I N T E G R A L
ILA7050
LOW VOLTAGE MONO/STEREO POWER AMPLIFIER
GENERAL DESCRIPTION
The ILA7050 is a low voltage audio amplifier for small radios with headphones (such as watch, pen and pocket
radios) in mono (bridge-tied load) or stereo applications.
Features
Limited to battery supply application only (typ. 3 and
4 V)
Operates with supply voltage down to 1,6 V
No external components required
Very low quiescent current
Fixed integrated gain of 26 dB, floating differential
input
Flexibility in use - mono BTL as well as stereo
Small dimension of encapsulation (see package design
example)
QUICK REFERENCE DATA
Supply voltage range
Vp
1,6
to 6,0 V
Total quiescent current (at Vp = 3 V)
ltot
typ.
3,2 mA
Bridge tied load application (BTL)
Output power at R) = 32 Q
Vp=3V;dtat=10%
PO
typ.
140 mW
D.C. output offset voltage between the outputs
lAVI
max.
70 mV
Noise output voltage (r.m.s. value)
at f = 1 kHz; Rg = 5 kfit
V
no(rms)
typ.
140 mV
Stereo application
Output power at R( = 32
d
tot
= 10%; Vp = 3V
P
O
typ.
35 mW
d
tot
=
10%; Vp= 4,5V
P
O
typ.
75 mW
Channel separation at Rs = 0
; f = 1 kHz
K
typ.
40 dB
Noise output voltage (r.m.s. value)
at f = 1 kHz; Rs = 5 k
V
no(rms)
typ.
100 mV
PACKAGE OUTLINE 8-lead DIL; plastic (SOT97); SOT97-1;
I N T E G R A L
CHARACTERISTICS Vp = 3 V; f = 1 kHz; R
L
= 32 0., Tamb = 25 C; unless otherwise specified
PARAMETER
SYMBOL MIN.
TYP.
MAX.
UNIT
Supply
Supply voltage
Vp
1,6
-
6,0
V
Total quiescent current
Itot
-
3,2
4
mA
Bridge-tied load application (BTL); see Fig.4
Output power; note 1
Vp = 3,0 V; diet = 10%
P
O
-
140
-
mW
Vp = 4,5 V; diet = 10% (
RL
= 64 Q)
P
O
-
150
-
mW
Voltage gain
G
V
-
32
-
dB
Noise output voltage (r.m.s. value)
R
S
= 5 kQ.-, f = 1 kHz
Vno(rms)
-
140
-
mV
R
S
= 0 Q; f = 500 kHz; B =5 kHz
Vno(rms)
-
tbf
-
mV
D.C. output offset voltage (at Rs = 5 k
)
l
VI
-
-
70
mV
Input impedance (at Rs =
)
IZiI
1
-
-
M
Input bias current
Ii
-
40
-
nA
Stereo application;
Output power; note 1
Vp=3,OV;dtot=10%
P
O
-
35
-
mW
Vp=4,5V;dtot=10%
P
O
-
75
-
mW
Voltage gain
G
V
24.5
26
27.5
dB
Noise output voltage (r.m.s. value)
R
S
= 5 k
; f = 1 kHz
Vno(rms)
-
100
-
mV
R
S
= 0
; f = 500 kHz; B =5 kHz
Vno(rms)
-
tbf
-
mV
Channel separation
R
S
= 0
; f = 1 kHz
K
30
40
-
dB
Input impedance (at Rs =
)
IZjl
2
-
-
M
Input bias current
Ii
-
20
-
nA
Note
1. Output power is measured directly at the output pins of the IC. It is shown as a function of the supply voltage in Fig.2
(BTL application) and Fig.3 (stereo application).
pplication diagram (BTL)
pplication diagram (stereo)
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