Nokia 6310I - Cell Phone - GSM, Service Manual

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PAMS Technical Documentation 3 - Audio System
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UEM HF output specifications
Parameter Test condition Min Typ Max Unit
Output voltage swing
single ended mode with 60 dB signal to total distortion
ratio 1.0 V
PP
Output voltage swing fully
differential mode with 60 dB signal to total distortion
ratio 2.0 V
PP
Output resistance (0 Hz
to 4 kHz) PDM Data with 50 % pulse ratio in
the DAC input 1 Ohm
Parasitic load resistance HF to HFCM (with external audio
circuitry) 10 nF
Load resistance HF to HFCM or VSA (with
headset) 30 45 Ohm
UEM UPP
68k
68k
15
C?? (R161)
10n
GND
10n
10n
Figure 16. External Earpiece Interface
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