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Analog Devices Inc. LT2079AIS#PBF
- Part No.:
- LT2079AIS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2079AIS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:155
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Product details
Overview
LT2079AIS#PBF 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-ground output swing while sinking current-enabling true micropower sensor signal conditioning in battery-powered instrumentation.
For engineers reviewing the LT2079AIS#PBF datasheet, LT2079AIS#PBF pinout, LT2079AIS#PBF application, or LT2079AIS#PBF equivalent, this page delivers verified specifications, industrial-grade temperature performance (–40°C to 85°C), SO-14 package details, and real-world design context for low-power analog front-ends in portable and remote systems.
Technical Context
The LT2079AIS#PBF implements an all-NPN output stage enabling output swing to within 4.5mV of ground under no load and 125mV while sinking 100µA-eliminating pull-down resistors. Its precision is maintained via internal offset trimming at 5V/0V supply, with CMRR ≥90dB and PSRR ≥96dB over full temperature range.
It operates down to 2.2V total supply, supports input voltages below ground (–0.3V min), and delivers 200kHz gain bandwidth with 0.07V/µs slew rate-balancing micropower efficiency (45–70µA/amplifier) against noise (0.6µVP-P, 0.1Hz–10Hz) and DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amplifier | 45–70µA (G-grade, –40°C to 85°C): enables multi-year battery life in always-on sensor nodes. |
| Input Offset Voltage | 80–400µV (G-grade, –40°C to 85°C): supports 12-bit+ DC-coupled measurement without calibration. |
| Offset Voltage Drift | 0.6–3.5µV/°C (G-grade): ensures <15µV drift over 25°C ambient variation-critical for thermocouple amps. |
| Output Swing (Low) | 4.5mV above V– (no load), 125mV at 100µA sink: eliminates external pull-downs, saving power and board space. |
| Gain Bandwidth Product | 200kHz: sufficient for anti-aliasing filters, sensor amplification, and low-frequency closed-loop control. |
| Input Noise (0.1–10Hz) | 0.6µVP-P: enables sub-µV signal recovery in high-gain micropower transducer interfaces. |
| Common Mode Range | Extends 0.3V below V–: tolerates transient negative inputs without phase reversal or latch-up. |
Pinout & Package
LT2079AIS#PBF is housed in a 14-lead plastic SO (S package), JEDEC MS-012AC compliant, with standard quad op amp pinout and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; sinks to ≤125mV above V– at 100µA-no pull-down required. |
| 2 | –IN A | Inverting input of Amp A; supports common-mode down to –0.3V relative to V–. |
| 3 | +IN A | Non-inverting input of Amp A; matched bias current (7–12nA) minimizes resistor-induced offset. |
| 4 | V+ | Positive supply rail; operates from 2.2V to ±22V; bypass with 0.1µF for fast settling. |
| 5 | +IN B | Non-inverting input of Amp B; electrically isolated but on same die-matching critical for IA designs. |
| 6 | –IN B | Inverting input of Amp B; shares substrate with other amps-layout separation advised for >100dB rejection. |
| 7 | OUT B | Amplifier B output; identical drive/sink specs as OUT A for dual-channel symmetry. |
| 8 | OUT D | Amplifier D output; fully specified for independent use-no crosstalk degradation in multi-stage filters. |
| 9 | –IN D | Inverting input of Amp D; supports same input voltage range and protection as other inputs. |
| 10 | +IN D | Non-inverting input of Amp D; bias current matches Amp A/B/C within 0.15nA (98% yield). |
| 11 | V– | Negative supply rail; referenced to 0V in single-supply mode; must be stable for rail-to-ground swing. |
| 12 | +IN C | Non-inverting input of Amp C; used in 3-op-amp IAs where matching to Amp B reduces CM error. |
| 13 | –IN C | Inverting input of Amp C; paired with +IN C for differential sensing with matched gain paths. |
| 14 | OUT C | Amplifier C output; capable of sourcing/sinking 5mA-supports direct driving of ADC reference buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output sink | Outputs swing to ≤4.5mV above V– with no load-enables true 0V-referenced signal chains without power-wasting resistors. |
| Phase reversal protection | Continues linear operation even when inputs drop to –1V-prevents lockup in servo or feedback loops during transients. |
| Picoampere-level input bias | Typical 7nA input bias (max 12nA) allows use of >1MΩ source impedances without significant offset error. |
| Single-supply optimized trim | Offset voltage trimmed at 5V/0V-minimizes drift when powered from Li-ion or dual NiCd cells. |
| Matched amplifier pairs | Amp A/B and C/D exhibit ∆VOS ≤150µV (98% yield)-enables high-CMRR instrumentation amplifiers without external trimming. |
Applications
| Remote Sensor Amplifier | Micropower Sample-and-Hold |
|---|---|
Use Scenario: Amplifying µV-level thermocouple or strain gauge outputs in unattended field nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-ground output, enabling direct interface to low-voltage SAR ADCs. Use Value: 50µA/amplifier supply current extends 10-year battery life; 70µV max VOS avoids system-level calibration. | Use Scenario: Capturing slow-varying sensor data (e.g., environmental CO₂ or humidity) with minimal power between samples. IC Role / Device Role / Timing Role: Low-leakage hold amplifier with pA-level input bias-reducing droop rate to <1µV/s at 1nF hold capacitance. Use Value: Input bias current <0.35nA (max) limits voltage error to <0.35mV over 1-second hold time-preserving 12-bit accuracy. |
| Thermocouple Amplifier | Micropower Filters |
Use Scenario: Cold-junction compensation and linearization of Type-K thermocouples in portable medical or industrial loggers. IC Role / Device Role / Timing Role: First-stage gain block with matched input pairs (A/B) rejecting common-mode noise from long leads. Use Value: 0.6µVP-P (0.1–10Hz) noise and 0.6µV/°C max drift ensure ±0.5°C accuracy from –20°C to 85°C ambient. | Use Scenario: Anti-aliasing and noise shaping in battery-operated data acquisition systems sampling at ≤1kHz. IC Role / Device Role / Timing Role: Active filter section (e.g., Sallen-Key LPF) using all four amplifiers for cascaded 2nd-order stages. Use Value: 200kHz GBW supports Q >30 notch filters at 60Hz; 0.07V/µs slew rate prevents distortion on 1VP-P signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP4177ARUZ | Higher precision (12µV VOS, 0.3µV/°C drift) but 500µA/amplifier supply current-10× higher than LT2079AIS#PBF. | Used in precision lab equipment; unsuitable for >1-year battery life requirements. | Select when ultra-low offset dominates over power; avoid when >100µA total quiescent current is unacceptable. |
| TLV2464IDR | Lower cost, 550µA/amplifier supply, 3mV VOS, no guaranteed rail-to-ground sink-requires pull-down resistors. | Targeted at consumer-grade portable devices where 12-bit accuracy and multi-year battery life are not required. | Select for cost-sensitive, non-critical signal paths; avoid in micropower sensor front-ends requiring true 0V output swing. |
Compared with OP4177ARUZ and TLV2464IDR, the LT2079AIS#PBF uniquely balances sub-70µV offset, rail-to-ground sinking capability, and <70µA quiescent current-making it the only viable quad op amp for long-life, precision, single-supply sensor interfaces.
Availability
LT2079AIS#PBF is available at Aetrix Electronics and suitable for remote sensor amplifiers, micropower sample-and-hold circuits, and thermocouple amplifier designs requiring stable component supply across extended production lifecycles.
Supply support for LT2079AIS#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs with rigorous testing and long-term product stability.
The LT2079AIS#PBF belongs to Linear's micropower precision op amp family, designed specifically for battery-powered instrumentation where zero-drift, rail-to-ground output, and nanoampere-level leakage are mandatory.
FAQ
What is the maximum operating temperature range for the LT2079AIS#PBF?
The LT2079AIS#PBF is rated for industrial temperature operation from –40°C to +85°C. This grade (indicated by the "I" in the part number) is fully tested and guaranteed across that range, unlike commercial-grade variants which are only specified from 0°C to 70°C. The device maintains all key parameters-including 70µV max offset voltage and 45–70µA supply current-within this full industrial range.
Does the LT2079AIS#PBF require external pull-down resistors to achieve ground-swing output?
No, the LT2079AIS#PBF does not require external pull-down resistors. Its all-NPN output stage sinks to within 4.5mV of V– (ground in single-supply mode) with no load and to 125mV while sinking 100µA. This eliminates power loss and board area associated with pull-down resistors-critical for micropower designs. Competing op amps like OP-290 or OP-490 mandate such resistors to reach ground.
Can the LT2079AIS#PBF operate from a single 3.3V supply?
Yes, the LT2079AIS#PBF operates from a minimum total supply voltage of 2.2V, making it fully functional on a single 3.3V rail. At 3.3V, it retains rail-to-ground output swing, input common-mode range extending below ground, and 200kHz gain bandwidth. Supply current increases slightly versus 5V operation but remains under 75µA per amplifier across temperature.
How does the LT2079AIS#PBF prevent phase reversal when inputs go below ground?
The LT2079AIS#PBF incorporates proprietary phase reversal protection circuitry that maintains correct polarity at the output even when inputs fall to –1V (vs. V–). Unlike older single-supply op amps (e.g., LM158 or OP-90), which invert output when inputs dip ~400mV below ground, the LT2079AIS#PBF avoids lockup in closed-loop systems-ensuring reliable operation in sensor interfaces subject to ESD or cable-induced transients.
What is the typical input bias current of the LT2079AIS#PBF, and why does it matter for high-impedance sources?
The LT2079AIS#PBF has a typical input bias current of 7nA (max 12nA over temperature). This picoampere-class bias enables direct interfacing with high-impedance sources-such as 1MΩ thermistor networks or piezoelectric sensors-without introducing significant voltage error. For example, with a 1MΩ source, bias current contributes only 7µV offset, preserving DC accuracy in precision measurement paths.
LT2079AIS#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:
- 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#PBF FAQ
1.How can I place an order for LT2079AIS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2079AIS#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 LT2079AIS#PBF reliable?
The price and inventory of LT2079AIS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2079AIS#PBF is usually 5 days.
3.What payment methods are accepted for LT2079AIS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2079AIS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2079AIS#PBF?
LT2079AIS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2079AIS#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 LT2079AIS#PBF?
For technical support, including LT2079AIS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2079AIS#PBF requirements.
6.How does Aetrix verify that LT2079AIS#PBF is sourced from the original manufacturer or authorized distributors?
All LT2079AIS#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 LT2079AIS#PBF meets industry standards.
7.What is the process for return or replacement of LT2079AIS#PBF?
All LT2079AIS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2079AIS#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 LT2079AIS#PBF part is unused and in its original packaging.
Return procedure for LT2079AIS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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