User Guide

NHB–3
Technical Documentation
PAMS
HF Desktop Charger CHH–8P
Original 26/97 Page 12
+VREF Ref. voltage for analog parts
• voltage min/typ/max:
2.4...2.4...3.1 V
• current max: 5 mA
Supply Voltages and Power Consumption on the DC4 Module
Symbol: Description: Values:
+5V Supply for 5 V logic parts
• voltage min/typ/max:
4.75...5.0...5.25 V
• current max: 15 mA
AC Characteristic (1 kHz)
Symbol: Description: Values:
XMIC External microphone signal
• Cable level:
200 mV
RMS
• 0 dBmO: 415 mV
RMS
HFMIC Handsfree microhone signal
• MRP, mic ref point.: +15.3 dBPa 50 cm
• HFMIC, about 20 dB atten.: –4.7 dBPa
• Gain for HFMIC: 40 dB
• Cable level: 200 mV
RMS
XEAR External earphone signal
• Cable level:
130 mV
RMS
• 0 dBmO: 411 mV
RMS
HFSP Handsfree speaker signal
• Cable level: 130 mV
RMS
• Gain for HFSP: 17 dB