Nokia 6310i - Page 89

PAMS Technical Documentation 3 - Audio System
NPL-1
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7DEOHMicrophone input specifications
Parameter Symbol Min Typ Max Unit
Microphone amplifier input resistor R
M30
30 50 kOhm
Differential input voltage range for MIC1
input, G =20 dB
V
IN1
200 1200 m V
PP
Receive Common mode input voltage
range for MIC input
V
HFCM
100 m V
PP
Common mode voltage level V
CM
1.3 1.35 1.4 V
Differential mode voltage range for
microphone amplifier, at gain = 20dB
V
OUT
2.0 V
PP
Differential load resistance for the
microphone input stage
R
OS
30 450 kOhm
Transmit gain absolute accuracy GXA -1.0 0.0 dB
Transmit gain variation with programmed
gain, temperature and supply
GXAGT
V
-0.7 0.7 dB
Common mode rejection ratio CMRR 45 60 dB