System controller and digital volume control for modular pre-amplifier.
Assembled and tested module with manual.
This module is designed to control our modular pre-amplifier and holds the system firmware.
It works in conjunction with the CONTROLLER-02 4 x 20 lines text LCD with rotary encoder module.
The SYSCON01A contains the digital volume control circuit, based on the Burr-Brown PGA2310UA high-end volume control chip, I2C serial interface, infrared communication, 12V trigger interface and connections for power button and LED.
Specifications
Audio:
Gain and Attenuation Range 31.5 dB to −95.5 dB With 0.5 dB or 1 dB steps
Balance control ±9.5 dB
Low Noise and Distortion 120-dB Dynamic Range with 0.0004% THD+N at 1 kHz
Interchannel Crosstalk −126 dBFS
Noise-Free Level Transitions
Muting circuit
Extremely stable integrated ±11V power supply for the chip
System control:
Based on a Microchip ATMega328 microcontroller running at 8MHz.
Infra red interface with programmable control codes to use any RC5 remote control.
12V trigger output to control power amplifiers.
Software:
Full control of all pre-amplifier functions
Auto detection of plugin boards with user description for each board
Function control by IR remote and rotary encoder
Programmable codes for IR remote control
Board size 50 x 100mm
DIN 41617 connector (gold plated)
Supply voltage ±13V to ±14V and 12V DC
12V trigger out 100mA max.
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