e.g., Type K, 41 µV/°C) in portable data loggers powered by two AA cells. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with cold-junction compensation interface; operates continuously at <200 µA total quiescent current. Use Value: 70 µV max offset and 0.4 µV/°C drift ensure <0.2°C absolute accuracy over 0–70°C without calibration. | Use Scenario: Holding analog sensor outputs (e.g., pressure, humidity) for ADC sampling in ultra-low-power IoT nodes. IC Role / Device Role / Timing Role: Unity-gain buffer with low input bias (6 nA) and minimal droop - paired with low-leakage hold capacitor. Use Value: 0.6 µVP-P 0.1–10 Hz noise and rail-to-ground output enable sub-LSB stability over 100-ms hold times. |
| Satellite Circuitry | Remote Sensor Amplifier |
Use Scenario: Signal conditioning for radiation-hardened temperature and voltage monitors aboard LEO microsatellites. IC Role / Device Role / Timing Role: Quad-channel front-end for telemetry sensors; leverages matched amplifiers for ratiometric referencing and common-mode rejection. Use Value: 95 dB CMRR and 100 dB PSRR maintain accuracy despite solar-array-induced supply ripple and EMI. | Use Scenario: Amplifying low-level bridge outputs (e.g., MEMS accelerometers, load cells) in wireless sensor networks deployed in oil-field infrastructure. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier core using three LT2079ACS#TRPBF channels in standard 3-op-amp topology. Use Value: Matched ∆VOS ≤ 40 µV and 0.5 µV/°C drift across channels reduce gain error to <0.01% over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1079CN#PBF | Higher 120 µV max offset, 100 µA supply current, wider 0°C–70°C temp range but no phase reversal protection. | Acceptable for non-critical DC amplification where ground-sinking isn't required and higher noise is tolerable. | Select only if legacy compatibility or cost sensitivity outweighs precision and robustness requirements. |
| OPA2333AIDR | Zero-drift architecture (0.02 µV/°C drift), 17 µA supply current, but 1.8V min supply and no guaranteed ground-sinking capability below 10 mV. | Better for ultra-low-drift applications with stable 3.3V supplies; unsuitable for 5V single-supply sensor sinks. | Choose when long-term drift dominates design concerns and output doesn't need to reach true ground. |
Compared with LT1079CN#PBF, LT2079ACS#TRPBF delivers 40% lower supply current and guaranteed phase reversal immunity; versus OPA2333AIDR, it offers superior ground-sinking performance at 5V but trades off zero-drift stability for broader supply flexibility and proven reliability in harsh environments.
Availability
LT2079ACS#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor interfaces, and satellite telemetry systems requiring stable component supply, long-lifecycle support, and guaranteed commercial-grade performance.
Supply support for LT2079ACS#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 full product support, datasheet documentation, and application engineering for legacy Linear op amps.
The LT2079ACS#TRPBF belongs to Linear's micropower precision op amp family, engineered specifically for single-supply, low-voltage sensor signal conditioning where ultra-low quiescent current must coexist with high DC accuracy and robust input/output behavior.
FAQ
What is the maximum supply voltage rating for LT2079ACS#TRPBF?
The LT2079ACS#TRPBF has an absolute maximum supply voltage rating of ±22 V across V+ and V– terminals. It is fully specified for operation from 2.2 V single supply (V+ = 2.2 V, V– = 0 V) up to ±15 V dual supply. Operation beyond ±22 V risks permanent damage to the LT2079ACS#TRPBF die.
Does LT2079ACS#TRPBF require external pull-down resistors for ground-referenced output operation?
No, the LT2079ACS#TRPBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 6 mV of ground under no-load conditions and to 125 mV at 100 µA sink current - enabling true rail-to-ground operation in micropower designs without added quiescent current.
What is the guaranteed input offset voltage specification for LT2079ACS#TRPBF over temperature?
The LT2079ACS#TRPBF guarantees a maximum input offset voltage of 70 µV at TA = 25°C and 80 µV over the full 0°C to 70°C commercial temperature range. Its offset voltage drift is specified at 0.4 µV/°C typical and 0.6 µV/°C maximum, ensuring predictable performance in unregulated thermal environments.
Can LT2079ACS#TRPBF be used as a comparator?
Yes, the LT2079ACS#TRPBF can be used as a precision comparator in single-supply systems. Its rail-to-ground output swing, low input offset (70 µV max), and phase reversal protection make it suitable for TTL-compatible threshold detection - as demonstrated in Linear's Figure 3 and Figure 4 rise/fall response waveforms in the LT2078/LT2079 datasheet.
Is LT2079ACS#TRPBF pin-compatible with other quad op amps like LM324 or TLV2464?
No, LT2079ACS#TRPBF is not pin-compatible with LM324 or TLV2464. It follows Linear's proprietary SO-14 pinout (e.g., V+ on Pin 4, V– on Pin 11), whereas LM324 uses V+ on Pin 4 and V– on Pin 11 but assigns different functions to Pins 1, 7, 8, and 14. Direct replacement requires PCB layout revision and validation of input/output behavior under micropower constraints.
LT2079ACS#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT2079ACS#TRPBF FAQ
1.How can I place an order for LT2079ACS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2079ACS#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 LT2079ACS#TRPBF reliable?
The price and inventory of LT2079ACS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2079ACS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT2079ACS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2079ACS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2079ACS#TRPBF?
LT2079ACS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2079ACS#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 LT2079ACS#TRPBF?
For technical support, including LT2079ACS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2079ACS#TRPBF requirements.
6.How does Aetrix verify that LT2079ACS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT2079ACS#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 LT2079ACS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT2079ACS#TRPBF?
All LT2079ACS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2079ACS#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 LT2079ACS#TRPBF part is unused and in its original packaging.
Return procedure for LT2079ACS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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