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CXA042301 Dual-Voltage Comparators: Industrial-Grade Solutions for High-Precision Signal Decision

In the fields of battery management, motor control and sensor threshold detection, voltage comparator is the core component of signal decision-making.CXA042301As a two-channel precision voltage comparator,Wide to 2V-36V operating voltage,Quiescent current as low as 0.8mAandZero level input capabilityIdeal for industrial and consumer electronics. This paper will analyze its technical characteristics, anti-oscillation design points and typical application circuits in depth.YwJ嘉泰姆

1. revolutionary performance breakthrough

CXA042301 uses a unique architecture to achieve three core benefits:YwJ嘉泰姆

1.1) Limit voltage adaptabilityYwJ嘉泰姆

1.1.1) Single Power Mode:2.0V~36V(Suitable for battery-powered equipment)YwJ嘉泰姆

1.1.2) Dual power mode:±1.0V~±18VPrecision Industrial SystemsYwJ嘉泰姆

1.2) Nanoscale Input ErrorYwJ嘉泰姆

1.2.1)Input Offset Voltage:±1.0mV(Full temperature zone)YwJ嘉泰姆

1.2.2)Input bias current:25nA(typical)YwJ嘉泰姆

1.3) Zero level detection capability: The input common-mode voltage range includes ground level, and weak signals can be directly detected under single power supplyYwJ嘉泰姆

Industry Value: Directly compatible with TTL/CMOS logic levels, eliminating the level conversion circuit required by traditional comparators.YwJ嘉泰姆

2. Key Pins and Anti-Oscillation Design

2.1) Pin Definition (Symmetrical Dual Channel Structure)

2.2) Engineering Practice to Eliminate Oscillation(Core knowledge on page 5 of the manual)

2.2.1) Parasitic capacitance countermeasuresYwJ嘉泰姆

2.2.1.1)Input resistance ≤ 10kΩ (reduce feedback signal strength)YwJ嘉泰姆

2.2.1.2)PCB layout: Shorten input-output trace distanceYwJ嘉泰姆

2.2.2) Hysteretic Technology Mandatory SchemeYwJ嘉泰姆

2.2.2.1)Add 1-10mV positive feedback (Figure 5-1 Basic Circuit Improvement)YwJ嘉泰姆

2.2.2.2)Pulse signal (rise/fall time <300ns) can be exempted from hysteresisYwJ嘉泰姆

2.2.3) Unused Pin HandlingAll idle inputs must be grounded to avoid floating noiseYwJ嘉泰姆

3. six classic application circuit details

3.1. Zero-crossing detector (single power supply)(Figure 5-6)

3.1.1) Direct monitoring of AC signal phase reversalYwJ嘉泰姆

3.1.2) Configuration points: the same phase terminal is grounded, and the opposite phase terminal is connected to the AC signalYwJ嘉泰姆

3.2. CMOS/TTL driver circuit(Figure 5-2/5-3)

3.2.1) Direct drive of logic gates with open collector outputsYwJ嘉泰姆
3.2.2) Calculation of pull-up resistance:R_up = (Vcc - Voh) / Ioh（Voh≥4.5V@TTL）YwJ嘉泰姆

3.3. low frequency operational amplifier(Figure 5-4)

3.3.1) Open loop gain 200V/mV, support precision amplificationYwJ嘉泰姆

3.3.2) Bandwidth limitation: applicable to DC ~ 10kHz signalsYwJ嘉泰姆

3.4. voltage controlled oscillator(Figure 5-7)

3.4.1)Two-order structure for linear frequency modulationYwJ嘉泰姆

3.4.2) Key parameters: the center frequency is set by the RC networkYwJ嘉泰姆

4. Limit Parameters and Electrical Characteristics

4.1. Absolute maximum rating (Ta = 25 ℃)

4.2. Key performance indicators (Vcc = 5V)

5. packaging and production guidance

5.1) Package selection suggestion

5.2) Weld Warning: Reflow soldering peak temperature ≤ 260 ℃(10s) to avoid thermal damageYwJ嘉泰姆

6. Industry Application Scenarios

6.1) Battery management systemCharge and discharge threshold control (using zero level detection)YwJ嘉泰姆

6.2) Industrial safety equipment: Overvoltage/undervoltage protection (response time <300ns)YwJ嘉泰姆

6.3) Automotive electronicsSensor fault diagnosis (-40 ℃ ~ 105 ℃ full temperature range)YwJ嘉泰姆

Design Trap Avoidance Guide

1. The output terminal must be connected with a pull-up resistor: The output is in a high resistance state when there is no load, resulting in a subsequent logic error.YwJ嘉泰姆

2. Negative pressure input protection: Input voltage ≥-0.3V, otherwise the parasitic diode is triggered to conductYwJ嘉泰姆

3. High temperature environment deratingWhen Ta>85 ℃, the power consumption needs to be reduced to <300mW(SOP package)YwJ嘉泰姆

Advanced Skills: The offset adjustment circuit (Figure 5-5) can be used to increase the accuracy to ± 0.1mV, which is suitable for precision instruments such as electronic scales.YwJ嘉泰姆

CXA042301 throughTwo-channel independent comparison,nanosecond responseandIndustrial Temperature AdaptabilityTo provide engineers with a reliable signal decision scheme. A correct understanding of its open collector characteristics and anti-oscillation design principles can greatly improve system stability.YwJ嘉泰姆

If you need detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!YwJ嘉泰姆
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   Product packaging diagramYwJ嘉泰姆

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   Circuit schematicYwJ嘉泰姆

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  Related Chip Selection GuideMore similar products......YwJ嘉泰姆

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