®
L272
DUAL POWER OPERATIONAL AMPLIFIERS
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.
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OUTPUT CURRENT TO 1 A
OPERATES AT LOW VOLTAGES
SINGLE OR SPLIT SUPPLY
LARGE COMMON-MODE AND DIFFEREN-
TIAL MODE RANGE
GROUND COMPATIBLE INPUTS
LOW SATURATION VOLTAGE
THERMAL SHUTDOWN
Powerdip
(8 + 8)
DESCRIPTION
The L272 is a monolithic integrated circuits in Pow-
erdip, Minidip and SO packages intended for use as
power operational amplifiers in a wide range of ap-
plications including servo amplifiers and power sup-
plies, compacts disc, VCR, etc.
The high gain and high output power capability pro-
vide superior performance whatever an operational
amplifier/power booster combination is required.
PIN CONNECTIONS
(top view)
Minidip
SO16 (Narrow)
ORDERING NUMBERS
: L272 (Powerdip)
L272M (Minidip)
L272D (SO16 Narrow)
L272M
L272D
July 2003
1/10
L272
BLOCK DIAGRAMS
L272
L272D
L272M
SCHEMATIC DIAGRAM
(one only)
2/10
L272
ABSOLUTE MAXIMUM RATINGS
Symbol
V
s
V
i
V
i
I
o
I
p
P
tot
Supply Voltage
Input Voltage
Differential Input Voltage
DC Output Current
Peak Output Current (non repetitive)
Power Dissipation at:
T
amb
= 80°C (L272), T
amb
= 50°C (L272M), T
case
= 90
°C
(L272D)
T
case
= 75
°C
(L272)
Operating Temperature Range (L272D)
Storage and Junction Temperature
Parameter
Value
28
V
s
±
V
s
1
1.5
1.2
5
– 40 to 85
– 40 to 150
A
A
W
W
°C
°C
Unit
V
T
op
T
stg
, T
j
THERMAL DATA
Symbol
R
th j-case
R
th j-amb
R
th j-alumina
Parameter
Thermal Resistance Junction-pins
Thermal Resistance Junction-ambient
Thermal Resistance Junction-alumina
Max.
Max.
Max.
Powerdip
15
70
–
SO16
–
–
** 50
Minidip
* 70
100
–
Unit
o
o
o
C/W
C/W
C/W
* Thermal resistance junction-pin 4
** Thermal resistance junctions-pins with the chip soldered on the middle of an alumina supporting substrate measuring
15x 20mm; 0.65mm thickness and infinite heatsink.
ELECTRICAL CHARACTERISTICS
(V
S
= 24V, T
amb
= 25
o
C unless otherwise specified)
Symbol
V
s
I
s
I
b
V
os
I
os
SR
B
R
i
G
v
e
N
I
N
CRR
SVR
Parameter
Supply Voltage
Quiescent Drain Current
Input Bias Current
Input Offset Voltage
Input Offset Current
Slew Rate
Gain-bandwidth Product
Input Resistance
O. L. Voltage Gain
Input Noise Voltage
Input Noise Current
Common Mode Rejection
Supply Voltage Rejection
f = 100Hz
f = 1kHz
B = 20kHz
B = 20kHz
f = 1kHz
f = 100Hz, R
G
= 10kΩ, V
R
= 0.5V
V
s
= 24V
V
s
=
±
12V
V
s
=
±
6V
I
p
= 0.1A
I
p
= 0.5A
f = 1 kHz; R
L
=10Ω, G
v
= 30dB
V
s
= 24V
V
s
=
±
6V
f = 1kHz, G
v
= 3 dB, V
s
= 24V, R
L
=
∞
60
500
60
70
50
10
200
75
70
62
56
23
22.5
60
60
0.5
145
%
°C
3/10
V
V
dB
V
O
=
V
S
2
V
s
= 24V
V
s
= 12V
Test Conditions
Min.
4
8
7.5
0.3
15
50
1
350
Typ.
Max.
28
12
11
2.5
60
250
Unit
V
mA
mA
µA
mV
nA
V/µs
kHz
kΩ
dB
dB
µV
pA
dB
dB
54
V
o
C
s
Output Voltage Swing
Channel Separation
21
d
T
sd
Distortion
Thermal Shutdown Junction
Temperature
L272
Figure 1
:
Quiescent Current versus
Supply Voltage
Figure 2
:
Quiescent Drain Current versus
Temperature
Figure 3
:
Open Loop Voltage Gain
Figure 4
:
Output Voltage Swing versus
Load Current
Figure 5 :
Output Voltage Swing versus
Load Current
Figure 6 :
Supply Voltage Rejection versus
Frequency
4/10
L272
Figure 7 :
Channel Separation versus
Frequency
Figure 8 :
Common Mode Rejection versus
Frequency
APPLICATION SUGGESTION
NOTE
In order to avoid possible instability occuring into fi-
nal stage the usual suggestions for the linear power
stages are useful, as for instance :
- layout accuracy ;
- a 100nF capacitor corrected between supply pins
and ground ;
- boucherot cell (0.1 to 0.2
µF
+ 1
Ω
series) between
Figure 9
: Bidirectional DC Motor Control with
µP
Compatible Inputs
Figure 10
: Servocontrol for Compact-disc
Figure 11 :
Capstan Motor Control in Video Recorders
5/10
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