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Analog Devices Inc. LT1077ACN8#PBF
- Part No.:
- LT1077ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1077ACN8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:130
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Product details
Overview
LT1077ACN8#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, 0.5µVP-P (0.1Hz–10Hz) voltage noise, 250kHz gain-bandwidth product, and rail-to-ground output swing while sinking current-enabling use in battery-powered sensor front-ends and 4–20mA current-loop transmitters.
For engineers reviewing the LT1077ACN8#PBF datasheet, LT1077ACN8#PBF pinout, LT1077ACN8#PBF application, or LT1077ACN8#PBF equivalent, key selection criteria include micropower precision trade-offs, single-supply input range extending below ground, output stage capability to sink 5mA without pull-down resistors, and direct replacement compatibility with OP-07/AD707 in legacy designs requiring >30× power reduction.
Technical Context
The LT1077ACN8#PBF employs an all-NPN output stage enabling true ground-swing capability when sinking current, eliminating need for external pull-down resistors-a critical advantage over competing micropower op amps like OP-90 or LM4250. Its input stage integrates series protection resistors allowing safe operation with inputs up to 5V below ground without phase reversal or latch-up.
Offset voltage is internally trimmed at 5V/0V supply conditions, achieving the lowest VOS of any micropower op amp (≤40µV max), while maintaining 0.4µV/°C drift and 94–105dB CMRR across 0°C to 70°C. Noise performance is optimized with 0.7Hz 1/f corner, yielding ultra-low 0.1Hz–10Hz voltage noise (0.5µVP-P) unattainable at comparable supply currents.
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., strain gauge bridges) without nulling circuitry. |
| Voltage Noise (0.1–10Hz) | 0.5µVP-P - ensures sub-µV signal integrity in low-frequency precision measurement (<10Hz bandwidth). |
| Gain-Bandwidth Product | 250kHz - sufficient for anti-aliasing filters, active RC stages, and moderate-speed control loops. |
| Output Swing (Sinking) | ≤7mV above ground (no load) - eliminates need for pull-down resistors in single-supply difference amplifiers. |
| Input Offset Drift | 0.4µV/°C max - maintains calibration stability over industrial temperature range (0°C to 70°C). |
| Common-Mode Range | Extends 0.3V below V– (ground) - accommodates transient undershoot and bipolar sensor outputs in 5V systems. |
Pinout & Package
N8 package: 8-lead PDIP (Plastic Dual In-line Package), 0.300-inch width, JEDEC MS-001 compliant, operating temperature range 0°C to 70°C, θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | VOS Trim | Connect 10kΩ potentiometer wiper to V+ for manual offset nulling; compatible with OP-07/AD707 trimming networks. |
| 2 | Inverting Input (–IN) | Differential input node; protected by series resistors enabling –5V safe input voltage (below ground). |
| 3 | Non-Inverting Input (+IN) | Differential input node; same protection and common-mode range as Pin 2. |
| 4 | V– | Negative supply terminal; tied to ground in single-supply configurations. |
| 5 | NC | No internal connection; leave unconnected per datasheet. |
| 6 | Output (OUT) | Class-AB output stage capable of sourcing/sinking ±5mA; swings to within 7mV of ground while sinking. |
| 7 | V+ | Positive supply terminal; operates from 2.2V to 18V (single supply) or ±2.2V to ±18V (dual supply). |
Key Features
| Feature | Design Value |
|---|---|
| Self-buffered micropower reference | Integrated 1.23V reference (via LT1034 co-design) enables precision current-source biasing without external references. |
| Phase reversal protection | Prevents output inversion during input transients < –400mV, avoiding servo lock-up in closed-loop systems. |
| Ground-swing output stage | All-NPN topology sinks current to within 7mV of ground-eliminates 10–100µA pull-down resistor current in 4–20mA loop drivers. |
| Ultra-low 1/f noise corner | 0.7Hz corner frequency delivers 0.5µVP-P (0.1–10Hz) noise-critical for thermocouple, RTD, and pH sensor front-ends. |
| Plug-in replacement for legacy precision op amps | Pins 1/8 trim, same footprint, and identical nulling method enable drop-in upgrade from OP-07/AD707 with 30–60× lower IQ. |
Applications
| High-Impedance Sensor Amplifier | 4–20mA Current Loop Transmitter |
|---|---|
Use Scenario: Amplifying output of 1MΩ source-resistance sensors (e.g., pH electrodes, piezoresistive pressure elements) where input bias current must be <100pA to avoid signal error. IC Role / Device Role / Timing Role: Precision difference amplifier with picoampere input offset current (350pA max) and megaohm input resistance preserves signal integrity. Use Value: Enables direct interfacing to high-Z sources without guard rings or T-networks, reducing PCB area and component count by 30% vs. OP-90-based solutions. | Use Scenario: Converting 0–5V process control signals into industry-standard 4–20mA analog output for PLCs and DCS systems. IC Role / Device Role / Timing Role: Single-supply op amp driving current-sense resistor in two-terminal current source topology with LT1034 reference. Use Value: 60µA supply current allows full 4–20mA loop compliance while consuming <0.3mW-enabling intrinsically safe field transmitter designs. |
| Battery-Powered Data Logger | Micropower Comparator with TTL Output |
Use Scenario: Multi-channel analog front-end in portable environmental monitors powered by CR2032 coin cells with 10-year target lifetime. IC Role / Device Role / Timing Role: Signal conditioning amplifier for thermistor/RTD inputs, operating continuously at 5V single supply with ground-referenced output. Use Value: 60µA quiescent current extends battery life to >8 years at 1Hz sampling, exceeding LPWAN node requirements without duty cycling. | Use Scenario: Threshold detection in solar charge controllers where comparator must drive TTL logic while drawing <100µA from 3.3V rail. IC Role / Device Role / Timing Role: Precision op amp configured as comparator with rail-to-ground output swing and <200µs response to 2mV overdrive. Use Value: Eliminates level-shifting circuitry needed for OP-07 comparators, reducing BOM cost by $0.18/unit and board space by 25mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-07CP | Higher supply current (800µA), 60µV VOS, no ground-swing output - requires pull-down resistor for single-supply use. | Legacy industrial instrumentation where power is not constrained but pin compatibility is required. | Select only if existing PCB layout mandates exact OP-07 footprint and thermal design accommodates 13× higher dissipation. |
| AD707JRZ | 750µA IQ, 25µV VOS, 1.2µV/°C drift, no input protection below ground - susceptible to phase reversal. | High-precision lab equipment needing lowest possible offset but with dual-supply availability. | Choose when VOS <25µV is mandatory and system can tolerate 12× higher power and dual supplies. |
Compared with OP-07CP and AD707JRZ, the LT1077ACN8#PBF delivers 30–60× lower supply current while retaining ground-swing capability and phase reversal immunity-making it uniquely suitable for battery-powered, single-supply precision systems where both power and robustness are critical.
Availability
LT1077ACN8#PBF is available at Aetrix Electronics and suitable for battery-powered data loggers, 4–20mA current-loop transmitters, high-impedance sensor interfaces, and micropower comparator circuits requiring stable component supply across extended production lifecycles.
Supply support for LT1077ACN8#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 full production and technical support for legacy Linear precision analog products.
The LT1077 product line was designed specifically for micropower precision signal conditioning in single-supply, battery-operated systems-emphasizing ultra-low IQ, ground-swing output, and robust input protection without sacrificing DC accuracy.
FAQ
What is the maximum supply voltage range for LT1077ACN8#PBF?
The LT1077ACN8#PBF operates from a single supply of 2.2V to 18V (V+ to ground) or dual supplies of ±2.2V to ±18V. Absolute maximum ratings specify ±22V supply voltage and ±30V differential input voltage. Operation at 1.8V is possible but causes typical offset skew of –300µV, so 2.2V is the recommended minimum for specified performance.
Does LT1077ACN8#PBF require external nulling components?
The LT1077ACN8#PBF includes internal offset trimming optimized for 5V/0V operation, achieving ≤40µV max VOS without external components. Pins 1 and 8 support optional 10kΩ potentiometer connection to V+ for fine nulling-identical to OP-07/AD707, enabling drop-in replacement in legacy designs requiring tighter offset specs.
Can LT1077ACN8#PBF drive capacitive loads without instability?
Yes, the LT1077ACN8#PBF is stable with capacitive loads up to 20pF when configured as unity-gain follower (AV = 1). For larger loads, isolation resistor (e.g., 100Ω) between output and capacitance is recommended. Phase margin remains >54° across temperature (–50°C to 125°C) with 20pF load, ensuring robust transient response in sensor buffering applications.
What is the input common-mode voltage range of LT1077ACN8#PBF?
The LT1077ACN8#PBF input common-mode range extends from 0.3V below V– (i.e., –0.3V with V– = 0V) to 0.3V below V+, enabling operation with inputs slightly negative relative to ground. This is enabled by internal series input protection resistors, allowing safe handling of –5V transients without phase reversal or damage-unlike LM124 or OP-90.
How does LT1077ACN8#PBF compare to LT1077CN8 in terms of specifications?
The LT1077ACN8#PBF and LT1077CN8 share identical N8 package and pinout, but differ in grade: LT1077ACN8#PBF is the "A" grade (0°C to 70°C), with tighter specs including 40µV max VOS and 0.4µV/°C max drift, while LT1077CN8 is "C" grade (same temp range) with 110µV max VOS and 1.6µV/°C max drift. Both use #PBF (lead-free) finish.
LT1077ACN8#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:
- 20 µV
- Current - Supply:
- 56µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1077ACN8#PBF FAQ
1.How can I place an order for LT1077ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1077ACN8#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 LT1077ACN8#PBF reliable?
The price and inventory of LT1077ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1077ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1077ACN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1077ACN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1077ACN8#PBF?
LT1077ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1077ACN8#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 LT1077ACN8#PBF?
For technical support, including LT1077ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1077ACN8#PBF requirements.
6.How does Aetrix verify that LT1077ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1077ACN8#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 LT1077ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1077ACN8#PBF?
All LT1077ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1077ACN8#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 LT1077ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1077ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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