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Analog Devices Inc. LT1112MPS8#PBF
- Part No.:
- LT1112MPS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1112MPS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:774
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Product details
Overview
LT1112MPS8#PBF from Analog Devices (formerly Linear Technology) is a dual precision operational amplifier optimized for low-power, picoampere-input, microvolt-level instrumentation applications. It delivers 75 µV max input offset voltage, 0.5 µV/°C max drift, 250 pA max input bias current, and 400 µA max supply current per amplifier - enabling high-accuracy signal conditioning in battery-powered thermocouple amplifiers and bridge sensor interfaces.
For engineers reviewing the LT1112MPS8#PBF datasheet, LT1112MPS8#PBF pinout, LT1112MPS8#PBF application, or LT1112MPS8#PBF equivalent, key selection criteria include guaranteed matching specifications over –55°C to +125°C, ±1.0 V minimum supply operation, SO-8 standard pinout compatibility, and verified performance in two/three-op-amp instrumentation amplifier topologies.
Technical Context
The LT1112MPS8#PBF employs a proprietary bipolar input stage with back-to-back diode protection, enabling clean clipping without phase reversal when inputs exceed common-mode range. Its matched dual architecture guarantees ∆VOS ≤ 70 µV and ∆IB+ ≤ 170 pA across temperature, directly supporting precision instrumentation amplifier designs requiring correlated error cancellation.
It operates down to ±1.0 V supplies while maintaining 120 dB CMRR and 116 dB PSRR, with guaranteed specs including 0.1 Hz–10 Hz noise of 0.3 µVP-P, slew rate of 0.16 V/µs, and gain-bandwidth product of 450 kHz - all validated across its full –55°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 µV max - enables sub-100 µV system offset budgets in precision sensor front-ends |
| Offset Voltage Drift | 0.5 µV/°C max - ensures <1 µV total drift over 0–70°C industrial range |
| Input Bias Current | 250 pA max - supports >1 GΩ source impedances without significant error |
| Supply Current per Amp | 400 µA max - allows dual-channel operation from two AA cells down to ±1.3 V |
| CMRR | 120 dB min - rejects common-mode interference in noisy industrial environments |
| Gain-Bandwidth Product | 450 kHz - sufficient for DC–100 Hz sensor signal bandwidth with stable unity-gain operation |
| Operating Temp Range | –55°C to +125°C - qualified for extended-temperature automotive and aerospace deployments |
Pinout & Package
LT1112MPS8#PBF is housed in an 8-lead plastic SO (SO-8) package with standard pinout per JEDEC MS-012, compatible with industry-standard PCB footprints and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - drives feedback network or next-stage load |
| 2 | –IN A | Inverting input A - accepts differential or single-ended signal with matched bias path |
| 3 | +IN A | Noninverting input A - high-impedance node for reference or sensor connection |
| 4 | V– | Negative supply rail - referenced to system ground or negative battery terminal |
| 5 | V+ | Positive supply rail - accepts +1.0 V to +20 V relative to V– |
| 6 | OUT B | Inverting amplifier output B - independent channel for dual-sensor or chopper-stabilized topology |
| 7 | –IN B | Inverting input B - electrically isolated from Channel A for true dual-channel operation |
| 8 | +IN B | Noninverting input B - matched to +IN A for instrumentation amplifier common-mode rejection |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Matching Specs | ∆VOS ≤ 70 µV and ∆IB+ ≤ 170 pA over full temperature range - enables accurate two-op-amp instrumentation amps without external trimming |
| Ultra-Low Input Bias Current | 250 pA max - preserves signal integrity from high-impedance sources like pH electrodes or piezoelectric sensors |
| Extended Temperature Operation | –55°C to +125°C - qualified for under-hood automotive and downhole industrial use |
| Low-Voltage Capability | Operates down to ±1.0 V supplies - extends battery life in portable medical and handheld test equipment |
| No Phase Reversal | Clips cleanly when input exceeds common-mode range - prevents catastrophic latch-up in sensor overvoltage events |
Applications
| Thermocouple Amplifier | Bridge Sensor Interface |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltages from K-type thermocouples in furnace control systems. IC Role / Device Role / Timing Role: Dual op-amp configured as first-stage low-noise preamplifier and second-stage reference buffer. Use Value: 0.3 µVP-P 0.1–10 Hz noise and 75 µV offset enable ±0.5°C accuracy without cold-junction compensation trimming. | Use Scenario: Conditioning output from 350 Ω strain gauge bridges in structural health monitoring. IC Role / Device Role / Timing Role: Dual amplifier implementing three-op-amp instrumentation topology with matched gain-setting resistors. Use Value: Guaranteed ∆VOS ≤ 70 µV and ∆CMRR ≥ 112 dB ensure >100 dB common-mode rejection at 60 Hz line frequency. |
| Battery-Powered Data Logger | Low-Frequency Active Filter |
Use Scenario: Signal chain front-end for multi-channel environmental sensor nodes powered by two AA cells. IC Role / Device Role / Timing Role: Dual amplifier providing rail-to-rail input/output swing and ultra-low quiescent current. Use Value: 400 µA per amplifier enables >1-year battery life at 1-sample-per-second acquisition rate. | Use Scenario: 10 Hz anti-aliasing filter for vibration sensing in predictive maintenance systems. IC Role / Device Role / Timing Role: Dual op-amp configured as Sallen-Key low-pass stage with matched internal components. Use Value: 0.5 µV/°C drift and 450 kHz GBW support stable 10 Hz cutoff with <0.1% passband gain error over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1112CN8#PBF | Same core design but rated only for –40°C to +85°C; 30 µV max offset (prime grade) | Not suitable for extended-temperature automotive or aerospace deployments | Select LT1112MPS8#PBF when full –55°C to +125°C operation with guaranteed matching is required |
| AD8628ARZ | Zero-drift architecture; 1 µV max offset, 0.005 µV/°C drift, but 1.2 mA supply current | Higher power consumption limits battery life; superior DC precision trades off against quiescent current | Choose AD8628ARZ only when sub-µV offset dominates over power budget constraints |
Compared with LT1112CN8#PBF, LT1112MPS8#PBF provides extended temperature qualification and guaranteed matching specs; compared with AD8628ARZ, it offers 3× lower supply current at the cost of higher initial offset - making it optimal for long-life, wide-temperature, matched dual-channel applications where µV-level drift matters more than absolute offset.
Availability
LT1112MPS8#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, bridge sensor interfaces, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1112MPS8#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 documentation for legacy Linear parts including the LT1112 family.
The LT1112 product line was designed specifically for precision, low-power, matched dual op-amp applications in instrumentation, sensor conditioning, and battery-operated measurement systems - emphasizing picoampere input bias, microvolt offset, and guaranteed matching over temperature.
FAQ
What is the maximum input offset voltage specification for LT1112MPS8#PBF over its full operating temperature range?
The LT1112MPS8#PBF has a maximum input offset voltage of 75 µV across its full –55°C to +125°C operating range, as guaranteed in the datasheet's "ELECTRICAL CHARACTERISTICS" table for the MPS8 grade. This value applies under standard test conditions (VS = ±15 V, TA = 25°C unless otherwise noted), and the part is tested to ensure compliance across temperature extremes.
Does LT1112MPS8#PBF support operation from ±1.0 V supplies, and what performance is guaranteed at that voltage?
Yes, LT1112MPS8#PBF is explicitly guaranteed to operate from ±1.0 V supplies, with key parameters including input offset voltage (110 µV max), supply current (370 µA max), and PSRR (114 dB min) all specified at this minimum supply condition. This capability enables direct use with nearly depleted AA batteries in portable instrumentation.
Is LT1112MPS8#PBF pin-compatible with other packages in the LT1112 family, such as the PDIP or CERDIP versions?
Yes, LT1112MPS8#PBF uses the standard SO-8 pinout identical to the LT1112CN8, LT1112IN8, and LT1112ACN8 variants - meaning it shares the same pin assignments for OUT A, –IN A, +IN A, V–, V+, OUT B, –IN B, and +IN B. This allows drop-in replacement on existing SO-8 footprints without layout changes.
What is the guaranteed input bias current match (∆IB+) specification for LT1112MPS8#PBF, and why does it matter in instrumentation designs?
The LT1112MPS8#PBF guarantees ∆IB+ ≤ 170 pA over –55°C to +125°C. This parameter represents the difference between noninverting input bias currents of the two amplifiers, directly impacting offset current in two-op-amp instrumentation amplifier configurations - where uncorrelated bias currents degrade common-mode rejection and introduce temperature-dependent errors.
Can LT1112MPS8#PBF be used in a three-op-amp instrumentation amplifier, and what matching specs are relevant?
Yes, LT1112MPS8#PBF is explicitly recommended for three-op-amp instrumentation amplifiers, with guaranteed matching specs including ∆VOS ≤ 70 µV, ∆CMRR ≥ 112 dB, and ∆PSRR ≥ 109 dB. These ensure correlated error cancellation between channels, enabling high common-mode rejection (>100 dB) even with imperfect external resistor matching.
LT1112MPS8#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:
- 0.3V/µs
- Gain Bandwidth Product:
- 750 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 pA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 350µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1112MPS8#PBF FAQ
1.How can I place an order for LT1112MPS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1112MPS8#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 LT1112MPS8#PBF reliable?
The price and inventory of LT1112MPS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1112MPS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1112MPS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1112MPS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1112MPS8#PBF?
LT1112MPS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1112MPS8#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 LT1112MPS8#PBF?
For technical support, including LT1112MPS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1112MPS8#PBF requirements.
6.How does Aetrix verify that LT1112MPS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1112MPS8#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 LT1112MPS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1112MPS8#PBF?
All LT1112MPS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1112MPS8#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 LT1112MPS8#PBF part is unused and in its original packaging.
Return procedure for LT1112MPS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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