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Analog Devices Inc. LT1114CN#PBF
- Part No.:
- LT1114CN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1114CN#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:543
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Product details
Overview
LT1114CN#PBF from Analog Devices (formerly Linear Technology) is a quad precision operational amplifier optimized for low-power, picoampere-input instrumentation applications. It delivers 75 µV max input offset voltage, 250 pA max input bias current, and 320 µA per amplifier supply current at ±1.0 V supplies - enabling operation from two nearly discharged AA cells. It is used in thermocouple amplifiers, bridge sensor interfaces, and battery-powered precision measurement systems.
For engineers reviewing the LT1114CN#PBF datasheet, LT1114CN#PBF pinout, LT1114CN#PBF application, or LT1114CN#PBF equivalent, key selection criteria include guaranteed matching specifications (ΔVOS ≤ 100 µV), full ±1.0 V supply operation, SO-14 package compatibility, and verified performance across –40°C to +85°C.
Technical Context
The LT1114CN#PBF implements a bipolar input stage with back-to-back diode input protection and independent biasing per amplifier. Its architecture enables precise matching between internal amplifiers A/D and B/C, supporting high-CMRR three-op-amp instrumentation topologies without external trimming.
It guarantees matched parameters including offset voltage match (ΔVOS), noninverting bias current match (ΔIB⁺), and common-mode rejection match (ΔCMRR) over temperature - critical for differential gain stages where error cancellation relies on amplifier pair symmetry rather than absolute specs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 µV max (low-cost grade, N-package) - enables sub-100 µV system offset in untrimmed instrumentation amps |
| Input Bias Current | ±250 pA max - supports high-impedance sensor interfaces (e.g., pH electrodes, photodiodes) without significant leakage error |
| Supply Current per Amp | 320 µA at ±1.0 V - allows dual-cell alkaline operation down to ~2.6 V total supply |
| CMRR | 120 dB min - rejects common-mode noise in bridge and thermocouple circuits with >1 MΩ source impedances |
| Offset Voltage Match | 100 µV max (ΔVOS) - ensures <100 µV inter-amplifier mismatch for accurate differential gain and offset cancellation |
| Gain-Bandwidth Product | 450 kHz - sufficient for DC–100 Hz sensor signal conditioning with stable unity-gain response |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and automotive cabin environments without derating |
Pinout & Package
N14 package: 14-lead plastic DIP (0.300" wide), through-hole mounting, JEDEC standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives feedback network or load; rail-to-rail swing limited to ±13.0 V (RL = 10 kΩ) |
| 2 | –IN A | Inverting input of Amp A - high-impedance node; protected by back-to-back diodes to V+ and V– |
| 3 | +IN A | Noninverting input of Amp A - matched to +IN B for instrumentation amp topology |
| 4 | V+ | Positive supply rail - accepts up to +20 V; must be ≥ |V–| for proper biasing |
| 5 | +IN B | Noninverting input of Amp B - adjacent to V+ pin to minimize capacitive CMRR mismatch vs +IN A |
| 6 | –IN B | Inverting input of Amp B - matched to –IN A for differential pair operation |
| 7 | OUT B | Amplifier B output - electrically isolated; no crosstalk above 150 dB at 10 Hz |
| 8 | NC | No connect - internal die pad; left floating per design, not tied to substrate |
| 9 | OUT D | Amplifier D output - identical electrical behavior to OUT A; supports 4-channel parallel or cascaded use |
| 10 | –IN D | Inverting input of Amp D - matched to –IN C; used in 4-op-amp active filter sections |
| 11 | +IN D | Noninverting input of Amp D - symmetric layout with +IN C for balanced common-mode rejection |
| 12 | V– | Negative supply rail - accepts down to –20 V; referenced for all internal bias currents |
| 13 | +IN C | Noninverting input of Amp C - positioned adjacent to V– to maintain pin-to-pin symmetry with +IN A/B/D |
| 14 | –IN C | Inverting input of Amp C - completes quad set; enables fully differential front-end designs |
Key Features
| Feature | Design Value |
|---|---|
| Picoampere input bias | Enables direct interfacing with >1 GΩ source impedances (e.g., piezoelectric sensors, glass electrodes) without guard traces or T-networks |
| Guaranteed amplifier matching | ΔVOS ≤ 100 µV and ΔIB⁺ ≤ 450 pA ensure predictable error cancellation in 3-op-amp instrumentation amplifiers |
| ±1.0 V minimum supply | Operates from two AA/AAA batteries at end-of-life (~1.3 V/cell), reducing need for boost regulators in portable meters |
| SO-14 and PDIP-14 pin compatibility | Same pinout as industry-standard quad op amps (OP-400, AD704), enabling drop-in replacement without PCB changes |
| Input overvoltage tolerance | Clips cleanly without phase reversal when input exceeds common-mode range - prevents latch-up in sensor fault conditions |
Applications
| Thermocouple Amplifier | Bridge Sensor Interface |
|---|---|
Use Scenario: Cold-junction-compensated K-type thermocouple measurement in HVAC controllers with 0.1°C resolution. IC Role / Device Role / Timing Role: LT1114CN#PBF serves as first-stage low-noise, low-drift instrumentation amplifier with matched pairs (A/B and C/D) for differential gain and reference buffering. Use Value: 0.3 µVP-P 0.1–10 Hz noise and 0.5 µV/°C drift enable <0.2°C total error over –20°C to +70°C ambient. | Use Scenario: Strain gauge readout in industrial load cells with 2 mV/V sensitivity and 120 Ω nominal resistance. IC Role / Device Role / Timing Role: LT1114CN#PBF configures as 3-op-amp instrumentation amplifier (A/B/C) with fourth amp (D) buffering the reference voltage. Use Value: Guaranteed ΔVOS ≤ 100 µV eliminates need for manual trim, reducing calibration time and component count in production test. |
| Battery-Powered Data Logger | Low-Frequency Active Filter |
Use Scenario: Portable environmental monitor logging temperature, humidity, and CO₂ using analog sensor outputs. IC Role / Device Role / Timing Role: LT1114CN#PBF provides rail-splitting, sensor buffering, anti-alias filtering, and ADC driver functions across four channels. Use Value: 320 µA per amplifier at ±1.0 V extends 2xAA battery life to >12 months in sleep-wake cycling mode. | Use Scenario: 1 Hz high-pass filter for seismic vibration monitoring with <10 nV/√Hz input noise floor. IC Role / Device Role / Timing Role: LT1114CN#PBF implements dual Sallen-Key stages (A+B for HPF, C+D for LPF) in 4-pole bandpass configuration. Use Value: 14 nV/√Hz @ 1 kHz and 0.15 µV/°C drift preserve signal integrity below 10 Hz without thermal stabilization. |
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 |
|---|---|---|---|
| AD704ARZ | Higher 25 µV max offset (grade A), but 500 µA supply current; no guaranteed matching specs | Requires external trimming for instrumentation use; unsuitable for uncalibrated low-power systems | Select AD704ARZ only when absolute offset is prioritized over power and matching |
| OP400GPZ | 75 µV max offset, 450 µA supply current; matching specs not guaranteed over temperature | Lacks ΔVOS/ΔIB⁺ characterization - limits accuracy in production-critical instrumentation | Choose OP400GPZ for legacy designs where pinout compatibility is mandatory but matching is not required |
Compared with AD704ARZ and OP400GPZ, the LT1114CN#PBF uniquely combines guaranteed matching, ultra-low bias current, and sub-1V operation - making it the only option qualified for untrimmed, battery-powered, high-impedance sensor front ends requiring long-term stability.
Availability
LT1114CN#PBF is available at Aetrix Electronics and suitable for thermocouple amplification, bridge sensor conditioning, and battery-powered data acquisition requiring stable component supply across industrial temperature ranges.
Supply support for LT1114CN#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 parts including the LT1114 series.
The LT1114 belongs to Linear's precision op amp family designed specifically for low-power, high-accuracy analog signal conditioning in sensor interfaces, medical instrumentation, and portable test equipment.
FAQ
What is the maximum supply voltage for LT1114CN#PBF?
The LT1114CN#PBF supports supply voltages up to ±20 V. Absolute maximum ratings specify differential supply of 40 V, and input voltage must not exceed V+ or fall below V– by more than a diode drop (~0.7 V). Operation at ±15 V is typical for industrial applications, while ±1.0 V enables ultra-low-power battery use.
Does LT1114CN#PBF support true rail-to-rail input or output?
No, the LT1114CN#PBF does not feature rail-to-rail input or output. Its input common-mode range extends to ±13.5 V with ±15 V supplies, and output swing reaches ±13.0 V into 10 kΩ. However, it operates linearly within 800 mV of each rail - sufficient for most precision sensor interfaces where signals remain well within supply bounds.
Is LT1114CN#PBF pin-compatible with other quad op amps?
Yes, the LT1114CN#PBF in the N14 (PDIP-14) package uses the industry-standard pinout shared by OP-400, AD704, and LM324 families. This allows direct replacement in existing layouts without PCB modification, provided thermal and supply constraints are verified.
What is the guaranteed operating temperature range for LT1114CN#PBF?
The LT1114CN#PBF is specified and tested over –40°C to +85°C. Unlike some variants (e.g., LT1114ACN), it carries full performance guarantees across this range - including offset voltage, matching specs, and supply current - making it suitable for uncontrolled industrial environments.
Can LT1114CN#PBF drive capacitive loads without instability?
The LT1114CN#PBF remains stable driving up to 1000 pF with appropriate feedback compensation. Typical applications use 100–500 pF loads (e.g., ADC input capacitance, cable capacitance). For >500 pF, adding a small series resistor (10–50 Ω) between output and load restores phase margin without degrading DC accuracy.
LT1114CN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 750 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 350µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LT1114CN#PBF FAQ
1.How can I place an order for LT1114CN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1114CN#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 LT1114CN#PBF reliable?
The price and inventory of LT1114CN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1114CN#PBF is usually 5 days.
3.What payment methods are accepted for LT1114CN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1114CN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1114CN#PBF?
LT1114CN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1114CN#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 LT1114CN#PBF?
For technical support, including LT1114CN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1114CN#PBF requirements.
6.How does Aetrix verify that LT1114CN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1114CN#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 LT1114CN#PBF meets industry standards.
7.What is the process for return or replacement of LT1114CN#PBF?
All LT1114CN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1114CN#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 LT1114CN#PBF part is unused and in its original packaging.
Return procedure for LT1114CN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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