The MX93000 is a single-chip solution for telephone applications requiring a single +5V power supply. It integrates key functions of the analog-front-end of Digital Answering Machine (DAM) into a single integrated circuit. It has automatic level control, differential line driver, digital volume control, programmable transmit/receive gain control, etc. It is suitable for DAM applications.
The MX93000 Special Codec is a single‑chip solution for digital answering machine (DAM) systems, requiring only a +5 V supply. It combines sigma‑delta A/D and D/A converters, on‑chip automatic level control, programmable gain amplifier, and a fully differential line driver, allowing direct connection to telephone lines without external amplifiers.
The device offers extensive configurability through programmable registers, supporting multiple signal paths, volume control, and power‑down detection. Detailed specifications cover analog input/output ranges, gain steps, dynamic range, noise performance, and power consumption.
| Programmable Gain Amplifier Range | 0 – 22.5 dB |
|---|---|
| PGA Step Size | 1.5 dB |
| Dynamic Range (A/D Path) | 72 dB |
| Power Supply Voltage | 4.5 – 5.5 V |
| VREF Output | 2.0 – 2.5 V |
The MX93000 operates from a single +5 V supply, with a permitted range of 4.5 V to 5.5 V.
The PGA offers 16 gain steps, each about 1.5 dB, covering a total range of 0 – 22.5 dB.
Yes, it includes active‑low POWER_LOW and BATTERY_LOW detectors using two comparators.
The A/D path provides a dynamic range of 72 dB.