BA4558 ROHM

Standard ICs Dual operational amplifier BA4558 / BA4558F / BA4558N The BA4558, BA4558F, and BA4558N are monolithic ICs with two operational amplifiers featuring low power con- sumption and internal phase compensation mounted on a single silicon chip. These products offer high speed, a wide band width, and low noise. Outstanding thermal characteristics and voltage gain band width make these ICs ideal for use in a wide variety of electronic circuits. The BA4558 comes in an 8-pin DIP package and is compatible with the 4558 operational amplifi- er. The BA4558F comes in an 8-pin SOP package, and the BA4558N in an 8-pin SIP package. Applications Active filters Audio amplifiers VCOs Other electronic circuits Features 1) Low power dissipation of approximately 50mW 4) No latch-up. (typ.). 5) Wide range of common mode and differential volt- 2) Built-in output short-circuit protection circuit. age. 3) Internal phase compensation. 6) High gain and low noise. Block diagram BA4558 / BA4558F BA4558N OUT1 1 8 VCC + + 1ch 2ch IN1 2 7 OUT2 1ch + 2ch + + IN1 3 6 IN2 VEE 4 5 + IN2 1 OUT1 1 IN1 2 + IN1 3 VEE 4 + IN2 5 IN2 6 OUT2 7 VCC 8Standard ICs BA4558 / BA4558F / BA4558N Internal circuit configuration VCC R1 Q7 Q5 Q13 Q11 Q8 R6 Q15 Q1 Q2 IN Q9 R8 R7 R5 + IN Q14 Q12 OUT Q6 Q10 Q3 Q4 D R9 R2 R3 R4 VEE Absolute maximum ratings (Ta = 25C) Limits Parameter Symbol Unit BA4558 BA4558F BA4558N Power supply voltage VCC 18 18 18 V * * * Power dissipation Pd 800 550 900 mW Differential input voltage VID 30 30 30 V Common-mode input voltage VI 15 15 15 V Operating temperature Topr 40 ~ + 85 40 ~ + 85 40 ~ + 85 C Storage temperature Tstg 55 ~ + 125 55 ~ + 125 55 ~ + 125 C Refer to Pd characteristics diagram. * The values for the BA4558F are those when it is mounted on a glass epoxy board ( 50mm 50mm 1.6mm) . 2