LM146

LM146/LM346 Programmable Quad Operational Amplifiers August 2000 LM146/LM346 Programmable Quad Operational Amplifiers General Description The LM146 series of quad op amps consists of four independent, high gain, internally compensated, low power, programmable amplifiers. Two external resistors (RSET) allow the user to program the gain bandwidth 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 similar way, other amplifier characteristics can be tailored to the application. Except for the two programming pins at the end of the package, the LM146 pin-out is the same as the LM124 and LM148. Features (ISET=10 µA) n Programmable electrical characteristics n Battery-powered operation n Low supply current: 350 µA/amplifier n Guaranteed gain bandwidth product: 0.8 MHz min n Large DC voltage gain: 120 dB n Low noise voltage: 28 n Wide power supply range: ±1.5V to ±22V n Class AB output stage–no crossover distortion n Ideal pin out for Biquad active filters n Input bias currents are temperature compensated Connection Diagram Dual-In-Line Package PROGRAMMING EQUATIONS Total Supply Current = 1.4 mA (ISET/10 µA) Gain Bandwidth Product = 1 MHz (ISET/10 µA) Slew Rate = 0.4V/µs (ISET/10 µA) Input Bias Current . 50 nA (ISET/10 µA) ISET = Current into pin 8, pin 9 (see schematic-diagram) 00565401 Top View Order Number ...