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LM346 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
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LM346 Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
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
N
D
PIN CONNECTIONS (top view)
Output1 1
Inverting input 1 2
Non-invertinginput 1
3
V+ 4
CC
Non-invertinginput 2
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
 

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