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Product Detailed Parameters
- Description：IC COMPARATOR 1 DIFF 8DIP
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：Differential
- Number of Elements：1
- Output Type：Open-Collector, Open-Emitter
- Voltage - Supply, Single/Dual (±)：3.5V ~ 30V, ±1.75V ~ 15V
- Voltage - Input Offset (Max)：7.5mV @ ±15V
- Current - Input Bias (Max)：0.1µA @ ±15V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：300µA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：0°C ~ 70°C
- Package / Case：8-DIP (0.300", 7.62mm)
- Mounting Type：Through Hole
- Supplier Device Package：8-PDIP
- Grade：-
- Qualification：-
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Overview
The LP311P is a low-power differential comparator manufactured by Texas Instruments in an 8-pin PDIP package. It operates from supply voltages ranging from ±1.75 V to ±15 V, or a single 3.5 V to 30 V supply. The device features a typical response time of 1.2 μs and offers output drive capabilities of 25 mA. Electrical characteristics include a maximum input offset voltage of 75 mV and low input bias currents of 15 nA typical. It is characterized for operation within a temperature range of 0°C to 70°C.
Feature Summary
- Low power consumption with typical drain of 900 μW at a 5-V supply
- Strobe capability allows turning off the output regardless of input states
- Offset balancing feature minimizes input offset voltage
- Compatible with RTL-DTL, TTL, and MOS logic circuits
Applications
- Battery-powered applications requiring low current drain
- General-purpose voltage comparison where fast response is not critical
- Logic interface circuits compatible with standard digital families
Procurement Notes
Verify that the specific orderable part number matches the required PDIP package configuration. Confirm the operating temperature range aligns with the application environment, as the LP311P is rated for 0°C to 70°C. Ensure design precautions are taken to minimize stray coupling from the output to inputs or trim pins to prevent oscillation during implementation.
Selection Notes
Select this component when lower power consumption is prioritized over high-speed performance compared to standard comparators. It serves as a direct pin-compatible replacement for the LM311 series while offering significantly reduced power usage. Consider the 1.2 μs response time limitation when designing for high-frequency signal processing tasks.
Part Context
The LP311P belongs to the LP211/LP311 family of low-power differential comparators. These devices utilize stable ion-implanted resistors to achieve a 30:1 reduction in power consumption relative to the industry-standard LM311 series. The LP311 variant specifically targets commercial temperature ranges, distinguishing it from the military-grade LP211.
Replacement Considerations
The datasheet confirms interchangeability with the industry-standard LM311 due to identical pinouts.
