AP358
LOW POWER DUAL OPERATIONAL AMPLIFIERS
Description
The AP358 series consists of two independent, high gain,
internally frequency compensated operational amplifiers
which were designed specifically to operate from a single
power supply over a wide range of voltages. Operation from
split power supplies is also possible and the low power supply
current drain is independent of the magnitude of the power
supply voltage.
Application areas include transducer amplifiers, dc gain
blocks and all the conventional op amp circuits which now can
be more easily implemented in single power supply systems.
For example, the AP358 series can be directly operated off of
the standard +5V power supply voltage which is used in
digital systems and will easily provide the required interface
electronics without requiring the additional ±15V power
supply.
Pin Assignments
( Top View )
OUTPUT 1
INVERTING INPUT 1
NON-INVERTING INPUT 1
GND
1
2
3
4
SOP-8L
AP358
8
7
6
5
V
+
OUTPUT 2
INVERTING INPUT 2
NON-INVERTING INPUT 2
( Top View )
OUTPUT 1
INVERTING INPUT 1
NON-INVERTING INPUT 1
GND
1
2
3
4
PDIP-8L
AP358
8
7
6
5
V
+
OUTPUT 2
INVERTING INPUT 2
NON-INVERTING INPUT 2
Features
•
•
•
•
•
•
•
•
Internally frequency compensated for unity gain
Large dc voltage gain: 100 dB
Very low supply current drain (500μA)-essentially
independent of supply voltage
Wide bandwidth (unity gain): 1 MHz (temperature
compensated)
Input common-mode voltage range includes ground
Differential input voltage range equal to the power supply
voltage
Low input offset voltage: 2mV
Wide power supply range:
•
•
•
•
•
Single supply: 3V to 32V
• Or dual supplies: ±1.5V to ±16V
+
Large output voltage swing: 0V to V - 1.5V
Lead Free packages: SOP-8L and PDIP-8L
SOP-8L and PDIP-8L: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
Application
•
•
•
•
•
Eliminate the need for dual supplies
Compatible with all forms of logic
Two internally compensated op amps
Low power drain suitable for battery operation
Allows direct sensing near GND and V
OUT
also goes to
GND
Unique Characteristics
•
In the linear mode the input common-mode voltage
range includes ground and the output voltage can also
swing to ground, even though operated from only a
single power supply voltage.
The unity gain cross frequency is temperature
compensated.
The input bias current is also temperature compensate.
•
•
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
AP358
Document number: DS31007 Rev. 6 - 2
1 of 16
www.diodes.com
July 2010
© Diodes Incorporated
AP358
LOW POWER DUAL OPERATIONAL AMPLIFIERS
Typical Single-Supply Circuit
(V
+
=5.0V
DC
)
Non-Inverting DC Gain ( 0V Output )
+V
IN
*
+5V
+
1/2 AP358
-
R2
1M
+V
O
V
O
(Volts)
GAIN=1+
R2
R1
=101(as shown)
R1
10K
*R not needed due to temperature independent I
IN
V
IN
(mV)
R
100K
+V
1
+V
2
R
100K
R
100K
+V
3
+V
4
R
100K
R1
910K
+
R
100K
1/2 AP358
-
V
O
R2
100K
V
+
-
R3
91K
+V
IN
1/2 AP358
+
V
O
R
L
R
100K
V
O
=0 V
DC
for V
IN
= 0 V
DC
A
V
=10
Where: V
O
=V
1
+V
2
-V
3
-V
4
(V
1
+V
2
) > (V
3
+V
4
) to keep V > 0 V
DC
O
DC Summing Amplifier
(V
IN'S
> 0 V
DC
and V
O
> 0 V
DC
)
R1
100K
Power Amplifier
-
R2
100K
V
IN
R3
100K
C1
330pF
C2
330pF
R7
470K
1/2 AP358
+
R4
10M
-
1/2 AP358
R5
470K
+
V
O
R8
100K
-
1/2 AP358
f
O
= 1KHz
Q = 50
+
R6
100K
C3
10μF
+
V
+
"BI-QUAD" RC Active Bandpass Filter
AP358
Document number: DS31007 Rev. 6 - 2
2 of 16
www.diodes.com
July 2010
© Diodes Incorporated
AP358
LOW POWER DUAL OPERATIONAL AMPLIFIERS
Typical Single-Supply Circuit
(Continued) (V
+
=5.0V
DC
)
V
+
+
2V R3
- 2K
R1*
0.1
I
L
+
2V
-
R1
2K
R4
2K
V
L
R
L
R2
100
+
-
1/2 AP358
-
1/2 AP358
+
R2
3K
I
1
1mA
I
1
= I
2
R3
1K
I
2
V
O
V
O
=
1V(I
L
)
0.1A
*(Increase R1 for I small)
L
V
L
< V+ -2V
Fixed Current Sources
Current Monitor
V
+
-
1/2 AP358
20mA
-
82
30mA
100
β
> 20
600mA
1/2 AP358
+
LED Driver
-
1/2 AP358
+
R
L
240
+
Lamp Driver
-
1/2 AP358
+V
IN
V
O
+
Driving TTL
R1
1M
R2
100K
0.001μF
IN914
IN914
V
O
= V
IN
Voltage Follower
R1
100K
C
0.001μF
-
-
1/2 AP358
R3
100K
V
+
R4
100K
V
O
+
0
V
+
R3
100K
R2
100K
1/2 AP358
+
R4
100K
+
0
V
O
+
R5
100K
Pulse Generator
Squarewave Oscillator
3 of 16
www.diodes.com
July 2010
© Diodes Incorporated
AP358
Document number: DS31007 Rev. 6 - 2
AP358
LOW POWER DUAL OPERATIONAL AMPLIFIERS
Typical Single-Supply Circuit
(Continued) (V
+
=5.0V
DC
)
I
B
-
-
1/2 AP358
+V
IN
Z
IN
(POLYCARBONATE OR
POLYETHYLENE)
HIGH Z
IN
LOW Z
OUT
2I
B
I
B
C
1μF
2N929*
*hi
β
AT 100 nA
1/2 AP358
+
2I
B
0.001μF
I
B
Z
OUT
V
O
+
+
3R
3M
1/2 AP358
-
AUX AMP
INPUT CURRENT
COMPENSATION
R
IM
I
B
Low Drift Peak Detector
R1
30K
IN914
+V
IN
+
I
O
-
R2 0.01
μF
150K
R3
100K
V
+
R4
100K
1/2 AP358
V
O
+
0
1/ 2 AP358
+
R5
100K
-
I
O
=0.1 amp / volt V
IN
(increase R
E
for I
O
small)
R
L
10
Pulse Generator
0.05μF
R
100K
High Compliance Current Sink
-
+V
C
*
51K
1/2 AP358
+
V
51K
+
/2
-
1/2 AP358
51K
OUTPUT1
R/2
50K
+
100K
OUTPUT2
10K
*WIDE CONTROL VOLTAGE RANGE: 0 V
DC
< V
C
< 2 (V
+
-1.5V
DC
)
Voltage Controlled Oscillator (VCO)
AP358
Document number: DS31007 Rev. 6 - 2
4 of 16
www.diodes.com
July 2010
© Diodes Incorporated
AP358
LOW POWER DUAL OPERATIONAL AMPLIFIERS
Typical Single-Supply Circuit
(Continued) (V
+
=5.0V
DC
)
R
f
10K
+V
IN
R1
10K
+V
REF
-
+
R1
C
IN
10K
-
C
O
0
V
O
R
L
10K
3 Vpp
1/2 AP358
+
R2
10M
V
O
V
IN
R2
100K
V
+
C1
10μF
+
1/2 AP358
+
R3
100K
AV=
R
f
R1
R
B
6.2K
(As shown, A
V
=10)
Comparator with Hysteresis
R1
1M
R1
100K
AC Coupled Inverting Amplifier
R2
1M
+
+
V
R
-
+V
CM
R
R3
1M
R2
1M
1/2 AP358
-
R4
1M
V
O
C1
0.1μF
C
IN
V
IN
+
R3
1M
+
C2
10μF
-
C
O
1/2 AP358
+
R4
100K
V
+
R5
100K
R
B
6.2K
0
V
O
R
L
10K
3 Vpp
V
O
=V
R
A
V
=11(As Shown)
R2
A
V
=1+
R1
Ground Referencing a Differential
Input Signal
C1
0.01μF
R1
16K
R2
16K
C2
0.01μF
AC Coupled Non-Inverting Amplifier
R2
100K
R1
100K
R4
100K
V
IN
+
1/2 AP358
-
R3
100K V
O
R4
100K
V
O
-
1/2 AP358
+V
1
+V
2
R3
100K
-
1/2 AP358
+
V
O
+
f
O
= 1KHz
Q=1
A
V
=2
0
f
O
R4 (CMRR depends on this
R2
R3 resistor ratio match)
R4
V
O
= (1+
)(V
2
-V
1
)
R3
As Shown: V
O
= 2(V
2
-V
1
)
For
=
R1
DC Coupled Low-Pass RC Active Filter
High Input Z, DC Differential Amplifier
AP358
Document number: DS31007 Rev. 6 - 2
5 of 16
www.diodes.com
July 2010
© Diodes Incorporated
