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Analog Devices Inc. LT1124ACN8#PBF
- Part No.:
- LT1124ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1124ACN8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,483
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Product details
Overview
LT1124ACN8#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 at ±15V supply, with 70µV max input offset voltage (Prime Grade). It serves as a drop-in upgrade for OP-270 sockets in instrumentation amplifier front-ends and low-noise signal conditioning stages.
For engineers reviewing the LT1124ACN8#PBF datasheet, LT1124ACN8#PBF pinout, LT1124ACN8#PBF application, or LT1124ACN8#PBF equivalent, this page provides verified specifications, validated PDIP pin configuration, real-world use cases in microvolt-threshold detection and strain gauge amplification, and two confirmed alternative parts with documented parameter trade-offs.
Technical Context
The LT1124ACN8#PBF uses a bipolar input stage optimized for low 1/f and broadband voltage noise, with 100% tested noise per amplifier. Its architecture achieves high open-loop gain (5 million min) and exceptional PSRR (116dB min) and CMRR (112dB min), enabling stable DC-coupled operation in precision sensor interfaces.
It features matched internal transistor pairs across both amplifiers to support accurate differential gain configurations, and its 2.75mA max supply current per amplifier enables dual-channel performance at half the power of two discrete OP-27s - critical for space-constrained industrial analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.7nV/√Hz typ @ 1kHz - enables sub-µV signal resolution in audio preamps and IR detectors |
| Slew Rate | 4.5V/µs typ - supports clean 10Vpp output at ≥100kHz in unity-gain buffer applications |
| Gain-Bandwidth Product | 12.5MHz typ - allows stable closed-loop gain of 1000 up to 1Hz with <0.01% error |
| Input Offset Voltage | 70µV max (Prime Grade) - ensures ≤0.007% gain error in 1V full-scale instrumentation amplifiers |
| Common Mode Rejection | 112dB min - rejects >300µV of common-mode interference on 10V signals |
| Supply Current per Amp | 2.75mA max - enables dual-channel precision amplification within 5.5mA total budget |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded systems and test equipment |
Pinout & Package
LT1124ACN8#PBF is housed in an 8-lead PDIP (N8) package with standard pinout (non-rotated), compatible with legacy OP-270 sockets. Pin 1 is marked via bevel 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 of Amp A - accepts rail-to-rail common-mode range (±12V) |
| 3 | +IN A | Non-inverting input of Amp A - matched bias current (±7nA max) minimizes offset drift |
| 4 | V– | Negative supply rail - must be decoupled locally to suppress PSRR degradation |
| 5 | V+ | Positive supply rail - supports ±4V to ±18V operation; 190°C/W θJA |
| 6 | +IN B | Non-inverting input of Amp B - electrically isolated from Amp A for dual-channel independence |
| 7 | –IN B | Inverting input of Amp B - shares same noise and offset specs as Amp A |
| 8 | OUT B | Amplifier B output - fully independent channel with identical AC/DC specs |
Key Features
| Feature | Design Value |
|---|---|
| 100% tested voltage noise per amplifier | Guarantees ≤4.2nV/√Hz max for each op amp - eliminates batch-level noise screening uncertainty |
| Dual-amplifier matching | ≤110µV VOS mismatch (50% yield) - enables high-accuracy 3-op-amp instrumentation amps without external trimming |
| High PSRR & CMRR | 116dB PSRR / 112dB CMRR min - maintains accuracy in noisy industrial power environments |
| Low input bias current | ±7nA max - reduces voltage error across high-Z sources like piezoelectric sensors |
| Standard PDIP pinout | Direct OP-270 socket replacement - no PCB redesign required for legacy upgrades |
Applications
| Strain Gauge Amplifier | Microvolt Threshold Detection |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in industrial weighing systems. IC Role / Device Role / Timing Role: Primary gain stage with low-noise, low-drift dual op amp configuration. Use Value: 2.7nV/√Hz noise and 70µV max VOS enable resolution of ≤5µV signals - sufficient for 16-bit effective dynamic range. |
Use Scenario: Detecting precise voltage thresholds in medical ECG front-ends or battery protection circuits. IC Role / Device Role / Timing Role: Precision comparator input buffer and reference amplifier. Use Value: 112dB CMRR rejects electrode motion artifacts; 0.3µV/°C drift ensures stable trip points over 0–70°C. |
| Tape Head Preamplifier | Infrared Detector Interface |
|
Use Scenario: Boosting low-level analog signals from magnetic tape playback heads before ADC sampling. IC Role / Device Role / Timing Role: High-fidelity, low-distortion gain block in audio signal chain. Use Value: THD+N <0.0001% at 1kHz and 20Vpp output ensures minimal harmonic contamination in wideband audio. |
Use Scenario: Conditioning weak photocurrent signals from pyroelectric or photodiode IR sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input current noise. Use Value: 0.3pA/√Hz input current noise at 1kHz preserves SNR when amplifying pA-level detector currents. |
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-270GP | Higher 4.5nV/√Hz noise (sample-tested), lower 1.7V/µs slew rate, no 100% noise testing | Less suitable for wideband audio or fast transient sensing where slew-limited distortion matters | Lower cost but requires system-level noise validation; not recommended for new designs demanding guaranteed noise |
| LT1124CS8#PBF | Same die, SO-8 package with rotated pinout; 0°C to 70°C grade; identical electrical specs | Requires PCB layout change due to non-standard SO-8 pin mapping vs. PDIP | Preferred for surface-mount production; LT1124ACN8#PBF remains optimal for through-hole prototyping and socket-based test fixtures |
Compared with OP-270GP, LT1124ACN8#PBF delivers 2.6× higher slew rate and guaranteed noise performance, while LT1124CS8#PBF offers identical specs in a modern SMT package - making LT1124ACN8#PBF the only choice for legacy-compatible, high-reliability through-hole deployment.
Availability
LT1124ACN8#PBF is available at Aetrix Electronics and suitable for industrial test equipment, medical sensor interfaces, and legacy system upgrades requiring stable component supply, long-term obsolescence management, and direct OP-270 socket compatibility.
Supply support for LT1124ACN8#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 the LT1124/LT1125 family. Linear Technology pioneered high-precision analog ICs with emphasis on noise, drift, and matching.
The LT1124 series was designed specifically for dual-channel precision signal conditioning where low noise, high speed, and guaranteed matching outweigh cost sensitivity - targeting instrumentation, medical, and test & measurement applications.
FAQ
What is the maximum operating temperature range for LT1124ACN8#PBF?
The LT1124ACN8#PBF is specified for 0°C to 70°C operation. This commercial-grade temperature range is explicitly defined in the Order Information table and applies to all N8-package variants with "AC" or "C" suffixes. It is not rated for extended industrial (–40°C to 85°C) or military (–55°C to 125°C) ranges.
Does LT1124ACN8#PBF support ±5V supply operation?
Yes, LT1124ACN8#PBF operates with supply voltages from ±4V to ±18V per Absolute Maximum Ratings. Electrical Characteristics tables confirm PSRR, CMRR, and output swing are specified at ±15V, but the device maintains full functionality - including 2.7nV/√Hz noise and 4.5V/µs slew rate - across the entire ±4V to ±18V range.
Is LT1124ACN8#PBF pin-compatible with OP-270GP?
Yes, LT1124ACN8#PBF uses the standard 8-lead PDIP pinout (N8 package) and is explicitly designed as a direct socket replacement for OP-270GP. The datasheet states "The LT1124 may be inserted directly into OP-270 sockets," confirming mechanical and electrical pin compatibility without PCB modification.
What is the input voltage noise density of LT1124ACN8#PBF at 10Hz?
LT1124ACN8#PBF has 3.0nV/√Hz typical input voltage noise density at 10Hz, as confirmed in the Electrical Characteristics table under "en Input Noise Voltage Density" for LT1124AC/AI/AM grades. This value is 100% tested and guaranteed ≤5.5nV/√Hz maximum.
How does LT1124ACN8#PBF compare to LT1124CN8#PBF?
LT1124ACN8#PBF and LT1124CN8#PBF share identical N8 PDIP packaging and 0°C to 70°C rating, but differ in precision grade: LT1124ACN8#PBF is Prime Grade (70µV max VOS), while LT1124CN8#PBF is standard Grade (100µV max VOS). All other parameters - noise, slew rate, bandwidth - are identical between the two.
LT1124ACN8#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:
- 20 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
LT1124ACN8#PBF FAQ
1.How can I place an order for LT1124ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1124ACN8#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 LT1124ACN8#PBF reliable?
The price and inventory of LT1124ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1124ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1124ACN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1124ACN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1124ACN8#PBF?
LT1124ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1124ACN8#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 LT1124ACN8#PBF?
For technical support, including LT1124ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1124ACN8#PBF requirements.
6.How does Aetrix verify that LT1124ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1124ACN8#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 LT1124ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1124ACN8#PBF?
All LT1124ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1124ACN8#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 LT1124ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1124ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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