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Analog Devices Inc. LT1124CN8#PBF
- Part No.:
- LT1124CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1124CN8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:397
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Product details
Overview
LT1124CN8#PBF from Analog Devices (formerly Linear Technology) is a dual low-noise, high-speed precision operational amplifier in an 8-lead PDIP package. It delivers 2.7nV/√Hz typical input voltage noise, 4.5V/µs slew rate, and 12.5MHz gain-bandwidth product, with 100µV max input offset voltage and 112dB min CMRR. It is used in microvolt-accuracy threshold detection and strain gauge amplifiers where low noise and high DC precision are critical.
For engineers reviewing the LT1124CN8#PBF datasheet, LT1124CN8#PBF pinout, LT1124CN8#PBF application, or LT1124CN8#PBF equivalent, this page provides verified specifications, validated PDIP pin mapping, real-world use cases in instrumentation and audio, and confirmed alternative op amps for design flexibility and supply continuity.
Technical Context
The LT1124CN8#PBF implements a bipolar input stage optimized for low 1/f and broadband voltage noise, with 100% tested noise per amplifier at 1kHz. Its architecture achieves high open-loop gain (5 million min) and exceptional PSRR (116dB min) without sacrificing speed-enabling stable unity-gain buffer operation and precise active filtering up to 100kHz.
It features matched internal transistor pairs for consistent channel-to-channel performance, supports ±22V absolute maximum supply, and operates across 0°C to 70°C. Input protection diodes allow robust handling of overvoltage transients, while the PDIP package enables through-hole prototyping and legacy system upgrades.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 2.7nV/√Hz typ @ 1kHz - enables sub-µV signal resolution in sensor front-ends |
| Slew Rate | 4.5V/µs typ - supports clean 100kHz full-scale output swings in fast-settling circuits |
| GBW Product | 12.5MHz typ - allows stable closed-loop gain ≥100 up to 100kHz |
| Input Offset | 100µV max - ensures ≤0.1% gain error in 100mV full-scale instrumentation amplifiers |
| CMRR | 112dB min - rejects >300k:1 common-mode interference in bridge-based sensors |
| Supply Current | 2.75mA max per amp - enables dual-amplifier operation within 6mA total budget |
| PSRR | 116dB min - suppresses power rail ripple to <100nV/V at ±15V supplies |
Pinout & Package
LT1124CN8#PBF uses the standard 8-lead PDIP (N8) package with 0.300-inch width, compatible with through-hole PCB assembly and socket-based evaluation. Pin 1 is marked by a beveled edge or dimple per JEDEC MS-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads ≥2kΩ with ±13V swing |
| 2 | –IN A | Inverting input A - high-impedance node for feedback networks |
| 3 | +IN A | Non-inverting input A - referenced to ground or common-mode bias |
| 4 | V– | Negative supply rail - accepts –22V max; must be decoupled locally |
| 5 | V+ | Positive supply rail - accepts +22V max; requires 0.1µF ceramic bypass |
| 6 | +IN B | Non-inverting input B - electrically isolated from Channel A |
| 7 | –IN B | Inverting input B - supports independent feedback configuration |
| 8 | OUT B | Amplifier B output - fully independent, no crosstalk above 130dB @ 10Hz |
Key Features
| Feature | Design Value |
|---|---|
| 100% tested noise per amplifier | Guarantees ≤4.2nV/√Hz for each channel - eliminates batch-level uncertainty in low-level signal chains |
| Dual-channel matching | ≤100µV VOS mismatch (98% yield) - enables precision two-op-amp instrumentation topologies |
| Bipolar input stage | Low 0.3pA/√Hz current noise - preserves SNR in high-source-impedance photodiode or piezo applications |
| High PSRR/CMRR | 116dB PSRR + 112dB CMRR - maintains accuracy in noisy industrial power environments |
| Robust input protection | Back-to-back diodes without series resistors - preserves low-noise performance while surviving ±25mA differential faults |
Applications
| Strain Gauge Amplifier | Microvolt Threshold Detector |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in industrial weighing systems. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in first-stage gain block with 1000× non-inverting configuration. Use Value: 2.7nV/√Hz noise and 100µV VOS enable resolution of <10µV bridge imbalances, supporting 16-bit effective ENOB. | Use Scenario: Detecting minute voltage deviations in battery cell monitoring or medical ECG baseline drift. IC Role / Device Role / Timing Role: Precision comparator front-end with hysteresis set by LT1124CN8#PBF's low drift and high gain. Use Value: 0.3µV/°C typical VOS drift ensures stable 50µV thresholds over 0–70°C, eliminating recalibration. |
| Tape Head Preamplifier | Infrared Detector Interface |
Use Scenario: Boosting weak analog signals from magnetic tape playback heads before ADC sampling. IC Role / Device Role / Timing Role: Low-noise, wideband gain stage operating at AV = 100 with 20kHz bandwidth. Use Value: 12.5MHz GBW and 4.5V/µs slew rate support flat 20kHz response with <0.001% THD+N at 1Vrms. | Use Scenario: Amplifying picoamp-level photocurrent from cooled InSb or HgCdTe IR detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10MΩ feedback resistor and guarded input layout. Use Value: 0.3pA/√Hz current noise and 112dB CMRR reject ambient EMI in unshielded IR optical benches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-27GP | Higher 4.5nV/√Hz noise (sample-tested), lower 1.7V/µs slew rate, no 100% noise test per channel | Less suitable for >50kHz precision AC-coupled signal chains requiring guaranteed noise floor | Select OP-27GP only when cost sensitivity outweighs need for guaranteed low-noise performance and higher speed |
| LT1028ACN8#PBF | Lower 0.95nV/√Hz noise but higher 3.5mA supply current; single-channel only; same N8 package | Requires two devices for dual-channel designs, increasing board area and BOM count | Choose LT1028ACN8#PBF when ultimate voltage noise dominates over channel count and power constraints |
Compared with OP-27GP and LT1028ACN8#PBF, the LT1124CN8#PBF uniquely balances dual-channel integration, 100% per-amplifier noise validation, and 4.5V/µs speed in a legacy-compatible PDIP package-making it optimal for upgrading existing dual-op-amp instrumentation without layout changes.
Availability
LT1124CN8#PBF is available at Aetrix Electronics and suitable for strain gauge amplification, microvolt threshold detection, tape head preamplification, and infrared detector interfacing requiring stable component supply and long-term obsolescence management.
Supply support for LT1124CN8#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 technical and manufacturing continuity for legacy Linear op amps including the LT1124 family.
The LT1124 product line was designed specifically for high-precision, low-noise analog signal conditioning in test equipment, medical instruments, and industrial measurement systems where dual-channel matching and guaranteed noise performance are mandatory.
FAQ
What is the maximum operating temperature range for LT1124CN8#PBF?
The LT1124CN8#PBF is specified for operation from 0°C to 70°C. This commercial-grade temperature range is clearly defined in the Order Information table and applies to all N8-package variants with 'C' suffix. It does not support extended industrial or military ranges unless explicitly marked with 'I', 'A', or 'M' grade suffixes.
Does LT1124CN8#PBF have the same pinout as the OP-270?
No, the LT1124CN8#PBF uses the standard dual-op-amp PDIP pinout (OUT A, –IN A, +IN A, V–, V+, +IN B, –IN B, OUT B), whereas the OP-270 is a quad op amp in 14-pin packages. However, the LT1124CN8#PBF is pin-compatible with the OP-270's dual-section footprint when used in socket adapters or discrete dual-channel layouts.
Is LT1124CN8#PBF RoHS compliant and lead-free?
Yes, LT1124CN8#PBF carries the '#PBF' suffix, indicating it is manufactured with 100% matte tin lead finish and complies with RoHS Directive 2011/65/EU. The part marking 'LT1124CN8' and packaging documentation confirm full lead-free compliance without exemptions.
Can LT1124CN8#PBF drive a 600Ω audio load directly?
No, LT1124CN8#PBF is not optimized for low-impedance audio line driving. Its output stage is rated for ≥2kΩ loads per the Electrical Characteristics table. Driving 600Ω risks excessive distortion and thermal stress; a dedicated audio line driver like the LT1364 should be used downstream if required.
How is the 100% noise testing implemented for LT1124CN8#PBF?
Each amplifier inside the LT1124CN8#PBF undergoes individual 1kHz voltage noise measurement during final test. This guarantees ≤4.2nV/√Hz for both channels - a key differentiator from sample-tested competitors like the OP-270. The test method follows Linear Technology's proprietary low-frequency noise characterization protocol, documented in the Applications Information section.
LT1124CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1124CN8#PBF FAQ
1.How can I place an order for LT1124CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1124CN8#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 LT1124CN8#PBF reliable?
The price and inventory of LT1124CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1124CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1124CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1124CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1124CN8#PBF?
LT1124CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1124CN8#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 LT1124CN8#PBF?
For technical support, including LT1124CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1124CN8#PBF requirements.
6.How does Aetrix verify that LT1124CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1124CN8#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 LT1124CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1124CN8#PBF?
All LT1124CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1124CN8#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 LT1124CN8#PBF part is unused and in its original packaging.
Return procedure for LT1124CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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