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TS3702IPT TS3702IPT 50392 STMicroelectronics IC COMPARATOR 2 GEN PUR 8TSSOP 8-TSSOP (0.173", 4.40mm Width)
MCP6549T-E/ST MCP6549T-E/ST 37645 Microchip Technology IC COMPARATOR 4 GEN PUR 14TSSOP 14-TSSOP (0.173", 4.40mm Width)
LM139ADT LM139ADT 8831 STMicroelectronics IC COMPARATOR 4 GEN PUR 14SO 14-SOIC (0.154", 3.90mm Width)
LPV7215MG/NOPB LPV7215MG/NOPB 35281 Texas Instruments IC COMPARATOR 1 GEN PUR SC70-5 5-TSSOP, SC-70-5, SOT-353
LMC7211BIM5 LMC7211BIM5 12527 Texas Instruments IC COMPARATOR 1 GEN PUR SOT23-5 SC-74A, SOT-753
LMC7221AIM5 LMC7221AIM5 16978 Texas Instruments IC COMPARATOR 1 GEN PUR SOT23-5 SC-74A, SOT-753
TS391RIYLT TS391RIYLT 4320 STMicroelectronics IC COMPARATOR 1 GEN PUR SOT23-5 SC-74A, SOT-753
LMV7235M7/NOPB LMV7235M7/NOPB 39158 Texas Instruments IC COMPARATOR 1 GEN PUR SC70-5 5-TSSOP, SC-70-5, SOT-353
TS3022IDT TS3022IDT 7212 STMicroelectronics IC COMPARATOR 2 GEN PUR 8SOIC 8-SOIC (0.154", 3.90mm Width)
TSX3702IQ2T TSX3702IQ2T 19197 STMicroelectronics IC COMPARATOR 2 GEN PUR 8DFN 8-UFDFN Exposed Pad
LM139DT LM139DT 42028 STMicroelectronics IC COMPARATOR 4 GEN PUR 14SO 14-SOIC (0.154", 3.90mm Width)
TLV7211AIDBVR TLV7211AIDBVR 639 Texas Instruments IC COMPARATOR 1 GEN PUR SOT23-5 SC-74A, SOT-753
MAX9027EBT+T MAX9027EBT+T 13619 Analog Devices Inc./Maxim Integrated IC COMPARATOR 1 GEN PUR 6WLP 6-WFBGA, WLBGA
LM239D LM239D 30605 STMicroelectronics IC COMPARATOR 4 GEN PUR 14SO 14-SOIC (0.154", 3.90mm Width)
ADCMP380-1ACBZ-RL7 ADCMP380-1ACBZ-RL7 50384 Analog Devices Inc. IC COMPARATR 1 W/VOLT REF 6WLCSP 6-WFBGA, WLCSP
MCP6542-I/SN MCP6542-I/SN 48999 Microchip Technology IC COMPARATOR 2 GEN PUR 8SOIC 8-SOIC (0.154", 3.90mm Width)
LM393M LM393M 20701 Texas Instruments IC COMPARATOR 2 GEN PUR 8SOIC 8-SOIC (0.154", 3.90mm Width)
TS3702CDT TS3702CDT 8729 STMicroelectronics IC COMPARATOR 2 GEN PUR 8SOIC 8-SOIC (0.154", 3.90mm Width)
MAX9646EUK+T MAX9646EUK+T 54706 Analog Devices Inc./Maxim Integrated IC COMPARATOR 1 GEN PUR SOT23-5 SC-74A, SOT-753
LMV7271MGX/NOPB LMV7271MGX/NOPB 28130 Texas Instruments IC COMPARATOR 1 GEN PUR SC70-5 5-TSSOP, SC-70-5, SOT-353

Comparators

1. What are Linear Comparators?

‌Basic Definition‌: A linear comparator is an electronic circuit that compares the magnitude relationship of two analog input signals and outputs a high/low level digital signal as the comparison result. When the input signal exceeds the preset threshold, the output is high level, otherwise the output is low level.

‌The Meaning of “Linear”: refers to the response stage before the input signal reaches the threshold, there is a linear relationship between the output and the input; but the overall function is still to trigger the state jump through the threshold, rather than continuously amplifying the signal.

 

2. What are the Key Characteristics of Linear Comparators?

‌Response Characteristics‌: The linear response to the input signal is limited to a specific range near the threshold, and it is essentially still a discontinuous switching device.

‌Difference from Hysteresis Comparator‌: Hysteresis comparators (such as Schmitt triggers) form a hysteresis loop through positive feedback to resist interference, while linear comparators do not have this feature, and the output may be falsely triggered due to noise.

‌Basis for Component Classification‌: Although it is called “linear”, its working mode involves state mutations and belongs to the category of nonlinear components; the “linear” in the name only describes the local characteristics before the threshold.

 

3. What are Linear Comparators Used for?

‌Signal Interface Conversion‌: used for threshold detection of analog signals in analog-to-digital converters (ADCs) to achieve the transition from analog to digital signals.

‌Protection and Monitoring Circuit‌: used for voltage monitoring, overvoltage/undervoltage protection systems, and real-time detection of power supply or signal anomalies.

‌Sensor Signal Processing‌: cooperate with sensors (such as photosensors and pressure sensors) to compare signals and trigger subsequent control logic.

 

4. Actual Product Examples for Linear Comparators

Some domestic analog chip manufacturers (such as Linearin) have launched high-performance comparator product lines, covering low power consumption, high precision, and other types, which are used in industrial control, the Internet of Things, and automotive electronics.

 

5. ‌Summary‌

Linear comparators are key threshold judgment devices in analog circuits. Their “linear” characteristics are reflected in the local linear response of the input before the threshold. They are suitable for scenarios that require precise level detection, but attention should be paid to anti-interference design to avoid false triggering.