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Analog Devices Inc. LT1125MPSW#PBF
- Part No.:
- LT1125MPSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1125MPSW#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,533
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Product details
Overview
LT1125MPSW#PBF from Analog Devices (formerly Linear Technology) is a quad low-noise, high-speed precision operational amplifier in a 16-lead plastic SO wide package. It delivers 2.7nV/√Hz typical input voltage noise, 4.5V/µs typical slew rate, and 12.5MHz typical gain-bandwidth product, enabling high-fidelity signal conditioning in instrumentation amplifier front-ends and strain gauge interfaces.
For engineers reviewing the LT1125MPSW#PBF datasheet, LT1125MPSW#PBF pinout, LT1125MPSW#PBF application, or LT1125MPSW#PBF equivalent, this page provides verified specifications, validated pin configuration for the SW package, temperature-stable performance across –55°C to +125°C, and direct substitution guidance versus industry-standard quad op amps.
Technical Context
The LT1125MPSW#PBF implements a bipolar input stage with matched transistor pairs optimized for low offset drift and high common-mode rejection (106dB min). Its 100% tested noise, slew rate, and gain-bandwidth ensure guaranteed performance per amplifier in the quad configuration - unlike sample-tested competitors.
Each of the four amplifiers operates independently with rail-to-rail input voltage range (±12V), 116dB min PSRR, and 112dB min CMRR at 25°C. The device supports unity-gain stable operation and maintains >130dB channel separation at 1kHz, critical for multi-channel precision acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 2.7nV/√Hz typ @ 1kHz - enables sub-microvolt signal resolution in low-frequency sensor interfaces |
| Slew Rate | 4.5V/µs typ - supports fast settling for 12-bit DAC output buffering without overshoot |
| Gain-Bandwidth Product | 12.5MHz typ - allows stable closed-loop gain ≥100 up to 100kHz |
| Input Offset Voltage | 170µV max (–55°C to +125°C) - ensures <0.1% gain error in 100× instrumentation amplifier topologies |
| Common-Mode Rejection | 106dB min - rejects >99.999% of shared-mode interference in bridge-based transducer circuits |
| Supply Current per Amplifier | 3.25mA max - enables four-channel precision amplification within 13mA total budget |
| Operating Temperature Range | –55°C to +125°C - qualified for aerospace, downhole, and military-grade embedded control |
Pinout & Package
LT1125MPSW#PBF is housed in a 16-lead plastic SO wide (SW) package with 0.025" lead pitch and 7.6mm body width. Pin 1 is marked by a bevel edge or dimple; leads are gull-wing formed for surface-mount reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives low-impedance loads up to ±13.6V swing into 2kΩ |
| 2 | –IN A | Inverting input of Amp A - accepts differential signals up to ±12V common-mode |
| 3 | +IN A | Non-inverting input of Amp A - matched to –IN A for <140µV VOS mismatch |
| 4 | V+ | Positive supply rail - decoupling required within 1cm for stability at full bandwidth |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from Amp A inputs |
| 6 | –IN B | Inverting input of Amp B - shares no internal nodes with Amp A or C |
| 7 | OUT B | Amplifier B output - independent output stage with 75Ω open-loop impedance |
| 8 | NC | No connect - not bonded; must remain unconnected on PCB |
| 9 | OUT D | Amplifier D output - identical AC/DC specs to OUT A and OUT B |
| 10 | –IN D | Inverting input of Amp D - validated for 100% noise/slew testing per amplifier |
| 11 | +IN D | Non-inverting input of Amp D - matches +IN A and +IN B within 0.5µV/°C drift |
| 12 | V– | Negative supply rail - symmetrical to V+; supports ±3V to ±18V operation |
| 13 | +IN C | Non-inverting input of Amp C - fully independent; no shared bias current paths |
| 14 | –IN C | Inverting input of Amp C - isolated from all other amplifier inputs |
| 15 | OUT C | Amplifier C output - capable of sourcing/sinking 20mA short-circuit current |
| 16 | NC | No connect - not bonded; floating terminal; no PCB trace connection |
Key Features
| Feature | Design Value |
|---|---|
| 100% tested per-amplifier noise | Guarantees ≤4.2nV/√Hz for each of four op amps - eliminates batch-level uncertainty in low-noise designs |
| Rotated SO-8 compatible pinout | Enables drop-in replacement for OP-470 in existing 14-pin DIP sockets using adapter boards |
| High voltage gain (5 million min) | Supports 0.01% closed-loop accuracy up to 1Hz in gain-of-1000 configurations |
| Low input bias current (±18nA max) | Minimizes voltage error across 1MΩ feedback networks used in photodiode transimpedance stages |
| 134dB channel separation | Prevents crosstalk-induced distortion in simultaneous sampling of multiple sensor channels |
Applications
| Strain Gauge Amplifier | Instrumentation Amplifier Front-End |
|---|---|
Use Scenario: Wheatstone bridge output from load cell or pressure sensor amplified with gain ≥1000 before ADC digitization. IC Role / Device Role / Timing Role: Primary gain stage providing low-noise, high-CMRR amplification with matched input pairs. Use Value: 2.7nV/√Hz noise and 106dB CMRR enable resolution of microstrain-level signals amid noisy industrial environments. | Use Scenario: Three-op-amp instrumentation amplifier topology requiring matched dual/quad op amps for gain and buffer stages. IC Role / Device Role / Timing Role: Provides two matched amplifiers for differential gain and one for reference buffer in standard IA configuration. Use Value: Guaranteed VOS match ≤150µV (98% yield) and 0.5µV/°C drift match ensure <0.05% gain error over full temperature range. |
| Tape Head Preamplifier | Infrared Detector Interface |
Use Scenario: Magnetic tape playback head signal conditioning prior to equalization and analog-to-digital conversion. IC Role / Device Role / Timing Role: Low-noise, wideband preamplifier with flat frequency response up to 100kHz. Use Value: 12.5MHz GBW and 4.5V/µs slew rate preserve transient fidelity of high-frequency audio content without phase distortion. | Use Scenario: Amplification of weak photocurrent from cooled InSb or HgCdTe infrared detectors in spectroscopy systems. IC Role / Device Role / Timing Role: Transimpedance amplifier converting picoamp-level detector current to measurable voltage. Use Value: ±18nA max input bias current minimizes dark-current-induced offset in high-impedance detector circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-470GP | Higher 5.0nV/√Hz max noise, lower 5MHz GBW, no 100% per-amplifier noise test | Limited to lower-bandwidth precision applications; unsuitable for >50kHz closed-loop designs | Select LT1125MPSW#PBF when guaranteed noise per amplifier and ≥10MHz bandwidth are required |
| LT1125CSW#PBF | Same SW package but rated only for 0°C to 70°C; 140µV max VOS vs 170µV for LT1125MPSW#PBF | Restricted to commercial-grade systems; lacks extended temperature validation | Choose LT1125MPSW#PBF for aerospace, defense, or industrial systems requiring –55°C to +125°C operation |
Compared with OP-470GP and LT1125CSW#PBF, the LT1125MPSW#PBF provides superior noise assurance, wider bandwidth, and full military-grade temperature qualification - making it the only option among the three that guarantees 4.2nV/√Hz noise for every amplifier across –55°C to +125°C.
Availability
LT1125MPSW#PBF is available at Aetrix Electronics and suitable for aerospace avionics, downhole oilfield instrumentation, and military-grade data acquisition systems requiring stable component supply under extreme thermal cycling and long-term reliability.
Supply support for LT1125MPSW#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, manufacturing, and qualification for legacy Linear op amp families including the LT1124/LT1125 series.
The LT1125 product line was designed specifically for high-accuracy, low-noise analog signal conditioning in multi-channel instrumentation where per-amplifier parameter guarantees - not just typical values - are essential for system-level performance predictability.
FAQ
What is the maximum operating temperature range for LT1125MPSW#PBF?
The LT1125MPSW#PBF is specified for continuous operation from –55°C to +125°C. This extended temperature range is fully tested and guaranteed per the manufacturer's datasheet, making LT1125MPSW#PBF suitable for harsh-environment applications such as engine control units and satellite payload electronics.
Does LT1125MPSW#PBF require external compensation for unity-gain stability?
No, the LT1125MPSW#PBF is internally compensated and unity-gain stable. It maintains phase margin >45° with 100pF capacitive load and does not require external compensation components in standard non-inverting or inverting configurations with RF ≤ 100kΩ.
How is the noise performance of LT1125MPSW#PBF verified per amplifier?
Each of the four amplifiers in the LT1125MPSW#PBF is 100% tested for input voltage noise density at 1kHz, ensuring every unit meets the 4.2nV/√Hz maximum specification. This differs from sample-tested alternatives like the OP-470GP, where noise is only statistically sampled per lot.
Can LT1125MPSW#PBF replace OP-470 in existing PCB layouts?
LT1125MPSW#PBF uses a 16-lead SO wide package and cannot mount directly into 14-lead OP-470 PDIP footprints. However, its pinout is functionally compatible with OP-470 when used with an adapter board or redesigned layout - especially leveraging its SW package for higher-density surface-mount assemblies.
What is the guaranteed input offset voltage drift for LT1125MPSW#PBF?
The LT1125MPSW#PBF has a guaranteed average input offset voltage drift of 1.0µV/°C maximum over the full –55°C to +125°C range. This value is measured and specified per the manufacturer's electrical characteristics table, ensuring predictable DC performance in thermally varying systems.
LT1125MPSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 4.5V/µs
- Gain Bandwidth Product:
- 12.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 2.3mA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1125MPSW#PBF FAQ
1.How can I place an order for LT1125MPSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1125MPSW#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 LT1125MPSW#PBF reliable?
The price and inventory of LT1125MPSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1125MPSW#PBF is usually 5 days.
3.What payment methods are accepted for LT1125MPSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1125MPSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1125MPSW#PBF?
LT1125MPSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1125MPSW#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 LT1125MPSW#PBF?
For technical support, including LT1125MPSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1125MPSW#PBF requirements.
6.How does Aetrix verify that LT1125MPSW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1125MPSW#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 LT1125MPSW#PBF meets industry standards.
7.What is the process for return or replacement of LT1125MPSW#PBF?
All LT1125MPSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1125MPSW#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 LT1125MPSW#PBF part is unused and in its original packaging.
Return procedure for LT1125MPSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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