LM146/LM346
Programmable Quad Operational Amplifiers
General Description
The LM146 series of quad op amps consists of four indepen-
dent, high gain, internally compensated, low power, pro-
grammable amplifiers. Two external resistors (R
SET
) allow
the user to program the gain bandwidth product, slew rate,
supply current, input bias current, input offset current and in-
put noise. For example, the user can trade-off supply current
for bandwidth or optimize noise figure for a given source re-
sistance. In a similar way, other amplifier characteristics can
be tailored to the application. Except for the two program-
ming pins at the end of the package, the LM146 pin-out is
the same as the LM124 and LM148.
Features
(I
SET
=10 A)
n
Programmable electrical characteristics
n
Battery-powered operation
n
Low supply current:
350 A/amplifier
n
Guaranteed gain bandwidth product:
0.8 MHz min
n
Large DC voltage gain:
120 dB
n
Low noise voltage:
28
n
Wide power supply range:
1.5V to
22V
n
Class AB output stageno crossover distortion
n
Ideal pin out for Biquad active filters
n
Input bias currents are temperature compensated
Connection Diagram
PROGRAMMING EQUATIONS
Total Supply Current = 1.4 mA (I
SET
/10 A)
Gain Bandwidth Product = 1 MHz (I
SET
/10 A)
Slew Rate = 0.4V/s (I
SET
/10 A)
Input Bias Current
50 nA (I
SET
/10 A)
I
SET
= Current into pin 8, pin 9 (see schematic-diagram)
Dual-In-Line Package
DS005654-1
Top View
Order Number LM146J, LM146J/883,
LM346M or LM346N
See NS Package Number
J16A, M16A or N16A
May 1999
LM146/LM346
Programmable
Quad
Operational
Amplifiers
1999 National Semiconductor Corporation
DS005654
www.national.com
Schematic Diagram
DS005654-2
www.national.com
2
Absolute Maximum Ratings
(Notes 1, 5)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM146
LM346
Supply Voltage
22V
18V
Differential Input Voltage (Note 1)
30V
30V
CM Input Voltage (Note 1)
15V
15V
Power Dissipation (Note 2)
900 mW
500 mW
Output Short-Circuit Duration (Note 3)
Continuous
Continuous
Operating Temperature Range
-55C to +125C
0C to +70C
Maximum Junction Temperature
150C
100C
Storage Temperature Range
-65C to +150C
-65C to +150C
Lead Temperature (Soldering, 10 seconds)
260C
260C
Thermal Resistance (
jA
), (Note 2)
Cavity DIP (J)
Pd
900 mW
900 mW
jA
100C/W
100C/W
Small Outline (M)
jA
115C/W
Molded DIP (N)
Pd
500 mW
jA
90C/W
Soldering Information
Dual-In-Line Package
Soldering (10 seconds)
+260C
+260C
Small Outline Package
Vapor Phase (60 seconds)
+215C
+215C
Infrared (15 seconds)
+220C
+220C
See AN-450 "Surface Mounting Methods and Their Effect on Product Reliability" for other methods of soldering surface mount de-
vices.
ESD rating is to be determined.
DC Electrical Characteristics
(V
S
=
15V, I
SET
=10 A), (Note 4)
Parameter
Conditions
LM146
LM346
Units
Min
Typ
Max
Min
Typ
Max
Input Offset Voltage
V
CM
=0V, R
S
50
, T
A
=25C
0.5
5
0.5
6
mV
Input Offset Current
V
CM
=0V, T
A
=25C
2
20
2
100
nA
Input Bias Current
V
CM
=0V, T
A
=25C
50
100
50
250
nA
Supply Current (4 Op Amps)
T
A
=25C
1.4
2.0
1.4
2.5
mA
Large Signal Voltage Gain
R
L
=10 k
,
V
OUT
=
10V,
100
1000
50
1000
V/mV
T
A
=25C
Input CM Range
T
A
=25C
13.5
14
13.5
14
V
CM Rejection Ratio
R
S
10 k
, T
A
=25C
80
100
70
100
dB
Power Supply Rejection Ratio
R
S
10 k
, T
A
=25C,
80
100
74
100
dB
V
S
=
5 to
15V
Output Voltage Swing
R
L
10 k
, T
A
=25C
12
14
12
14
V
Short-Circuit
T
A
=25C
5
20
35
5
20
35
mA
Gain Bandwidth Product
T
A
=25C
0.8
1.2
0.5
1.2
MHz
Phase Margin
T
A
=25C
60
60
Deg
Slew Rate
T
A
=25C
0.4
0.4
V/s
Input Noise Voltage
f=1 kHz, T
A
=25C
28
28
Channel Separation
R
L
=10 k
,
V
OUT
=0V to
120
120
dB
12V, T
A
=25C
Input Resistance
T
A
=25C
1.0
1.0
M
Input Capacitance
T
A
=25C
2.0
2.0
pF
Input Offset Voltage
V
CM
=0V, R
S
50
0.5
6
0.5
7.5
mV
www.national.com
3
DC Electrical Characteristics
(Continued)
(V
S
=
15V, I
SET
=10 A), (Note 4)
Parameter
Conditions
LM146
LM346
Units
Min
Typ
Max
Min
Typ
Max
Input Offset Current
V
CM
=0V
2
25
2
100
nA
Input Bias Current
V
CM
=0V
50
100
50
250
nA
Supply Current (4 Op Amps)
1.7
2.2
1.7
2.5
mA
Large Signal Voltage Gain
R
L
=10 k
,
V
OUT
=
10V
50
1000
25
1000
V/mV
Input CM Range
13.5
14
13.5
14
V
CM Rejection Ratio
R
S
50
70
100
70
100
dB
Power Supply Rejection Ratio
R
S
50
,
76
100
74
100
dB
V
S
=
5V to
15V
Output Voltage Swing
R
L
10 k
12
14
12
14
V
DC Electrical Characteristic
(V
S
=
15V, I
SET
=10 A)
Parameter
Conditions
LM146
LM346
Units
Min
Typ
Max
Min
Typ
Max
Input Offset Voltage
V
CM
=0V, R
S
50
,
0.5
5
0.5
7
mV
T
A
=25C
Input Bias Current
V
CM
=0V, T
A
=25C
7.5
20
7.5
100
nA
Supply Current (4 Op Amps)
T
A
=25C
140
250
140
300
A
Gain Bandwidth Product
T
A
=25C
80
100
50
100
kHz
DC Electrical Characteristics
(V
S
=
1.5V, I
SET
=10 A)
Parameter
Conditions
LM146
LM346
Units
Min
Typ
Max
Min
Typ
Max
Input Offset Voltage
V
CM
=0V, R
S
50
,
0.5
5
0.5
7
mV
T
A
=25C
Input CM Range
T
A
=25C
0.7
0.7
V
CM Rejection Ratio
R
S
50
, T
A
=25C
80
80
dB
Output Voltage Swing
R
L
10 k
, T
A
=25C
0.6
0.6
V
Note 1: For supply voltages less than
15V, the absolute maximum input voltage is equal to the supply voltage.
Note 2: The maximum power dissipation for these devices must be derated at elevated temperatures and is dictated by T
jMAX
,
jA
, and the ambient temperature,
T
A
. The maximum available power dissipation at any temperature is P
d
=(T
jMAX
- T
A
)/
jA
or the 25C P
dMAX
, whichever is less.
Note 3: Any of the amplifier outputs can be shorted to ground indefinitely; however, more than one should not be simultaneously shorted as the maximum junction
temperature will be exceeded.
Note 4: These specifications apply over the absolute maximum operating temperature range unless otherwise noted.
Note 5: Refer to RETS146X for LM146J military specifications.
www.national.com
4
Typical Performance Characteristics
Input Bias Current vs I
SET
DS005654-44
Supply Current vs I
SET
DS005654-45
Open Loop Voltage Gain
vs I
SET
DS005654-46
Slew Rate vs I
SET
DS005654-47
Gain Bandwidth Product
vs I
SET
DS005654-48
Phase Margin vs I
SET
DS005654-49
Input Offset Voltage
vs I
SET
DS005654-50
Common-Mode Rejection
Ratio vs I
SET
DS005654-51
Power Supply Rejection
Ratio vs I
SET
DS005654-52
www.national.com
5
PDF 
ZIP