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Product Detailed Parameters
- Description：IC COMPARATOR 4 W/VOLT REF 16DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：4
- Output Type：CMOS, TTL
- Voltage - Supply, Single/Dual (±)：2V ~ 11V, ±1V ~ 5.5V
- Voltage - Input Offset (Max)：10mV @ 5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：0.015mA @ 5V
- Current - Quiescent (Max)：8.5µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：12µs
- Hysteresis：50mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：16-WFDFN Exposed Pad
- Mounting Type：Surface Mount
- Supplier Device Package：16-DFN (5x4)
- Grade：-
- Qualification：-
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Overview
The LTC1445IDHD#PBF is an ultralow power quad comparator with a built-in reference, housed in a 16-lead (5mm × 4mm) plastic DFN package. It operates from a single 2V to 11V supply or dual ±1V to ±5.5V supply. The device features a 1.221V ±1% internal reference, programmable hysteresis via the HYST pin, and TTL/CMOS compatible outputs capable of sourcing up to 40mA. Supply current is typically 8µA, with propagation delay at 12µs for 10mV overdrive.
Feature Summary
- Integrates a precision 1.221V internal voltage reference with adjustable hysteresis capability
- Delivers ultralow quiescent current consumption suitable for battery-powered applications
- Features CMOS outputs that source up to 40mA while eliminating crowbar switching currents
Applications
- Battery-powered system monitoring
- Threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the specific ID suffix indicates the industrial temperature range of –40°C to 85°C. Confirm the DHD package designation matches the required 16-lead DFN footprint. Ensure the #PBF suffix confirms lead-free compliance. Cross-reference the datasheet revision history for any updates to electrical characteristics or application notes before finalizing procurement specifications.
Selection Notes
Select this component when low power consumption is critical alongside the need for multiple comparator channels. The integrated reference eliminates external resistor dividers for threshold setting. Programmable hysteresis simplifies noise immunity design. Verify input common mode range requirements against the specified V– to V+ – 1.3V limits for the target supply voltage.
Part Context
This part belongs to the LTC1443/LTC1444/LTC1445 family of ultralow power quad comparators. The LTC1445 variant specifically provides TTL/CMOS outputs and a 1.221V reference, distinguishing it from the LTC1443 which has separate ground and the LTC1444 which features open-drain outputs. All variants share the same core architecture and low-power characteristics.
Replacement Considerations
LTC1443IDHD#PBF and LTC1444IDHD#PBF are pin-compatible upgrades within the same family. Note that output stage configurations differ: LTC1443 uses split supply ground, while LTC1444 utilizes open-drain outputs. Verify circuit compatibility with these output variations before substitution.
