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Analog Devices Inc. LT1079SW#PBF
- Part No.:
- LT1079SW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1079SW#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:446
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Product details
Overview
LT1079SW#PBF 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, 300μV max input offset voltage (in SW package), 200kHz gain bandwidth product, and rail-to-ground output swing while sinking current-enabling thermocouple amplification, portable sensor interfaces, and battery-powered instrumentation.
For engineers reviewing the LT1079SW#PBF datasheet, LT1079SW#PBF pinout, LT1079SW#PBF application, or LT1079SW#PBF equivalent, key selection criteria include verified 16-pin SO wide package compatibility, guaranteed 0.7μV/°C max offset drift over –40°C to 85°C, low 0.6μVP-P (0.1Hz–10Hz) voltage noise, and absence of pull-down resistors in ground-sinking configurations.
Technical Context
The LT1079SW#PBF implements an all-NPN output stage enabling true ground-swing capability (≤1mV above GND when sinking 100μA) without external pull-downs, critical for micropower single-supply systems. Its input stage includes series input protection resistors preventing destructive substrate conduction during inputs down to –5V relative to V–.
Phase reversal immunity is achieved via proprietary internal circuitry-maintaining correct polarity even with –1V input transients-unlike legacy op amps (e.g., OP-90) that invert output under similar conditions. The device's 0.7Hz 1/f noise corner enables ultra-low-frequency precision in thermocouple and RTD signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 50μA max - enables multi-year battery life in remote sensors |
| Input Offset Voltage | 300μV max (SW package, 0°C–70°C) - supports 12-bit accuracy in 5V systems |
| Offset Voltage Drift | 0.7μV/°C max - ensures <15μV total drift across industrial temperature range |
| Gain Bandwidth Product | 200kHz - sufficient for anti-aliasing filters and 60Hz notch designs |
| Voltage Noise (0.1–10Hz) | 0.6μVP-P - preserves signal integrity in low-frequency sensor front-ends |
| Output Swing (Low) | ≤1mV above GND (100μA sink) - eliminates need for power-wasting pull-down resistors |
| Common Mode Range | Extends 0.3V below V– - accommodates negative transients without phase reversal |
Pinout & Package
LT1079SW#PBF is housed in a 16-lead plastic SO wide (SW) package with 1.27mm lead pitch, JEDEC MS-013AC compliant, thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads to ground without external components |
| 2 | –IN A | Inverting input A - protected against –5V overvoltage |
| 3 | +IN A | Non-inverting input A - high-impedance (6GΩ common-mode) |
| 4 | V+ | Positive supply - operates down to 2.2V for single Li-cell use |
| 5 | +IN B | Non-inverting input B - matched to +IN A for instrumentation amp topologies |
| 6 | –IN B | Inverting input B - identical protection and bias specs as Pin 2 |
| 7 | OUT B | Amplifier B output - independent rail-to-ground swing |
| 8 | NC | No connect - not internally bonded; leave unconnected |
| 9 | OUT D | Amplifier D output - fully isolated channel for reference buffering |
| 10 | –IN D | Inverting input D - supports differential sensing with matched pair C/D |
| 11 | +IN D | Non-inverting input D - low 0.05nA typical offset current |
| 12 | V– | Negative supply - referenced to ground in single-supply mode |
| 13 | +IN C | Non-inverting input C - used with –IN C for precision difference amplifiers |
| 14 | –IN C | Inverting input C - matched to +IN C for <150μV inter-channel VOS mismatch |
| 15 | OUT C | Amplifier C output - supports dual-output filter or active rectifier stages |
| 16 | NC | No connect - not internally bonded; leave unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output sink | Operates at ≤1mV above GND with 100μA load - removes 300μA pull-down resistor current in instrumentation amps |
| Phase reversal immunity | Maintains correct output polarity with –1V input transients - prevents servo lockup in closed-loop systems |
| Ultra-low 1/f noise corner | 0.7Hz corner frequency - delivers 0.6μVP-P noise (0.1–10Hz), outperforming competitors by 3× at sub-10Hz |
| Single-supply optimized trimming | Offset voltage minimized at 5V/0V - avoids >8μV PSRR-induced shift when using 9V batteries |
| Picoampere-level input bias | 6nA max input bias current - enables megohm-level source resistors in high-impedance sensor interfaces |
Applications
| Thermocouple Amplifier | Portable Instrumentation Front-End |
|---|---|
Use Scenario: Amplifying μV-level J-type thermocouple outputs (–210°C to +760°C) in handheld calibrators with 3V coin-cell power. IC Role / Device Role / Timing Role: Quad amplifier configured as precision difference amp + cold-junction compensation buffer + reference follower + filter stage. Use Value: 300μV max VOS and 0.7μV/°C drift ensure ±0.5°C accuracy over 0–50°C ambient; 50μA/amp current extends battery life to >2 years. | Use Scenario: Signal conditioning for 4–20mA loop-powered field transmitters in wireless sensor nodes. IC Role / Device Role / Timing Role: Dual op-amps implement I/V conversion and 2nd-order low-pass filtering; remaining two amps buffer references and drive ADC inputs. Use Value: Rail-to-ground output swing eliminates pull-down resistors, reducing quiescent current by 300μA; 200kHz GBW supports 60Hz notch filter implementation. |
| Satellite Sensor Interface | Micropower RTD Signal Conditioner |
Use Scenario: Low-power analog front-end for radiation-hardened satellite temperature and pressure sensors operating on solar-battery hybrid power. IC Role / Device Role / Timing Role: Quad configuration provides isolated signal paths for redundant sensor pairs, with one amp dedicated to precision voltage reference buffering. Use Value: 0.6μVP-P (0.1–10Hz) noise preserves SNR in ultra-low-bandwidth telemetry; 2.2V min supply allows operation during solar panel brownouts. | Use Scenario: Platinum RTD (PT100) linearization and amplification in battery-operated environmental monitors (–40°C to +85°C). IC Role / Device Role / Timing Role: One amp configures constant-current excitation; second implements curvature correction; third buffers reference; fourth drives ADC. Use Value: Matched VOS drift (<0.7μV/°C) between channels minimizes residual nonlinearity; picoampere input bias prevents self-heating errors in 1kΩ RTD bridges. |
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 |
|---|---|---|---|
| LT1079CN | 14-pin PDIP package; 180μV max VOS (0°C–70°C); θJA = 100°C/W | Through-hole mounting only; higher thermal resistance limits high-density PCB use | Select for prototyping or legacy through-hole designs where SO wide footprint is unavailable |
| OP484ESZ | 325μA/amp supply current; 600μV max VOS; rail-to-rail input/output; 4.25MHz GBW | Higher power, wider bandwidth - suitable for active filters but incompatible with multi-year battery life targets | Select when bandwidth >1MHz or rail-to-rail input is required; avoid for micropower-critical designs |
Compared with LT1079SW#PBF, LT1079CN offers lower offset voltage but lacks surface-mount compatibility and thermal performance, while OP484ESZ trades 6.5× higher supply current for bandwidth and rail-to-rail flexibility-making LT1079SW#PBF uniquely suited for long-life, ground-swing, low-noise sensor interfaces.
Availability
LT1079SW#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and satellite circuitry requiring stable component supply with guaranteed long-term availability.
Supply support for LT1079SW#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 semiconductors.
The LT1079SW#PBF belongs to Linear Technology's micropower precision op amp family, designed specifically for single-supply, low-voltage sensor signal conditioning where ground-swing capability, ultra-low noise, and multi-year battery life are mandatory.
FAQ
What is the maximum supply voltage rating for LT1079SW#PBF?
The absolute maximum supply voltage for LT1079SW#PBF is ±22V, with differential input voltage rated to ±30V. However, it is optimized for single-supply operation at 5V (V+ = 5V, V– = 0V) and functions reliably down to 2.2V total supply. Operation at ±15V is supported for compatibility testing but increases supply current to 65μA per amplifier.
Does LT1079SW#PBF require external pull-down resistors for ground-swing operation?
No, LT1079SW#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 1mV of ground at 100μA load, eliminating the 300μA quiescent current penalty imposed by pull-down resistors in competing micropower op amps like OP-290 or OP-490-critical for battery longevity in LT1079SW#PBF-based designs.
What is the guaranteed input offset voltage specification for LT1079SW#PBF over temperature?
For LT1079SW#PBF, the input offset voltage is guaranteed to 480μV max over 0°C to 70°C (C grade), and 560μV max over –40°C to 85°C (I grade). The offset voltage drift is specified at 0.7μV/°C max over the full I-grade range, ensuring predictable performance in industrial environments without recalibration.
Can LT1079SW#PBF be used in comparator applications?
Yes, LT1079SW#PBF is suitable for precision comparator applications due to its single-supply operation, rail-to-ground output swing, and TTL-compatible output levels. With 5V supply, its output swings from <1mV to >4.2V, providing clean logic transitions. Rise/fall times to 2mV overdrive are <200μs, making LT1079SW#PBF viable for low-speed threshold detection in micropower systems.
Is LT1079SW#PBF pin-compatible with other LT1079 variants?
LT1079SW#PBF is not pin-compatible with 14-pin LT1079 variants (e.g., LT1079CN or LT1079IN) due to its 16-pin SO wide package and two NC pins (Pins 8 and 16). It shares functional equivalence with the LT1079 family but requires unique PCB layout. For drop-in replacement in existing 14-pin footprints, LT1079CN is recommended instead of LT1079SW#PBF.
LT1079SW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.1V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 39µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1079SW#PBF FAQ
1.How can I place an order for LT1079SW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1079SW#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 LT1079SW#PBF reliable?
The price and inventory of LT1079SW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1079SW#PBF is usually 5 days.
3.What payment methods are accepted for LT1079SW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1079SW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1079SW#PBF?
LT1079SW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1079SW#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 LT1079SW#PBF?
For technical support, including LT1079SW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1079SW#PBF requirements.
6.How does Aetrix verify that LT1079SW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1079SW#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 LT1079SW#PBF meets industry standards.
7.What is the process for return or replacement of LT1079SW#PBF?
All LT1079SW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1079SW#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 LT1079SW#PBF part is unused and in its original packaging.
Return procedure for LT1079SW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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