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LM246| Datasheet

By datasheet - April 3rd, 2008

LM246, LM246N, LM346, LM346N

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LM146 LM246 LM346

PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIER
s PROGRAMMABLE ELECTRICAL CHARACTERISTICS LOW SUPPLY CURRENT (250uA/amplifier) GAIN-BANDWITH PRODUCT : 1MHz LARGE DC VOLTAGE GAIN : 120dB LOW NOISE VOLTAGE : 28nV/Hz WIDE POWER SUPPLY RANGE / 1.5V to 22V s CLASSE AB OUTPUT STAGE. NO CROSS-OVER DISTORTION s OVERLOAD PROTECTION FOR INPUTS AND OUTPUTS

s s s s s

DESCRIPTION The LM346 consists of four independent, high gain, internally compensated, low power programmable amplifiers. Two external resistors (R set) 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 bandwith or optimize noise figure for a given source resistance. In a similar 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 = 10uA) Gain bandwith product = 1MHz (Iset = 10uA) Slew rate = 0.5V/us (Iset = 10u) Input bias current 30nA (Iset = 10u) Iset = current into pin 8 and pin 9 (see schematic diagram)
I Vcc+ Vcc - 0.6 V se t = ---------------------------------------------------R set

N DIP16 (Plastic Package)

PIN CONNECTIONS (top view)

O u tp u t 1 In v e rtin g In p u t 1 N o n -in v e rtin g in p u t 1 V CC+ N o n -in v e rtin g In p u t 2 In v e rtin g In p u t 2

1 2 3 4 5 6 7 8 + +

16 15 14 13 12 11 10 9

O u tp u t 4 In v e rtin g In p u t 4 N o n -in v e rtin g in p u t 4 V CC N o n -in v e rtin g in p u t 3 In v e rtin g in p u t 3 O u tp u t 3 Set

ORDER CODE
Part Number Temperature Range Package N

O u tp u t 2 Set

LM146 -55 C, +125 C LM246 -40 C, +105 C LM346 0 C, +70 C Example : LM246N
N = Dual in Line Package (DIP))

April 2003

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