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LM346D Datenblatt(PDF) 1 Page - STMicroelectronics

Teilenummer LM346D
Bauteilbeschribung  PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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November 1997
PROGRAMMABLE
QUAD BIPOLAR OPERATIONAL AMPLIFIERS
.
PROGRAMMABLE ELECTRICAL CHARAC-
TERISTICS
.
BATTERY POWERED OPERATION
.
LOW SUPPLY CURRENT (250
µA/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
DESCRIPTION
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 =10
µA)
Gain-bandwidth product = 1MHz (Iset =10
µA)
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
+ − V
CC
− 0.6V
Rset
4
5
6
7
9
10
11
12
13
15
1
2
3
8
16
14
Output 1
Inverting input 1
Non-invertinginput 1
Non-invertinginput 2
Inverting input 2
Output 2
Set
Output 4
Inverting input 4
Non-invertinginput 4
VCC
Non-invertinginput 3
Inverting input 3
Output 3
Set
V
CC
+
PIN CONNECTIONS (top view)
ORDER CODES
Part
Number
Temperature
Range
Package
ND
LM146
–55
oC, +125oC
••
LM246
–40
oC, +105oC
••
LM346
0
oC, +70oC
••
Example : LM246N
N
DIP16
(Plastic Package)
D
SO16
(Plastic Micropackage)
LM146
LM246 - LM346
1/9


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