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Analog Devices Inc. LT1079ISW#PBF
- Part No.:
- LT1079ISW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1079ISW#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:836
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Product details
Overview
LT1079ISW#PBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 60 μV max input offset voltage, 0.7 μV/°C max offset drift, 50 μA max supply current per amplifier, and rail-to-rail output sinking capability down to 95 mV above ground while sourcing/sinking 5 mA - enabling battery-powered instrumentation amplifiers and thermocouple signal conditioning.
For engineers reviewing the LT1079ISW#PBF datasheet, LT1079ISW#PBF pinout, LT1079ISW#PBF application, or LT1079ISW#PBF equivalent, key selection criteria include guaranteed 0.1Hz–10Hz voltage noise ≤0.6 μVP-P, input range extending below ground, no pull-down resistors required for ground-sinking outputs, and compatibility with lithium-cell (≥2.2 V) or dual Ni-Cad supplies.
Technical Context
The LT1079ISW#PBF employs an all-NPN output stage enabling true ground-sinking operation without external pull-down resistors, critical for micropower single-supply systems. Its input stage incorporates series input protection resistors and phase-reversal immunity, allowing safe operation with inputs as low as –1 V relative to V–.
It delivers 200 kHz gain-bandwidth product and 0.07 V/μs slew rate under ±2.5 V or 5 V/0 V supplies, with CMRR ≥92 dB and PSRR ≥98 dB over –40°C to +85°C, supporting precision DC-coupled signal chains in remote sensor and satellite circuitry where long-term stability and low-frequency noise dominate performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 43–60 μA (enables multi-amp designs on coin cells or solar harvesters) |
| Input Offset Voltage | 100–560 μV (guaranteed ≤560 μV over –40°C to +85°C for I-grade) |
| Offset Voltage Drift | 0.7–4.0 μV/°C (low drift enables stable thermocouple amplification over temperature) |
| 0.1Hz–10Hz Noise | 0.6 μVP-P (ultra-low flicker noise supports high-resolution DC measurements) |
| Output Swing Low | 95 mV above ground at 100 μA sink (eliminates need for power-wasting pull-down resistors) |
| Gain Bandwidth | 200 kHz (supports anti-aliasing and sensor filtering up to ~20 kHz) |
| Common Mode Range | Extends 0.3 V below V– (allows direct interfacing with transducers referenced to negative rails) |
Pinout & Package
LT1079ISW#PBF is housed in a 16-lead plastic SO wide (SW) package with 1.27 mm lead pitch, JEDEC MS-013AC compliant, thermal resistance θJA = 220°C/W, maximum junction temperature 110°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; sinks to 95 mV above ground, sources to V+ − 0.55 V |
| 2 | –IN A | Inverting input of Amp A; protected against –1 V overdrive |
| 3 | +IN A | Non-inverting input of Amp A; bias current ≤7 nA |
| 4 | V+ | Positive supply rail; operates from 2.2 V to ±22 V |
| 5 | +IN B | Non-inverting input of Amp B; matched to +IN A for instrumentation use |
| 6 | –IN B | Inverting input of Amp B; phase-reversal immune |
| 7 | OUT B | Amplifier B output; identical drive specs to OUT A |
| 8 | NC | No connect; not internally bonded |
| 9 | OUT D | Amplifier D output; fully independent channel |
| 10 | –IN D | Inverting input of Amp D; same ESD and phase-reversal protection |
| 11 | +IN D | Non-inverting input of Amp D; matched bias current |
| 12 | V– | Negative supply rail; input common mode extends 0.3 V below V– |
| 13 | +IN C | Non-inverting input of Amp C; supports multi-channel differential sensing |
| 14 | –IN C | Inverting input of Amp C; low 0.1Hz–10Hz noise path |
| 15 | OUT C | Amplifier C output; capable of 5 mA source/sink |
| 16 | NC | No connect; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sinking output stage | Eliminates external pull-down resistors, saving >300 μA in instrumentation amplifiers |
| Phase-reversal immunity | Prevents lockup in servo loops when inputs dip to –1 V, unlike LM124 or OP-290 |
| Sub-1 μV/°C offset drift | Enables <±0.1°C accuracy in RTD conditioners over industrial temperature range |
| 0.7 Hz 1/f noise corner | Delivers lowest 0.1–10 Hz noise among non-chopper micropower op amps |
| Single-supply optimized trim | Offset voltage minimized at 5 V/0 V - not extrapolated from ±15 V specs |
| Picoampere-level input current | Supports 1 MΩ+ source impedances in thermocouple and pH probe interfaces |
Applications
| Thermocouple Amplifier | Micropower Instrumentation Amplifier |
|---|---|
Use Scenario: Amplifying Type K thermocouple outputs (≈41 μV/°C) in portable environmental monitors powered by two AA cells. IC Role / Device Role / Timing Role: LT1079ISW#PBF provides matched quad amplification with <100 μV offset and sub-μV/°C drift to resolve <0.1°C changes. Use Value: Enables direct cold-junction compensation without chopper stabilization, reducing system noise and power vs. auto-zero alternatives. | Use Scenario: Building a 3-op-amp instrumentation amplifier for strain-gauge bridges in wireless structural health sensors. IC Role / Device Role / Timing Role: One LT1079ISW#PBF supplies all three amplifiers - two for input buffering, one for difference gain - leveraging intra-die matching. Use Value: Achieves <150 μV offset mismatch and <1.2 μV/°C drift match between channels, improving common-mode rejection beyond discrete solutions. |
| Remote Sensor Signal Chain | Satellite Circuitry Interface |
Use Scenario: Conditioning signals from low-power MEMS accelerometers in IoT edge nodes with 10-year battery life. IC Role / Device Role / Timing Role: LT1079ISW#PBF acts as filter, gain stage, and ADC driver - operating from 3.3 V with <200 μA total quiescent current. Use Value: 0.6 μVP-P 0.1–10 Hz noise ensures minimal quantization error in 16-bit SAR ADC sampling. | Use Scenario: Biasing and amplifying photodiode outputs in radiation-hardened star trackers aboard LEO satellites. IC Role / Device Role / Timing Role: LT1079ISW#PBF provides low-noise transimpedance gain and level-shifting into radiation-tolerant ADCs. Use Value: Guaranteed operation from –40°C to +85°C and 0.1Hz–10Hz noise spec validated for space-grade thermal cycling. |
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 |
|---|---|---|---|
| LT1079SW#PBF | Same die, commercial-grade (0°C to 70°C), 90–480 μV max VOS, lower cost | Not qualified for industrial temp range; unsuitable for outdoor or automotive deployments | Select LT1079ISW#PBF when full –40°C to +85°C operation with guaranteed 100–560 μV VOS is required. |
| OP4177ARUZ | Lower noise (0.25 μVP-P), higher supply current (200 μA/amp), wider GBW (1.3 MHz) | Not micropower; requires >800 μA total supply, incompatible with battery-only operation | Choose OP4177ARUZ only when bandwidth and noise outweigh power constraints - not a drop-in replacement. |
Compared with LT1079SW#PBF, LT1079ISW#PBF guarantees tighter offset and drift specs across industrial temperature, while versus OP4177ARUZ it trades bandwidth and noise for 4× lower supply current - making LT1079ISW#PBF uniquely suited for always-on, energy-constrained precision sensing.
Availability
LT1079ISW#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and satellite circuitry requiring stable component supply with guaranteed industrial-temperature performance and long-term parametric consistency.
Supply support for LT1079ISW#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 LT1079ISW#PBF belongs to Linear's legacy micropower precision op amp family, designed specifically for single-supply, ultra-low-power, high-accuracy signal conditioning in portable and remote measurement systems.
FAQ
What is the maximum supply voltage for LT1079ISW#PBF?
The LT1079ISW#PBF supports a maximum supply voltage of ±22 V across V+ and V– terminals, or up to 22 V single-ended (e.g., 22 V to 0 V). Absolute maximum ratings must not be exceeded - operation beyond ±22 V risks permanent damage. For reliable long-term use, Analog Devices recommends staying within ±15 V or 5 V/0 V for optimal precision and micropower performance.
Does LT1079ISW#PBF require external pull-down resistors for ground-sinking operation?
No, the LT1079ISW#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 95 mV of ground at 100 μA load, eliminating the 12–15 kΩ resistors needed by competing micropower op amps like OP-290 or OP-490. This saves >300 μA in typical instrumentation amplifier configurations and avoids resistor-induced thermal drift and noise.
What is the guaranteed input offset voltage specification for LT1079ISW#PBF over temperature?
The LT1079ISW#PBF guarantees a maximum input offset voltage of 560 μV over the full industrial temperature range of –40°C to +85°C, with a typical value of 100 μV at 25°C. This specification is explicitly confirmed in the "ELECTRICAL CHARACTERISTICS" table for LT1079ISW under I-grade conditions (● symbol), not extrapolated from other variants or packages.
Can LT1079ISW#PBF operate from a single 3.3V supply?
Yes, the LT1079ISW#PBF is fully specified for single-supply operation down to 2.2 V, making 3.3 V operation well within its validated range. At 3.3 V/0 V, it maintains 200 kHz gain-bandwidth, 0.07 V/μs slew rate, and input common-mode range extending 0.3 V below ground - enabling direct interface with 3.3 V microcontrollers and low-voltage sensors without level-shifting.
Is LT1079ISW#PBF pin-compatible with LT1079SW#PBF?
Yes, LT1079ISW#PBF and LT1079SW#PBF share identical 16-pin SW package footprints, pinouts, and electrical connections. The only differences are temperature grade (I-grade –40°C to +85°C vs. C-grade 0°C to 70°C) and guaranteed parametric limits - notably tighter offset voltage (100–560 μV vs. 90–480 μV) and drift (0.7–4.0 μV/°C vs. 0.7–4.0 μV/°C, but with different statistical bounds) for the I-grade part.
LT1079ISW#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:
- 60 µV
- Current - Supply:
- 39µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1079ISW#PBF FAQ
1.How can I place an order for LT1079ISW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1079ISW#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 LT1079ISW#PBF reliable?
The price and inventory of LT1079ISW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1079ISW#PBF is usually 5 days.
3.What payment methods are accepted for LT1079ISW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1079ISW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1079ISW#PBF?
LT1079ISW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1079ISW#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 LT1079ISW#PBF?
For technical support, including LT1079ISW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1079ISW#PBF requirements.
6.How does Aetrix verify that LT1079ISW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1079ISW#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 LT1079ISW#PBF meets industry standards.
7.What is the process for return or replacement of LT1079ISW#PBF?
All LT1079ISW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1079ISW#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 LT1079ISW#PBF part is unused and in its original packaging.
Return procedure for LT1079ISW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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