BA728N [ROHM]
Dual operational amplifier; 双路运算放大器
| 型号： | BA728N |
| 厂家： | 
ROHM |
| 描述： | Dual operational amplifier |
| 文件： | 总4页 (文件大小：63K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Standard ICs
Dual operational amplifier
BA728 / BA728F / BA728N
The BA728, BA728F, and BA728N are ICs with two independently functioning operational amplifiers featuring inter-
nal phase compensation. These products offer a wide range of operating voltages, from 3 to 18V ( ± 1.5 to 9V) and
are high-performance operational amplifiers which can be driven from a single power supply within the in-phase
mode input range, including a negative power supply.
Applications
•
Ground sensing small-signal amplifiers
Control amplifiers requiring high phase margin, such as motor drivers
Amplifiers operated on low voltages
Capacitive loaded amplifiers
Features
•
supply voltage ranges from ± 1.5 to ± 9V.
6) Output is protected against short-circuits.
7) Output block is operated as a class AB to mini-
mize crossover distortion.
1) Can be driven from a single power supply.
2) Low power.
3) Pin layout is the same as that of the general-
purpose 4558 operational amplifier.
8) Low input bias current of 10nA (typ.).
9) Each package contains two operational amplifiers.
10) Internal phase compensation provided.
4) When driven from a single power supply, the power
supply voltage ranges from 3 to 18V.
5) When driven from a dual power supply, the power
Block diagram
•
BA728 / BA728F
OUT1
1
8
VCC
– IN1
+ IN1
2
3
7
6
OUT2
– IN2
1ch
–
+
2ch
+
–
4
5
VEE
+ IN2
BA728N
1ch
2ch
–
–
1
Standard ICs
BA728 / BA728F / BA728N
Internal circuit configuration
•
OUT
VCC
R5
Q13
Q16
Q18
Q19
Q6
Q24
Q27 Q29
Q25
C1
Q15
Q7
Q3
R1
R2
R4
Q17
Q20
+ IN
– IN
Q2
Q8
R3
Q28
Q23
Q10
Q11
Q12
Q14
Q22
R6
Q21
Q9
Q1
Q26
Q4
Q5
VEE
Absolute maximum ratings (Ta = 25°C)
•
Limits
Parameter
Symbol
Unit
BA728
BA728F
18 ( ± 9)
550
BA728N
18 ( ± 9)
550
VCC
Pd
18 ( ± 9)
800
V
mW
V
Power supply voltage
Power dissipation
VID
VCC
VCC
VCC
Differential input voltage
Common-mode input voltage
Operating temperature
VI
– 0.3 ~ + VCC – 0.3 ~ + VCC – 0.3 ~ + VCC
– 20 ~ + 75 – 20 ~ + 75 – 20 ~ + 75
– 55 ~ + 125 – 55 ~ + 125 – 55 ~ + 125
V
Topr
Tstg
°C
°C
Storage temperature
Refer to Pd characteristics diagram.
The values for the BA728Fare those when it is mounted on a glass epoxy PCB (50mm × 50mm × 1.6mm).
Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = + 6V, VEE = - 6V)
•
Parameter
Input offset voltage
Symbol
VIO
Min.
—
Typ.
2
Max.
10
50
250
—
Unit
mV
nA
Conditions
IIO
—
1
Input offset current
IB
—
10
100
nA
Input bias current
AV
86
dB
RL м 2kΩ
RL м 2kΩ
High-amplitude voltage gain
Common-mode input voltage
Maximum output voltage
Common mode rejection ratio
Power supply voltage rejection ratio
Slew rate
VICM
VOM
4 ~ – 6 4.5 ~ – 6
—
V
± 3.0
70
—
± 4.5
90
—
V
CMRR
PSRR
S. R.
fT
—
dB
30
150
—
µV / V
V / µS
MHz
dB
—
0.7
0.7
120
20
AV = 1, RL = 2kΩ
—
—
Maximum frequency
CS
—
—
Channel separation
source
Maximum output current
sink
Isource
Isink
—
—
mA
mA
VIN+ = 1V, VIN– = 0V
VIN– = 1V, VIN+ = 0V
—
10
—
2
Standard ICs
BA728 / BA728F / BA728N
Measurement circuits
•
VCC
IC
50kΩ
10kΩ
RS
BA728
200
BA728F
BA728N
10kΩ
Ω
–
1Ω
–
V
S
1ch
+
2ch
VO2
VO1
~
50Ω
RL
+
RS
Channel separation
(indicates individual channels
in the same package)
1
VO2
VO1
= – 200 log
·
1000
(per circuit)
VEE
Fig. 1 Channel separation measurement circuit
Electrical characteristic curves
•
1200
30
20
10
3
1000
800
600
400
BA728N
BA728
2
1
0
BA728F
200
0
0
25
50
75
100
125
150
0
10
20
0
10
20
+
+
AMBIENT TEMPERATURE: Ta (°C)
POWER SUPPLY VOLTAGE: V (V)
POWER SUPPLY VOLTAGE: V (V)
Fig.2 Power dissipation vs. ambient
temperature
Fig.3 Quiescent current vs.
power supply voltage
Fig.4 Input bias current vs.
power supply voltage
160
40
30
120
100
80
120
20
10
0
60
40
20
0
80
0
20
40
60
80
0
10
POWER SUPPLY VOLTAGE: V (V)
20
– 20
1
10
100
1k
10k 100k 1M 10M
+
AMBIENT TEMPERATURE: Ta (°C)
FREQUENCY: f (Hz)
Fig.5 Open loop voltage gain vs.
power supply voltage
Fig.6 Current control characteristics
Fig.7 Open loop voltage gain vs.
frequency
3
Standard ICs
BA728 / BA728F / BA728N
Electrical characteristic curve
•
20
10
5
4
3
15
2
1
0
3
10
0
5
0
– 5
2
1
0
– 10
100
1k
10k
100k
1M
0
10
20
30
40
0
± 5
POWER SUPPLY VOLTAGE: V (V)
± 10
±
FREQUENCY: f (Hz)
TIME (µs)
Fig.8 Maximum output voltage vs.
frequency
Fig.10 Maximum output voltage vs.
power supply voltage
Fig.9 Output response characteristics
VCC
Operation notes
•
(1)Unused circuit connections
If there are any circuits which are not being used, we
recommend making connections as shown in Figure
11, with the non-inverted input pin connected to the
potential within the in-phase input voltage range (VICM).
–
To potential
in VICM
+
VEE
Fig.11 Unused circuit connections
External dimensions (Units: mm)
•
BA728
BA728F
BA728N
5.0 ± 0.2
9.3 ± 0.3
8
5
8
5
19.3 ± 0.2
2.8 ± 0.2
1
4
8
1
7.62
1
4
2.54
0.6
0.8
1.3
0.3 ± 0.1
1.27
0.4 ± 0.1
0.3Min.
2.54
0.5 ± 0.1 0° ~ 15°
0.15
DIP8
SOP8
SIP8
4
相关型号：
©2020 ICPDF网 联系我们和版权申明