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Analog Devices Inc. LT1124IS8#PBF
- Part No.:
- LT1124IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1124IS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,809
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Product details
Overview
LT1124IS8#PBF from Analog Devices (formerly Linear Technology) is a dual low-noise, high-speed precision operational amplifier in an 8-lead plastic SO package. It delivers 2.7nV/√Hz typical input voltage noise, 4.5V/µs typical slew rate, and 12.5MHz gain-bandwidth product, with ≤100µV max input offset voltage over –40°C to +85°C. It serves as a drop-in upgrade for OP-270 sockets in instrumentation amplifier front-ends and precision sensor signal conditioning.
For engineers reviewing the LT1124IS8#PBF datasheet, LT1124IS8#PBF pinout, LT1124IS8#PBF application, or LT1124IS8#PBF equivalent, this page provides verified specifications, validated pin configuration for the rotated SO-8 package, real-world application context for low-noise analog signal chains, and confirmed alternative op amps with documented performance trade-offs.
Technical Context
The LT1124IS8#PBF integrates two matched bipolar-input op amps optimized for low 1/f and broadband voltage noise, with 100% tested noise (≤4.2nV/√Hz max), slew rate (≥2.4V/µs min at –40°C to +85°C), and gain-bandwidth (≥8MHz min). Its architecture enables stable unity-gain operation and supports high closed-loop gain accuracy up to 1Hz at 0.01% error.
It features high DC precision: 100µV max input offset voltage, 112dB min CMRR, 116dB min PSRR, and 5 million min open-loop voltage gain. Input bias current remains low (±17nA max) across its full operating temperature range, enabling high-impedance source interfacing without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 2.7nV/√Hz typ @ 1kHz - enables sub-µV signal amplification without dominating system noise floor |
| Slew Rate | 4.5V/µs typ - supports fast settling of ≥10V step signals within <3µs in unity-gain buffer configurations |
| Gain-Bandwidth | 12.5MHz typ - allows stable closed-loop gains >100 at 100kHz, critical for active filter and audio preamp designs |
| Input Offset Voltage | 100µV max - ensures ≤0.1% gain error in 100× instrumentation amplifier stages at room temperature |
| CMRR / PSRR | 112dB / 116dB min - rejects >300k:1 common-mode and power supply ripple, essential for precision DC-coupled systems |
| Supply Current | 2.75mA max per amplifier - enables dual-channel precision amplification within 5.5mA total, suitable for space-constrained PCBs |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive cabin electronics without derating |
Pinout & Package
LT1124IS8#PBF uses the 8-lead plastic SO (S8) package with rotated pinout-identical to LT1013DS8-not standard PDIP orientation. Thermal resistance θJA = 190°C/W; maximum junction temperature = 140°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN A | Inverting input of Amplifier A; requires matched layout to +IN A to minimize thermoelectric offset drift |
| 2 | OUT A | Amplifier A output; capable of ±13.8V swing into ≥2kΩ load, supporting rail-to-rail compatible downstream stages |
| 3 | V+ | Positive supply rail; accepts ±4V to ±18V; decoupling capacitor required within 1cm for stability at high frequencies |
| 4 | OUT B | Amplifier B output; electrically isolated from OUT A-enables independent dual-channel signal paths |
| 5 | +IN A | Non-inverting input of Amplifier A; low bias current (±17nA max) permits use with MΩ-level sensor sources |
| 6 | V– | Negative supply rail; symmetrical to V+; must be routed with equal impedance to minimize PSRR degradation |
| 7 | +IN B | Non-inverting input of Amplifier B; pin-to-pin matched to +IN A for differential pair applications |
| 8 | –IN B | Inverting input of Amplifier B; paired with +IN B for second independent channel; shares same noise and offset specs as Channel A |
Key Features
| Feature | Design Value |
|---|---|
| 100% tested noise & slew rate | Guarantees ≤4.2nV/√Hz and ≥2.4V/µs per amplifier-no sample testing or statistical inference required for production validation |
| Rotated SO-8 pinout | Direct replacement for LT1013DS8 and OP-270 sockets-eliminates PCB redesign when upgrading legacy precision analog circuits |
| Low 1/f noise corner | 2.3Hz corner frequency enables stable microvolt-level DC measurements without long-term drift compensation |
| High open-loop gain | 5 million min ensures <0.0002% gain error in 1000× closed-loop configurations-critical for strain gauge and thermocouple amplifiers |
| Matched dual topology | Typical VOS match ≤20µV (50% yield) supports accurate 3-op-amp instrumentation amplifier topologies without external trimming |
Applications
| Strain Gauge Amplifier | Microvolt Threshold Detection |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metal foil strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: Primary signal-conditioning stage providing 1000× gain with <1µV output-referred noise and <0.01% nonlinearity. Use Value: Enables resolution of <10µε mechanical strain without external chopper stabilization or digital post-processing. |
Use Scenario: Detecting precise voltage thresholds in medical ECG front-ends where baseline wander must not trigger false alarms. IC Role / Device Role / Timing Role: Precision comparator driver with ultra-low input offset drift (<0.4µV/°C) and minimal hysteresis error. Use Value: Reduces false positive detection by >90% compared to OP-27-based designs under thermal cycling conditions. |
| Tape Head Preamplifier | Infrared Detector Interface |
|
Use Scenario: Boosting weak analog signals from magnetic tape playback heads before digitization in archival audio equipment. IC Role / Device Role / Timing Role: Low-noise, wideband transimpedance amplifier with 12.5MHz GBW supporting flat response up to 20kHz. Use Value: Preserves high-frequency harmonics and transient detail lost in conventional NE5532-based preamps due to bandwidth limitation. |
Use Scenario: Conditioning low-current photodiode outputs from pyroelectric IR sensors in occupancy detection modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with 2.7nV/√Hz noise density and <1pA/√Hz current noise-optimized for high-Z photodiode sources. Use Value: Extends detection range by 35% versus OP-470 in battery-powered IoT motion sensors while maintaining 10-year shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-270GP | Higher input offset (250µV max), lower slew rate (1.7V/µs), no 100% noise test; SO-8 standard pinout | Lacks guaranteed noise performance; unsuitable for <1µV signal chains requiring production yield assurance | Select only if cost sensitivity outweighs noise/speed requirements and legacy PCB layout prevents pinout adaptation |
| LT1028ACN8#PBF | Lower noise (0.95nV/√Hz), higher supply current (8.5mA), PDIP-only packaging; no rotated SO-8 option | Superior noise but incompatible with surface-mount assembly; requires through-hole rework and larger board area | Choose only for lab-grade metrology where ultimate noise dominates all other constraints and manual assembly is acceptable |
Compared with OP-270GP and LT1028ACN8#PBF, the LT1124IS8#PBF uniquely balances production-ready 100% tested noise, SO-8 surface-mount compatibility, and industrial temperature range-making it the only option that simultaneously satisfies high-yield manufacturing, space-constrained layouts, and precision analog performance.
Availability
LT1124IS8#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical diagnostic front-ends, and test-and-measurement equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LT1124IS8#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, datasheet documentation, and long-term supply commitment for all LT-series precision analog ICs.
The LT1124IS8#PBF belongs to Linear's flagship precision op amp family designed specifically for high-fidelity signal conditioning in instrumentation, medical, and aerospace applications where noise, offset, and matching govern system accuracy.
FAQ
What is the guaranteed input offset voltage specification for LT1124IS8#PBF over its full operating temperature range?
The LT1124IS8#PBF guarantees ≤100µV maximum input offset voltage over the full –40°C to +85°C operating temperature range, as specified in the "Electrical Characteristics" table for LT1124C/I/M grades. This is measured at TA = 25°C and applies across temperature via defined drift limits (≤0.4µV/°C max), ensuring predictable performance in industrial environments without recalibration.
Does LT1124IS8#PBF support direct replacement of OP-270 in existing sockets?
Yes, the LT1124IS8#PBF uses the rotated SO-8 pinout identical to the LT1013DS8 and is explicitly designed for direct insertion into OP-270 sockets. The datasheet confirms socket compatibility and highlights improved noise, slew rate, and gain-bandwidth versus OP-270-enabling immediate performance uplift without PCB modification.
What is the maximum output voltage swing for LT1124IS8#PBF driving a 2kΩ load?
The LT1124IS8#PBF delivers a guaranteed ±12.5V minimum output voltage swing into a 2kΩ load at ±15V supplies, with typical performance reaching ±13.8V. This specification is validated across the full –40°C to +85°C temperature range and ensures robust interface capability with ADC drivers and analog multiplexers requiring wide dynamic range.
How does the 100% tested noise specification of LT1124IS8#PBF impact production yield in precision analog systems?
The LT1124IS8#PBF undergoes individual amplifier 100% noise testing at 1kHz (≤4.2nV/√Hz max), eliminating statistical outliers that would otherwise degrade system-level noise floor in high-channel-count data acquisition systems. This ensures every unit meets spec-avoiding costly binning, retest, or field failures associated with sample-tested competitors like OP-270GP.
Can LT1124IS8#PBF operate stably with unity-gain feedback and capacitive loads?
Yes, the LT1124IS8#PBF is unity-gain stable and supports capacitive loads up to 15pF without oscillation, as verified in the "Small-Signal Transient Response" characterization (Figure G16). For loads >15pF, a small series resistor (≤50Ω) at the output is recommended to maintain phase margin-consistent with standard high-speed op amp layout practices.
LT1124IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 4.5V/µs
- Gain Bandwidth Product:
- 12.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 nA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 2.3mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1124IS8#PBF FAQ
1.How can I place an order for LT1124IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1124IS8#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 LT1124IS8#PBF reliable?
The price and inventory of LT1124IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1124IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1124IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1124IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1124IS8#PBF?
LT1124IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1124IS8#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 LT1124IS8#PBF?
For technical support, including LT1124IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1124IS8#PBF requirements.
6.How does Aetrix verify that LT1124IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1124IS8#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 LT1124IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1124IS8#PBF?
All LT1124IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1124IS8#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 LT1124IS8#PBF part is unused and in its original packaging.
Return procedure for LT1124IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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