CJMCU-6164 Noise Threshold Comparator Sound Sensor Detection Voltage Environment Monitoring

CJMCU-6164 Noise Threshold Comparator Sound Sensor Detection Voltage Environment Monitoring

General Description:
- The MAX6100–MAX6107 are low-cost, low-dropout (LDO), micropower voltage references. These three-ter-minal references are available with output voltage options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V, 4.5V, and 5V. They feature a proprietary curvature-correction circuit and laser-trimmed, thin-film resistors that result in a low temperature coefficient of 75ppm/°C (max) and an initial accuracy of ±0.4% (max). These devices are specified over the extended temperature range (-40°C to +85°C).
- These series-mode voltage references draw only 90µA of supply current and can source 5mA and sink 2mA of load current. Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external resistor, these devices offer a supply current that is virtually independent of the supply voltage (with only a 4µA/V variation with supply voltage) and do not require an external resistor. Additionally, these internally compen-sated devices do not require an external compensation capacitor and are stable with load capacitance. Eliminating the external compensation capacitor saves valuable board area in space-critical applications. Low-dropout voltage and supply independent, ultra-low sup-ply current make these devices ideal for battery-operat-ed, high-performance, low-voltage systems.
- The MAX6100–MAX6107 are available in tiny 3-pin SOT23 packages.

Applications:
- Portable Battery-Powered Systems
- Notebook Computers
- PDAs, GPSs, DMMs
- Cellular Phones
- Hard-Disk Drives

Features:
- Ultra-Small 3-Pin SOT23 Package
- Low Cost
- No Output Capacitor Required
- Stable with Capacitive Loads
- Load Regulation (2mA Sink): 8mV/mA (max)
- Load Regulation (5mA Source): 0.9mV/mA (max)
- ±0.4% (max) Initial Accuracy
- Low 75ppm/°C Temperature Coefficient
- 125µA (max) Quiescent Supply Current
- 50mV Dropout at 1mA Load Current

Part:MAX6104EUR-T    
Temp range:-40°C to +85°C    
Pin package:3 SOT23-3    
Top mark:FZGW

Note: There is a minimum order increment of 2500 pieces for SOT23 packages.

Part:MAX6104    
Output voltage:4.096V        
Input voltage range:(VOUT + 200mV) to 12.6V

Module working principle:
- When the volume of ambient sound reaches the set threshold, an interrupt is triggered.
The most important parts of the circuit are the microphone, an RMS-to-DC converter, two dual rail-to-rail Input/Output 10 MHz operational amplifiers, and a 12-bit digital-to-analog converter (DAC).
- The 12-bit DAC provides the reference voltage — the noise threshold — for the comparator. You set the exact level through the SPI interface. The threshold should be configured through trial and error (4096 discrete values to select from).
Beside SPI, EN and OUT pins provide additional functionality.
- The board works on a 3.3V power supply.

Package List:
- 1 x CJMCU-6164 Noise Threshold Comparator