
LA6537M
No.5231-2/6
Electrical Characteristics at Ta = 25
°C, VCC = 7.5V
Parameter
Symbol
Conditions
min
typ
max
Unit
ICC1
Note 1
20
40
60
mA
No-load current drain
ICC2
Note 2
26
60
mA
VOF1
Note 3, amplifiers 1 – 2, 7 – 8
50
+50
mV
Output offset voltage
VOF2
Note 3, amplifiers 3 – 4, 5 – 6
50
+50
mV
Input bias current
IB
100
500
nA
Buffer input voltage range
VBIN
1.5
VCC–1.5
V
Input voltage range
VIN
1.0
VCC–1.5
V
Output source voltage
VO1
Note 4, RL = 8.0
5.0
5.6
V
Output sink voltage
VO2
Note 5, RL = 8.0
1.8
2.4
V
Closed-circuit voltage gain
VG
Bridge amplifier
12
dB
Slew rate
SR
0.15
V/
s
Mute on voltage
VM
Note 6
2
V
Mute pin inflow current
IM
Note 6
60
A
Note : 1. Mute off and buffer in assume 1/2 VCC V.
2. Mute off and buffer in assume 0.5V.
3. Represents the interoutput difference.
4. Voltage relative to ground (source) when an 8
load is connected between bridge amplifier outputs.
5. Voltage relative to ground (sink) when an 8
load is connected between bridge amplifier outputs.
6. Muting is activated when high, and the amplifier outputs 3 and 4 are off.
Test Method
SW No.
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ICC1
a
ON
OFF
b
OFF
ON
OFF
b
OFF
ICC2
a
ON
OFF
b
OFF
ON
OFF
a
OFF
VOF1,2
b
ON
OFF
b
OFF
ON
OFF
b
OFF
IB
b
OFF
ON
OFF
a
ON
OFF
b
OFF
VO1
b
OFF
ON
OFF
ON
b
a
OFF
ON
b
OFF
VO2
b
OFF
a
b
OFF
ON
b
OFF
VM
b
ON
OFF
b
OFF
ON
OFF
b
OFF
IM
b
ON
OFF
b
OFF
ON
OFF
b
OFF
VG
b
ON
OFF
b
OFF
ON
OFF
b
ON
1. For ICC1 and 2, measure the inflow current on the VCC pin.
2. For VOF1 and 2, measure the voltage between pins 3 and 4 (amplifiers 1 and 2), pins 27 and 28 (amplifiers 7 and 8),
pins 12 and 13 (amplifiers 3 and 4), and pins 18 and 19 (amplifiers 5 and 6).
3. For IB, measure the voltage across the 100k resistor (IB = V/100k).
4. For VO1 and 2, measure each output voltage at input voltages 1.75 V and 5.75 V, respectively.
5. VM is the mute pin (pin 7) voltage when the output goes off.
6. IM is the mute pin (pin 7) inflow current when the output goes off.
7. For VG, measure the voltage between pins 3 and 4 (amplifiers 1 and 2), pins 27 and 28 (amplifiers 7 and 8), pins 12 and
13 (amplifiers 3 and 4), and pins 18 and 19 (amplifiers 5 and 6) at f = 1kHz, and use the following formula: VG = 20log
VO/V1dB.