No. 6075-2/17
LA8520M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Crosspoint switch voltage gain
Gsw
Vin = –13 dBV
–2.5
–0.5
1.5
dB
Crosspoint switch maximum input level
Vimax
THD = 1.5 %
–13
–7
—
dBV
Crosspoint switch output noise voltage
Nosw
20 to 20 kHz
15
60
μVrms
Microphone amplifier/TR amplifier voltage gain
Gmic
Vin = –53 dBV
38
40
42
dB
Microphone amplifier/TR output distortion
THDmc
Vin = –53 dBV
—
0.6
1.5
%
Microphone amplifier/TR equivalent input noise
voltage
Nimc
Rg = 620
, 20 to 20 kHz
2.5
7.5
μVrms
Microphone amplifier/TR maximum voltage gain
Gmax
40
—
—
dB
Receiver amplifier/OGM amplifier voltage gain
Gre
Vin = –33 dBV
18
20
22
dB
Receiver amplifier/OGM amplifier output
distortion
THDre
Vin = –33 dBV
0.4
1.5
%
Operational amplifier voltage gain
Gop
Vin = –13 dBV
8
10
12
dB
Operational amplifier output distortion
THDop
Vin = –13 dBV
—
0.4
1.5
%
DR amplifier output level
Vodr
Vin = –23 dBV, IN(8), OUT(32), sw(10) on
–16.1
–13.6
–11.1
dBV
DR amplifier output distortion
THDdr
Vin = –23 dBV, IN(8), OUT(32), sw(10) on
0.5
1.5
%
Handset amplifier output level
Vohd
Vin = –16 dBV, IN(9), OUT(34), sw(0B) on
–2
+0.5
+3
dBV
Handset amplifier output distortion
THDhd
Vin = –16 dBV, IN(9), OUT(34), sw(0B) on
—
0.55
1.5
%
Handset amplifier attenuator level 1
Att1
address (51)
2.3
3
3.7
dB
Handset amplifier attenuator level 2
Att2
address (52)
3.45
4.15
4.85
dB
Handset amplifier attenuator level 3
Att3
address (53)
5.4
6.1
6.8
dB
Electronic volume control output level
Voevr
Vin = –20 dBV, IN(9), OUT(28), sw(2D) on
–22.9
–20.4
–17.9
dBV
Electronic volume control step size
Wevr
Vin = –20 dBV, IN(9), OUT(28), sw(2D) on
2.9
3.8
4.6
dB
Electronic volume control output noise voltage
Noevr
20 to 20 kHz, OUT(28)
—
25
60
μVrms
[BTL Power Amplifier]
Voltage gain
Gpwr
Vin = –20 dBV, R
L
= 16
Vin = –30 dBV, R
L
= 16
THD = 10 %, R
L
= 16
Rg = 620
, frin = 100 Hz, Vrin = –20 dBV,
R
L
= 16
Rg = 620
, 20 to 20 kHz, R
L
= 16
18.2
19.7
21.2
dB
Total harmonic distortion
THDpw
—
0.7
1.5
%
Maximum BTL output power
Pomax
250
400
—
mW
Ripple rejection ratio
SVRR
40
50
—
dB
Output noise voltage
Nopw
—
20
60
μVrms
[CPU Interface]
Clock frequency
Fck
—
—
500
kHz
Input signal high level
V
H
V
L
3
—
—
V
Input signal low level
—
—
1.5
V
[V
REF
and Current Drain]
Internal reference voltage (the pin 10 voltage)
Vref
2.1
2.25
2.4
V
Quiescent current 1
Icco1
With the BTL power amplifier on and the
crosspoint switch off
—
21
29
mA
Quiescent current 2
Icco2
With the BTL power amplifier off and the
crosspoint switch off
—
14.5
21
mA
Electrical Characteristics
at Ta = 25°C, V
CC
= 5 V, fin = 1 kHz, R
L
= 10 k