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Amplifier 4 MOST
User Manual
3 Electrical Characteristics
3.1 Operating Conditions
The Amplifier 4 MOST supports the following operating modes:
"Full on":
Amplifiers provide full amplification
"Idle":
Digital circuits operate with amplifiers muted
"Sleep":
Fiber optic receiver unit active and waiting for light input
The power supply operates normally while the input voltage is between 10 and 16 Volt DC. The
Amplifier 4 MOST will mute on the following fault conditions:
1. Under voltage – input voltage drops below 10 Volt DC
2. Loss of Light
Operating conditions:
Symbol
Description
V
Operating Supply Voltage
bat
V
Idle Supply Voltage
idle
I
Idle Supply Current
q
I
Sleep Supply Current
sleep
I
Peak Supply Current
pk
3.2 Amplifier Channel Characteristics
Symbol
Description
P
Output Power
out
THD
PSRR
Power Supply Rejection
DR
Dynamic Range
V
(0)
Output Noise
n
f
Low frequency cutoff
lo
f
High Frequency cutoff
hi
Frequency response
V
Full Scale Output Voltage
ffs
The amplifiers are short-circuit protected. All tests performed using a 1FFS digital source on the
MOST Network, V
= 14.4 Volt DC, sound settings flat, output signal measured at the output
bat
terminals of the Amplifier 4 MOST.
User Manual
Page 10
– optical input shut off or removed
Conditions
Full ON operation
Idle operation
Muted
Light off for 1 Min
Table 3-1: Operating characteristics
Conditions
R
R
Volume = 0x40
Volume=Max vs
Volume=min+1
Volume=0x00
From f
Table 3-2: Amplifier channel characteristics
© Copyright 2002 - 2003 OASIS SiliconSystems
Amplifier 4 MOST Version: 2.0 User Manual
Document Version: 2.0-03
=4 Ω, THD=10 %
L
=2 Ω, THD=10 %
L
to f
lo
hi
Release Date: 2003-07-23
Min
Typ
Max
10
14.4
18
5
10
1
160
40
Min
Typ
Max
25
40
-85
-60
110
200
50
20
-3
0.5
8.5
Units
V
V
A
µA
A
Units
W
W
dB
dB
dB
µV
rms
Hz
kHz
dB
V
rms
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