ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：1
- 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)：40mA
- Current - Quiescent (Max)：4.4µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：15µs
- Hysteresis：50mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SO
- Grade：-
- Qualification：-
Download product information
Overview
The LTC1440IS8#PBF is a micropower single comparator with an integrated 1.182V reference, housed in an 8-lead SO package. It operates from a single 2V to 11V supply or dual ±1V to ±5.5V supply. The device features a typical supply current of 2.1µA and a propagation delay of 12µs with 10mV overdrive. The CMOS output stage can source up to 40mA continuously without generating crowbar switching currents during logic transitions.
Feature Summary
- Integrated 1.182V bandgap reference capable of driving a 0.01µF bypass capacitor directly
- Glitch-free CMOS output stage that eliminates cross-conducting current during state changes
- Wide input common mode range extending from the negative supply to within 1.3V of the positive supply
Applications
- Battery-powered system monitoring
- Micropower threshold detectors
- Window comparators
- Oscillator circuits
Procurement Notes
Verify the IS8 suffix indicates the industrial temperature grade (–40°C to 85°C) and the #PBF designation confirms lead-free compliance. Confirm the specific package outline matches the 8-lead plastic small outline dimensions provided in the datasheet before finalizing procurement specifications.
Selection Notes
Select this component for applications requiring ultralow quiescent current consumption alongside high output drive capability. The built-in reference simplifies circuit design by removing external voltage references. Ensure the supply voltage remains above 2V for guaranteed performance, as lower voltages may degrade the reference accuracy and increase propagation delay.
Part Context
This part belongs to the LTC1440/LTC1441/LTC1442 family of ultralow power comparators. While the LTC1440 provides a single comparator with a reference, the LTC1441 offers dual comparators without a reference, and the LTC1442 provides dual comparators with a reference. All variants share similar electrical characteristics and pinout configurations.
Replacement Considerations
The datasheet identifies MAX921, MAX922, and MAX923 as pin-compatible upgrades. Verify that the substitute device meets the specific supply current and output drive requirements of the original design.
FAQ
Can the internal reference drive large capacitive loads?
The reference can drive a bypass capacitor of up to 0.01µF without oscillation. For larger capacitance values, a series damping resistor must be inserted between the REF pin and the capacitor.
How does the output stage handle switching transients?
The comparator output stage is designed to eliminate the cross-conducting current that typically occurs when changing logic states, thereby preventing power supply glitches.
