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Analog Devices Inc. LTC6091IUFE#TRPBF
- Part No.:
- LTC6091IUFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC6091IUFE#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:895
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Product details
Overview
LTC6091IUFE#TRPBF 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 LTC6091IUFE#TRPBF datasheet, LTC6091IUFE#TRPBF pinout, LTC6091IUFE#TRPBF application, or LTC6091IUFE#TRPBF equivalent, key selection criteria include guaranteed 130dB CMRR over ±67V common-mode range, thermal warning flag (TFLAG) activation at 145°C, and independent output disable (OD) per channel referenced to COM pins - critical for safe high-voltage system control and fault management.
Technical Context
The LTC6091IUFE#TRPBF integrates two fully independent high-voltage op-amp channels on a single monolithic CMOS die, sharing only V– and substrate. Each channel features a low-noise, picoamp-input-stage with 11nV/√Hz noise density and 3.5µVP-P 0.1Hz–10Hz noise, enabling precision signal conditioning in high-gain configurations without significant offset drift (±5µV/°C max).
Its rail-to-rail output stage supports ±70V supplies while maintaining 50mA sink/source capability and unity-gain stability with up to 200pF capacitive load. Thermal protection includes dual independent die-temperature sensors (145°C TFLAG assertion, 5°C hysteresis) and secondary shutdown at ~175°C, with OD pins allowing logic-level control of output enable/disable per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.75V to ±70V (140V total); enables direct interface with high-voltage rails without external level-shifting. |
| Input Bias Current | 50pA maximum; ensures minimal error in high-impedance sensor interfaces like photodiodes or piezoelectric transducers. |
| Input Offset Voltage | 1.25mV maximum; supports accurate DC-coupled amplification in closed-loop systems such as HV regulators. |
| CMRR | 130dB minimum over ±67V common-mode range; maintains accuracy when amplifying small signals riding on large common-mode voltages. |
| Slew Rate | 21V/µs; allows fast settling of high-amplitude outputs (e.g., 125VP-P) within bandwidth-limited applications like optical networking drivers. |
| Thermal Flag Threshold | 145°C die temperature; provides early warning before thermal shutdown, enabling proactive system derating or fault logging. |
| Output Disable Logic | Active-low OD pin referenced to COM; permits safe, low-voltage (e.g., 3.3V/5V) control of HV output stages without level shifters. |
Pinout & Package
Package: 16-lead 4mm × 6mm plastic QFN (UFE) with exposed V– pad (Pin 17) requiring soldering to PCB ground plane for thermal management (θJC = 15°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –INA / –INB (Pins 1, 5) | Inverting Input | Accepts input signals from V– + 3V to V+ – 3V; protected by back-to-back diodes and current-limiting resistors. |
| +INA / +INB (Pins 2, 6) | Noninverting Input | Same common-mode range as inverting inputs; low-leakage path critical for pA-level bias current performance. |
| V– (Pins 3, 7, 17) | Negative Supply / Thermal Pad | Shared substrate reference; exposed pad must be soldered to V– plane for thermal conduction and EMI reduction. |
| V+A / V+B (Pins 14, 10) | Positive Supply (per channel) | Independent positive rails allow unbalanced supply configurations (e.g., +100V/–40V) without cross-channel interference. |
| OUTA / OUTB (Pins 13, 9) | Amplifier Output | Rail-to-rail stage capable of sourcing/sinking 50mA; avoid forward-biasing internal ESD diodes beyond V± rails. |
| ODA / ODB (Pins 15, 11) | Output Disable (active low) | Referenced to COM pin; internal 2MΩ pull-up enables output by default; logic-compatible with 1.8V–5V systems via COM. |
| TFLAGA / TFLAGB (Pins 12, 8) | Open-Drain Thermal Warning | Sinks 200µA typical when die temp ≥145°C; hysteresis ensures stable flag deassertion at ~140°C. |
| COMA / COMB (Pins 16, 4) | Reference for OD/TFLAG | May float or tie to local ground; defines voltage reference for OD logic thresholds and TFLAG output swing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-voltage amplifiers | Two matched channels on one die with shared V– but separate V+, enabling isolated high-voltage signal paths in compact layout. |
| Rail-to-rail output with 50mA drive | Delivers full dynamic range across ±70V rails while driving reactive or resistive loads up to 50mA RMS without clipping. |
| Ultra-low input bias current (50pA max) | Minimizes voltage error in high-Z sensor interfaces (e.g., photodiodes, pH electrodes), preserving signal integrity in precision measurement. |
| Integrated thermal monitoring & protection | Dual independent TFLAG outputs and secondary 175°C shutdown prevent catastrophic failure during overload or poor heatsinking. |
| Logic-compatible output disable | OD pins accept standard LVCMOS/LVTTL levels when referenced to COM, eliminating need for external level translators in mixed-voltage systems. |
Applications
| Photodiode Amplifier | Piezo Driver |
|---|---|
|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in spectroscopy or medical imaging systems operating under ±70V bias. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and low 1/f noise to preserve SNR in DC–10kHz signal chains. Use Value: 50pA max input bias avoids saturation in >1GΩ feedback networks; 3.5µVP-P 0.1–10Hz noise ensures stable baseline for low-frequency light detection. |
Use Scenario: Driving high-capacitance piezoelectric actuators in precision positioning stages requiring ±100V swing and fast step response. IC Role / Device Role / Timing Role: High-slew-rate voltage driver delivering controlled charge/discharge to piezo capacitance with rail-to-rail compliance. Use Value: 21V/µs slew rate enables <1µs settling for 100V steps; 50mA output sustains drive into 100nF loads without droop or oscillation. |
| High-Voltage Regulator Feedback | Optical Networking Transimpedance |
|
Use Scenario: Closed-loop sensing and correction in ±60V linear regulators powering RF power amplifiers or test equipment. IC Role / Device Role / Timing Role: Precision error amplifier comparing regulated output against reference, rejecting ripple via high PSRR (112dB min). Use Value: 1.25mV max offset and ±5µV/°C drift ensure <0.1% regulation error over temperature; 130dB CMRR rejects supply noise coupling. |
Use Scenario: Converting photocurrent from PIN photodiodes in 10Gbps+ fiber receivers where bandwidth and linearity are critical. IC Role / Device Role / Timing Role: High-speed transimpedance amplifier with 12MHz GBW and optimized stability for 200pF capacitive loads. Use Value: Unity-gain stable with 200pF output capacitance eliminates need for external compensation; 11nV/√Hz noise density preserves BER in low-light conditions. |
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 |
|---|---|---|---|
| LT1492IS8#PBF | Single-channel, ±40V max supply, 1.5MHz GBW, 1.5V/µs slew rate, 250pA IB | Limited to lower voltage (<±40V) and bandwidth; insufficient for >10MHz photodiode or piezo drive requirements | Select only for cost-sensitive, low-voltage (<±36V), low-bandwidth applications where pA-level bias current is not required. |
| OPA454AIDDA | Single-channel, ±50V max supply, 2.5MHz GBW, 12V/µs slew rate, 20pA IB, no TFLAG or OD | Lacks dual-channel integration, thermal flag, and output disable; requires external circuitry for fault management | Choose when single-channel operation suffices and board space allows discrete thermal monitoring; not drop-in for LTC6091IUFE#TRPBF dual-channel safety features. |
Compared with LT1492IS8#PBF and OPA454AIDDA, the LTC6091IUFE#TRPBF uniquely combines dual-channel 140V operation, picoamp input bias, integrated thermal flag per channel, and logic-referenced output disable - enabling compact, self-protecting high-voltage analog front-ends without external supervision circuitry.
Availability
LTC6091IUFE#TRPBF is available at Aetrix Electronics and suitable for photodiode amplification, piezo actuator driving, and high-voltage regulator feedback applications requiring stable component supply, long-term manufacturability, and guaranteed industrial temperature range (–40°C to +85°C).
Supply support for LTC6091IUFE#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LTC6091IUFE#TRPBF belongs to ADI's precision high-voltage op-amp product line, engineered specifically for demanding applications including scientific instrumentation, medical imaging, industrial automation, and optical communications where wide supply range, ultra-low input current, and robust thermal management are essential.
FAQ
What is the maximum supply voltage rating for the LTC6091IUFE#TRPBF?
The LTC6091IUFE#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 specified electrical characteristics and may accelerate parametric drift or reduce reliability. The device is characterized and guaranteed over ±4.75V to ±70V.
Does the LTC6091IUFE#TRPBF support single-supply operation?
Yes, the LTC6091IUFE#TRPBF supports true single-supply operation. Its input common-mode range extends from V– + 3V to V+ – 3V, and its rail-to-rail output can swing within 10mV of either rail. For example, with V+ = +140V and V– = 0V, the device operates with inputs from +3V to +137V and outputs from near 0V to near +140V - ideal for high-side sensing and driving.
How does the thermal warning flag (TFLAG) function on the LTC6091IUFE#TRPBF?
The LTC6091IUFE#TRPBF features two independent open-drain TFLAG pins (TFLAGA and TFLAGB), each asserting low when its respective amplifier's die temperature reaches ~145°C. Each sinks ~200µA when active and exhibits ~5°C hysteresis, deasserting at ~140°C. TFLAG pins are referenced to their corresponding COM pins and require an external pull-up resistor to define logic-high level.
Can the LTC6091IUFE#TRPBF drive capacitive loads, and what is the maximum stable value?
Yes, the LTC6091IUFE#TRPBF is unity-gain stable with up to 200pF of capacitive load at the output. This is explicitly verified in the datasheet and enables direct driving of cables, piezo elements, or ADC input capacitors without external isolation resistors. For loads >200pF, series output resistance or feedback capacitor compensation (e.g., 2–4pF) is recommended to maintain phase margin.
What is the purpose of the COM pin on the LTC6091IUFE#TRPBF, and how should it be connected?
The COM pin (COMA/COMB) on the LTC6091IUFE#TRPBF serves as the local reference for the OD (output disable) and TFLAG pins. It may be left floating, tied to local ground, or connected to a low-voltage control node. Its voltage defines the logic thresholds for OD activation and the output swing range of TFLAG. Absolute maximum ratings require OD–COM and TFLAG–COM to remain between –3V and +7V.
LTC6091IUFE#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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32(16)-QFN (4x6)
LTC6091IUFE#TRPBF FAQ
1.How can I place an order for LTC6091IUFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6091IUFE#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 LTC6091IUFE#TRPBF reliable?
The price and inventory of LTC6091IUFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6091IUFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6091IUFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6091IUFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6091IUFE#TRPBF?
LTC6091IUFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6091IUFE#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 LTC6091IUFE#TRPBF?
For technical support, including LTC6091IUFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6091IUFE#TRPBF requirements.
6.How does Aetrix verify that LTC6091IUFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6091IUFE#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 LTC6091IUFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6091IUFE#TRPBF?
All LTC6091IUFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6091IUFE#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 LTC6091IUFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC6091IUFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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