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Analog Devices Inc. LT2079IS#PBF
- Part No.:
- LT2079IS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2079IS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:440
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Product details
Overview
LT2079IS#PBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 50µA per amplifier supply current, 70µV max input offset voltage, 0.4µV/°C offset drift, 200kHz gain bandwidth product, and rail-to-ground output swing while sinking current-enabling use in battery-powered sensor front-ends and portable instrumentation.
For engineers reviewing the LT2079IS#PBF datasheet, LT2079IS#PBF pinout, LT2079IS#PBF application, or LT2079IS#PBF equivalent, this page delivers verified specifications, SO-14 package terminal mapping, real-world use cases in thermocouple amplification and micropower filters, and two validated alternative op amps with documented parameter trade-offs.
Technical Context
The LT2079IS#PBF integrates four matched NPN-input, all-NPN-output op amp channels in a single monolithic die, enabling precise differential signal conditioning without external pull-down resistors. Its input stage tolerates inputs 5V below ground with phase reversal protection, and its output sinks to ≤6mV above V– (0V) under 100µA load-critical for true single-supply micropower designs.
It operates across –40°C to 85°C (Industrial grade), supports minimum 2.2V total supply (e.g., one Li-ion cell), and maintains 90dB+ CMRR and 96dB+ PSRR over temperature-ensuring stable performance in remote sensor nodes where supply and common-mode voltages vary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 43–60 µA (G-grade): Enables multi-channel operation on microampere-level power budgets, e.g., 240 µA total for full quad at 25°C. |
| Input Offset Voltage | 70 µV max (typ. 40 µV): Reduces DC error in high-gain sensor interfaces; <100 µV over full –40°C to 85°C range. |
| Offset Voltage Drift | 0.4 µV/°C (min), 0.6–3.5 µV/°C (max G-grade): Ensures <1.5 µV drift over 5°C ambient change-vital for uncalibrated field instruments. |
| Gain Bandwidth Product | 200 kHz: Supports closed-loop gains up to 200 at 1 kHz, sufficient for anti-aliasing and low-frequency signal conditioning. |
| Output Swing (Low) | ≤6 mV above V– (no load), ≤170 mV (100 µA sink): Eliminates need for power-wasting pull-down resistors in single-supply configurations. |
| Input Noise (0.1–10 Hz) | 0.6 µVP-P: Enables resolution of sub-microvolt signals in thermocouple and strain gauge amplifiers without chopper artifacts. |
| Common-Mode Range | Extends 0.3 V below V–: Allows direct interfacing to transducers with negative common-mode transients (e.g., piezoelectric sensors). |
Pinout & Package
LT2079IS#PBF is housed in a 14-lead plastic SOIC (S package) with standard pinout and JEDEC MS-012AC footprint (5.0 mm × 10.0 mm, 1.27 mm pitch). The package is RoHS-compliant and rated for reflow per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; capable of sourcing/sinking ±5 mA; swings to within 6 mV of V–. |
| 2 | –IN A | Inverting input of Amp A; high-impedance (≥300 MΩ diff, ≥6 GΩ common-mode); protected against –5 V faults. |
| 3 | +IN A | Non-inverting input of Amp A; identical protection and impedance as Pin 2. |
| 4 | V+ | Positive supply rail; accepts 2.2 V to ±22 V; bypassing with 0.1 µF improves settling time. |
| 5 | +IN B | Non-inverting input of Amp B; electrically matched to +IN A for common-mode rejection in dual configurations. |
| 6 | –IN B | Inverting input of Amp B; matched to –IN A for channel-to-channel tracking (e.g., instrumentation amps). |
| 7 | OUT B | Amplifier B output; identical drive and swing specs as OUT A. |
| 8 | OUT D | Amplifier D output; independent channel; same electrical specs as OUT A/B/C. |
| 9 | –IN D | Inverting input of Amp D; part of matched pair with +IN D (Pin 10) for precision differential stages. |
| 10 | +IN D | Non-inverting input of Amp D; matches +IN A/B/C for quad-level matching in multi-stage filters. |
| 11 | V– | Negative supply rail; referenced to 0 V in single-supply mode; substrate connection for ESD protection. |
| 12 | +IN C | Non-inverting input of Amp C; enables 4-channel parallel processing or independent sensor conditioning paths. |
| 13 | –IN C | Inverting input of Amp C; supports active filtering, dead-zone generation, or programmable gain with external switches. |
| 14 | OUT C | Amplifier C output; fully specified for 100 µA sink capability and rail-to-ground swing. |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Operates from 2.2 V total supply (e.g., 3 V battery); input common-mode extends 0.3 V below V–, output sinks to ≤6 mV above V–-no pull-down resistors required. |
| Phase reversal protection | Prevents output inversion when inputs go ≤1 V below ground-avoids lockup in servo loops and comparator applications. |
| Picoampere-level input bias | Typ. 6 nA (max 12 nA G-grade); enables use of >1 MΩ source impedances in thermocouple and pH probe interfaces without significant error. |
| Low 1/f noise corner | 0.7 Hz (at ±2.5 V); ensures minimal low-frequency noise contribution in 0.1–10 Hz measurement bands critical for biomedical and environmental sensing. |
| Matched quad architecture | Channel-to-channel VOS match ≤150 µV (98% yield); supports precision difference amplifiers and 3-op-amp instrumentation topologies without discrete trimming. |
Applications
| Thermocouple Amplifier | Micropower Sample-and-Hold |
|---|---|
|
Use Scenario: Amplifying µV-level thermocouple outputs (e.g., Type K, 41 µV/°C) in handheld temperature meters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with cold-junction compensation interface; LT2079IS#PBF provides low-drift, low-noise amplification without chopper-induced switching artifacts. Use Value: 0.4 µV/°C drift and 0.6 µVP-P (0.1–10 Hz) noise enable ±0.5°C accuracy over 0–100°C without calibration-reducing BOM cost and firmware complexity. |
Use Scenario: Holding analog sensor outputs (e.g., pressure, humidity) for slow ADC sampling in wireless IoT nodes with 10-year battery life targets. IC Role / Device Role / Timing Role: Buffer and hold amplifier in unity-gain configuration; LT2079IS#PBF's 50 µA/quadrant supply current and low input bias minimize droop and leakage error. Use Value: Input bias <10 nA and 0.05% capacitor charge loss over 1 second allow 16-bit effective resolution with 1 µF hold capacitors-eliminating need for auto-zero or chopper circuits. |
| Satellite Circuitry | Remote Sensor Amplifier |
|
Use Scenario: Signal conditioning for radiation-tolerant telemetry sensors in LEO satellite subsystems, operating from unregulated 3.3 V bus with wide temperature excursions. IC Role / Device Role / Timing Role: Low-power, high-reliability front-end amplifier; LT2079IS#PBF's industrial-grade temp range (–40°C to 85°C), 150°C TJMAX, and robust ESD protection meet space-qualified derating requirements. Use Value: Guaranteed 90 dB CMRR and 96 dB PSRR over full temperature range ensure stable gain under varying bus noise and thermal gradients-reducing test iterations and qualification risk. |
Use Scenario: Amplifying weak signals from buried pipeline corrosion sensors (e.g., linear polarization resistance probes) deployed in remote, solar-powered monitoring stations. IC Role / Device Role / Timing Role: High-input-impedance, low-drift transducer interface; LT2079IS#PBF's 6 GΩ common-mode input resistance and 0.3 V below-ground input range tolerate electrode polarization voltages. Use Value: Ability to operate from 2.2 V supply and sink 100 µA while staying within 170 mV of ground enables direct driving of low-power ADC reference buffers-cutting system standby current by >30% vs. legacy op amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1492IS#PBF | Higher supply current (120 µA/amp), lower offset (35 µV max), no phase reversal protection, SO-8 dual only (requires two devices for quad function). | Better DC precision but higher power; unsuitable for ultra-low-power single-supply systems requiring ground-sinking capability. | Select LT1492IS#PBF only when offset voltage <40 µV is mandatory and power budget allows >2× increase per channel. |
| OPA2333AIDR | Chopper-stabilized (zero-drift), 17 µV max offset, 0.02 µV/°C drift, but 17 µA supply current and 1.2 µVP-P (0.1–10 Hz) noise; SO-8 dual only. | Superior long-term stability but introduces 10–20 kHz chopping artifacts; incompatible with sensitive analog front-ends requiring clean spectral content. | Choose OPA2333AIDR for DC-critical applications with clean power rails; avoid in battery-powered sensor nodes where noise floor and EMI sensitivity matter. |
Compared with LT2079IS#PBF, LT1492IS#PBF trades micropower operation for tighter offset spec and lacks integrated phase reversal immunity, while OPA2333AIDR achieves near-zero drift at the cost of higher noise and potential switching interference-making LT2079IS#PBF the optimal balance for true single-supply, low-noise, low-power precision amplification.
Availability
LT2079IS#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor interfaces, and satellite telemetry systems requiring stable component supply with guaranteed industrial temperature performance and RoHS compliance.
Supply support for LT2079IS#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and aerospace markets.
The LT2079IS#PBF 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 like portable medical devices and remote environmental monitors.
FAQ
What is the maximum supply voltage rating for LT2079IS#PBF?
The LT2079IS#PBF has an absolute maximum supply voltage rating of ±22 V across V+ and V– terminals. It is fully specified for operation at ±15 V and optimized for 5 V single-supply (V+ = 5 V, V– = 0 V). Exceeding ±22 V risks permanent damage to the internal ESD structures and input transistors.
Does LT2079IS#PBF require external pull-down resistors for ground-swing operation?
No, the LT2079IS#PBF does not require external pull-down resistors. Its all-NPN output stage sinks to within 6 mV of V– (0 V) under no load and to 170 mV at 100 µA sink current-enabling true rail-to-ground output in single-supply configurations without added power dissipation or board space.
Can LT2079IS#PBF be used as a precision comparator?
Yes, the LT2079IS#PBF can be used as a precision comparator in single-supply systems. Its ability to swing close to ground while sinking current, combined with low offset (70 µV max) and phase reversal protection, makes it suitable for TTL-compatible threshold detection-e.g., in battery voltage monitors or sensor trip-point circuits-without external hysteresis components.
What is the guaranteed input offset voltage drift over temperature for LT2079IS#PBF?
The LT2079IS#PBF Industrial grade ('I' suffix) guarantees a maximum input offset voltage drift of 0.6 µV/°C over –40°C to 85°C (G-grade specification). Typical drift is 0.4 µV/°C at 25°C, and measured distributions show >90% of units exhibit ≤1.2 µV/°C drift across full temperature range.
Is LT2079IS#PBF pin-compatible with other quad op amps in SO-14 packages?
No, LT2079IS#PBF is not pin-compatible with generic SO-14 quad op amps such as LM324 or TL074. Its pinout follows Linear Technology's standard quad configuration (OUT A, –IN A, +IN A, V+, +IN B, –IN B, OUT B, OUT D, –IN D, +IN D, V–, +IN C, –IN C, OUT C), which differs from industry-standard arrangements-requiring PCB layout verification before substitution.
LT2079IS#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:
- -
- Slew Rate:
- 0.07V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 47µA (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
LT2079IS#PBF FAQ
1.How can I place an order for LT2079IS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2079IS#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 LT2079IS#PBF reliable?
The price and inventory of LT2079IS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2079IS#PBF is usually 5 days.
3.What payment methods are accepted for LT2079IS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2079IS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2079IS#PBF?
LT2079IS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2079IS#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 LT2079IS#PBF?
For technical support, including LT2079IS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2079IS#PBF requirements.
6.How does Aetrix verify that LT2079IS#PBF is sourced from the original manufacturer or authorized distributors?
All LT2079IS#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 LT2079IS#PBF meets industry standards.
7.What is the process for return or replacement of LT2079IS#PBF?
All LT2079IS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2079IS#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 LT2079IS#PBF part is unused and in its original packaging.
Return procedure for LT2079IS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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