LM146 LM246 LM346 PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIER PROGRAMMABLE ELECTRICAL CHARAC- TERISTICS LOW SUPPLY CURRENT (250A/amplifier) GAIN-BANDWITH PRODUCT : 1MHz LARGE DC VOLTAGE GAIN : 120dB LOW NOISE VOLTAGE : 28nV/Hz 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 program- mable amplifiers. Two external resistors (R ) al- set N low the user to program the gain-bandwith prod- DIP16 (Plastic Package) uct, 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 resis- tance. In a similar way other amplifier characteris- tics can be tailored to the application. Except for the two programming pins at the end of PIN CONNECTIONS (top view) the package the LM346 pin out is the same as the LM324 and LM348. PROGRAMMING EQUATIONS : Total supply current = 1mA (I = 10A) set Gain bandwith product = 1MHz (I = 10A) set Slew rate = 0.5V/s (I = 10) set Output 4 1 16 Output 1 Input bias current 30nA (I = 10) set 15 Inverting Input 4 Inverting Input 1 2 - - I = current into pin 8 and pin 9 (see schematic set diagram) + 3 + 14 Non-inverting input 4 Non-inverting input 1 + - V 4 13 V CC CC Vcc+ Vcc- 0.6V I = ----------------------------------------------------- 5 12 Non-inverting input 3 Non-inverting Input 2 set R set 6 11 Inverting input 3 Inverting Input 2 ORDER CODE 10 Output 3 7 Output 2 Set 8 Set 9 Package Part Temperature Number Range N LM146 -55C, +125C LM246 -40C, +105C LM346 0C, +70C Example : LM246N N = Dual in Line Package (DIP)) April 2003 1/4LM146-LM246-LM346 SCHEMATIC DIAGRAM (1/4 LM146) ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Supply voltage 22 V CC 1) V 15 V i l Input Voltage V Differential Input Voltage 30 V id 2) Infinite Output Short-circuit Duration mW P Power Dissipation 500 tot Opearting Free-air Temperature Range LM146 -55 to +125 T C oper LM246 40 to +105 LM346 0 to +70- T Storage Temperature Range -65 to +150 C stg 1. For supply voltage less than 15V, the absolute maximum input voltage is equal to the supply voltage. 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 will be exceeded. 2/4