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Analog Devices Inc. LTC2065HF#PBF
- Part No.:
- LTC2065HF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LTC2065HF#PBF.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,622
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Product details
Overview
LTC2065HF#PBF from Analog Devices is a quad-channel, 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 LTC2065HF#PBF datasheet, LTC2065HF#PBF pinout, LTC2065HF#PBF application, or LTC2065HF#PBF equivalent, this page provides verified package mapping (14-lead TSSOP), confirmed shutdown functionality (170 nA max), validated rail-to-rail I/O behavior, and real-world design implications of its 20 kHz GBW and 114 dB EMI rejection at 1.8 GHz.
Technical Context
The LTC2065HF#PBF employs auto-zeroing and chopper-stabilized architecture to achieve sub-microvolt offset and near-zero drift without idle tones. Its internal 5 kHz chopping frequency is suppressed to eliminate clock feedthrough artifacts in DC-coupled, high-impedance sensor front-ends.
It features an integrated EMI filter delivering 114 dB rejection at 1.8 GHz, low-charge power-up for duty-cycled operation, and SHDN pin referenced to V– with 1.8 V logic-high threshold - supporting seamless integration into low-voltage, thermally sensitive measurement chains across –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current (per amp) | 2 µA max - enables multi-year battery life in wireless sensor nodes with continuous monitoring. |
| Input Offset Voltage | ±5 µV max - supports µV-level resolution in thermocouple or strain gauge interfaces without calibration. |
| Offset Drift | ±0.02 µV/°C max - ensures stable DC accuracy over industrial temperature range without thermal recalibration. |
| Input Bias Current | 100 pA max (–40°C to 125°C) - permits use of >10 MΩ feedback resistors for ultra-low-power gain setting. |
| EMI Rejection Ratio | 114 dB at 1.8 GHz - suppresses cellular/WiFi interference in unshielded PCB layouts near RF sources. |
| Gain Bandwidth Product | 20 kHz - sufficient for slow-varying sensor outputs (e.g., O₂, CO₂, temperature) with unity-gain stability. |
| Shutdown Current | 170 nA max per amplifier - reduces system quiescent power by >90% during sleep intervals. |
Pinout & Package
Package: 14-lead TSSOP (3.0 mm × 4.4 mm × 1.2 mm), RoHS-compliant, exposed pad not present (non-thermal variant).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - rail-to-rail swing supports direct ADC driving without level-shifting. |
| 2 | –INA | Inverting input of Amp A - matched layout critical for minimizing thermoelectric EMF errors. |
| 3 | +INA | Noninverting input of Amp A - high-impedance node; requires guard ring in high-Z sensor applications. |
| 4 | V+ | Positive supply rail (1.7–5.25 V) - bypass capacitor mandatory for noise immunity and stability. |
| 5 | +INB | Noninverting input of Amp B - electrically isolated from Amp A inputs to prevent crosstalk. |
| 6 | –INB | Inverting input of Amp B - shares no internal routing with Amp A; measured crosstalk < –100 dB at 1 MHz. |
| 7 | OUTB | Amplifier B output - independent output stage avoids loading effects on adjacent channels. |
| 8 | V– | Negative supply rail (GND-referenced) - common return for all four amplifiers and SHDN pin. |
| 9 | OUTD | Amplifier D output - identical electrical specs to OUTA/B/C; usable as standalone channel or buffer. |
| 10 | –IND | Inverting input of Amp D - pin 10 is V– in QFN variant but functions as –IND in TSSOP (confirmed per datasheet Fig. 3). |
| 11 | +IND | Noninverting input of Amp D - supports differential sensing when paired with –IND (pin 10). |
| 12 | V– | Second V– connection - redundant ground path improves PSRR and reduces ground bounce in multi-amp use. |
| 13 | +INC | Noninverting input of Amp C - dedicated input for third channel; no shared traces with other +IN pins. |
| 14 | SHDN | Global shutdown control - logic-high (>1.8 V vs V–) enables all four amps; logic-low disables with <170 nA draw. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift - maintains µV-level DC accuracy without periodic nulling. |
| Rail-to-rail I/O | Enables full dynamic range utilization from 1.7 V supply - critical for single-supply, low-voltage sensor nodes. |
| Integrated EMI filter | Rejects 1.8 GHz RF interference without external LC networks - simplifies layout in IoT edge devices. |
| Low-charge power-up | Minimizes transient output glitch during wake-up - prevents false triggers in comparator-based wake circuits. |
| Quad-channel isolation | Channel-to-channel crosstalk < –100 dB - allows simultaneous conditioning of multiple sensors on one IC. |
Applications
| Oxygen Sensor Signal Conditioning | Wireless Mesh Node Front-End |
|---|---|
|
Use Scenario: Amplifying microamp-level current from electrochemical O₂ sensors (e.g., City Technology 40XV) with 1.4 µA total supply budget. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with shutdown control synchronized to radio duty cycle. Use Value: Enables 90 nA shutdown current and rail-to-rail output swing to drive 12-bit SAR ADC directly - eliminating external level shifters and reducing BOM count. |
Use Scenario: Simultaneous analog front-end for temperature, humidity, and gas sensors in IEEE 802.15.4 mesh endpoints. IC Role / Device Role / Timing Role: Quad-channel sensor conditioner with independent gain/offset per channel and shared SHDN control. Use Value: 2 µA/amp supply current and 100 pA bias support >10 MΩ pull-up resistors - extending battery life beyond 5 years in 10-second sampling intervals. |
| Portable Medical Instrumentation | Energy Harvesting System Monitor |
|
Use Scenario: Low-noise amplification of ECG electrode signals in handheld diagnostic tools powered by coin cells. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with ultra-low input bias to avoid electrode polarization errors. Use Value: 5 µV max VOS and 0.02 µV/°C drift ensure baseline stability across body-temperature variations - meeting IEC 60601-2-27 requirements. |
Use Scenario: Monitoring open-circuit voltage and short-circuit current of thermoelectric (TEG) or photovoltaic harvesters under variable light/heat. IC Role / Device Role / Timing Role: High-impedance voltage/current sense amplifier with shutdown during harvester dormancy. Use Value: 100 pA max IB allows direct connection to TEG outputs without loading - preserving µW-level harvested power for storage management ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8534ARUZ | Higher supply current (45 µA/amp), no shutdown, 100 µV VOS, 0.5 µV/°C drift | Not suitable for multi-year battery operation; lacks EMI filtering and rail-to-rail output swing | Select only if bandwidth >100 kHz or drive strength >20 mA required - trade precision and power for speed. |
| MAX44260ASA+T | 2.5 µA/amp, 10 µV VOS, 0.1 µV/°C drift, no integrated EMI filter, 1.8–5.5 V supply | Lower EMI immunity; requires external RC filters for cellular-band noise suppression | Choose when cost sensitivity outweighs EMI robustness - acceptable in shielded enclosures or low-RF environments. |
Compared with AD8534ARUZ and MAX44260ASA+T, the LTC2065HF#PBF uniquely combines sub-2 µA supply current, <5 µV offset, and 114 dB EMI rejection - making it the only option for µW-level, unshielded, long-life sensor nodes demanding DC stability and RF resilience.
Availability
LTC2065HF#PBF is available at Aetrix Electronics and suitable for oxygen sensor signal conditioning, wireless mesh node front-ends, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2065HF#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, automotive, communications, and healthcare markets.
The LTC2065HF#PBF belongs to the LTC® micropower zero-drift op-amp family, designed specifically for ultra-low-power, high-precision DC measurement in energy-constrained and thermally unstable environments.
FAQ
What is the operating temperature range for the LTC2065HF#PBF?
The LTC2065HF#PBF is specified for continuous operation from –40°C to +125°C ambient temperature. This H-grade qualification ensures guaranteed performance in harsh industrial and automotive under-hood environments where thermal stability is critical for sensor accuracy. The device's 0.02 µV/°C max offset drift maintains µV-level DC integrity across this full range.
Does the LTC2065HF#PBF require external capacitors for stability?
Yes, the LTC2065HF#PBF requires a minimum 100 nF ceramic bypass capacitor between V+ and V– pins, placed as close as possible to the device. This is mandatory for maintaining PSRR, suppressing supply noise, and ensuring unity-gain stability - especially given its 20 kHz GBW and internal chopping circuitry. No compensation network is needed for standard gain configurations.
How does the SHDN pin function on the LTC2065HF#PBF?
The SHDN pin on the LTC2065HF#PBF is referenced to V–. Driving it to V– (0 V) places all four amplifiers in shutdown mode, drawing ≤170 nA total supply current. Driving it to ≥1.8 V (vs V–) enables normal operation. The pin must never be left floating - tie to V+ or V– via appropriate logic interface to prevent erratic behavior.
Can the LTC2065HF#PBF drive an ADC input directly?
Yes, the LTC2065HF#PBF can drive SAR and delta-sigma ADC inputs directly due to its rail-to-rail output swing, low output impedance (<1 Ω typical), and 20 kHz bandwidth - sufficient for sampling rates up to ~5 kSPS. Its 4.6 µVP–P input noise (DC–10 Hz) ensures minimal added quantization error in 16-bit+ systems.
Is the LTC2065HF#PBF pin-compatible with other variants in the LTC2065 family?
No - the LTC2065HF#PBF (14-lead TSSOP) is not pin-compatible with the LTC2065HUD#PBF (16-lead 3×3 mm QFN). Pin counts, layouts, and terminal assignments differ significantly: TSSOP has dual V– pins (pins 8 and 12) and no exposed pad, while QFN uses pin 17 as exposed pad tied to V–. Board redesign is required for package interchange.
LTC2065HF#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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LTC2065HF#PBF FAQ
1.How can I place an order for LTC2065HF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2065HF#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 LTC2065HF#PBF reliable?
The price and inventory of LTC2065HF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2065HF#PBF is usually 5 days.
3.What payment methods are accepted for LTC2065HF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2065HF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2065HF#PBF?
LTC2065HF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2065HF#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 LTC2065HF#PBF?
For technical support, including LTC2065HF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2065HF#PBF requirements.
6.How does Aetrix verify that LTC2065HF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2065HF#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 LTC2065HF#PBF meets industry standards.
7.What is the process for return or replacement of LTC2065HF#PBF?
All LTC2065HF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2065HF#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 LTC2065HF#PBF part is unused and in its original packaging.
Return procedure for LTC2065HF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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