OP162HRU Analog Devices Inc, OP162HRU Datasheet - Page 12

• Manufacturer Part Number: OP162HRU
• Description: IC OPAMP GP R-R 15MHZ LN 8TSSOP
• Manufacturer: Analog Devices Inc

Specifications of OP162HRU

• Rohs Status: RoHS non-compliant
• Amplifier Type: General Purpose
• Number Of Circuits: 1
• Output Type: Rail-to-Rail
• Slew Rate: 13 V/µs
• Gain Bandwidth Product: 15MHz
• Current - Input Bias: 260nA
• Voltage - Input Offset: 25µV
• Current - Supply: 650µA
• Current - Output / Channel: 30mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 12 V, ±1.35 V ~ 6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• -3db Bandwidth: -

OP162/OP262/OP462
PCB Layout Considerations
Because the OP162/OP262/OP462 can provide gain at high
frequency, careful attention to board layout and component
selection is recommended. As with any high speed application,
a good ground plane is essential to achieve the optimum perfor-
mance. This can significantly reduce the undesirable effects of
ground loops and I¥R losses by providing a low impedance refer-
ence point. Best results are obtained with a multilayer board
design with one layer assigned to ground plane.
Chip capacitors should be used for supply bypassing, with one
end of the capacitor connected to the ground plane and the
other end connected within 1/8 inch of each power pin. An
additional large tantalum electrolytic capacitor (4.7 mF–10 mF)
should be connected in parallel. This capacitor does not need to
be placed as close to the supply pins, as it is to provide current
for fast large-signal changes at the device’s output.
APPLICATION CIRCUITS
Single Supply Stereo Headphone Driver
Figure 40 shows a stereo headphone output amplifier that can
be run from a single +5 V supply. The reference voltage is
derived by dividing the supply voltage down with two 100 kW
resistors. A 10 mF capacitor prevents power supply noise from
contaminating the audio signal and establishes an ac ground for
the volume control potentiometers.
0.0001
–100
–110
–120
–130
–140
0.010
0.001
–40
–50
–60
–70
–80
–90
Figure 39. Crosstalk vs. Frequency Graph
Figure 38. THD+N vs. Frequency Graph
20
20
A
V
R
V
V
A
V
R
BANDWIDTH:
<10Hz TO 22kHz
V
IN
L
S
S
IN
V
L
= 1
= 10k
=
= 1.0V rms
=
= 10k
= 1
= 1.0V rms
(0dBV)
2.5V
2.5V
100
100
FREQUENCY – Hz
FREQUENCY – Hz
1k
1k
10k
10k
20k
20k
–12–
The audio signal is ac coupled to each noninverting input
through a 10 mF capacitor. The gain of the amplifier is con-
trolled by the feedback resistors and is: (R2/R1) + 1. For this
example, the gain is 6. By removing R1 altogether, the amplifier
would have unity gain. A 169 W resistor is placed at the output
in the feedback network to short-circuit protect the output of
the device. This would prevent any damage to the device from
occurring if the headphone output became shorted. A 270 mF
capacitor is used at the output to couple the amplifier to the
headphone. This value is much larger than that used for the
input because of the low impedance of headphones, which can
range from 32 W to 600 W or more.
Instrumentation Amplifier
Because of its high speed, low offset voltages and low noise
characteristics, the OP162/OP262/OP462 can be used in a wide
variety of high speed applications, including a precision instru-
mentation amplifier. Figure 41 shows an example of such an
application.
–V
+V
RIGHT IN
LEFT IN
IN
IN
Figure 41. A High Speed Instrumentation Amplifier
OP462-D
5V
Figure 40. Headphone Output Amplifier
10 F
10 F
100k
10k
10k
10 F
L VOLUME
CONTROL
R VOLUME
CONTROL
R1 = 10k
R1 = 10k
R
G
OP462-A
OP462-B
1k
1k
100k
10 F
10 F
10k
OP262-A
OP262-B
5V
R2 = 50k
5V
R2 = 50k
10k
169
169
2k
2k
1.9k
47k
270 F
47k
270 F
200
10 TURN
(OPTIONAL)
OP462-C
2k
HEADPHONE
LEFT
HEADPHONE
RIGHT
REV. D
OUTPUT