General Description
The
LR324 consists of four independent, high gain and
internally frequency compensated operational amplifi-
ers. It is specifically designed to operate from a single
power supply. Operation from split power supply is
also possible and the low power supply current drain is
independent of the magnitude of the power supply
voltages.
The
LR324 series are Compatible with Industry stan-
dard 324.
The
LR324 series are available in 2 Packages: DIP-14
and SOIC-14.
Features
Internally Frequency Compensated
Large Voltage Gain
Low Input Bias Current
Low Input Offset Voltage
Large Output Voltage Swing
Wide Power Supply Voltage Range:
Single Supply 3V to
30V or
Dual Supplies
1.5V to
15V
Low Supply Current Drain:
600 A
Applications
Battery Charger
Cordless Telephone
Switching Power Supply
Figure 1. Package Types of
LR324
DIP-14
SOIC-14
LESHAN RADIO COMPANY, LTD.
LR3241/10
Functional Block Diagram
Figure 3. Functional Block Diagram of
LR324
(Each Amplifier)
Pin Configuration
Figure 2. Pin Configuration of
LR324
Top View
M Package/P Package
INPUT 1-
INPUT 1+
V
CC
INPUT 2+
INPUT 2-
OUTPUT 2
OUTPUT 1
14 OUTPUT 4
13 INPUT 4-
12 INPUT 4+
11 GND
10 INPUT 3+
9 INPUT 3-
8 OUTPUT 3
1
2
3
4
5
6
7
(SOIC-14/DIP-14)
Q2
Q4
Q3
Q1
Q8
Q9
6uA
4uA
Q10
Q11
50uA
Q5
Q6
Q13
Rsc
Cc
100uA
Q7
INPUT-
INPUT+
OUTPUT
Q12
V
CC
LESHAN RADIO COMPANY, LTD.
LR3242/10
Parameter
Symbol
Value
Unit
Power Supply Voltage
V
CC
32
V
Differential Input Voltage
V
ID
32
V
Input Voltage
V
IC
-0.3 to
32
V
Output Short Circuit to Ground (One Amplifier)
V
CC
12V and T
A
= 25
o
C
Continuous
Power Dissipation
Operating Temperature Range
T
OP
-
30 to 85
o
C
Storage Temperature Range
T
STG
-
55 to 125
o
C
Absolute Maximum Ratings
Ordering Information
Package
Temperature Range
Part Number
Packing Type
SOIC-14
-40 to 85
o
C
LR324M
Tube/Reel
DIP-14
LR324P
Tube
Some of our products are available in Lead Free packages; If buyers need Lead Free product, please add -E1 after
the part number in your order. For example,
LR358M is a standard tin-lead product, LR358M-E1 means a Lead
Free product.
LESHAN RADIO COMPANY, LTD.
LR3243/10
P
D
720
mW
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Offset Voltage
V
IO
V
O
: 1.4V, RS: 0 , V
CC
: from 5V to 15V
2 7 mV
Input Bias Current
I
BIAS
I
IN
+ or I
IN
-, V
CM
=0V
45
2
50
nA
Input Offset Current
I
IO
I
IN
+ or I
IN
-
,
V
CM
=0V
5
50
nA
Input Common
Mode Voltage Range
V
IR
V
CC
=15V
0
V
CC
-1.5
V
Supply Current
I
CC
R
L
=
Over full tem-
perature range on all
OP Amps
0.6
2
mA
V
CC
=
30V
1.5
3
Large Signal
Voltage Gain
G
V
V
CC
=15V, R
L
V
O
=1V to 11V
25
100
dB
Common Mode
Rejection Ratio
CMRR
DC, V
CC
=15V, V
CM
=0V to (V
CC
-1.5)V
65
8
0
dB
Power Supply
Rejection Ratio
PSRR
V
CC
=5V to 15V
65
100
dB
Channel Separation
(Note 6)
CS
f=1KHz to 20KHz (Input Referred)
120
dB
Output
Current
Source
I
SOURCE
V+=1V, V- =0V, V
CC
=15V, V
O
=2V
20
4
0
mA
Sink
I
SINK
CC
=+5V, GND=0V, T
A
=25
o
C unless otherwise specified.
Electrical Characteristics
LESHAN RADIO COMPANY, LTD.
LR3244/10
V- =1V, V+=0V, V
CC
=15V, V
O
=2V
10
20
mA
Typical Performance Characteristics
Figure 4. Input Voltage Range
Figure 5. Input Current
Figure 7. Voltage Gain
Figure 6. Supply Current
Figure 8. Open Loop Frequency Response
0
2
4
6
8
0
1
2
3
4
5
6
7
8
POSITIVE
NEGATIVE
0
2
4
6
8
10
12
14
16
18
20
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
T
A
= 0
o
C TO 85
o
C
1HZ
10HZ
100HZ
1kHZ
10kHZ
100kHZ
1MHZ
0
10
20
30
40
50
60
70
80
90
100
110
T
A
: -40
o
C TO 85
o
C V
CC
:10V TO 15V
DC
Power Supply Voltage (V)
S
u
pp
ly Cur
ren
t Dra
in (m
A)
V
o
lt
ag
e Ga
i
n
(
d
B
)
Power Supply Voltage (V)
Frequency (Hz)
V
o
ltage Gain (
d
B)
Figure 9. Voltage Follower Pulse Response
In
pu
t
-40
-20
0
20
40
60
80
100
120
0
5
10
15
20
25
30
V
CC
=15V
Time (uS)
Ou
tpu
t
Power Supply Voltage (V)
Inp
ut V
o
ltag
e (
V
)
Inp
ut Cu
r
r
e
n
t (n
A)
Temperature (
o
C)
A
I
D
mA
V
CC
R 10M
V
IN
V
CC
/2
V
O
V
CC
0.1uF
0
2
4
6
8
10
12
14
16
18
20
60
70
80
90
100
110
120
R
L
=2K
R
L
=20K
V
o
lt
ag
e (V
)
V
o
lt
ag
e (V
)
0
3
1
2
0
1
3
2
0
10
20
30
40
50
V
CC
=15V
R
L
= 2K
LESHAN RADIO COMPANY, LTD.
LR3245/10
Typical Performance Characteristics (Continued)
Figure 11. Large Signal Frequency Response
Figure 12. Output Characteristics Current Sourcing
Figure 14. Current Limiting
1K
10K
100K
1000K
0
5
10
15
20
Figure 10. Voltage Follower Pulse Response
(Small Signal)
Out
put
V
o
l
t
a
ge
(m
V)
-40
-20
0
20
40
60
80
0
10
20
30
40
50
60
70
80
90
100
Ou
tp
ut S
w
in
g (
V
P-P
)
Temperature (
o
C)
O
u
t
p
ut
Curre
nt
(mA
)
R
2K
R 100K
R 1K
V
IN
+7V
DC
V
O
+15
V
DC
I
O
50pF
V
IN
V
OUT
400
0
10
20
30
40
50
300
250
350
450
500
550
600
1E-3
0.01
0.1
1
10
100
1
2
3
4
5
6
7
8
INDEPENDENT OF V
CC
, T
A
= 25
o
C
Ou
t
p
u
t
V
o
l
t
a
g
e
Re
feren
ce T
o
V
CC
(V)
Output Source Current (mA)
Vo
V
CC
I
O
V
CC
/2
T
A
= 25
o
C
V
CC
= 15V
Time (uS)
Frequency (Hz)
1E-3
0.01
0.1
1
10
100
0.01
0.1
1
10
V
CC
=+5V
V
CC
=+15V
Figure 13. Output Characteristics Current Sinking
Outp
ut V
o
ltag
e
(
V
)
Output Sink Current (mA)
V
CC
/2
Vo
V
CC
I
O
LESHAN RADIO COMPANY, LTD.
LR3246/10
Typical Applications
Figure 16. DC Summing Amplifier
Figure 17. Power Amplifier
R6 100K
V
O
R5
100K
R1 100K
R2 100K
R3 100K
R4 100K
+V
1
+V
2
+V
3
+V
4
1/4
LR324
+
-
R1 910K
V
O
R2 100K
R3 91K
V
IN(+)
V
CC
R
L
1/4
LR324
-
+
Figure 15. Battery Charger
AC
Line
SMPS
R2
Current
Sense
R7
R8
Battery
Pack
R4
R3
LR431
R5
R6
R1
Opto
Isolator
V
CC
GND
GND
-
+
1/4
LR324
+
-
1/4
LR324
LESHAN RADIO COMPANY, LTD.
LR3247/10
Typical Applications (Continued)
Figure 20. Pulse Generator
Figure 19. AC Coupled Non-Inverting Amplifier
Figure 21. DC Coupled Low-Pass RC Active Filter
R5 100K
R3 100K
R4
100K
R2 100K
R1 1M
V
O
V
CC
1/4
LR324
0.001uF
-
+
R4 51K
V
CC
R
B
6.2K
R3
51K
R1 100K
R2 1M
C1
0.1uF
R5
51K
C
O
V
O
1/4
LR324
R
L
10K
A
V
=1+R2/R1
A
V
=11 (As shown)
-
+
AC
R2 16K
R1 16K
V
IN
R3
100k
1/4
LR324
R4
100k
C2
0.01uF
C1 0.01uF
f
0
V
0
0
fo=1KHz
Q=1
A
V
=2
+
-
V
CC
R4
3K
R3
2K
+
-
2V
+
-
2V
I1
I2
1mA
1/4
LR324
R1
2K
R2
-
+
Figure 18. Fixed Current Sources
LESHAN RADIO COMPANY, LTD.
LR3248/10
DIP-14
Mechanical Dimensions
Unit: mm
LESHAN RADIO COMPANY, LTD.
LR3249/10
Mechanical Dimensions (Continued)
SOIC-14
Unit: mm
LESHAN RADIO COMPANY, LTD.
LR32410/10
PDF 
ZIP