Datasheet

Functional Description
MC13783 Technical Data, Rev. 3.5
Freescale Semiconductor 35
The MC13783 provides a headset detection scheme based on the sleeve detection, left channel impedance
detection and microphone bias detection which is valid for headsets with or without phantom ground
connection. It is compatible with mono headsets where the left channel is connected to ground.
4.3.5.7 Line Output Amplifier Arxout
The Arxout amplifier combination is a low power stereo amplifier. It can provide the stereo signal to for
instance an accessory connector. The same output of the selector block is used for the internal connection
to the USB transceiver for CEA-936-A Carkit support.
THD (2
nd
and 3
rd
) 1.0 kHz V
OUT
= 1 V
PP
—0.030.1 %
V
OUT
= 10 mV
RMS
—0.030.1 %
PSRR with respect to BP
20 Hz - 20 kHz
inputs AC grounded
A Weighted
90 — — dB
Input Noise A weighted — — 20 μV
RMS
Load Impedance Resistance 12.8 16 38 Ω
Table 21. Arx Performance Specifications
Parameter Condition Min Typ Max Units
Gain 1.0 kHz Vin = 100 mVpp -0.2 0 +0.2 dB
Single Ended Output Swing Includes reverse bias
protection purpose
—1.82—Vpp
PSRR with respect to BP
20 Hz – 20 kHz
inputs AC grounded
A Weighted
—90——dB
THD (2
nd
and 3
rd
) gain = 0 dB V
OUT
= 1 V
PP
——0.1%
V
OUT
= 100 mV
RMS
——0.1%
V
OUT
= 10 mV
RMS
(3) — — 0.1 %
External Load Impedance — — 1 — — kΩ
Output Noise gain = 0 dB
A weighted
20 Hz - 20 kHz
Per output (2)
— — 15 20 µV
RMS
Table 20. Amplifiers Ahsr and Ahsl Performance Specifications (continued)
Parameter Condition Min Typ Max Units