Dual operational amplifier The BA8, BA8F, and BA8N are monolithic ICs with two operational amplifiers featuring low power consumption 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 BA8 comes in an 8-pin DIP package and is compatible with the 8 operational amplifier. The BA8F comes in an 8-pin SOP package, and the BA8N in an 8-pin SIP package. Applications Active filters Audio amplifiers VCOs Other electronic circuits Features 1) Low power dissipation of approximately mw (typ.). ) Built-in output short-circuit protection circuit. 3) Internal phase compensation. ) No latch-up. ) Wide range of common mode and differential voltage. 6) High gain and low noise. Block diagram BA8 / BA8F BA8N OUT1 1 8 IN1 IN1 3 1ch ch 7 6 OUT IN 1ch ch VEE IN OUT1 1 IN1 IN1 3 VEE IN IN 6 OUT 7 8 1
Internal circuit configuration R1 Q7 Q Q13 Q11 Q8 R6 Q1 IN Q1 Q Q9 IN R R7 Q1 R8 Q1 Q6 OUT Q3 Q Q1 R R3 R R9 D VEE Absolute maximum ratings (Ta = C) Limits Parameter Symbol BA8 BA8F BA8N Unit Power supply voltage ± 18 ± 18 ± 18 V Power dissipation Pd 8 9 mw Differential input voltage VID ± 3 ± 3 ± 3 V Common-mode input voltage VI ± 1 ± 1 ± 1 V Operating temperature Topr ~ 8 ~ 8 ~ 8 C Storage temperature Tstg ~ 1 ~ 1 ~ 1 C Refer to Pd characteristics diagram. The values for the BA8F are those when it is mounted on a glass epoxy board ( mm mm 1.6mm).
Electrical characteristics (unless otherwise noted, Ta = C, = 1V, VEE = 1V) Parameter Symbol Min. Typ. Max. Unit Conditions Input offset voltage VIO. 6. mv RS 1kΩ Input offset current IIO na Input bias current IB 6 na High-amplitude voltage gain AV 86 1 db RL kω, VO = ± 1V Common-mode input voltage VICM ± 1 ± 1 V Maximum output voltage VOH ± 1 ± 1 V RL 1kΩ Minimum output voltage VOL ± 1 ± 13 V RL kω Common-mode rejection ratio CMRR 7 9 db RS 1kΩ Power supply voltage rejection ratio PSRR 3 1 µv / V RS 1kΩ Slew rate S.R. 1. V / µs AV = 1, RL kω Channel separation CS 1 db f = 1kHz Electrical characteristic curves 1 1 POWER DISSIPATION: Pd (mw) 1 8 6 BA8N BA8 BA8F QUIESCENT CURRENT: IQ (ma) 3 OPEN LOOP GAIN: AV (db) 1 8 6 7 8 1 1 1 ± 1 ± 1 1 1 1k 1k 1k 1M 1M AMBIENT TEMPERATURE: Ta ( C) POWER SUPPLY VOLTAGE: V ± (V) FREQUENCY: f (Hz) Fig.1 Power dissipation vs. ambient temperature Fig. Quiescent current vs. power supply voltage Fig.3 Open loop voltage gain vs. frequency 3 1 1 MAXIMUM OUTPUT VOLTAGE: VOM (V) 8 16 1 8 1 1k 1k 1k 1M INPUT BIAS CURRENT: IB (ma) 8 6 6 8 INPUT BIAS CURRENT: IB (na) 7 1 3 FREQUENCY: f (Hz) AMBIENT TEMPERATURE: Ta ( C) POWER SUPPLY VOLTAGE: V (V) Fig. Maximum output voltage vs. frequency Fig. Input bias current vs. ambient temperature Fig.6 Input bias current vs. power supply voltage 3
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) VOUT (V) 6 8 COMMON MODE INPUT VOLTAGE: VICM (V) 1 1 ± 1 ± TIME (µs) POWER SUPPLY VOLTAGE: V ± (V) Fig.7 Output response characteristics 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 potential within the in-phase input voltage range (VICM). To potential in VICM VEE Fig.9 Unused circuit connections
External dimensions (Units: mm) BA8 BA8F 3. ±. 3. ±.3.1Min. 9.3 ±.3 8 1 6. ±.3 7.6.. ±.1 ~ 1.3 ±.1 6. ±.3 1. ±.1.11. ±. 1 1.7. ±. 8. ±.1.3Min..1 ±.1.1 DIP8 SOP8 BA8N 19.3 ±..8 ±. 1. ±..8 ±. 3. ±. 1. 1 8..6.3 ±.1.8 1.3 SIP8