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Analog Devices Inc. LTC2995IUD#TRPBF
- Part No.:
- LTC2995IUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
LTC2995IUD#TRPBF.pdf
- Description:
- IC TEMP SENSOR VOLT MNTR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,242
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Product details
Overview
LTC2995IUD#TRPBF from Analog Devices (formerly Linear Technology) is a precision dual supply voltage monitor and remote/internal temperature sensor IC with open-drain alert outputs. It delivers ±1°C remote diode temperature accuracy, ±2°C internal die temperature accuracy, and ±1.5% voltage threshold accuracy across –40°C to +85°C, operating from 2.25V to 5.5V. It supports real-time monitoring of CPU core voltage, I/O rail, and thermal zones in network servers and embedded computing systems.
For engineers reviewing the LTC2995IUD#TRPBF datasheet, LTC2995IUD#TRPBF pinout, LTC2995IUD#TRPBF application, or LTC2995IUD#TRPBF equivalent, key selection considerations include its 3.5ms temperature update interval, 4mV/K VPTAT slope calibrated for η = 1.004 diodes, series resistance cancellation up to several hundred ohms, adjustable reset timeout via TMR capacitor, and dual OV/UV detection on two independent voltage channels.
Technical Context
The LTC2995IUD#TRPBF integrates a high-precision ΔΣ-based temperature-to-voltage converter with dual independent voltage comparators referenced to an internal 0.5V threshold and a buffered 1.8V reference (VREF). It uses multi-current diode sensing with series resistance cancellation logic to reject errors from PCB trace resistance and noise.
Its alert architecture features four open-drain outputs-TO1, TO2, UV, and OV-with programmable hysteresis (2–10°C for temperature, fixed for voltage) and capacitor-adjustable timeout (0.5–20ms), enabling flexible fault response timing without external timers or microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Remote Temp Accuracy | ±1°C over 0°C to 85°C - enables precise thermal throttling in CPUs/FPGAs without calibration |
| Internal Temp Accuracy | ±2°C over –40°C to +85°C - sufficient for system-level ambient or junction monitoring |
| Voltage Threshold Accuracy | ±1.5% - ensures reliable detection of 5V ±10% or 3.3V ±5% supply deviations |
| VPTAT Output Slope | 4 mV/K (η = 1.004) - directly converts Kelvin to voltage for analog temperature readback |
| Supply Current | 220 μA typical - supports always-on thermal supervision in low-power embedded systems |
| Update Interval | 3.5 ms - fast enough for dynamic thermal event capture (e.g., CPU burst load) |
| Operating Voltage | 2.25V to 5.5V - compatible with 3.3V and 5V system rails without level shifting |
Pinout & Package
Package: 20-lead (3mm × 3mm) plastic QFN with exposed pad (UD package); RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 2.25V–5.5V; requires ≥0.1μF bypass to GND |
| GND | Ground reference | Primary return path for all analog/digital circuits; exposed pad may be connected |
| D+, D– | Remote diode sense terminals | D+ sources current; D– sinks current; 470pF bypass required for noise immunity |
| DS | Diode select input | Three-state: VCC = internal sensor, GND = external sensor, open = alternating |
| PS | Polarity select input | Configures VT1/VT2 as UT/OT, OT/OT, or UT/UT thresholds |
| TMR | Reset timeout timer | Capacitor-to-GND sets alert hold time (0.5–20ms); open = 500μs min |
| VPTAT | Temperature voltage output | Analog output proportional to absolute temperature (4mV/K); ±200μA drive |
| VREF | Reference voltage output | 1.8V ±3mV; used to set VT1/VT2 and VHn/VLn thresholds via resistor dividers |
| VT1, VT2 | Temperature threshold inputs | Compare against VPTAT; polarity set by PS; hysteresis ≈20mV |
| VH1, VL1, VH2, VL2 | Voltage monitor inputs | VHn triggers UV if <0.5V; VLn triggers OV if >0.5V; each pair monitors one rail |
| TO1, TO2, UV, OV | Open-drain alert outputs | Pull low on threshold violation; weak 400kΩ pull-up to VCC; support external pull-ups >VCC |
Key Features
| Feature | Design Value |
|---|---|
| Series resistance cancellation | Compensates for up to ~300Ω trace resistance between IC and remote diode, preserving ±1°C accuracy over long cables |
| Programmable alert timeout | TMR capacitor adjusts UV/OV/TOx hold time from 0.5ms to 20ms, eliminating need for external RC timers or firmware debouncing |
| Single-wire remote sensing | D– tied to remote GND enables simplified 2-wire cabling while maintaining DC ground shift tolerance (<300mV) |
| Glitch-rejected voltage monitoring | Input filtering rejects short transients; 5mV overdrive yields <2ms response, preventing false trips on supply ripple |
| Low-noise VPTAT output | 0.15°C RMS noise; supports analog averaging for sub-0.02°C resolution in environmental monitoring |
Applications
| Core Voltage Monitoring | I/O Rail Supervision |
|---|---|
Use Scenario: Real-time tracking of 1.2V CPU core supply during dynamic frequency scaling in server processors. IC Role / Device Role / Timing Role: LTC2995IUD#TRPBF monitors VH1/VL1 for undervoltage (UV) and overvoltage (OV) events with 1.5% threshold accuracy and 3.5ms update rate. Use Value: Prevents processor lockup or data corruption by asserting UV/OV alerts before supply excursion exceeds JEDEC limits. |
Use Scenario: Continuous supervision of 3.3V PCIe slot I/O voltage in industrial edge gateway hardware. IC Role / Device Role / Timing Role: LTC2995IUD#TRPBF uses VH2/VL2 inputs to detect brownout or overvoltage conditions, triggering system reset via UV/OV outputs. Use Value: Enables fail-safe shutdown before interface ICs experience latch-up or EEPROM corruption. |
| Server Board Thermal Management | Environmental Sensor Node |
Use Scenario: Dual-point thermal monitoring using internal die temperature and external MMBT3904 transistor on GPU heatsink. IC Role / Device Role / Timing Role: LTC2995IUD#TRPBF alternates between internal and remote sensors (DS open), generating VPTAT updates every 30ms and driving TO1/TO2 on OT/UT thresholds. Use Value: Provides early warning (TO1) at 75°C and critical alarm (TO2) at 95°C with 2°C hysteresis, enabling staged fan control. |
Use Scenario: Battery-powered wireless sensor node measuring ambient temperature and battery voltage in smart building HVAC. IC Role / Device Role / Timing Role: LTC2995IUD#TRPBF supplies VPTAT for analog ADC sampling and VREF for ADC reference, while monitoring VBAT via VH1/VL1. Use Value: Achieves <1°C thermal accuracy and <2% voltage accuracy at 220μA quiescent current, extending battery life beyond 5 years. |
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 temperature-only nodes | Select only when voltage supervision is handled separately |
| TPS3808G18DBVR | Dual independent voltage supervisor only; no temperature sensing; 6-pin SOT23; ±0.5% threshold accuracy | Lacks VPTAT output and diode interface; cannot perform thermal monitoring | Choose when temperature sensing is unnecessary and higher voltage accuracy is required |
Compared with MAX6603ESA+ and TPS3808G18DBVR, the LTC2995IUD#TRPBF uniquely integrates both functions in one 3mm × 3mm QFN, reducing BOM count and PCB area while delivering coordinated thermal/voltage fault reporting through shared alert timing and reference resources.
Availability
LTC2995IUD#TRPBF is available at Aetrix Electronics and suitable for network servers, desktop/notebook computers, and environmental monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2995IUD#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 LTC2995IUD#TRPBF belongs to ADI's precision monitoring IC product line, designed specifically for compact, low-power systems needing simultaneous analog temperature readback and dual-rail voltage supervision without microcontroller dependency.
FAQ
What is the operating temperature range of the LTC2995IUD#TRPBF?
The LTC2995IUD#TRPBF is rated for operation from –40°C to +85°C (Industrial grade). Its internal temperature sensor maintains ±2°C accuracy across this full range, and its remote diode measurement achieves ±1°C accuracy from 0°C to 85°C. The device also supports storage from –65°C to +150°C, making it suitable for harsh-environment deployments where thermal cycling is expected.
How does the LTC2995IUD#TRPBF handle series resistance in remote diode traces?
The LTC2995IUD#TRPBF implements active series resistance cancellation using a third current measurement to extract and subtract the IR drop error from the diode voltage reading. This allows accurate temperature measurement even with trace resistances up to several hundred ohms - verified in Typical Performance Characteristics (Figure G05). For example, at 100Ω series resistance, the residual error remains within ±0.25°C across the full temperature range.
Can the LTC2995IUD#TRPBF monitor both internal and external temperature simultaneously?
The LTC2995IUD#TRPBF does not monitor both temperatures simultaneously in real time. When the DS pin is left unconnected, it alternates measurements - updating VPTAT with internal temperature for 30ms, then external temperature for 30ms. This 60ms cycle enables dual-zone awareness without additional ICs, but VPTAT reflects only one sensor at any instant. For true concurrent monitoring, two separate LTC2995IUD#TRPBF devices are required.
What is the purpose of the VREF pin on the LTC2995IUD#TRPBF?
The VREF pin on the LTC2995IUD#TRPBF provides a precision 1.8V ±3mV output used to set temperature thresholds (VT1, VT2) and voltage monitor thresholds (VH1/VL1, VH2/VL2) via external resistor dividers. It can source/sink ±200μA and drive up to 1000pF capacitance. Its tight regulation (±1.5mV load variation) ensures stable, repeatable trip points across supply and temperature variations - critical for deterministic system-level fault response.
Does the LTC2995IUD#TRPBF require external components for basic operation?
Yes - the LTC2995IUD#TRPBF requires at minimum: (1) a 0.1μF ceramic capacitor from VCC to GND; (2) a 470pF capacitor between D+ and D– for noise suppression; and (3) resistor dividers to set VT1/VT2 and VHn/VLn thresholds using VREF. Optional components include a capacitor on TMR for timeout adjustment and external pull-ups on TO1/TO2/OV/UV if driving loads above the internal 400kΩ pull-up strength. No external oscillator or calibration circuitry is needed.
LTC2995IUD#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 ~ 85°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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
LTC2995IUD#TRPBF FAQ
1.How can I place an order for LTC2995IUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2995IUD#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 LTC2995IUD#TRPBF reliable?
The price and inventory of LTC2995IUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2995IUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2995IUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2995IUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2995IUD#TRPBF?
LTC2995IUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2995IUD#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 LTC2995IUD#TRPBF?
For technical support, including LTC2995IUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2995IUD#TRPBF requirements.
6.How does Aetrix verify that LTC2995IUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2995IUD#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 LTC2995IUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2995IUD#TRPBF?
All LTC2995IUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2995IUD#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 LTC2995IUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2995IUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2995IUD#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
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MAX6639AEE+
Analog Devices Inc./Maxim Integrated
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