LM246D 반도체 회로 부품 판매점
PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS
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 STMicroelectronics |
LM146
LM246 - LM346
PROGRAMMABLE
QUAD BIPOLAR OPERATIONAL AMPLIFIERS
. PROGRAMMABLE ELECTRICAL CHARAC-
TERISTICS
. BATTERY POWERED OPERATION
. LOW SUPPLY CURRENT (250µA/amplifier)
. GAIN-BANDWIDTH PRODUCT : 1MHz
. LARGE DC VOLTAGE GAIN : 120dB
. LOW NOISE VOLTAGE : 28nV/VHz
. WIDE POWER SUPPLY RANGE : ±1.5V to
±22V
. CLASSE AB OUTPUT STAGE. NO CROSS-
OVER DISTORTION
. OVERLOAD PROTECTION FOR INPUTS AND
OUTPUTS
N
DIP16
(Plastic Package)
D
SO16
(Plastic Micropackage)
DE SC RI P TI O N
The LM346 consists of four independent, high gain,
internally compensated, low power programmable
amplifiers. Two external resistors (Rset) allow the
user to program the gain-bandwith product, slew
rate, supply current, input bias current, input offset
current and input noise. For example the user can
trade-off supply current for bandwidth or optimize
noise figure for a given source resistance. In a simi-
lar way other amplifier characteristics can be
tailored to the application.
Except for the two programming pins at the end of
the package the LM346 pin out is the same as the
LM324 and LM348.
PROGRAMMING EQUATIONS :
Total supply current = 1mA (Iset = 10µA)
Gain-bandwidthproduct = 1MHz (Iset = 10µA)
Slew rate = 0.5V/µs (Iset = 10µA)
Input bias current ≈30 nA (Iset = 10µA)
Iset = current into pin 8 and pin 9
(see schematic diagram)
Iset = VCC + −
VCC − − 0.6V
Rset
ORDER CODES
Part
Number
LM146
LM246
LM346
Temperature
Range
–55oC, +125oC
–40oC, +105oC
0oC, +70oC
Example : LM246N
Package
ND
••
••
••
PIN CONNECTIONS (top view)
Output1 1
Inverting input 1 2
Non-invertinginput 1
3
V+
CC
Non-invertinginput 2
4
5
Inverting input 2
6
Output2 7
Set 8
16 Output4
15 Inverting input 4
14 Non-invertinginput 4
13 VCC
12 Non-invertinginput 3
11 Inverting input 3
10 Output 3
9 Set
November 1997
1/9
SCHEMATIC DIAGRAM (1/4 LM146)
Q15
Q16
LM146 - LM246 - LM346
VCC
Inverting
input
Q1 Q2
VCC VCC
Q17
Q3 Q4
Non-
inverting
input
CC
8pF
Q14
Q13
Q10
Q12
Q11
Q9
Q5
Q21
Q6
Q8
Q7
Q20
R2
1kΩ
Q18
R1
30Ω
Output
VCC VCC
R set
I set
SET
R set
To other op amps
I set
SET
Q19
VCC
or
VCC
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC Supply Voltage
Parameter
Vi Input Voltage - (note 1)
Vid Differential Input Voltage
LM146
±22
±15
±30
LM246
±22
±15
±30
LM346
±22
±15
±30
Unit
V
V
V
Output Short-circuit Duration - (note 2)
Infinite
Ptot
Toper
Tstg
Power Dissipation
N/D Suffix
Operating Free-air Temperature Range
Storage Temperature Range
–55 to +125
–65 to +150
500
–40 to +105
–65 to +150
0 to +70
–65 to +150
mW
oC
oC
Notes : 1. For suppl y voltages l ess than ±15V, the absolute maximum input vol tage is equal to the supply vol tage.
2. Any of the amplifier outputs can be shorted to ground indefinitly ; however more than one should not be
simultaneously shorted as the maximum junction temperature will be exceeded.
2/9
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( stm )
LM246D amplifier
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