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AT73C213
6. Audio Power Amplifier
6.1
Electrical Specifications
VBAT = 3.6V, T A = 25°C unless otherwise noted. High power mode, 100 nF capacitor connected between CBP and GND
Audio, load = 8 Ohms.
Table 6-1.
Audio Power Amplifier Electrical Specifications (General Conditions: V DD = 3.6V,T A = 25°C)
Symbol
V DD
I DD
Parameter
Supply voltage
Quiescent current
Conditions
Unloaded, 100 nF decoupling capacitor
to GND
Inputs shorted, no load
Min
3
Typ
3.6
6
Max
5.5
8
Unit
V
mA
I DDstby
V Cbp
Standby current
DC reference
VDD/2
2
μA
V
VOS
Z IN
Z LFP
Z LLP
Output differential offset
Input impedance
Output load
Output load
Full gain
Active state
Full Power mode
Low-Power mode, including R1
-20
12K
6
100
0
20k
8
150
20
30k
32
300
mV
Ohm
Ohm
Ohm
C L
Capacitive load
100
pF
PSRR
Power supply rejection ratio
200 to 2 kHz differential output
60
dB
1 kHz reference frequency
BW min
Low Frequency Cutoff
3 dB attenuation
50
Hz
470 nF input coupling capacitors
BW max
High Frequency Cutoff
1 KHz reference frequency
3 dB attenuation
20
kHz
Off to on mode
t UP
Output setup time
Voltage already settled
10
ms
Input capacitors precharged
V N
THD HP
Output noise
Output distortion
Max gain, A weighted
High power mode, 1 kHz,
Pout = 100mW, gain = 0dB
120
0.3
500
μV RMS
%
Low power mode,1KHz, V
THD LP
Output distortion
out = 100m Vpp, Max gain, load 8 ohms
1
%
in series with 200 ohms
High power mode, 1 KHz,
P max
Maximum power
Vout = 100 mVpp, Max gain, load 8
440
mW
ohms in series with 200 ohms
G ACC
G STEP
Overall Gain accuracy
Gain Step Accuracy
-2
-0.7
0
0
2
0.7
dB
dB
5
2744B–PMAAC–11-Apr-08
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