參數(shù)資料
型號: MCF53012CQT240
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: MICROPROCESSOR, PQFP208
封裝: 28 X 28 MM, ROHS COMPLIANT, LQFP-208
文件頁數(shù): 52/62頁
文件大小: 2365K
代理商: MCF53012CQT240
MCF5301x Data Sheet, Rev. 5
Preliminary—Subject to Change Without Notice
Preliminary Electrical Characteristics
Freescale Semiconductor
56
5.20.2
Handset Amplifier
The handset amplifier boosts the power from the DAC and drives the handset. It also provides analog volume control to
optimize the noise performance of the entire channel. Table 36 shows the specifications for handset amplifier.
Signal to Noise Ratio (SNR)
Gain = 0dB, VOUT = 1.4VRMS,
BW = 20Hz – 20kHz
—99—
dB
Power Supply Rejection Ratio
(PSRR)
Gain = 0dB,
Vripple = 200mVpp
f = 217Hz
60
dB
f = 1kHz
60
f = 4kHz
60
Max. Cap Load Drive
No Sustained Oscillations
300
pF
Output SC Current
625
mA
Gain Error
Gain = –45,–21, –6, 0, 4, 6 dB
±0.5
dB
Table 36. Handset Amplifier Specifications
Parameter
Conditions
Min
Typ
Max
Units
Quiescent Current
800
μA
Shutdown Current
TBD
Input Reference Offset
2
5
mV
Max. Output Power
Fin = 1kHz, THD + N = 1%, RL = 8Ω
—300
mW
Total Harmonic Distortion (THD)
Gain = 0dB,
RL =8Ω, Fin = 1kHz
Full Power, 250mW
0.050
%
Half Power, 125mW
0.050
Gain = 0dB,
RL =8Ω, Fin = 4kHz
Full Power, 250mW
0.1
Half Power, 125mW
0.050
Integrated Output Noise
Gain = 0dB, BW = 20Hz – 20kHz
15
μV
Signal to Noise Ratio (SNR)
Gain = 0dB, VOUT = 1.4VRMS ,
BW = 20Hz – 20kHz
—99—
dB
Power Supply Rejection Ratio
(PSRR)
Gain = 0dB,
Vripple = 200mVpp
f = 217Hz
60
dB
f = 1kHz
60
f = 4kHz
60
Maximum Cap Load Drive
No Sustained Oscillations
300
pF
Output SC Current
325
mA
Gain Error
Gain = –45, –21, –6, 0, 4, 6 dB
±0.5
dB
Table 35. Speaker Amplifier Specifications (continued)
Parameter
Conditions
Min
Typ
Max
Units
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