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Analog Devices Inc. LT1077IN8#PBF
- Part No.:
- LT1077IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1077IN8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:181
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Product details
Overview
LT1077IN8#PBF from Analog Devices (formerly Linear Technology) is a micropower precision operational amplifier optimized for single-supply 5V operation, featuring 40µV max input offset voltage, 60µA max supply current, 250kHz gain-bandwidth product, 0.12V/µs slew rate, and rail-to-ground output swing while sinking current-enabling use in battery-powered sensor front-ends and 4–20mA current loops.
For engineers reviewing the LT1077IN8#PBF datasheet, LT1077IN8#PBF pinout, LT1077IN8#PBF application, or LT1077IN8#PBF equivalent, key selection considerations include its ultra-low power consumption with precision performance, single-supply compatibility down to 2.2V, absence of pull-down resistors for ground-sinking output, and plug-in replacement capability for OP-07/AD707/LT1001 in legacy designs.
Technical Context
The LT1077IN8#PBF employs an all-NPN output stage enabling true ground-swing capability when sinking current without external pull-down resistors. Its input stage includes series protection resistors allowing safe operation with inputs up to 5V below ground and built-in phase reversal protection.
It achieves micropower operation without sacrificing precision: offset voltage drift is specified at 0.4µV/°C (typ), voltage noise is 0.5µVP-P (0.1Hz–10Hz), and current noise is 2.5pAP-P (0.1Hz–10Hz)-performance levels unattainable in competing micropower op amps at comparable supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 60µA max - enables multi-year operation on coin-cell batteries in always-on sensor nodes. |
| Input Offset Voltage | 40µV max - supports high-gain DC-coupled amplification (e.g., µV-level thermocouple signals) without nulling circuitry. |
| Gain-Bandwidth Product | 250kHz - sufficient for anti-aliasing filters, low-speed data acquisition, and loop compensation in 4–20mA transmitters. |
| Slew Rate | 0.12V/µs - adequate for settling 12-bit DAC outputs and step responses in industrial control feedback paths. |
| Input Voltage Range | Includes ground (V– – 0.3V min) - allows direct interfacing with 0V-referenced sensors and microcontroller GPIOs. |
| Output Swing (Sinking) | ≤6mV above ground with 100µA load - eliminates need for pull-down resistors, preserving micropower integrity in low-side current sensing. |
| Common-Mode Rejection | 94dB min (0°C–70°C) - maintains accuracy in noisy industrial environments with varying common-mode offsets. |
Pinout & Package
N8 package: 8-lead PDIP (Plastic Dual In-line Package), 0.300-inch width, operating temperature range –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS Trim (−) | Connects to wiper of external 10kΩ potentiometer for fine offset adjustment; optional in most applications due to low inherent VOS. |
| 2 | Inverting Input (–IN) | Differential input node; protected by series resistors enabling safe operation 5V below ground. |
| 3 | Non-Inverting Input (+IN) | Differential input node; high common-mode rejection supports precision difference amplifier configurations. |
| 4 | V– (Negative Supply) | Ground reference for single-supply operation; supports V– = 0V with full functionality. |
| 5 | VOS Trim (+) | Connects to V+ side of external trim pot; matches industry-standard nulling topology for OP-07/LT1001 drop-in replacement. |
| 6 | Output (OUT) | Capable of sourcing/sinking ≥5mA; swings to within 6mV of ground while sinking - no pull-down required. |
| 7 | V+ (Positive Supply) | Accepts 2.2V to 18V single supply or ±15V dual supply; PSRR >100dB ensures stable operation across supply variations. |
| 8 | No Connect (NC) | Internally unused; must remain unconnected per datasheet - not tied to ground or supply. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower + Precision Coexistence | 60µA supply current with 40µV offset voltage - breaks traditional trade-off between low power and DC accuracy. |
| True Ground-Swing Output | All-NPN output stage sinks current to within 6mV of ground - eliminates power-wasting pull-down resistors in current-loop interfaces. |
| Input Overvoltage Protection | Series input resistors enable safe operation with inputs 5V below ground - prevents latch-up and destruction in transient-prone systems. |
| Phase Reversal Immunity | Internal protection circuit prevents output inversion when –IN falls >400mV below ground - critical for stability in servo and closed-loop control. |
| Plug-in Compatibility | Pinout and nulling terminals match OP-07, AD707, LT1001 - enables direct replacement with 30–60× power reduction and no PCB changes. |
Applications
| 4–20mA Current Loop Transmitter | Megaohm-Source Difference Amplifier |
|---|---|
Use Scenario: Converting 0–5V sensor output into industry-standard 4–20mA analog signal for PLC input over long cables. IC Role / Device Role / Timing Role: Precision current-source amplifier with programmable gain and offset; operates from same 24V loop supply. Use Value: 60µA quiescent current minimizes loop burden; rail-to-ground output enables accurate low-current (<4mA) detection and zero calibration. | Use Scenario: Amplifying differential voltage across high-value (1MΩ) source resistors in electrochemical or piezoresistive sensor interfaces. IC Role / Device Role / Timing Role: Low-input-bias-current difference amplifier with picoampere-level offset current (350pA max). Use Value: 350pA max offset current prevents significant voltage error across 1MΩ sources - preserves signal integrity without active guarding. |
| Battery-Powered Sensor Front-End | Self-Buffered Micropower Reference |
Use Scenario: Signal conditioning for remote environmental sensors powered by CR2032 coin cells with 10+ year lifetime requirements. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier stage with 5V operation and sub-100µA total system current. Use Value: 60µA supply current plus rail-to-ground output allows direct ADC interface without level-shifting - extends battery life by >5× vs. standard precision op amps. | Use Scenario: Generating stable 1.23V reference for ADCs or comparators in ultra-low-power IoT endpoints. IC Role / Device Role / Timing Role: Precision op amp configured as unity-gain buffer for LT1034 bandgap reference. Use Value: 40µV offset and 0.4µV/°C drift ensure buffered reference stays within ±1.2% over temperature - meets 12-bit ADC accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-07CP | Higher supply current (800µA), higher offset voltage (25µV typ but 150µV max), no ground-swing output - requires pull-down resistor. | Not suitable for battery-powered systems; limited to AC-coupled or dual-supply applications where power budget permits. | Select only when absolute lowest offset drift (<0.2µV/°C) is required and power is unconstrained. |
| AD707JRZ | 125µA supply current, 25µV max offset, 0.15V/µs slew rate, no ground-swing output - needs external pull-down for 0V output. | Compatible in dual-supply systems; unsuitable for single-supply 4–20mA loop transmitters requiring true ground sink. | Choose when higher speed (350kHz GBW) is needed and 2× LT1077IN8#PBF's supply current is acceptable. |
Compared with OP-07CP and AD707JRZ, the LT1077IN8#PBF delivers comparable DC precision at <1/10th the supply current and uniquely supports true ground-sinking output - making it the only viable option for micropower single-supply industrial analog signal chains.
Availability
LT1077IN8#PBF is available at Aetrix Electronics and suitable for battery-powered sensor nodes, 4–20mA current loop transmitters, and precision analog front-ends requiring stable component supply across extended production lifecycles.
Supply support for LT1077IN8#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 LT1077IN8#PBF belongs to Linear Technology's precision op amp product line, designed specifically for applications demanding micropower operation without compromising DC accuracy, noise, or output drive - targeting industrial, medical, and portable instrumentation.
FAQ
What is the minimum supply voltage for reliable operation of the LT1077IN8#PBF?
The LT1077IN8#PBF operates reliably down to 2.2V single supply (V+ = 2.2V, V– = 0V), with typical offset voltage shift of –300µV at this voltage. Full specifications are guaranteed from 2.3V, and the device remains functional even at 1.8V, though with degraded offset performance. This makes the LT1077IN8#PBF suitable for single-cell lithium or two-cell NiCd battery systems where voltage sags below 3V.
Does the LT1077IN8#PBF require external nulling components in precision applications?
No - the LT1077IN8#PBF features factory-trimmed input offset voltage (40µV max), eliminating the need for external nulling in most applications. Pins 1 and 5 are provided for optional fine adjustment using a 10kΩ potentiometer, matching the nulling topology of OP-07 and AD707 for drop-in replacement. However, due to its inherently low offset, nulling is typically unnecessary unless sub-10µV residual error is required.
Can the LT1077IN8#PBF drive capacitive loads without instability?
Yes - the LT1077IN8#PBF is stable with capacitive loads up to at least 20pF (tested), and exhibits 54° phase margin at 5V/0V supply. For larger loads (>100pF), a series isolation resistor (e.g., 100Ω) between output and capacitance is recommended. The internal compensation ensures robust small-signal transient response (10µs settling to 0.1%) and avoids peaking in closed-loop configurations commonly used in sensor signal chains.
How does the LT1077IN8#PBF handle input voltages below ground?
The LT1077IN8#PBF incorporates series input protection resistors that allow safe operation with inputs up to 5V below ground (V–) without damage or phase reversal. Unlike LM124 or OP-90, it features dedicated phase reversal immunity circuitry - verified to prevent output inversion even with –1.0V applied to –IN. This enables robust interfacing with transient-prone sensors and fault-tolerant industrial I/O without external clamping diodes.
Is the LT1077IN8#PBF pin-compatible with the OP-07 and AD707?
Yes - the LT1077IN8#PBF uses identical 8-pin DIP pinout and nulling terminal configuration (Pins 1 and 5) as OP-07, AD707, LT1001, and LT1012. It is explicitly documented as a "direct plug-in replacement" with full functional compatibility, including identical offset trimming methodology. No PCB layout changes are required when upgrading from these legacy precision op amps to the LT1077IN8#PBF.
LT1077IN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.12V/µs
- Gain Bandwidth Product:
- 230 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 nA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 56µA
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1077IN8#PBF FAQ
1.How can I place an order for LT1077IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1077IN8#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 LT1077IN8#PBF reliable?
The price and inventory of LT1077IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1077IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1077IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1077IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1077IN8#PBF?
LT1077IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1077IN8#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 LT1077IN8#PBF?
For technical support, including LT1077IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1077IN8#PBF requirements.
6.How does Aetrix verify that LT1077IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1077IN8#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 LT1077IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1077IN8#PBF?
All LT1077IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1077IN8#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 LT1077IN8#PBF part is unused and in its original packaging.
Return procedure for LT1077IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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