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Product Detailed Parameters
- Description：IC COMPARATOR 1 GEN PUR 12QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：General Purpose
- Number of Elements：1
- Output Type：LVDS
- Voltage - Supply, Single/Dual (±)：2.4V ~ 5.25V
- Voltage - Input Offset (Max)：4mV @ 5V
- Current - Input Bias (Max)：1.5µA
- Current - Output (Typ)：11mA
- Current - Quiescent (Max)：14.7mA
- CMRR, PSRR (Typ)：77dB CMRR, 80dB PSRR
- Propagation Delay (Max)：2.8ns
- Hysteresis：4.5mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：12-WFQFN Exposed Pad
- Mounting Type：Surface Mount
- Supplier Device Package：12-QFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LTC6754IUD#PBF is a high-speed rail-to-rail input comparator with LVDS-compatible outputs manufactured by Analog Devices. It operates on a supply voltage range of 2.4V to 5.25V and features a propagation delay of 1.8ns typical at 50mV overdrive. The device supports a toggle rate up to 890Mbps and includes separate VCCI and VCCO supplies for the input and output stages, respectively. Key electrical characteristics include an input offset voltage of ±0.75mV, a quiescent current of 13.4mA, and adjustable hysteresis via the LE/HYST pin.
Feature Summary
- Features rail-to-rail inputs that extend beyond both supply rails for wide common mode range.
- Provides LVDS compatible differential outputs with low jitter for high-frequency applications.
- Includes a shutdown pin to reduce power consumption and a latch function to capture comparator states.
Applications
- Clock and data recovery circuits
- High-speed line receivers and level translation
- Time domain reflectometry and time of flight measurements
Procurement Notes
Verify the specific temperature grade suffix 'I' corresponds to the industrial range (-40°C to 85°C) required for your design. Confirm the QFN package dimensions match your PCB footprint. Ensure the ordering suffix '#PBF' indicates lead-free compliance if RoHS standards are mandatory for your assembly process.
Selection Notes
Select this component when timing-critical performance with low dispersion is required. The separate input and output supply pins allow for optimized power management and noise isolation between sensitive analog inputs and digital loads. Consider the shutdown feature if power efficiency during idle periods is a system constraint.
Part Context
This part belongs to the LTC6754 family of high-speed comparators. The 'IUD' designation identifies the industrial temperature grade and the 12-lead QFN package. Other variants in the series include the HUD (high temperature) and SC6 packages, offering flexibility in thermal handling and board space requirements.
Replacement Considerations
LTC6754HUD#PBF: Higher temperature grade variant (-40°C to 125°C).
FAQ
How is hysteresis controlled in the LTC6754IUD#PBF?
Hysteresis is adjusted via the LE/HYST pin. Leaving it floating provides approximately 4.5mV of hysteresis. Applying a voltage or resistor allows adjustment from 0mV to 40mV.
What is the purpose of the separate VCCI and VCCO pins?
Separate supplies isolate the input stage from the output stage, allowing for logic level translation and reducing noise coupling between the sensitive inputs and the load.
