LM246D Datasheet | STMicroelectronics

DESCRIPTION The LM346 consists of four independent, high gain, internally pensated, 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 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 = 1m A (Iset = 10µA) Gain-bandwidthproduct = 1MHz (Iset = 10µA) Slew rate = 0.5V/µs (Iset = 10µA) Input bias current ≈30 n A (Iset = 10µA) Iset = current into pin 8 and pin 9 (see schematic diagram) Iset = VCC + - VCC - - 0.6V Rset LM346 Example : LM246N PIN CONNECTIONS (top view) Output1 Inverting input 1 Non-invertinginput 1 V + CC Non-invertinginput 2 Inverting input 2 Output2 Set 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Output4 Inverting input 4 Non-invertinginput 4 VCC Non-invertinginput 3 Inverting input 3 Output 3 Set November 1997 1/9 LM146 - LM246 - LM346 SCHEMATIC DIAGRAM (1/4 LM146) Q15 Q16 V CC Q10 Inverting input Noninverting input R1 30Ω Q12 Q14 Q11 Q13 V CC V CC Q9 R set I set SET Q20 Q8 Q3 Q4 Q21 Q7 R2 1kΩ Q18 Q19 R set To other op amps I set SET Output Q1 Q2 CC 8p F VCC V CC Q6 Q5 Q17 V CC or V CC ABSOLUTE MAXIMUM RATINGS Symbol VCC Vi Vid Supply Voltage Input Voltage - (note 1) Differential Input Voltage Output Short-circuit Duration - (note 2) Ptot Toper Tstg Power Dissipation N/D Suffix Operating Free-air Temperature Range Storage Temperature Range - 55 to +125 - 65 to +150 Parameter LM146 ±22 ±15 ±30 LM246 ±22 ±15 ±30 Infinite m W 500 - 40 to +105 - 65 to +150 0 to +70 - 65 to +150 o o LM346 ±22 ±15 ±30 Unit V V V Notes : 1. For suppl y voltages l ess than ± 15V, the absolute maximum...