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Analog Devices Inc. LT1677IN8#PBF
- Part No.:
- LT1677IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1677IN8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
LT1677IN8#PBF from Analog Devices (formerly Linear Technology) is a precision rail-to-rail input/output operational amplifier optimized for low-noise, high-accuracy signal conditioning in single- and dual-supply systems. It delivers 3.2nV/√Hz voltage noise at 1kHz, 60µV max input offset voltage, 0.2µV/°C typical drift, 7.2MHz gain bandwidth, and operates from ±1.5V to ±18V supplies - enabling use in electret microphone preamplifiers, strain gauge interfaces, and infrared detector front-ends.
For engineers reviewing the LT1677IN8#PBF datasheet, LT1677IN8#PBF pinout, LT1677IN8#PBF application, or LT1677IN8#PBF equivalent, this page provides verified package mapping (8-lead PDIP), confirmed rail-to-rail I/O behavior, validated noise performance across VCM range, real-world settling time (3.5µs to 0.01%), and precise alternative part comparisons with documented functional trade-offs.
Technical Context
The LT1677IN8#PBF employs a proprietary bipolar input stage biased at 100µA to achieve ultra-low 1/f and broadband voltage noise while maintaining rail-to-rail common-mode input range exceeding supplies by ≥100mV. Its architecture eliminates phase reversal during overdrive and supports stable unity-gain operation without external compensation.
It features matched PNP/NPN input pairs enabling wide VCM (–15.1V to +15.1V at ±15V supplies), 109dB min CMRR, 108dB min PSRR, and output swing within 110mV of rails at 0.1mA load - all specified over –40°C to +85°C industrial temperature range with full correlation testing across supply voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Noise Density | 3.2nV/√Hz typ @ 1kHz - enables sub-100nV RMS noise in audio-band circuits with <10kΩ source impedance |
| Input Offset Voltage | 60µV max @ –40°C to +85°C - ensures ≤100µV system error in µV-level threshold detection without trimming |
| Gain Bandwidth Product | 7.2MHz typ - supports stable closed-loop gain ≥100 up to 70kHz with <0.1% settling in 3.5µs |
| Slew Rate | 2.5V/µs typ - drives 2kΩ//15pF loads with <1% THD+N at 10kHz for direct-coupled audio stages |
| Supply Range | ±1.5V to ±18V - allows operation from single 3V battery to split ±15V lab supplies without redesign |
| CMRR / PSRR | 109dB / 108dB min - rejects >200,000:1 common-mode and power supply ripple in precision sensor bridges |
| Operating Temp | –40°C to +85°C - qualified for industrial embedded systems with no derating required |
Pinout & Package
LT1677IN8#PBF is housed in an 8-lead plastic DIP (PDIP) package (N8), with 0.300" body width, through-hole mounting, and JEDEC MS-001AC compliance. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS Trim | Connects to external 10kΩ potentiometer wiper for offset adjustment; does not degrade thermal drift when trimmed |
| 2 | Inverting Input (–IN) | Differential input node; accepts signals from –15.1V to +15.1V (beyond rails) with no phase reversal |
| 3 | Noninverting Input (+IN) | Differential input node; same rail-to-rail common-mode range as Pin 2 |
| 4 | –VS | Negative supply terminal; supports operation down to –1.5V (single-supply negative rail) |
| 5 | NC | No internal connection; electrically isolated; may be left unconnected or grounded for mechanical stability |
| 6 | Output (OUT) | Rail-to-rail output capable of sourcing/sinking 25mA; swings within 110mV of either rail at light loads |
| 7 | +VS | Positive supply terminal; supports operation up to +18V (or +36V total differential) |
| 8 | VOS Trim | Second trim terminal; used with Pin 1 to form balanced nulling network per datasheet Figure 2 |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond supplies | Accepts VCM = –15.1V to +15.1V on ±15V supplies - eliminates level-shifting in high-side current sensing |
| Ultra-low 1/f noise corner | 13Hz typical - reduces 0.1Hz–10Hz peak-to-peak noise to 90nV, critical for DC-coupled thermocouple amplifiers |
| Guaranteed low offset drift | 0.2µV/°C typical (N8 package) - maintains µV-level accuracy across industrial temperature range without recalibration |
| High open-loop gain | 7V/µV min (7 million) driving 10kΩ - ensures <1ppm gain error in 16-bit precision data acquisition front-ends |
| No external compensation needed | Stable at unity gain with capacitive loads ≤15pF - simplifies PCB layout and eliminates risk of oscillation in sensor interfaces |
Applications
| Electret Microphone Preamplifier | Strain Gauge Instrumentation Amplifier |
|---|---|
|
Use Scenario: Low-voltage, battery-powered condenser microphone signal conditioning with 20dB–40dB gain before ADC. IC Role / Device Role / Timing Role: First-stage transimpedance and gain amplifier; sets system noise floor and DC bias point. Use Value: 3.2nV/√Hz noise and rail-to-rail output enable >65dB SNR from 3V supply without AC coupling or gain staging. |
Use Scenario: Wheatstone bridge output amplification in load cell or pressure transducer with <100µV full-scale signal. IC Role / Device Role / Timing Role: Precision differential-to-single-ended converter with programmable gain. Use Value: 60µV max VOS and 0.2µV/°C drift ensure <0.01% FS error over –40°C to +85°C without calibration. |
| Infrared Detector Front-End | Direct-Coupled Audio Gain Stage |
|
Use Scenario: Amplifying low-level, slow-slew photodiode current from pyroelectric or thermopile IR sensors. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with DC-coupled output for microcontroller ADC input. Use Value: 90nVP-P (0.1Hz–10Hz) and rail-to-rail input allow detection of sub-µV signals without blocking capacitors or chopper stabilization. |
Use Scenario: Line-level audio buffering and gain control in portable audio equipment with single 3V–5V supply. IC Role / Device Role / Timing Role: Unity-gain buffer or noninverting amplifier with minimal THD+N and zero DC offset. Use Value: 0.0006% THD+N at 1kHz and 10VP-P, plus rail-to-rail output, eliminate coupling caps and preserve bass response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1792CS8#PBF | Lower current noise (0.1pA/√Hz), higher VOS (125µV max), SO-8 only | Better for high-Z sources (>100kΩ); unsuitable for low-VOS DC-coupled sensor amps | Select when source impedance >50kΩ dominates total noise; avoid for µV-level bridge amps |
| OPA211AIDR | Lower VOS drift (0.1µV/°C), higher supply current (3.6mA), no rail-to-rail input | Superior drift stability but limited VCM (to within 1.5V of rails); requires level shifters in high-side sensing | Choose for ultra-stable DC gain where rail-to-rail input is unnecessary and board space favors SOIC |
Compared with LT1677IN8#PBF, LT1792CS8#PBF trades voltage noise for current noise advantage above 50kΩ source impedances, while OPA211AIDR improves drift by 50% but sacrifices rail-to-rail input capability - making LT1677IN8#PBF uniquely balanced for general-purpose precision analog front-ends requiring both low noise and wide dynamic range.
Availability
LT1677IN8#PBF is available at Aetrix Electronics and suitable for electret microphone preamplifiers, strain gauge instrumentation, and infrared detector front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1677IN8#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 product support, qualification, and manufacturing continuity for the LT series precision op amps.
The LT1677 product line was designed specifically for high-fidelity, low-noise, rail-to-rail signal conditioning in industrial, medical, and test equipment where µV-level accuracy and nanovolt noise must coexist with wide supply flexibility.
FAQ
What is the maximum guaranteed input offset voltage for LT1677IN8#PBF over its full operating temperature range?
The LT1677IN8#PBF has a maximum input offset voltage of 60µV across the full –40°C to +85°C industrial temperature range, as tested and guaranteed per datasheet Section 5. This specification applies under standard conditions (VS = ±15V, VCM = 0V) and is distinct from the 20µV typical value measured at 25°C.
Does LT1677IN8#PBF support true rail-to-rail input operation beyond the supply rails?
Yes, LT1677IN8#PBF supports common-mode input voltages up to –15.1V and +15.1V when operated on ±15V supplies - exceeding both rails by at least 100mV. This is explicitly confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, enabling direct interface with overvoltage-safe sensors without external clamping.
What is the minimum recommended supply voltage for stable operation of LT1677IN8#PBF?
The LT1677IN8#PBF is fully specified and guaranteed for operation down to ±1.5V (3V total), with all key parameters - including noise, offset, CMRR, and output swing - validated at this minimum supply. Operation below ±1.5V is not characterized and may result in degraded performance or instability.
Can LT1677IN8#PBF drive capacitive loads without external isolation resistors?
LT1677IN8#PBF is stable driving capacitive loads up to 15pF directly at the output pin, as verified in the Typical Performance Characteristics (Figure G21). For loads >15pF, a small series resistor (typically 10Ω–50Ω) is recommended between the output and capacitance to maintain phase margin and prevent peaking or oscillation.
How does the LT1677IN8#PBF compare to OP-07 in terms of pin compatibility and performance upgrades?
LT1677IN8#PBF is pin-compatible with OP-07 in the 8-lead DIP package and can be dropped into existing OP-07 sockets without layout changes. It upgrades performance with rail-to-rail input/output, 3.2nV/√Hz vs OP-07's 10nV/√Hz noise, 7.2MHz GBW vs 0.6MHz, and 0.2µV/°C drift vs 0.3µV/°C - while maintaining similar quiescent current (3.5mA vs 1.2mA).
LT1677IN8#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:
- Rail-to-Rail
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- 7.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 2.75mA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1677IN8#PBF FAQ
1.How can I place an order for LT1677IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1677IN8#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 LT1677IN8#PBF reliable?
The price and inventory of LT1677IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1677IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1677IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1677IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1677IN8#PBF?
LT1677IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1677IN8#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 LT1677IN8#PBF?
For technical support, including LT1677IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1677IN8#PBF requirements.
6.How does Aetrix verify that LT1677IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1677IN8#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 LT1677IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1677IN8#PBF?
All LT1677IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1677IN8#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 LT1677IN8#PBF part is unused and in its original packaging.
Return procedure for LT1677IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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