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Analog Devices Inc. LTC6091HUFE#TRPBF
- Part No.:
- LTC6091HUFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC6091HUFE#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,354
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Product details
Overview
LTC6091HUFE#TRPBF from Analog Devices (formerly Linear Technology) is a dual high-voltage precision operational amplifier with rail-to-rail output, ±70V (140V total) supply capability, 50pA max input bias current, and 1.25mV max input offset voltage. It operates across –40°C to +125°C and delivers 50mA output drive into resistive loads - ideal for piezo driver circuits requiring stable high-voltage gain and low leakage.
For engineers reviewing the LTC6091HUFE#TRPBF datasheet, LTC6091HUFE#TRPBF pinout, LTC6091HUFE#TRPBF application, or LTC6091HUFE#TRPBF equivalent, key selection criteria include thermal flag behavior (TFLAG active at 145°C), independent output disable per channel (ODA/ODB), COM pin interface requirements, and verified 12MHz GBW with 21V/µs slew rate under ±70V supplies.
Technical Context
The LTC6091HUFE#TRPBF integrates two independent high-voltage amplifiers on a single monolithic CMOS die sharing V– and substrate but featuring separate V+A/V+B supplies and isolated thermal sensing. Each channel includes dedicated open-drain TFLAG outputs and active-low OD pins referenced to their respective COM pins.
Its input stage uses guarded picoamp-level biasing with 3.5µVP-P (0.1Hz–10Hz) noise and 11nV/√Hz wideband density, while the rail-to-rail output stage sustains 50mA sink/source with <1000µV offset drift over temperature and >130dB CMRR up to ±67V common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.75V to ±70V (140V total); supports unbalanced split supplies like +100V/–40V |
| Input Bias Current | 50pA maximum at ±70V; enables ultra-high-impedance photodiode and piezo sensor interfaces |
| Input Offset Voltage | 1.25mV maximum; ensures sub-0.1% gain error in closed-loop configurations up to G = 100 |
| Gain-Bandwidth Product | 12MHz typical; supports stable unity-gain operation with ≤200pF capacitive load |
| Slew Rate | 21V/µs minimum; enables fast settling of 125VP-P signals within 40kHz full-power bandwidth |
| Thermal Flag Threshold | TFLAG asserts at 145°C die temperature with 5°C hysteresis; provides early warning before 150°C shutdown limit |
| Output Drive | 50mA RMS continuous per channel; requires thermal vias and exposed pad soldering for safe operation at ±70V |
Pinout & Package
Package: 16-lead 4mm × 6mm plastic QFN (UFE) with exposed V– pad (Pin 17) requiring PCB soldering for thermal management.
| 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 |
| +INA / +INB (Pins 2, 6) | Noninverting input | Same CMR as inverting inputs; guard traces recommended to prevent PCB leakage errors |
| V– (Pins 3, 7, 17) | Negative supply / thermal pad | All three must be tied together and soldered to large V– plane; primary heat path (θJC = 15°C/W) |
| V+A / V+B (Pins 14, 10) | Positive supply per channel | Independent rails allow asymmetric supply configurations; bypass with 0.1µF ceramic near each pin |
| OUTA / OUTB (Pins 13, 9) | Amplifier output | Rail-to-rail swing; avoid forward-biasing ESD diodes by limiting output beyond V+/V– |
| ODA / ODB (Pins 15, 11) | Active-low output disable | Referenced to COMA/COMB; internal 2MΩ pull-up enables output when floating |
| TFLAGA / TFLAGB (Pins 12, 8) | Open-drain thermal flag | Sinks 200µA typical when die ≥145°C; requires external pull-up to V+A/V+B or logic rail |
| COMA / COMB (Pins 16, 4) | Reference for OD/TFLAG | May float or tie to ground; defines voltage reference for OD/TFLAG logic thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-voltage op amps | Single monolithic die with shared V– and substrate; enables compact high-voltage signal chains without isolation |
| Thermal protection with hysteresis | Two independent die-temperature sensors (145°C flag + 175°C shutdown) with 5°C and 7°C hysteresis respectively |
| Low-noise precision input stage | 3.5µVP-P (0.1Hz–10Hz) and 11nV/√Hz (1kHz) enable high-resolution transducer amplification |
| Output disable with standby mode | OD assertion reduces per-channel supply current to 580µA while preserving input bias and offset stability |
| Robust input protection network | Current-limiting resistors + back-to-back diodes + Zener clamps protect against ±12V differential transients |
Applications
| Piezo Driver | Photodiode Amplifier |
|---|---|
Use Scenario: Driving high-capacitance piezoelectric actuators in precision positioning systems with ±100V swing. IC Role / Device Role / Timing Role: High-voltage, low-drift transconductance amplifier delivering controlled charge/displacement response. Use Value: 50mA output drive and 21V/µs slew rate enable sub-millisecond step response; rail-to-rail output maximizes usable voltage range. | Use Scenario: Amplifying low-current photocurrents from large-area photodiodes in optical sensing applications. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and guarded input nodes. Use Value: 50pA max input bias current minimizes dark-current-induced offset; 130dB CMRR rejects supply-coupled interference. |
| High-Voltage Regulator Error Amp | Optical Networking Bias Supply |
Use Scenario: Precision error amplification in programmable high-voltage DC-DC converters for industrial test equipment. IC Role / Device Role / Timing Role: Feedback comparator with low offset drift ensuring stable regulation across –40°C to +125°C. Use Value: ±5µV/°C max offset drift maintains <0.01% regulation accuracy over full temperature range. | Use Scenario: Generating stable bias voltages for avalanche photodiodes (APDs) in fiber-optic receivers. IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage reference buffer and gain stage. Use Value: 112dB min PSRR suppresses switching noise from adjacent DC-DC converters; 11nV/√Hz noise preserves SNR. |
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 |
|---|---|---|---|
| LT1492CS8#PBF | Single-channel, ±40V max supply, 1.5nV/√Hz noise, no thermal flag or OD pin | Limited to lower-voltage analog front-ends; lacks high-temp monitoring and output disable | Select only if supply ≤±40V and thermal safety features are unnecessary |
| OPA454AIDDA | Single-channel, ±50V max supply, 11.5nV/√Hz noise, integrated current limit, no dual-channel or TFLAG | Requires two devices for dual functionality; lacks per-channel thermal flag and COM-referenced OD | Prefer when overcurrent protection is critical and dual-channel integration is not required |
Compared with LT1492CS8#PBF and OPA454AIDDA, the LTC6091HUFE#TRPBF uniquely delivers dual-channel ±70V operation with per-amplifier thermal flag and output disable-enabling compact, thermally robust high-voltage signal conditioning without external supervision circuitry.
Availability
LTC6091HUFE#TRPBF is available at Aetrix Electronics and suitable for piezo drivers, photodiode amplifiers, and high-voltage regulator feedback loops requiring stable component supply across extended temperature ranges.
Supply support for LTC6091HUFE#TRPBF 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 low-noise signal conditioning ICs.
The LTC6091HUFE#TRPBF belongs to Linear's high-voltage precision op amp family, designed specifically for applications demanding rail-to-rail output, picoamp input bias, and robust thermal management in ±70V systems.
FAQ
What is the maximum supply voltage rating for the LTC6091HUFE#TRPBF?
The LTC6091HUFE#TRPBF has an absolute maximum total supply voltage of 150V (V+A to V– or V+B to V–), with recommended operation up to ±70V (140V total). Exceeding ±70V risks violating the guaranteed performance specifications and may accelerate long-term reliability degradation, even if within absolute maximum ratings.
Does the LTC6091HUFE#TRPBF support single-supply operation?
Yes, the LTC6091HUFE#TRPBF supports true single-supply operation - for example, with V– = 0V and V+A/V+B = +140V - provided the input common-mode and output swing remain within specified limits (V– + 3V to V+ – 3V for inputs; rail-to-rail output). The COM pins must be biased appropriately relative to the chosen reference.
How does the TFLAG pin function on the LTC6091HUFE#TRPBF?
The TFLAGA and TFLAGB pins on the LTC6091HUFE#TRPBF are open-drain outputs that sink ~200µA when their respective amplifier's die temperature reaches 145°C. They require an external pull-up resistor to V+A or V+B. Hysteresis of 5°C ensures the flag deasserts only after cooling to ~140°C, preventing oscillation near threshold.
Can the LTC6091HUFE#TRPBF drive capacitive loads without instability?
Yes - the LTC6091HUFE#TRPBF is unity-gain stable with up to 200pF capacitive load at the output. For larger loads or demanding phase-margin requirements, external compensation (e.g., feedback capacitor CF) is recommended, as shown in Figure 7 of the datasheet, to suppress peaking caused by parasitic input capacitance interacting with high-value feedback resistors.
What layout practices are essential for minimizing leakage errors with the LTC6091HUFE#TRPBF?
To minimize PCB leakage errors with the LTC6091HUFE#TRPBF, clean flux residue using solvent or soap-and-water post-soldering, use guard rings around +INA/+INB traces referenced to COM, maintain ≥10mm creepage between high-voltage nodes, and avoid conformal coating materials that absorb moisture - especially critical given that 1000GΩ leakage at ±70V generates 70pA error current.
LTC6091HUFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC6091HUFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6091HUFE#TRPBF 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#TRPBF reliable?
The price and inventory of LTC6091HUFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6091HUFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6091HUFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6091HUFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6091HUFE#TRPBF?
LTC6091HUFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6091HUFE#TRPBF 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#TRPBF?
For technical support, including LTC6091HUFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6091HUFE#TRPBF requirements.
6.How does Aetrix verify that LTC6091HUFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6091HUFE#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6091HUFE#TRPBF?
All LTC6091HUFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6091HUFE#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC6091HUFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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