MC13109FB View Datasheet(PDF) - Motorola => Freescale
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MC13109FB Datasheet PDF : 28 Pages
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MC13109
ELECTRICAL CHARACTERISTICS (continued)
Compressor/ALC/Tx Mute/Limiter (See Figure 5)
The compressor analog gound is set to the half supply
reference so the input and output swing capability will
increase as the supply voltage increases. The “C In” input is
ac coupled. The ALC (Automatic Level Control) provides a
soft limit to the output signal swing as the input voltage
increases slowly (i.e., a sine wave is maintained). The Limiter
circuit limits rapidly changing signal levels by clipping the
signal peaks. The ALC and/or Limiter can be disabled
through the MPU serial interface.
(Test Conditions: VCC = 2.6 V, fin = 1.0 kHz, TA = 25°C.)
Characteristic
Condition
Input Measure
Pin
Pin
Symbol
Min
Compressor 0 dB Gain Vin = –10 dBV, ALC
C In Lim Out
G
–3.0
Level
disabled, Limiter
disabled
Compressor Gain
Vin = –30 dBV, Output
C In Lim Out
Gt
–11
Tracking
Relative to G
Vin = –50 dBV, Output
–23
Relative to G
Maximum Compressor Vin –70 dBV
Gain
C In
Lim Out AVmax
–
Total Harmonic
Distortion
Vin –10 dBV, ALC
C In
Lim Out
THD
–
disabled, Limiter
disabled
Input Impedance
–
C In Lim Out
Zin
–
Attack Time
Ccap = 1.0 µF,
C In Lim Out
ta
–
Rfilt = 20 kΩ
(see Appendix B)
Release Time
Ccap = 1.0 µF,
C In Lim Out
tr
–
Rfilt = 20 kΩ
(see Appendix B)
Expander to
V (C In) = 0 Vrms,
Rx Audio Lim Out
CT
–
Compressor Crosstalk Vin = –10 dBV
In
Tx Data Mute
Vin = –10 dBV, ALC
C In Lim Out
Me
–
disabled
No popping
detectable during Rx
Mute transitions
ALC Dynamic Range
–
C In Lim Out
DR
–24
ALC Output Level
Limiter Output Level
Vin = –18 dBV
Vin = –2.5 dBV
ALC disabled
C In
Lim Out ALCout
–
–
C In
Tx Out
Vlim
–
Typ
–0.17
–10.23
–20.23
30
0.5
16
3.0
13.5
–
–70
–
–16
–12
0.8
Max
Unit
3.0
dB
–9.0
dB
–17
–
dB
–
%
–
kΩ
–
ms
–
ms
–40
dB
–
dB
–2.5
dBV
–
dBV
–
–
Vpp
MOTOROLA ANALOG IC DEVICE DATA
9
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