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Analog Devices Inc. LTC2995HUD#TRPBF
- Part No.:
- LTC2995HUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC2995HUD#TRPBF.pdf
- Description:
- IC TEMP SENSOR VOLT MNTR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
LTC2995HUD#TRPBF from Analog Devices (formerly Linear Technology) is a high-accuracy dual supply voltage monitor and remote/internal temperature sensor IC with open-drain alert outputs. It delivers ±1°C remote diode temperature accuracy, 1.5% voltage threshold accuracy, and 3.5ms update time across –40°C to 125°C ambient, supporting thermal and power integrity monitoring in server VRMs and industrial control systems.
For engineers reviewing the LTC2995HUD#TRPBF datasheet, LTC2995HUD#TRPBF pinout, LTC2995HUD#TRPBF application, or LTC2995HUD#TRPBF equivalent, key selection criteria include its dual OV/UV monitoring capability, VPTAT output slope of 4mV/K, adjustable reset timeout via TMR capacitor, ±220μA quiescent current, and compatibility with MMBT3904-type NPN transistors as remote sensors.
Technical Context
The LTC2995HUD#TRPBF integrates a precision diode-based temperature measurement engine with series resistance cancellation, enabling accurate remote sensing over cables up to ~20m. Its VPTAT output scales linearly at 4mV/K for η = 1.004 diodes, while internal temperature sensing is enabled by tying D+ to VCC.
Two independent voltage monitors compare VH1/VL1 and VH2/VL2 against a 0.5V internal reference; alerts are generated on UV/OV open-drain outputs with programmable delay via external TMR capacitor. Threshold polarity for TO1/TO2 is configured via PS pin state (VCC/GND/open), supporting OT, UT, or mixed-mode temperature supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Remote Temp Accuracy | ±1°C (0°C to 85°C), ±1.5°C (–40°C to 0°C & 85°C to 125°C) - enables precise thermal throttling in high-reliability compute systems |
| Voltage Threshold Accuracy | ±1.5% - ensures robust undervoltage/overvoltage detection for 1.2V, 2.5V, 3.3V, and 5V rails |
| VPTAT Slope | 4 mV/K - provides direct Kelvin-to-voltage conversion for analog temperature readback without ADC scaling |
| Update Interval | 3.5 ms - supports rapid thermal event response in real-time power management loops |
| Supply Voltage Range | 2.25 V to 5.5 V - compatible with single-supply industrial and computing platforms |
| Quiescent Current | 220 μA - enables always-on monitoring in battery-backed or low-power standby modes |
| Operating Temp Range | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and telecom infrastructure |
Pinout & Package
Package: 20-lead (3mm × 3mm) plastic QFN with exposed pad (UD package). Thermal performance optimized for PCB ground connection of exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | 2.25V–5.5V main power rail; requires ≥0.1μF bypass to GND |
| GND | Ground reference | Common return for all analog/digital circuitry and exposed pad |
| D+ | Diode sense current source | Sources calibrated current into remote diode anode; tie to VCC for internal temp sensing |
| D– | Diode sense current sink | Sinks current from remote diode cathode; tie to GND for single-wire remote sensing |
| DS | Diode select input | Three-state: VCC = internal, GND = external, open = alternating - determines VPTAT source |
| PS | Polarity select input | Configures VT1/VT2 as OT-only (open), UT-only (GND), or OT/UT pair (VCC) |
| TMR | Reset delay timer | Capacitor sets alert hold time: 5ms/nF beyond 500μs base delay; tie to VCC to bypass |
| VPTAT | Temperature voltage output | 4mV/K analog output proportional to selected sensor's absolute temperature; ±200μA drive |
| VREF | Reference voltage output | 1.8V buffered reference for resistor-divider threshold programming; ±200μA load capability |
| VH1/VH2 | Voltage high inputs | Trigger UV when either falls below 0.5V - used for undervoltage detection on positive rails |
| VL1/VL2 | Voltage low inputs | Trigger OV when either rises above 0.5V - used for overvoltage detection on positive rails |
| VT1/VT2 | Temperature threshold inputs | Analog comparators set OT/UT trip points using VREF-based dividers; support hysteresis |
| TO1/TO2 | Temp alert outputs | Open-drain logic outputs pulled low on threshold breach; weak 400kΩ pull-up to VCC |
| UV/OV | Supply alert outputs | Open-drain logic outputs pulled low on UV/OV events; same weak pull-up structure as TO1/TO2 |
Key Features
| Feature | Design Value |
|---|---|
| Series resistance cancellation | Compensates for up to several hundred ohms of trace/sensor lead resistance, preserving ±1°C accuracy over long cables |
| Programmable reset timeout | Adjustable alert hold time via external TMR capacitor (5ms/nF), preventing chatter during transient thermal/voltage excursions |
| Flexible diode selection | DS pin selects internal die, external NPN/PNP, or alternates between both - enables dual-point thermal mapping |
| Low-noise VPTAT output | 0.25°C RMS noise (0.6mV) with optional digital/analog averaging - supports sub-degree resolution in critical applications |
| Input glitch rejection | Hardware filtering rejects fast transients on VH/VL/VT pins, ensuring reliable operation in electrically noisy environments |
Applications
| Server CPU Thermal Management | Industrial PLC Power Monitoring |
|---|---|
Use Scenario: Real-time core temperature tracking and VRM rail supervision in 1U rack servers. IC Role / Device Role / Timing Role: LTC2995HUD#TRPBF measures CPU die temperature via integrated sensor and monitors 1.2V core/1.8V I/O supplies simultaneously. Use Value: Enables dynamic frequency scaling and graceful shutdown before thermal runaway, leveraging ±1°C accuracy and 3.5ms update rate. |
Use Scenario: Continuous monitoring of 24V DC input and 5V logic rails in programmable logic controllers. IC Role / Device Role / Timing Role: LTC2995HUD#TRPBF detects undervoltage on 24V supply (via VH1) and overvoltage on 5V rail (via VL2), asserting UV/OV alerts. Use Value: Prevents firmware corruption and hardware damage by triggering controlled system reset within milliseconds of fault detection. |
| Automotive ADAS Sensor Hub | Network Equipment Environmental Sensing |
Use Scenario: Thermal supervision of radar MMICs and power amplifiers in autonomous driving sensor modules. IC Role / Device Role / Timing Role: LTC2995HUD#TRPBF monitors remote MMBT3904 transistor on RF front-end PCB and tracks local die temperature via D+ tied to VCC. Use Value: Supports ASIL-B compliant thermal derating using two independent thresholds (TO1 = warning, TO2 = shutdown) with configurable hysteresis. |
Use Scenario: Ambient and component-level temperature monitoring in 5G base station remote radio units. IC Role / Device Role / Timing Role: LTC2995HUD#TRPBF reads temperature from external diode near power amplifier and compares against VREF-derived VT1/VT2 thresholds. Use Value: Maintains RF performance stability by initiating cooling fan control or transmit power reduction before critical junction temperatures are exceeded. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature and dual voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6603ESA+ | Single-channel temperature sensor only; no voltage monitoring; 3-pin SOT23 package; ±2°C accuracy | Cannot replace dual-supply monitoring function; suitable only for standalone thermal sensing | Select only if voltage supervision is handled elsewhere and board space is constrained |
| TPS3808G33DBVR | Dual independent voltage supervisors only; no temperature sensing; fixed 3.3V threshold; 6-pin SOT23 | Lacks VPTAT output and diode interface; cannot perform thermal monitoring | Choose when only supply sequencing and reset generation are required |
Compared with LTC2995HUD#TRPBF, MAX6603ESA+ omits voltage supervision entirely and trades accuracy for size, while TPS3808G33DBVR provides tighter voltage threshold tolerance but zero thermal capability - neither offers the integrated analog temperature-voltage supervision of the LTC2995HUD#TRPBF.
Availability
LTC2995HUD#TRPBF is available at Aetrix Electronics and suitable for server thermal management, industrial PLC power integrity, and automotive ADAS sensor hub applications requiring stable component supply across extended temperature ranges.
Supply support for LTC2995HUD#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2995HUD#TRPBF belongs to ADI's precision monitoring IC product line, designed specifically for simultaneous high-accuracy temperature and multi-rail voltage supervision in thermally demanding, safety-critical systems.
FAQ
What is the operating temperature range of the LTC2995HUD#TRPBF?
The LTC2995HUD#TRPBF is rated for operation from –40°C to +125°C ambient temperature, matching the H-grade qualification. This makes it suitable for under-hood automotive, industrial motor drives, and telecom infrastructure where extreme thermal environments are common. The internal temperature sensor maintains ±2°C accuracy across this full range, while remote diode accuracy is ±1°C (0°C to 85°C) and ±1.5°C at temperature extremes.
How does the LTC2995HUD#TRPBF achieve ±1°C remote temperature accuracy?
The LTC2995HUD#TRPBF achieves ±1°C remote temperature accuracy through a combination of factory calibration for diode ideality factor η = 1.004, multi-current diode voltage sampling, and active series resistance cancellation. It measures the remote diode at multiple test currents, computes temperature using the ratio of voltage differences (eliminating process-dependent IS), and subtracts a dynamically generated cancellation voltage to nullify errors from trace/sensor lead resistance - verified up to several hundred ohms.
Can the LTC2995HUD#TRPBF monitor both internal and external temperature simultaneously?
The LTC2995HUD#TRPBF does not monitor internal and external temperature simultaneously in real time, but it can alternate between them. When the DS pin is left unconnected (high-impedance), the device cycles every 30ms between measuring the internal die (with D+ tied to VCC) and the external diode (with D+ sourcing current into the remote anode), causing VPTAT to toggle between the two corresponding voltages. For true concurrent monitoring, two separate LTC2995HUD#TRPBF devices are required.
What external components are required to configure voltage monitoring on the LTC2995HUD#TRPBF?
To configure voltage monitoring on the LTC2995HUD#TRPBF, three external resistors per monitored rail are required: RA connects the supply to VHn, RB connects VHn to VLn, and RC connects VLn to GND - forming a resistive divider that scales the supply voltage to the 0.5V internal comparator threshold. For a 5V ±10% rail, typical values are RA ≈ 45.3kΩ, RB ≈ 10.2kΩ, and RC ≈ 442kΩ, referenced to the 1.8V VREF output for stable threshold setting.
Does the LTC2995HUD#TRPBF support hysteresis on its temperature alerts?
Yes, the LTC2995HUD#TRPBF supports built-in hysteresis on TO1 and TO2 temperature alerts. When VPTAT crosses VT1 or VT2, the corresponding output pulls low; to release it high again, VPTAT must move an additional ~20mV (equivalent to ~5°C at 4mV/K) in the opposite direction. This hysteresis prevents output chatter during slow thermal transitions near threshold. The magnitude is fixed and not user-adjustable, but the polarity (OT vs UT) is configurable via the PS pin.
LTC2995HUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -40°C ~ 125°C, -40°C ~ 125°C
- Accuracy:
- ±2°C Local(Max), ±1.5°C Remote(Max)
- Topology:
- Comparator, Voltage Reference
- Output Type:
- Analog Voltage
- Output Alarm:
- Yes
- Output Fan:
- No
- Voltage - Supply:
- 2.25V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
LTC2995HUD#TRPBF FAQ
1.How can I place an order for LTC2995HUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2995HUD#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 LTC2995HUD#TRPBF reliable?
The price and inventory of LTC2995HUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2995HUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2995HUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2995HUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2995HUD#TRPBF?
LTC2995HUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2995HUD#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 LTC2995HUD#TRPBF?
For technical support, including LTC2995HUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2995HUD#TRPBF requirements.
6.How does Aetrix verify that LTC2995HUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2995HUD#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 LTC2995HUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2995HUD#TRPBF?
All LTC2995HUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2995HUD#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 LTC2995HUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2995HUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2995HUD#TRPBF Tags
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EMC2101-ACZL-TR
Microchip Technology
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MCP9844T-BE/MNY
Microchip Technology
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EMC2101-R-ACZL-TR
Microchip Technology
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MCP98244T-BE/MNY
Microchip Technology
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TC670ECHTR
Microchip Technology
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SE98ATP,547
NXP Semiconductors
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AMC6821SDBQR
Texas Instruments
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MAX6604AATA+T
Analog Devices Inc./Maxim Integrated
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ADT7475ARQZ-REEL
onsemi
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MAX6643LBBAEE+
Analog Devices Inc./Maxim Integrated
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MAX6684ESA+T
Analog Devices Inc./Maxim Integrated
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MAX6639AEE+
Analog Devices Inc./Maxim Integrated
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