MAX9925

• Demonstrates the Operation of MAX9926U Modes A1, A2, and B
• Evaluates Dual Differential and Single-Ended Variable-Reluctance (VR or Magnetic Pickup) Sensors
• Demonstrates Zero Crossing, Peak Detection, Adaptive Threshold Mechanism, and Rotation Direction
• Includes Lowpass Sensor Input Filters
• Evaluates 5Hz to 25kHz VR Sensors
• Fully Assembled and Tested

The MAX9926U evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a dual-channel differential variable-reluctance (VR or magnetic pickup) sensor interface circuit using a MAX9926U IC in a 16-pin QSOP package. The dual-channel interface circuit also features differential amplifiers for evaluating a pair of differential or single-ended VR sensor signals and provides a gain of 1. Input power to the EV kit circuit can be supplied by a 4.5V to 5.5V DC source. The MAX9926U IC temperature range is -40°C to +125°C. The EV kit uses automotive power-train safety-equipment-rated ceramic capacitors with a temperature range of -55°C to +125°C.

The MAX9926U EV kit circuit can be configured to demonstrate the MAX9926U IC's operation with internal adaptive peak threshold and zero-crossing detection modes, as well as to interface to a microcontroller pulse-width modulation (PWM) signal for evaluating external thresholds. It can interface to both differential as well as single-ended VR sensors. The EV kit can evaluate external VR signals from 5Hz to 25kHz.

Applications

• Camshaft VRS Interfaces
• Crankshaft VRS Interfaces
• Vehicle Speed VRS Interfaces

• Demonstrates MAX9924U MODE A1, A2, B, and C Operation
• Evaluates Differential and Single-Ended Sensors (VR or Magnetic Pickup)
• Demonstrates Zero-Crossing and Adaptive Threshold Mechanism
• Includes Lowpass Sensor Input Filter
• On-Board 5Hz/24kHz Triangle-Wave Generator
• Evaluates MAX9925 (IC Replacement Required)
• Lead(Pb)-Free and RoHS Compliant
• Fully Assembled and Tested

The MAX9924U evaluation kit (EV kit) is a fully assembled and tested PCB that contains a differential variable reluctance (VR) sensor interface circuit using a MAX9924U IC in a 10-pin µMAX® package. The single-channel interface circuit also features a differential amplifier for evaluating differential or single-ended VR sensor (magnetic pickup sensor) signal, and provides a fixed gain of 1V/V. Input power to the EV kit circuit can be supplied by a 4.5V to 5.5V DC source. The MAX9924U IC temperature range is -40°C to +125°C.

The MAX9924U EV kit circuit can be configured to demonstrate the MAX9924U IC's operation with internal adaptive peak threshold and zero-crossing detection modes. It can also interface to a microcontroller PWM signal for evaluating external thresholds. Additionally, a configurable on-board triangle-wave generator using a MAX9000 IC provides a 5Hz, 55Hz, 2.5kHz, or 24kHz triangle-wave signal if no external VR signal is available for evaluation.

Applications

• Camshaft VRS Interfaces
• Crankshaft VRS Interfaces
• Vehicle Speed VRS Interfaces