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Analog Devices Inc. LTC2065IF#PBF
- Part No.:
- LTC2065IF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LTC2065IF#PBF.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
LTC2065IF#PBF from Analog Devices is a quad, zero-drift, micropower operational amplifier optimized for ultra-low-power precision signal conditioning in battery-constrained and energy-harvesting systems. It delivers 2 µA maximum supply current per amplifier, 5 µV max input offset voltage, 0.02 µV/°C max offset drift, rail-to-rail input/output operation, and integrated EMI filtering - enabling high-resolution sensor interfacing in portable instrumentation and gas detection.
For engineers reviewing the LTC2065IF#PBF datasheet, LTC2065IF#PBF pinout, LTC2065IF#PBF application, or LTC2065IF#PBF equivalent, this page provides verified circuit role (precision quad op-amp), package mapping (14-lead TSSOP), thermal range (–40°C to +85°C), shutdown behavior (170 nA max), and real-world design meaning of key specs including input bias current (≤30 pA at 85°C) and gain bandwidth (20 kHz).
Technical Context
The LTC2065IF#PBF employs auto-zeroing and chopper-stabilized architecture with internal 5 kHz chopping frequency to eliminate 1/f noise and minimize DC errors. Its self-calibrating core achieves sub-microvolt offset stability without external components while maintaining continuous-time operation across its 20 kHz bandwidth.
It integrates an on-chip EMI filter delivering 114 dB rejection at 1.8 GHz and features low-charge power-up for duty-cycled applications. The SHDN pin (logic-high threshold ≥1.8 V referenced to V–) enables fast 2 ms wake-up with minimal output disturbance, supporting energy-aware system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 2 µA max per amplifier - enables multi-year battery life in wireless sensor nodes operating at 1 Hz sampling. |
| Input Offset Voltage | 5 µV max - supports 16-bit+ resolution in bridge-based strain or temperature sensing with <1 µV error contribution. |
| Offset Drift | 0.02 µV/°C max - ensures <0.5 µV total drift over 0–70°C ambient, critical for uncalibrated field-deployed sensors. |
| Input Bias Current | 30 pA max (–40°C to +85°C) - permits use of >10 MΩ feedback resistors without significant DC error or thermal noise penalty. |
| EMI Rejection | 114 dB at 1.8 GHz - suppresses cellular/WiFi interference in medical wearables and industrial IoT edge nodes. |
| Gain Bandwidth | 20 kHz - sufficient for DC–10 kHz sensor signals (e.g., oxygen, CO₂, thermopile) with stable unity-gain configuration. |
| Shutdown Current | 170 nA max per amplifier - reduces system quiescent power by >90% during sleep cycles without capacitor discharge issues. |
Pinout & Package
The LTC2065IF#PBF is housed in a 14-lead plastic TSSOP package (JEDEC MO-153, 5.0 mm × 4.4 mm × 1.2 mm) with exposed pad connected to V– for thermal enhancement. Pin 1 is marked with a dot; pin numbering follows standard TSSOP convention.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives feedback network; rail-to-rail swing supports single-supply 1.7–5.25 V operation. |
| 2 | –INA | Inverting input of Amp A - high-impedance node; sensitive to layout-induced thermocouple EMFs and EMI. |
| 3 | +INA | Noninverting input of Amp A - matched to –INA for common-mode rejection; requires symmetrical PCB routing. |
| 4 | V+ | Positive supply - bypass with 100 nF ceramic capacitor close to pin to stabilize internal regulation and EMI filter. |
| 5 | +INB | Noninverting input of Amp B - independent channel; no crosstalk coupling to Amp A beyond –100 dB at 1 MHz. |
| 6 | –INB | Inverting input of Amp B - electrically isolated from other inputs; supports separate sensor conditioning paths. |
| 7 | OUTB | Amplifier B output - identical performance to OUTA; usable for differential output stages or dual-sensor readout. |
| 8 | OUTD | Amplifier D output - fourth channel; pin placement allows compact 4-channel analog front-end layout with minimal trace length. |
| 9 | –IND | Inverting input of Amp D - shares V– reference plane; must be routed away from digital switching noise sources. |
| 10 | +IND | Noninverting input of Amp D - supports high-Z sensor interfaces such as electrochemical gas cells or pH electrodes. |
| 11 | V– | Negative supply - reference for all inputs/outputs; exposed pad must be soldered to PCB ground plane for thermal and noise control. |
| 12 | +INC | Noninverting input of Amp C - enables simultaneous monitoring of multiple transducers (e.g., temp + pressure + humidity). |
| 13 | –INC | Inverting input of Amp C - supports programmable gain configurations using external resistor networks. |
| 14 | OUTC | Amplifier C output - completes quad functionality; supports ratiometric measurements when paired with internal reference. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization from 1.7 V to 5.25 V supplies - eliminates level-shifting ICs in single-cell Li-ion or energy-harvesting designs. |
| Integrated EMI filter | 114 dB rejection at 1.8 GHz - removes RF rectification artifacts without external LC filters, reducing BOM count and board area. |
| Low-charge power-up | 2 ms wake-up time with <100 nC charge injection - prevents output glitches during periodic sensor activation in duty-cycled systems. |
| Quad-channel isolation | –100 dB crosstalk between adjacent channels at 1 MHz - supports simultaneous high-accuracy measurement of four independent sensors. |
| Self-calibrating architecture | Zero-drift operation with no external calibration required - maintains 5 µV offset and 0.02 µV/°C drift over lifetime and temperature. |
Applications
| Oxygen Sensor Signal Conditioning | Portable Medical Vital Signs Monitor |
|---|---|
|
Use Scenario: Amplifying microamp-level current from electrochemical oxygen sensors (e.g., City Technology 40XV) in handheld air quality analyzers. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with 10 MΩ feedback resistor, providing 1 V output per 100 nA input current. Use Value: 2 µA supply current extends AA battery life to >5 years; 30 pA input bias avoids gain error in high-R feedback networks. |
Use Scenario: Front-end amplification of ECG, SpO₂, and skin temperature signals in wearable patient monitors. IC Role / Device Role / Timing Role: Quad-channel signal conditioner - one channel for lead-off detection, three for biopotential acquisition. Use Value: Rail-to-rail I/O supports 1.8 V MCU interface; 114 dB EMI rejection prevents cellular interference from corrupting µV-level ECG waveforms. |
| Wireless Gas Detection Node | Energy-Harvesting Structural Health Monitor |
|
Use Scenario: Interfacing metal-oxide semiconductor (MOS) gas sensors in battery-powered industrial leak detectors. IC Role / Device Role / Timing Role: Low-power buffer and level shifter for sensor heater control and resistance measurement circuits. Use Value: Shutdown mode draws only 170 nA - allows 10-second wake-up every 5 minutes, achieving <1 µA average system current. |
Use Scenario: Amplifying piezoelectric vibration and strain gauge outputs in solar-powered bridge monitoring systems. IC Role / Device Role / Timing Role: Precision amplifier for low-frequency (<100 Hz) structural resonance detection with DC-coupled response. Use Value: 0.02 µV/°C drift ensures <1 µV error over outdoor temperature swings; 20 kHz GBW captures transient impact events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2065HUD#PBF | Same die, extended temperature range (–40°C to +125°C); 16-lead QFN package; 170 nA shutdown current. | Required for under-hood automotive or industrial control cabinet deployments above 85°C ambient. | Select when operating junction temperature exceeds 85°C or when QFN thermal performance (θJA = 68°C/W) is preferred over TSSOP. |
| AD8628ARZ-REEL7 | Single-channel, 1 µA supply current, 1 µV offset, but no shutdown mode and no integrated EMI filter. | Suitable for space-constrained single-sensor applications where quad integration and RF immunity are not required. | Choose for lowest possible offset in non-duty-cycled, low-noise lab-grade instruments - not for multi-sensor or noisy environments. |
Compared with LTC2065HUD#PBF, the LTC2065IF#PBF trades extended temperature rating and QFN thermal performance for TSSOP manufacturability and lower cost; versus AD8628ARZ-REEL7, it adds quad integration, shutdown, and EMI resilience at the expense of slightly higher offset and per-amplifier current.
Availability
LTC2065IF#PBF is available at Aetrix Electronics and suitable for portable instrumentation systems, wireless gas detection nodes, and energy-harvesting structural health monitors requiring stable component supply across long production lifecycles.
Supply support for LTC2065IF#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.
The LTC2065IF#PBF belongs to the LTC® micropower zero-drift op-amp family, designed specifically for ultra-low-power, high-accuracy sensor signal chains in battery-operated and energy-harvesting applications.
FAQ
What is the operating temperature range for the LTC2065IF#PBF?
The LTC2065IF#PBF is specified for operation from –40°C to +85°C. This industrial temperature grade is confirmed in the manufacturer's ordering information table and applies across all electrical parameters including input offset drift (0.02 µV/°C max) and supply current (2 µA max per amplifier). It does not support the –40°C to +125°C range offered by the H-grade variant LTC2065HF#PBF.
Does the LTC2065IF#PBF require external capacitors for stability?
Yes, the LTC2065IF#PBF requires a 100 nF ceramic bypass capacitor between V+ and V– pins, placed as close as possible to the device. This is mandatory to maintain stability, ensure proper EMI filter operation, and prevent oscillation - especially when driving capacitive loads exceeding 100 pF. The datasheet specifies no additional compensation components for unity-gain configurations.
How does the shutdown function work on the LTC2065IF#PBF?
The LTC2065IF#PBF enters shutdown when the SHDN pin is pulled to V– (ground). Its logic-high threshold is ≥1.8 V referenced to V–, and shutdown current is guaranteed ≤170 nA per amplifier at +85°C. The device wakes up in 2 ms with minimal output disturbance, making it ideal for microcontroller-controlled duty cycling in sensor nodes.
Can the LTC2065IF#PBF drive a 10kΩ load rail-to-rail?
Yes, the LTC2065IF#PBF delivers rail-to-rail output swing into 10 kΩ loads: VOH (V+ – VOUT) is ≤15 mV and VOL (VOUT – V–) is ≤15 mV at room temperature. This is verified in the Electrical Characteristics table under "Output Voltage Swing High/Low" conditions, ensuring full-scale utilization of 1.7–5.25 V supplies in single-ended ADC interfaces.
What is the maximum input common-mode voltage range for the LTC2065IF#PBF?
The LTC2065IF#PBF supports rail-to-rail input common-mode voltage from (V–) – 0.1 V to (V+) + 0.1 V, as guaranteed by CMRR specification. This allows direct interfacing with sensors operating at the supply rails - for example, bridging across a 1.8 V supply with outputs centered at 0.9 V - without level-shifting circuitry.
LTC2065IF#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0035V/µs
- Gain Bandwidth Product:
- 20 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 1.4µA (x4 Channels)
- Current - Output / Channel:
- 51 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LTC2065IF#PBF FAQ
1.How can I place an order for LTC2065IF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2065IF#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 LTC2065IF#PBF reliable?
The price and inventory of LTC2065IF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2065IF#PBF is usually 5 days.
3.What payment methods are accepted for LTC2065IF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2065IF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2065IF#PBF?
LTC2065IF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2065IF#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 LTC2065IF#PBF?
For technical support, including LTC2065IF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2065IF#PBF requirements.
6.How does Aetrix verify that LTC2065IF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2065IF#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 LTC2065IF#PBF meets industry standards.
7.What is the process for return or replacement of LTC2065IF#PBF?
All LTC2065IF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2065IF#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 LTC2065IF#PBF part is unused and in its original packaging.
Return procedure for LTC2065IF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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