OP162HRU Analog Devices Inc, OP162HRU Datasheet - Page 10

• 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
Input Overvoltage Protection
The input voltage should be limited to ± 6 V or damage to the
device can occur. Electrostatic protection diodes placed in the
input stage of the device help protect the amplifier from static
discharge. Diodes are connected between each input as well as
from each input to both supply pins as shown in the simplified
equivalent circuit in Figure 27. If an input voltage exceeds
either supply voltage by more than 0.6 V, or if the differential
input voltage is greater than 0.6 V, these diodes begin to ener-
gize and overvoltage damage could occur. The input current
should be limited to less than 5 mA to prevent degradation or
destruction of the device.
This can be done by placing an external resistor in series with
the input that could be overdriven. The size of the resistor can
be calculated by dividing the maximum input voltage by 5 mA.
For example, if the differential input voltage could reach 5 V,
the external resistor should be 5 V/5 mA = 1 kW. In practice,
this resistance should be placed in series with both inputs to
balance any offset voltages created by the input bias current.
Output Phase Reversal
The OP162/OP262/OP462 is immune to phase reversal as long
as the input voltage is limited to ± 6 V. Figure 24 shows a photo
of the output of the device with the input voltage driven beyond
the supply voltages. Although the device’s output will not
change phase, large currents due to input overvoltage could
result, damaging the device. In applications where the possibility
of an input voltage exceeding the supply voltage exists, over-
voltage protection should be used, as described in the previous
section.
Power Dissipation
The maximum power that can be safely dissipated by the
OP162/OP262/OP462 is limited by the associated rise in junc-
tion temperature. The maximum safe junction temperature is
150∞C, and should not be exceeded or device performance
could suffer. If this maximum is momentarily exceeded, proper
circuit operation will be restored as soon as the die temperature
is reduced. Leaving the device in an “overheated” condition for
an extended period can result in permanent damage to the device.
To calculate the internal junction temperature of the OPx62,
the following formula can be used:
where: T
The power dissipated by the device can be calculated as:
where:
P
q
T
I
V
V
JA
DISS
J
A
LOAD
S
OUT
= OPx62 junction temperature;
= Ambient temperature of the circuit.
= OPx62 package thermal resistance, junction-to-
is the OPx62 supply voltage; and
= OPx62 power dissipation;
ambient; and
is the OPx62 output voltage.
is the OPx62 output load current;
P
DISS
T
J
= I
= P
LOAD
DISS
¥ (V
¥ q
JA
S
+ T
– V
A
OUT
)
–10–
Figures 30 and 31 provide a convenient way to see if the device
is being overheated. The maximum safe power dissipation can
be found graphically, based on the package type and the ambi-
ent temperature around the package. By using the previous
equation, it is a simple matter to see if P
power derating curve. To ensure proper operation, it is impor-
tant to observe the recommended derating curves shown in
Figures 30 and 31.
Figure 30. Maximum Power Dissipation vs. Temperature
for 8-Pin Package Types
Figure 31. Maximum Power Dissipation vs. Temperature
for 14-Pin Package Types
Unused Amplifiers
It is recommended that any unused amplifiers in a dual or a
quad package be configured as a unity gain follower with a 1 kW
feedback resistor connected from the inverting input to the
output and the noninverting input tied to the ground plane.
Power On Settling Time
The time it takes for the output of an op amp to settle after a
supply voltage is delivered can be an important consideration in
some power-up sensitive applications. An example of this
would be in an A/D converter where the time until valid data
can be produced after power-up is important.
The OPx62 family has a rapid settling time after power-up.
Figure 32 shows the OP462 output settling times for a single
supply voltage of V
used to find the power on settling times for the device.
2.0
1.5
1.0
0.5
2.0
1.5
1.0
0.5
0
0
–40
–40
14-PIN TSSOP
8-PIN TSSOP
–20
14-PIN SOIC
–20
8-PIN SOIC
PACKAGE
PACKAGE
PACKAGE
PACKAGE
S
= +5 V. The test circuit in Figure 33 was
0
0
AMBIENT TEMPERATURE – C
AMBIENT TEMPERATURE – C
20
20
40
40
60
60
DISS
80
80
exceeds the device’s
100
100
120
120
REV. D