1
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
•Block diagram
1ch
2ch
VCC
OUT2
– IN2
+ IN2
OUT1
– IN1
+ IN1
VEE 4
3
2
1 8
7
5
6
+–
–
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.
2
Standard ICs BA4558 / BA4558F / BA4558N
•Internal circuit configuration
VCC
– IN
+ IN
VEE
R1
R9
R8
R7
R6
R5
R4
R3R2
Q5Q13
Q15
Q11
Q12 Q14
Q8
Q9
Q10
Q6
Q4Q3
Q2Q1
Q7
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) .
3
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 RS ⬉ 10kΩ
Input offset current IIO — 5 200 nA
Input bias current IB— 60 500 nA
High-amplitude voltage gain AV86 100 — dB
Common-mode input voltage VICM ± 12 ± 14 — V
Maximum output voltage VOH ± 12 ± 14 — V RL ⭌ 10kΩ
Minimum output voltage VOL ± 10 ± 13 — V RL ⭌ 2kΩ
Common-mode rejection ratio CMRR 70 90 — dB RS ⬉ 10kΩ
Power supply voltage rejection ratio PSRR — 30 150 µV / V RS ⬉ 10kΩ
Slew rate S.R. — 1.0 — V / µs
Channel separation CS — 105 — dB f = 1kHz
ConditionsMin.
RL ⭌ 2kΩ, VO = ± 10V
AV = 1, RL ⭌ 2kΩ
•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
0 25 50 75 85 100 125 150
BA4558N
BA4558F
BA4558
4
5
3
20± 10 ± 20
POWER SUPPLY VOLTAGE: V± (V)
QUIESCENT CURRENT: IQ (mA)
Fig.2 Quiescent current vs. power
supply voltage
1M 10M
120
100
80
60
40
20
01 10 100 1k 10k 100k
FREQUENCY: f (Hz)
OPEN LOOP GAIN: AV (dB)
Fig.3 Open loop voltage gain vs.
frequency
32
28
24
20
16
12
8
4
0
100 1k 10k 100k 1M
FREQUENCY: f (Hz)
MAXIMUM OUTPUT VOLTAGE: VOM (V)
Fig.4 Maximum output voltage vs.
frequency
100
80
60
40
– 200 20406080
AMBIENT TEMPERATURE: Ta (°C)
INPUT BIAS CURRENT: IB (mA)
Fig.5 Input bias current vs. ambient
temperature
100
75
50
25010203040
POWER SUPPLY VOLTAGE: V+ (V)
INPUT BIAS CURRENT: IB (nA)
Fig.6 Input bias current vs. power
supply voltage
4
Standard ICs BA4558 / BA4558F / BA4558N
+ 5
0
– 5
– 5
0
5
0 20406080
TIME (µs)
INPUT VOLTAGE OUTPUT VOLTAGE
VIN (V) VOUT (V)
Fig.7 Output response characteristics
•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 (VICM).
VCC
VEE
To potential
in VICM +
–
Fig.9 Unused circuit connections
5
Standard ICs BA4558 / BA4558F / BA4558N
•External dimensions (Units: mm)
BA4558 BA4558F
BA4558N
DIP8 SOP8
SIP8
0.5 ± 0.1
3.2 ± 0.2 3.4 ± 0.3
85
14
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
85
41
1.5 ± 0.1
10.5 ± 0.5
18
2.54
3.5 ± 0.5
1.3
0.8
0.6 0.3 ± 0.1
2.8 ± 0.2
19.3 ± 0.2
1.2
5.8 ± 0.2