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Analog Devices Inc. LT6014ACDD#PBF
- Part No.:
- LT6014ACDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6014ACDD#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,841
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Product details
Overview
LT6014ACDD#PBF from Analog Devices (formerly Linear Technology) is a dual precision rail-to-rail output operational amplifier optimized for low-noise, micro-power sensor interface applications. It delivers 9.5nV/√Hz input voltage noise at 1kHz, 145µA per amplifier supply current, and 35µV max input offset voltage (A-grade), operating from 2.7V single supply to ±18V. It is used in thermocouple amplifiers and precision photodiode front-ends where accuracy, low drift, and rail-to-rail swing are critical.
For engineers reviewing the LT6014ACDD#PBF datasheet, LT6014ACDD#PBF pinout, LT6014ACDD#PBF application, or LT6014ACDD#PBF equivalent, key selection criteria include guaranteed AV ≥5 stability, 0.2V/µs slew rate, 1.4MHz gain bandwidth, ±250pA max input bias current (A-grade), and DFN-8 package compatibility with space-constrained battery-powered instrumentation.
Technical Context
The LT6014ACDD#PBF employs a decompensated internal architecture requiring minimum closed-loop gain of 5 for stability-unlike unity-gain stable op amps-and supports up to 500pF capacitive load at that gain. Its input stage uses on-chip bias current cancellation, resulting in uncorrelated IB+ and IB−, making traditional input resistor balancing counterproductive.
It features factory-trimmed input offset voltage (≤35µV over 0°C–70°C), 0.8µV/°C max VOS drift (S8), 1.2µV/°C max (DD), and rail-to-rail output swing within 40mV of either rail at light load-enabling high dynamic range in low-voltage single-supply systems such as portable medical sensors and industrial transmitters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 145µA per amplifier - enables multi-year battery life in always-on sensor nodes |
| Input Voltage Noise | 9.5nV/√Hz at 1kHz - preserves signal integrity in low-level thermocouple and photodiode amplification |
| Input Offset Voltage | ≤35µV (max, 0°C–70°C) - ensures ≤0.001% error in 3.3V full-scale precision measurement |
| Gain Bandwidth Product | 1.4MHz - supports stable closed-loop operation up to ~280kHz at gain=5 |
| Slew Rate | 0.2V/µs - adequate for <10kHz small-signal settling in instrumentation-grade filtering |
| Rail-to-Rail Output | Swings to within 40mV of V+ and V− - maximizes usable dynamic range on 3.3V or 5V supplies |
| Input Bias Current | ±250pA max (A-grade, 0°C–70°C) - permits use with >10MΩ source impedances without significant error |
Pinout & Package
LT6014ACDD#PBF is housed in an 8-lead 3mm × 3mm plastic DFN package (DD) with exposed metal pad connected to V–. Pin 1 is marked by top-side marking "6014A" and corner cut; underside thermal pad improves power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives external load; rail-to-rail swing supports single-supply signal chain design |
| 2 (–IN A) | Inverting input A | Differential node for feedback networks; protected by 500Ω series resistors and back-to-back diodes |
| 3 (+IN A) | Non-inverting input A | High-impedance sensor interface point; requires guard ring in high-Z applications |
| 4 (V–) | Negative supply / ground reference | Connected to exposed thermal pad; PCB connection optional but recommended for thermal performance |
| 5 (V+) | Positive supply | Accepts 2.7V to 36V total supply range; PSRR ≥112dB minimizes supply ripple coupling |
| 6 (OUT B) | Amplifier B output | Independent output channel; channel separation ≥110dB prevents crosstalk in dual-path designs |
| 7 (–IN B) | Inverting input B | Matched to –IN A; offset match ≤120µV (A-grade) enables precision differential signal conditioning |
| 8 (+IN B) | Non-inverting input B | Matched to +IN A; input resistance ≥120GΩ maintains accuracy with high-impedance sources |
Key Features
| Feature | Design Value |
|---|---|
| Low 1/f noise | 200nVP-P (0.1Hz–10Hz) - critical for DC-coupled temperature and strain measurements |
| AV ≥5 stability | Guaranteed stable with ≥5 closed-loop gain and ≤500pF load - eliminates need for external compensation in gain-of-5+ circuits |
| Input offset drift | ≤1.2µV/°C (DD package) - ensures <100µV total drift over –40°C to 85°C industrial range |
| Rail-to-rail output | 40mV headroom at both rails on 5V supply - enables full-scale utilization of ADC input range |
| High CMRR | ≥107dB (min, 0°C–70°C) - rejects common-mode interference in noisy industrial environments |
| Wide supply range | 2.7V to ±18V - supports direct integration into legacy ±15V systems and modern 3.3V IoT nodes |
Applications
| Thermocouple Amplifier | Precision Photodiode Amplifier |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltage from K-type thermocouples in HVAC and process control sensors. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier with cold-junction compensation interface. Use Value: 35µV max VOS and 0.8µV/°C drift ensure <±0.5°C measurement error across –40°C to 85°C ambient. | Use Scenario: Transimpedance amplification of nanoamp photocurrent from IR photodiodes in gas analyzers. IC Role / Device Role / Timing Role: Low-noise, low-bias-current TIA front-end with rail-to-rail output driving SAR ADC. Use Value: 250pA max IB and 9.5nV/√Hz noise enable sub-10nA resolution without active guarding. |
| Instrumentation Amplifier Front-End | Battery-Powered Precision System |
Use Scenario: First-stage gain and buffering in 3-op-amp INAs for bridge sensor readout (e.g., load cells). IC Role / Device Role / Timing Role: Dual-channel matched amplifier providing gain and common-mode rejection before difference stage. Use Value: 120µV max offset match and ≥110dB channel separation minimize gain/CMRR errors in high-precision INA topologies. | Use Scenario: Signal conditioning in handheld multimeters and portable calibration tools powered by coin-cell batteries. IC Role / Device Role / Timing Role: Dual-channel analog front-end for multiplexed sensor inputs with ultra-low quiescent power. Use Value: 145µA per amplifier allows >5-year battery life in wake-on-event architectures with periodic sampling. |
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 |
|---|---|---|---|
| LT6014ACS8#PBF | SO-8 package; 0.8µV/°C max VOS drift vs. 1.2µV/°C for DD; same electrical specs | Preferred for prototyping, through-hole assembly, or thermal management in higher-power designs | Select when board layout allows larger footprint or thermal relief via SO-8 leads is needed |
| LT6012ACDD#PBF | Unity-gain stable; higher 14nV/√Hz noise; same 145µA supply current and rail-to-rail output | Suitable for gain-of-1 buffers, active filters, and configurations requiring <5 closed-loop gain | Choose only if circuit requires unity-gain stability-LT6014ACDD#PBF must not be used below gain=5 |
Compared with LT6014ACS8#PBF, the LT6014ACDD#PBF saves 40% board area and offers better thermal coupling to PCB but slightly higher VOS drift; versus LT6012ACDD#PBF, it provides lower noise and higher bandwidth at the cost of mandatory gain≥5 operation-making it optimal for fixed-gain precision sensor interfaces.
Availability
LT6014ACDD#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, precision photodiode amplifiers, and battery-powered instrumentation requiring stable component supply, long-term parametric consistency, and DFN-8 footprint compatibility.
Supply support for LT6014ACDD#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 its precision analog portfolio with rigorous qualification and long-term product support.
The LT6013/LT6014 family was designed for micro-power, low-noise precision signal conditioning in space- and energy-constrained industrial and medical instrumentation-emphasizing rail-to-rail output, low drift, and robust stability in gain-of-5+ configurations.
FAQ
What is the minimum stable gain for LT6014ACDD#PBF?
The LT6014ACDD#PBF is decompensated and specified for stable operation only at closed-loop gains of 5 or greater. Using it at unity gain or gain-of-2 will cause oscillation or excessive ringing. For unity-gain applications, consider the LT6012ACDD#PBF instead. The LT6014ACDD#PBF datasheet explicitly prohibits gain <5 configurations without external stabilization networks.
Does LT6014ACDD#PBF support rail-to-rail input?
No, the LT6014ACDD#PBF has rail-to-rail *output* but limited input common-mode range: V– + 1V to V+ – 1.2V. Exceeding this range causes gain collapse without phase reversal. For true rail-to-rail input, consider alternatives like the LT1881 or LTC2050. The LT6014ACDD#PBF's input stage is optimized for precision-not input voltage range.
What is the maximum capacitive load LT6014ACDD#PBF can drive?
The LT6014ACDD#PBF can drive up to 500pF capacitively at AV = 5. At higher gains (e.g., AV = 10), it supports larger loads. Driving >500pF at gain=5 risks instability; adding a 10Ω–50Ω series resistor between output and load restores stability. This limit is verified in the LT6014ACDD#PBF datasheet Figure 27 and Electrical Characteristics table.
How does the DFN package of LT6014ACDD#PBF affect thermal performance?
The LT6014ACDD#PBF's DFN-8 package features an exposed metal pad tied to V–, enabling direct thermal conduction to the PCB ground plane. With proper copper pour and vias, θJA drops to 160°C/W (vs. 190°C/W for SO-8), allowing safe operation at 230µA total supply current up to 85°C ambient. Thermal design guidelines for LT6014ACDD#PBF are detailed in Linear's Application Note AN123.
Is LT6014ACDD#PBF pin-compatible with other LT6014 variants?
Yes, all LT6014 variants-including LT6014ACDD#PBF, LT6014ACS8#PBF, and LT6014IDD#PBF-share identical 8-pin pinouts across DFN and SO-8 packages. Pin 1 (OUT A), pin 2 (–IN A), pin 3 (+IN A), pin 4 (V–), pin 5 (V+), pin 6 (OUT B), pin 7 (–IN B), and pin 8 (+IN B) are functionally and physically aligned. This enables drop-in replacement during redesign or qualification.
LT6014ACDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 1.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 35 µV
- Current - Supply:
- 200µA (x2 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT6014ACDD#PBF FAQ
1.How can I place an order for LT6014ACDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6014ACDD#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 LT6014ACDD#PBF reliable?
The price and inventory of LT6014ACDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6014ACDD#PBF is usually 5 days.
3.What payment methods are accepted for LT6014ACDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6014ACDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6014ACDD#PBF?
LT6014ACDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6014ACDD#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 LT6014ACDD#PBF?
For technical support, including LT6014ACDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6014ACDD#PBF requirements.
6.How does Aetrix verify that LT6014ACDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT6014ACDD#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 LT6014ACDD#PBF meets industry standards.
7.What is the process for return or replacement of LT6014ACDD#PBF?
All LT6014ACDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6014ACDD#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 LT6014ACDD#PBF part is unused and in its original packaging.
Return procedure for LT6014ACDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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