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Analog Devices Inc. LT1677CN8#PBF
- Part No.:
- LT1677CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1677CN8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:393
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Product details
Overview
LT1677CN8#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 preamps, strain gauge interfaces, and infrared detector front-ends.
For engineers reviewing the LT1677CN8#PBF datasheet, LT1677CN8#PBF pinout, LT1677CN8#PBF application, or LT1677CN8#PBF equivalent, key selection criteria include verified 100mV beyond-rail input common-mode range, guaranteed 90nVP-P 0.1Hz–10Hz noise, rail-to-rail output swing within 130mV of rails at 10mA, and N8 (8-lead PDIP) package compatibility with legacy OP-07/OP-27 sockets.
Technical Context
The LT1677CN8#PBF employs a proprietary bipolar input stage biased at 100µA to achieve ultra-low voltage noise while maintaining rail-to-rail input operation across ±15V supplies. Its input stage avoids phase reversal when VCM exceeds either supply by ≥100mV, and its output stage delivers symmetrical sourcing/sinking capability up to 10mA with <250mV headroom at full load.
It features a 13Hz 1/f noise corner, 109dB min CMRR over –13.3V to +14V common-mode range, and 108dB min PSRR - all specified across –40°C to +85°C. The device's large-signal voltage gain exceeds 7V/µV into 10kΩ, supporting microvolt-level threshold detection without external gain staging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 3.2nV/√Hz typ at 1kHz - enables resolution of sub-µV signals in audio and sensor front-ends |
| Input Offset Voltage | 60µV max - supports direct-coupled DC precision amplification without nulling circuitry |
| Offset Drift | 0.2µV/°C typ - ensures stable calibration over industrial temperature range |
| Gain Bandwidth | 7.2MHz - allows stable unity-gain buffering of 100kHz signals with >60° phase margin |
| Slew Rate | 2.5V/µs - supports clean 10V step response in <3.5µs at 0.01% settling |
| Supply Range | ±1.5V to ±18V - compatible with battery-powered (3V) and industrial (±15V) systems |
| Output Swing | Within 130mV of rails at 10mA - preserves dynamic range in rail-to-rail signal chains |
Pinout & Package
N8 package: 8-lead plastic DIP, through-hole mounting, 0.3" wide body, 0.1" lead pitch. Thermal resistance θJA = 150°C/W. RoHS-compliant lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS Trim | Connects to external 10kΩ potentiometer for fine offset adjustment without degrading drift performance |
| 2 | Inverting Input (–IN) | Differential input node; accepts common-mode voltages up to 100mV beyond either supply rail |
| 3 | Noninverting Input (+IN) | Differential input node; matched to Pin 2 for optimal CMRR and offset rejection |
| 4 | –VS | Negative supply terminal; supports operation down to –18V; must be decoupled locally |
| 5 | NC | No connect - internal die pad; leave unconnected per datasheet |
| 6 | Output (OUT) | Class AB output stage; drives 10mA load while maintaining rail-to-rail swing and low distortion |
| 7 | +VS | Positive supply terminal; supports operation up to +18V; requires local 0.1µF ceramic bypass |
| 8 | VOS Trim | Second trim terminal; used with Pin 1 for balanced offset nulling configuration |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond supply rails | Accepts VCM from –15.1V to +15.1V on ±15V supplies - eliminates level-shifting in high-dynamic-range sensors |
| Ultra-low 1/f noise corner | 13Hz corner frequency - minimizes low-frequency drift in DC-coupled instrumentation |
| Guaranteed noise performance | 100% tested 3.2nV/√Hz at 1kHz - ensures consistent signal integrity in production audio circuits |
| High open-loop gain | 7V/µV min into 10kΩ - enables accurate closed-loop gain control with minimal error contribution |
| Phase-reversal immunity | No output inversion when VCM exceeds rails - prevents latch-up in servo feedback loops |
Applications
| Electret Microphone Preamplifier | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level AC-coupled output from Panasonic WM-61 electret capsule in portable voice recorders. IC Role / Device Role / Timing Role: First-stage transimpedance and gain amplifier with rail-to-rail output driving ADC input. Use Value: 3.2nV/√Hz noise floor preserves SNR of 60dB+ microphone signals without requiring additional gain stages. | Use Scenario: Reading mV-level differential output from 350Ω foil strain gauges in load-cell-based industrial scales. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with 60µV offset enabling 0.01% full-scale accuracy. Use Value: 0.2µV/°C drift ensures calibration stability over –40°C to +85°C ambient without active compensation. |
| Infrared Detector Interface | Battery-Powered Sensor Node |
Use Scenario: Amplifying slow-varying photodiode current from thermopile IR sensors in occupancy detectors. IC Role / Device Role / Timing Role: Low-drift, low-noise transimpedance amplifier with DC-coupled output for microcontroller ADC sampling. Use Value: 90nVP-P 0.1Hz–10Hz noise enables reliable detection of <100µV IR signal changes at room temperature. | Use Scenario: Signal conditioning in coin-cell-powered environmental sensors with 3V supply and 10-year battery life target. IC Role / Device Role / Timing Role: Single-supply rail-to-rail op amp operating from 2.7V to 3.6V, minimizing quiescent current impact. Use Value: 3.4mA max supply current at 3V enables >5-year operation in 20µA average-current IoT nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1677CS8#PBF | Same silicon, SO-8 package; 190°C/W θJA; no VOS trim pins | Surface-mount PCB layout; no manual offset trimming capability | Select for automated assembly where board space and thermal performance outweigh trim flexibility |
| AD8628ARZ | Zero-drift architecture; 0.1µV/°C max drift; 4.2nV/√Hz noise; 2.5MHz GBW | Ultra-stable DC performance required; lower bandwidth acceptable | Select when long-term DC accuracy dominates over wideband noise performance |
Compared with LT1677CS8#PBF, the LT1677CN8#PBF provides accessible offset trim pins and superior thermal dissipation in through-hole prototyping; compared with AD8628ARZ, it offers 2.9× higher bandwidth and 25% lower voltage noise at the cost of higher drift - making it preferable for AC-coupled sensor interfaces above 10kHz.
Availability
LT1677CN8#PBF is available at Aetrix Electronics and suitable for electret microphone preamplifiers, strain gauge signal conditioners, and infrared detector interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1677CN8#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 continuity, documentation, and manufacturing for the LT1677 family.
The LT1677 series was designed specifically for high-fidelity, low-noise analog signal paths in precision instrumentation - combining rail-to-rail operation with microvolt-level DC accuracy and sub-4nV/√Hz noise performance.
FAQ
What is the maximum supply voltage rating for the LT1677CN8#PBF?
The LT1677CN8#PBF has an absolute maximum supply voltage rating of ±22V. However, its specified operating range is ±1.5V to ±18V. Operation at ±22V is not recommended for long-term reliability. All electrical characteristics in the datasheet - including noise, offset, and gain - are validated within the ±18V limit, and the LT1677CN8#PBF must be operated within this range to guarantee performance compliance.
Does the LT1677CN8#PBF support true rail-to-rail input beyond the supply rails?
Yes, the LT1677CN8#PBF supports input common-mode voltage up to 100mV beyond either supply rail - e.g., –15.1V to +15.1V on ±15V supplies. This is explicitly confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. The LT1677CN8#PBF achieves this via internal biasing that prevents phase reversal and maintains linear operation, making it suitable for direct connection to overvoltage-safe sensor outputs without external clamping.
What is the guaranteed 0.1Hz to 10Hz noise specification for the LT1677CN8#PBF?
The LT1677CN8#PBF is guaranteed to deliver ≤90nVP-P peak-to-peak noise over the 0.1Hz to 10Hz band under standard test conditions (±15V supplies, VCM = 0V). This value is 100% tested during production and appears in the Electrical Characteristics table. The LT1677CN8#PBF achieves this performance through optimized input stage biasing and low-1/f-corner design, critical for DC-coupled precision measurement applications.
Can the LT1677CN8#PBF replace OP-07 or OP-27 in existing sockets?
Yes, the LT1677CN8#PBF is pin-compatible with OP-07 and OP-27 in 8-lead DIP sockets and can be inserted directly without modifying external compensation or nulling components. Its N8 package matches the footprint and lead spacing of those legacy devices. The LT1677CN8#PBF also offers improved noise, wider supply range, and rail-to-rail operation - delivering immediate performance upgrades in retrofitted designs.
What is the purpose of Pins 1 and 8 on the LT1677CN8#PBF?
Pins 1 and 8 on the LT1677CN8#PBF are dedicated VOS trim terminals for external offset nulling using a 10kΩ potentiometer. Unlike many op amps, trimming the LT1677CN8#PBF does not degrade its temperature drift - the datasheet confirms that adjusting VOS to 300µV adds only 1µV/°C drift. These pins enable precise DC calibration in applications demanding microvolt-level accuracy, such as precision weigh scales or medical sensor front-ends.
LT1677CN8#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1677CN8#PBF FAQ
1.How can I place an order for LT1677CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1677CN8#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 LT1677CN8#PBF reliable?
The price and inventory of LT1677CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1677CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1677CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1677CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1677CN8#PBF?
LT1677CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1677CN8#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 LT1677CN8#PBF?
For technical support, including LT1677CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1677CN8#PBF requirements.
6.How does Aetrix verify that LT1677CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1677CN8#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 LT1677CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1677CN8#PBF?
All LT1677CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1677CN8#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 LT1677CN8#PBF part is unused and in its original packaging.
Return procedure for LT1677CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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