BA4558 ROHM

Document overview

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Technical content

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
  • Block diagram 1ch 2ch VCC OUT2 – IN2 + IN2 OUT1 – IN1 + IN1 VEE 4 1 8 1ch 2ch OUT1 1 – IN1 2 + IN1 3 VEE 4 + IN2 5 – IN2 6 OUT2 7 VCC 8 BA4558 / BA4558F BA4558N
  • Features 1) Low power dissipation of approximately 50mW (typ.). 2) Built-in output short-circuit protection circuit. 3) Internal phase compensation. 4) No latch-up. 5) Wide range of common mode and differential volt- age. 6) High gain and low noise.

Standard ICs BA4558 / BA4558F / BA4558N

  • Internal circuit configuration VCC – IN + IN VEE R 1 R 9 R 8R 7 R 6 R 5 R 4R 3R 2 Q 5 Q 13 Q 15 Q 11 Q 12 Q 14 Q 8 Q 9 Q 10 Q 6 Q 4Q 3 Q 2Q 1 Q 7 OUT D
  • Absolute maximum ratings (Ta = 25°C) Parameter Symbol Limits Unit BA4558 BA4558F BA4558N Power supply voltage VCC – 18 – 18 – 18 V Power dissipation 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 – 55 ~ + 125 – 55 ~ + 125 – 55 ~ + 125°C Pd Tstg * 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) .

Standard ICs BA4558 / BA4558F / BA4558N

  • Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = + 15V, VEE = – 15V) Parameter Symbol Typ. Max. Unit Input offset voltage VIO — 0.5 6.0 mV R S % 10kW Input offset current IIO — 5 200 nA Input bias current IB — 60 500 nA High-amplitude voltage gain AV 86 100 — dB Common-mode input voltage VICM – 12 – 14 — V Maximum output voltage VOH – 12 – 14 — V R L ^ 10kW Minimum output voltage VOL – 10 – 13 — V R L ^ 2kW Common-mode rejection ratio CMRR 70 90 — dB R S % 10kW Power supply voltage rejection ratioPSRR — 30 150 mV / V R S % 10kW Slew rate S.R. — 1.0 — V / ms Channel separation CS — 105 — dB f = 1kHz ConditionsMin. R L ^ 2kW , VO = – 10V AV = 1, RL ^ 2kW
  • Electrical characteristic curves Fig.1 Power dissipation vs. ambient temperature AMBIENT TEMPERATURE: Ta ( °C) POWER DISSIPATION: Pd (mW) 1200 1000 800 600 400 200 0 25 50 75 85 100 125 150 BA4558N BA4558F BA4558 0 – 10 – 20 POWER SUPPLY VOLTAGE: V – (V) QUIESCENT CURRENT: I Q (mA) Fig.2 Quiescent current vs. power supply voltage 1M 10M 120 100 1 10 100 1k 10k 100k FREQUENCY: f (Hz) OPEN LOOP GAIN: AV (dB) Fig.3 Open loop voltage gain vs. frequency 100 1k 10k 100k 1M FREQUENCY: f (Hz) MAXIMUM OUTPUT VOLTAGE: V OM (V) Fig.4 Maximum output voltage vs. frequency 100 – 2 0 0 2 04 06 08 0 AMBIENT TEMPERATURE: Ta ( °C) INPUT BIAS CURRENT: IB (mA) Fig.5 Input bias current vs. ambient temperature 100 01 0 2 0 3 0 4 0 POWER SUPPLY VOLTAGE: V + (V) INPUT BIAS CURRENT: IB (nA) Fig.6 Input bias current vs. power supply voltage

Standard ICs BA4558 / BA4558F / BA4558N + 5 – 5 – 5 0 2 04 0 6 08 0 TIME (ms) INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) VOUT (V) Fig.7 Output response characteristics – 10 – 20 0 – 10 – 20 COMMON MODE INPUT VOLTAGE: V ICM (V) POWER SUPPLY VOLTAGE: V – (V) Fig.8 Common mode input voltage vs. power supply voltage

  • Operation notes (1) Unused circuit connections If there are any circuits which are not being used, we recommend making connections as shown in Figure 9, with the non-inverted input pin connected to the poten- tial within the in-phase input voltage range (V ICM ). VCC VEE To potential in VICM Fig.9 Unused circuit connections

Standard ICs BA4558 / BA4558F / BA4558N

  • External dimensions (Units: mm) BA4558 BA4558F BA4558N DIP8 SOP8 SIP8 0.5 – 0.1 9.3 – 0.3 6.5 – 0.3 0.3 – 0.1 0.51Min. 2.54 0° ~ 15° 7.62 0.4 – 0.11.27 0.15 0.3Min. 0.15 – 0.1 0.11 6.2 – 0.3 4.4 – 0.2 5.0 – 0.2 1.5 – 0.1 10.5 – 0.5 1 8 2.54 3.5 – 0.5 1.3 0.8 0.6 0.3 – 0.1 1.2 5.8 – 0.2