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AT73C240
6. Audio Power Amplifier
6.1
Electrical Specifications
VBAT = 3.6V, T A = 25°C unless otherwise noted. 100 nF capacitor connected between CBP and GNDA, 470nF input
capacitors, load = 8 Ohms.
Table 6-1.
Audio Power Amplifier Electrical Specifications (General Conditions: V DD = 3.6V,T A = 25°C)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V DD
I DD
Supply voltage
Quiescent current
Inputs shorted, no load
3
3.6
6
5.5
12
V
mA
I DDstby
V Cbp
Standby current
DC reference
VDD/2
2
μA
V
VOS
Output differential offset
Full gain, capacitive input coupling
-20
0
20
mV
Active state, maximum gain
10K
15k
20k
Z IN
Z LFP
Input impedance
Output load
Active state, minimum gain
100K
6
150k
8
200k
32
Ohms
Ohms
C L
PSRR
Capacitive load
Power supply rejection ratio
Between each output and the ground
200 to 2 kHz differential output
60
100
pF
dB
1 kHz reference frequency
F CL
Low Frequency Cutoff
3 dB attenuation
25
40
Hz
Maximum gain
1 KHz reference frequency
F CH
High Frequency Cutoff
3 dB attenuation
20
kHz
Maximum gain
Off to on mode
t UP
Output setup time
Voltage already settled
10
ms
Input capacitors precharged
V N
Output noise
Max gain, A weighted
120
500
μV RMS
1 kHz
THD
Output distortion
Pout = 3mW to 300mW
50
dB
gain = 2dB
P max
Maximum power
1 KHz
load 8 ohms
440
mW
G ACC
G STEP
Overall Gain accuracy
Gain Step Accuracy
-2
-0.7
0
0
2
0.7
dB
dB
5
6464A–PMAAC–28-Apr-09
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