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Analog Devices Inc. LTC6091HUFE#PBF
- Part No.:
- LTC6091HUFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC6091HUFE#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:341
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Product details
Overview
LTC6091HUFE#PBF from Analog Devices (formerly Linear Technology) is a dual, high-voltage, rail-to-rail output precision operational amplifier designed for ±70V (140V total) supply operation. It delivers 50mA output drive, 12MHz gain-bandwidth, 21V/µs slew rate, and ultra-low input bias current (50pA max), making it suitable for photodiode amplification, piezo driver circuits, and high-voltage regulator feedback loops.
For engineers reviewing the LTC6091HUFE#PBF datasheet, LTC6091HUFE#PBF pinout, LTC6091HUFE#PBF application, or LTC6091HUFE#PBF equivalent, key selection criteria include guaranteed 125°C junction temperature operation, thermal warning flag (TFLAG) with 145°C activation threshold, independent output disable (OD) per channel, and 4mm × 6mm QFN package with exposed V– pad for thermal management.
Technical Context
The LTC6091HUFE#PBF integrates two independent high-voltage amplifiers on a single monolithic CMOS die, sharing only the V– substrate and exposed thermal pad. Each channel features a low-noise, picoamp-bias input stage, rail-to-rail output capable of sourcing/sinking 50mA, and internal thermal sensing with open-drain TFLAG outputs.
It supports split (±70V) or single-supply (140V) configurations, with independent V+A/V+B pins enabling asymmetric supply rails. Output disable (OD) is referenced to COM pins, allowing safe interfacing with low-voltage logic via external pull-down or NMOS switches without violating absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4.75V to ±70V (140V total); enables direct interface with high-voltage industrial and test equipment rails. |
| Input Bias Current | 50pA maximum at ±70V; critical for high-impedance sensor interfaces like photodiodes and piezoelectric transducers. |
| Input Offset Voltage | ±1.25mV maximum; ensures minimal DC error in precision closed-loop systems such as HV regulators. |
| Gain-Bandwidth Product | 12MHz; supports stable unity-gain operation with up to 200pF capacitive load for driving long cables or capacitive loads. |
| Slew Rate | 21V/µs; enables fast settling for high-voltage step responses in ATE and optical networking signal conditioning. |
| CMRR / PSRR | 130dB min CMRR, 112dB min PSRR; maintains accuracy under high common-mode noise or supply ripple in HV environments. |
| Operating Temperature | –40°C to +125°C junction; qualified for extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
Package: 16-lead 4mm × 6mm plastic QFN (UFE) with exposed V– pad (Pin 17), requiring soldering to PCB thermal plane for θJC = 15°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –INA / –INB (Pins 1, 5) | Inverting input | V– + 3V to V+ – 3V common-mode range; protected by back-to-back diodes and Zener clamps against overvoltage. |
| +INA / +INB (Pins 2, 6) | Noninverting input | Same CMR as inverting inputs; requires guarding and PCB cleaning to prevent >70pA leakage at ±70V supplies. |
| V– (Pins 3, 7, 17) | Negative supply / thermal pad | All three must be tied together and soldered to large V– copper plane; primary heat path from die to PCB. |
| V+A / V+B (Pins 14, 10) | Independent positive supplies | Enable unbalanced split supplies (e.g., +100V/–40V); each bypassed separately with 0.1µF ceramic capacitor. |
| OUTA / OUTB (Pins 13, 9) | Rail-to-rail output | 50mA sink/source capability; avoid forward-biasing ESD diodes by limiting output swing beyond V+/V– rails. |
| ODA / ODB (Pins 15, 11) | Active-low output disable | Referenced to COMA/COMB; internal 2MΩ pull-up enables output when floating; asserts low to disable output stage. |
| TFLAGA / TFLAGB (Pins 12, 8) | Open-drain thermal warning | Sinks 200µA typical when die reaches 145°C; hysteresis of 5°C ensures reliable recovery at ~140°C. |
| COMA / COMB (Pins 16, 4) | Reference for OD/TFLAG | May float or tie to ground; defines voltage reference for OD logic thresholds and TFLAG output swing limits. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full ±70V swing into 10kΩ load with <450mV headroom, enabling maximum dynamic range in HV feedback networks. |
| Thermal protection with flag | Dual independent die-temperature sensors assert open-drain TFLAG outputs at 145°C, enabling system-level thermal shutdown coordination. |
| Per-channel output disable | OD pins allow independent shutdown of each amplifier while retaining input bias and offset stability-critical for multiplexed HV systems. |
| Low 0.1Hz–10Hz noise | 3.5µVP-P enables precision DC-coupled measurements in photodiode and strain gauge front-ends without AC coupling. |
| Unity-gain stable with 200pF | Eliminates need for external compensation in capacitive-load applications such as piezo actuator drivers and HV filter stages. |
Applications
| Photodiode Amplifier | Piezo Driver |
|---|---|
|
Use Scenario: High-gain transimpedance amplification of weak photocurrents from large-area or low-light photodiodes. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with ultra-low input bias current and low 1/f noise. Use Value: Enables sub-picoamp current resolution without guard-ring PCB complexity; 50pA max IB ensures <0.1% gain error at 100MΩ feedback. |
Use Scenario: Driving high-capacitance piezoelectric actuators in nanopositioning stages and inkjet printheads. IC Role / Device Role / Timing Role: High-slew-rate, high-output-current voltage driver with rail-to-rail swing. Use Value: 21V/µs slew rate and 50mA drive deliver fast, distortion-free step response to 100nF loads-reducing positioning latency by >40% vs legacy HV op-amps. |
| High-Voltage Regulator | Optical Networking |
|
Use Scenario: Error amplifier in linear or switching HV power supplies regulating ±60V outputs for RF power amplifiers. IC Role / Device Role / Timing Role: Precision feedback comparator with high PSRR and CMRR to reject supply ripple and load transients. Use Value: 112dB PSRR and 130dB CMRR maintain <10ppm regulation accuracy despite ±70V supply noise or 60V load steps. |
Use Scenario: Bias control and modulation driver for electro-optic modulators (EOMs) in 100G/400G coherent transceivers. IC Role / Device Role / Timing Role: Fast-settling, low-drift HV buffer for analog bias voltage generation. Use Value: 2µs 0.1% settling time and ±5µV/°C drift ensure stable EOM bias over temperature-preventing wavelength drift >0.1pm in DWDM systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1490AIS8#PBF | Single-channel, ±40V max supply, 1.2MHz GBW, 0.4V/µs slew, 250pA IB | Limited to lower-voltage (<±40V) precision applications; lacks thermal flag and output disable. | Select when cost-sensitive, lower-voltage (<±40V), and thermal monitoring is unnecessary. |
| OPA454AIDDA | Single-channel, ±50V max supply, 2.5MHz GBW, 12V/µs slew, 20pA IB, no TFLAG/OD | Higher input bias current spec but wider bandwidth than LT1490; no per-channel disable or thermal flag. | Choose for higher-speed (>2MHz) single-channel HV applications where thermal safety logic is handled externally. |
Compared with LT1490AIS8#PBF and OPA454AIDDA, the LTC6091HUFE#PBF uniquely provides dual-channel operation at ±70V, integrated thermal warning with hysteresis, per-channel output disable, and picoamp input bias-making it the only option for thermally robust, space-constrained dual-HV precision systems.
Availability
LTC6091HUFE#PBF is available at Aetrix Electronics and suitable for photodiode amplification, piezo actuation, and high-voltage regulator feedback requiring stable component supply across industrial, test & measurement, and optical infrastructure programs.
Supply support for LTC6091HUFE#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 high-performance analog portfolio, emphasizing precision, high-voltage, and signal integrity solutions for demanding industrial and communications applications.
The LTC6091HUFE#PBF belongs to Linear's high-voltage precision op-amp family, engineered specifically for applications requiring rail-to-rail output swing, picoamp input bias, and robust thermal management at ±70V supply levels.
FAQ
What is the maximum junction temperature rating for the LTC6091HUFE#PBF?
The LTC6091HUFE#PBF has an absolute maximum junction temperature of 150°C, with thermal shutdown triggered at approximately 175°C. Its specified operating junction temperature range is –40°C to +125°C, and the TFLAG output activates at 145°C to provide early thermal warning before shutdown occurs. This ensures reliable operation in extended-temperature industrial environments while protecting against catastrophic failure.
Can the LTC6091HUFE#PBF operate from a single 140V supply?
Yes, the LTC6091HUFE#PBF supports single-supply operation up to 140V between V+ and V– pins. In this configuration, V– serves as the circuit ground reference, and the rail-to-rail output swings from near V– to near V+. Input common-mode range extends from V– + 3V to V+ – 3V, enabling use in high-side sensing and single-rail HV signal conditioning without level-shifting circuitry.
How does the output disable (OD) function work on the LTC6091HUFE#PBF?
The LTC6091HUFE#PBF features independent active-low OD pins (ODA and ODB) per channel, referenced to their respective COM pins. When OD is pulled below COM + 0.65V, the output stage disables while input bias and offset circuits remain active, reducing quiescent current to ~580µA per disabled channel. This allows rapid re-enablement without full power-up delay, ideal for multiplexed HV systems.
What is the purpose of the COM pin on the LTC6091HUFE#PBF?
The COM pin (COMA and COMB) on the LTC6091HUFE#PBF establishes the local reference voltage for the OD and TFLAG pins. It may be floated or tied to ground, but must never exceed absolute maximum ratings relative to V– or V+. Using COM as a local reference enables safe interfacing with low-voltage logic (e.g., 3.3V microcontrollers) without level shifters, since OD and TFLAG thresholds scale with COM rather than V–.
Is the LTC6091HUFE#PBF unity-gain stable with capacitive loads?
Yes, the LTC6091HUFE#PBF is unity-gain stable with up to 200pF of capacitive load at the output, eliminating the need for external compensation in many high-voltage applications. This capability is verified across temperature and supply conditions, supporting direct driving of piezo elements, coaxial cables, and HV filter networks without peaking or oscillation-provided proper PCB layout and supply decoupling are implemented.
LTC6091HUFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 21V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 330 µV
- Current - Supply:
- 2.8mA (x2 Channels)
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 9.5 V
- Voltage - Supply Span (Max):
- 140 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32(16)-QFN (4x6)
LTC6091HUFE#PBF FAQ
1.How can I place an order for LTC6091HUFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6091HUFE#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 LTC6091HUFE#PBF reliable?
The price and inventory of LTC6091HUFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6091HUFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC6091HUFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6091HUFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6091HUFE#PBF?
LTC6091HUFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6091HUFE#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 LTC6091HUFE#PBF?
For technical support, including LTC6091HUFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6091HUFE#PBF requirements.
6.How does Aetrix verify that LTC6091HUFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6091HUFE#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 LTC6091HUFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC6091HUFE#PBF?
All LTC6091HUFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6091HUFE#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 LTC6091HUFE#PBF part is unused and in its original packaging.
Return procedure for LTC6091HUFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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