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Analog Devices Inc. LT6703HDC-2#TRPBF
- Part No.:
- LT6703HDC-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 3-WFDFN Exposed Pad
- Datasheet:
-
LT6703HDC-2#TRPBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 3DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,703
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Product details
Overview
LT6703HDC-2#TRPBF from Analog Devices (formerly Linear Technology) is an inverting-input micropower supply voltage monitor IC with integrated 400mV reference, designed for battery-powered system monitoring and threshold detection. It operates from 1.4V to 18V supply, draws only 6.5μA typical quiescent current at 5V, features 6.5mV typical internal hysteresis, and delivers open-collector output capable of sinking ≥5mA with output voltage tolerance up to 18V - ideal for automotive monitor and control systems requiring stable low-power supervision.
For engineers reviewing the LT6703HDC-2#TRPBF datasheet, LT6703HDC-2#TRPBF pinout, LT6703HDC-2#TRPBF application, or LT6703HDC-2#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating temperature range, inverting input polarity, 3-pin DFN (2mm × 2mm) package with exposed GND pad, ±10nA max input bias current, and guaranteed 70mV max output low voltage at 5mA sink current.
Technical Context
The LT6703HDC-2#TRPBF implements a precision comparator architecture where one input is fixed to an internal 400mV reference and the external inverting input determines threshold crossing behavior. Its Over-The-Top® input stage allows the input voltage to operate from GND to 18V independent of supply voltage, enabling direct sensing of high-side rail voltages without level-shifting circuitry.
Internal hysteresis (6.5mV typ) ensures noise immunity during threshold transitions, while the open-collector output supports level translation across voltage domains - e.g., sinking load referenced to 12V or 15V even when VS = 1.8V. The device is fully specified over –40°C to 125°C, with total rising threshold error ≤±1.25% at 25°C and guaranteed performance across its full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4V to 18V - enables operation directly from single-cell Li-ion (3.0–4.2V), 5V rails, or 12V automotive systems without regulation. |
| Rising Input Threshold | 395–405mV at 25°C - precise 400mV reference enables accurate undervoltage lockout (UVLO) at defined system thresholds. |
| Hysteresis | 3.5–9.5mV - prevents chatter near threshold due to noise or slow-rising inputs; eliminates need for external feedback resistors. |
| Quiescent Current | 6.5μA typ at 5V - extends battery life in always-on monitoring applications such as handheld instruments or remote sensors. |
| Input Bias Current | ±10nA max - minimizes loading on high-impedance divider networks used for rail sensing. |
| Output Sink Capability | ≥5mA at VOL ≤200mV - drives LEDs, MOSFET gates, or logic inputs directly without external buffer stages. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial control, and harsh-environment embedded systems. |
Pinout & Package
LT6703HDC-2#TRPBF uses a 3-lead (2mm × 2mm) plastic DFN package with exposed thermal pad (Pin 4 = GND, soldered to PCB). The package supports high-density layouts and efficient thermal dissipation in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT | Open-collector comparator output | Sinks current to GND; supports pull-up to any voltage ≤18V regardless of VS - enables level translation and wire-AND logic. |
| VS | Positive supply input | Accepts 1.4V–18V; requires 0.1μF bypass capacitor to GND; supplies internal reference and comparator core. |
| –IN | Inverting input terminal | External input connected to voltage divider; output goes low when –IN exceeds 400mV reference - configured for active-low alarm. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 400mV reference | Eliminates external reference IC or resistor divider drift; reduces BOM count and layout area in UVLO circuits. |
| Inverting input configuration | Provides natural active-low output response for undervoltage detection - simplifies interface to reset controllers or enable pins. |
| Over-The-Top® input range | Allows –IN to swing from GND to 18V independently of VS - enables direct sensing of higher-voltage rails without attenuators. |
| Guaranteed hysteresis | 6.5mV typical built-in hysteresis ensures stable switching without external components - critical for noisy automotive or industrial environments. |
| Exposed GND pad | Improves thermal performance and reduces ground impedance - essential for maintaining accuracy and reliability at 125°C junction temperature. |
Applications
| Battery-Powered System Monitoring | Threshold Detectors |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage in portable medical devices to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) supervisor with inverting input detecting battery sag below 3.0V via resistor divider. Use Value: 6.5μA quiescent current preserves standby runtime; 400mV reference + hysteresis prevents false triggers during transient load pulses. | Use Scenario: Detecting overtemperature condition in motor drive PCB using NTC thermistor voltage divider. IC Role / Device Role / Timing Role: Precision comparator comparing thermistor output against fixed 400mV threshold to assert fault signal. Use Value: ±10nA input bias avoids measurement error in high-impedance thermistor networks; wide supply range accommodates 3.3V or 5V controller rails. |
| Relay Driving | Automotive Monitor and Controls |
Use Scenario: Controlling 12V relay coil in HVAC control panel based on 5V logic-level signal conditioning. IC Role / Device Role / Timing Role: Level-translating comparator driving relay driver transistor with open-collector output pulled to 12V. Use Value: Output tolerates 12V pull-up while powered from 5V VS - eliminates need for separate level shifter IC or optocoupler. | Use Scenario: Supervising 12V battery rail in engine control unit (ECU) to detect cranking undervoltage or alternator failure. IC Role / Device Role / Timing Role: Inverting-input monitor asserting fault flag when battery drops below 11.5V (set by resistor divider). Use Value: –40°C to 125°C rating ensures operation in under-hood environments; 18V absolute max input withstands load dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6703HDC-3#TRPBF | Noninverting input configuration; identical specs otherwise (same package, temp range, reference, hysteresis). | Outputs high when input exceeds threshold - suited for active-high reset or enable signals. | Select LT6703HDC-3#TRPBF when system logic requires high-asserted fault indication or direct interface to microcontroller wake-up pins. |
| TLV7032IDR | Lower supply current (350nA), no internal reference, requires external 400mV source; SOT-23-6 package; –40°C to 125°C. | Lacks integrated reference - increases design complexity and component count for precision thresholding. | Choose TLV7032IDR only if ultra-low power (<1μA) dominates over BOM simplicity and reference accuracy requirements. |
Compared with LT6703HDC-3#TRPBF, the LT6703HDC-2#TRPBF provides inverted logic polarity essential for active-low reset generation, while TLV7032IDR trades integration for nanowatt quiescent current - making LT6703HDC-2#TRPBF optimal for robust, reference-free, low-component-count voltage supervision in automotive and industrial settings.
Availability
LT6703HDC-2#TRPBF is available at Aetrix Electronics and suitable for battery-powered system monitoring, automotive monitor and controls, and industrial control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT6703HDC-2#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 legacy of high-performance analog ICs for precision signal conditioning, power management, and sensing applications.
The LT6703 family is part of Linear's micropower comparator product line, engineered specifically for low-power voltage supervision in space- and energy-constrained systems such as automotive electronics, portable instrumentation, and industrial IoT edge nodes.
FAQ
What is the function of the LT6703HDC-2#TRPBF in a voltage monitoring circuit?
The LT6703HDC-2#TRPBF functions as an inverting-input voltage monitor with integrated 400mV reference. When the external –IN voltage exceeds the internal reference, the open-collector output pulls low - enabling precise undervoltage detection without external reference components. Its 6.5μA quiescent current and –40°C to 125°C rating make LT6703HDC-2#TRPBF ideal for automotive and industrial supervision tasks where reliability and low power are critical.
Can the LT6703HDC-2#TRPBF be used with supply voltages below 1.4V?
No, the LT6703HDC-2#TRPBF has a minimum specified supply voltage of 1.4V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this voltage is not guaranteed and may result in undefined comparator behavior or failure to assert output states correctly. For sub-1.4V applications, alternative solutions such as the TLV7032 series should be evaluated.
How does the hysteresis in the LT6703HDC-2#TRPBF improve system stability?
The LT6703HDC-2#TRPBF incorporates 6.5mV typical internal hysteresis to prevent oscillation during slow or noisy threshold crossings. This built-in hysteresis creates distinct rising (≈400mV) and falling (≈393.5mV) input thresholds, eliminating the need for external positive feedback networks. As a result, LT6703HDC-2#TRPBF delivers clean, chatter-free output transitions in electrically noisy environments like automotive power systems or industrial motor controls.
Is the LT6703HDC-2#TRPBF pin-compatible with other variants in the LT6703 family?
Yes, the LT6703HDC-2#TRPBF shares identical 3-lead DFN (2mm × 2mm) pinout with LT6703HDC-3#TRPBF, LT6703IDC-2#TRPBF, and LT6703CDC-2#TRPBF. All use OUT–VS––IN (or +IN) pin assignments in the same physical layout. However, functional compatibility depends on input polarity and temperature grade - LT6703HDC-2#TRPBF must be substituted only with other H-grade (–40°C to 125°C) -2 variants for drop-in replacement.
What is the maximum output sink current specification for the LT6703HDC-2#TRPBF?
The LT6703HDC-2#TRPBF guarantees ≥5mA output sink current with VOL ≤200mV at 5V supply and 10mV input overdrive, per Electrical Characteristics table. Typical performance reaches 40mA sink capability, but design margin should be based on the guaranteed 5mA spec. Exceeding 5mA continuously requires thermal evaluation - the 2mm × 2mm DFN package has θJA = 102°C/W, and junction temperature must remain ≤125°C.
LT6703HDC-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 3-WFDFN Exposed Pad
- Series:
- Over-The-Top®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 1.4V ~ 18V
- :
- -
- Voltage - Input Offset (Max):
- 0.01µA @ 18V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 17µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 29µs
- Propagation Delay (Max):
- 13.5mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 3-DFN (2x2)
LT6703HDC-2#TRPBF FAQ
1.How can I place an order for LT6703HDC-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6703HDC-2#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 LT6703HDC-2#TRPBF reliable?
The price and inventory of LT6703HDC-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6703HDC-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6703HDC-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6703HDC-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6703HDC-2#TRPBF?
LT6703HDC-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6703HDC-2#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 LT6703HDC-2#TRPBF?
For technical support, including LT6703HDC-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6703HDC-2#TRPBF requirements.
6.How does Aetrix verify that LT6703HDC-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6703HDC-2#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 LT6703HDC-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6703HDC-2#TRPBF?
All LT6703HDC-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6703HDC-2#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 LT6703HDC-2#TRPBF part is unused and in its original packaging.
Return procedure for LT6703HDC-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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