Handset Microphone Input (Pins 39, 40); Handset Speaker Output (Pins 37, 38) - Enfora Enabler LPP G Integration Manual

6.6.5. Handset Microphone Input (Pins 39, 40)

The handset differential inputs MICIP and MICIN can be amplified by the differential handset
microphone amplifier. This amplifier has a gain of 25.6 dB.
Handset Mic Input
Maximum Input Range –
Mic(+) to Mic(-)
Nominal Ref. Level –
Mic(+) to Mic(-)
Differential Input
Resistance –
Mic(+) to Mic(-)
Microphone Pre-
Amplifier Gain

6.6.6. Handset Speaker Output (Pins 37, 38)

Pin Name
EARP
EARN
The earphone amplifier provides a full differential signal on the terminals EARP and EARN (Earphone).
Handset Spkr Output
Maximum Differential
Resistive Load
Maximum Differential
Capacitive Load
Common Mode
Minimum Resistive Load
Common Mode
Maximum Capacitive
Load
Amplifier Gain
LPP0108IG001
Parameter/Conditions
Inputs 3 dBm0 (Max. digital
sample amplitude when PGA
gain set to 0 dB)
Differential MIC
Differential MIC, MICAMP gain
= 25.6 dB
(INMODE = 0001)
Differential MIC
Pin Number Signal Direction
37
38
Parameter/Conditions
Output Swing 3.9 V
PP
Output Swing 1.5 V
PP
At Internal Speaker (+) or (-)
At Internal Speaker (+) or (-)
EARG = 1
EARG = 0
34
Min
O Earphone positive output
O Earphone negative output
Min
Version - Preliminary – 06/20/08
Typ Max Units
32.5 mV
-10 dBm0
36
k
25.6 dB
Description
Typ Max Units
120 
33 
100 pF
200
k
50 pF
1 DB
-11 dB
RMS