OP162HRU Analog Devices Inc, OP162HRU Datasheet - Page 13

• 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: -

REV. D
The differential gain of the circuit is determined by R
with the R
cuit gain to unity.
The fourth op amp, OP462-D, is optional and is used to im-
prove CMRR by reducing any input capacitance to the ampli-
fier. By shielding the input signal leads and driving the shield
with the common-mode voltage, input capacitance is eliminated
at common-mode voltages. This voltage is derived from the
midpoint of the outputs of OP462-A and OP462-B by using two
10 kW resistors followed by OP462-D as a unity gain buffer.
It is important to use 1% or better tolerance components for the
2 kW resistors, as the common-mode rejection is dependent on
their ratios being exact. A potentiometer should also be con-
nected in series with the OP462-C noninverting input resistor to
ground to optimize common-mode rejection.
The circuit in Figure 41 was implemented to test its settling
time. The instrumentation amp was powered with ± 5 V, so the
input step voltage went from –5 V to +4 V to keep the OP462
within its input range. Therefore, the 0.05% settling range is
when the output is within 4.5 mV. Figure 42 shows the positive
slope settling time to be 1.8 ms, and Figure 43 shows a settling
time of 3.9 ms for the negative slope.
Figure 43. Negative Slope Settling Time
G
Figure 42. Positive Slope Settling Time
resistor value in kW. Removing R
100
100
100
0%
0%
0%
90
10
90
90
10
10
5mV
5mV
5mV
A
DIFF
2V
2V
= 1 +
R
2
G
1 s
1µs
1 s
G
will set the cir-
G
, where:
–13–
Direct Access Arrangement
Figure 44 shows a schematic for a +5 V single supply transmit/
receive telephone line interface for 600 W transmission systems.
It allows full duplex transmission of signals on a transformer
coupled 600 W line. Amplifier A1 provides gain that can be
adjusted to meet the modem output drive requirements. Both
A1 and A2 are configured so as to apply the largest possible
differential signal to the transformer. The largest signal available
on a single +5 V supply is approximately 4.0 V p-p into a 600 W
transmission system. Amplifier A3 is configured as a difference
amplifier to extract the receive information from the transmis-
sion line for amplification by A4. A3 also prevents the transmit
signal from interfering with the receive signal. The gain of A4
can be adjusted in the same manner as A1’s to meet the modem’s
input signal requirements. Standard resistor values permit the
use of SIP (Single In-line Package) format resistor arrays. Couple
this with the OP462 14-lead SOIC or TSSOP package and this
circuit can offer a compact solution.
Figure 44. A Single-Supply Direct Access Arrangement for
Modems
TO TELEPHONE
600
Z
A1, A2 = 1/2 AD8532
A3, A4 = 1/2 AD8532
O
LINE
MIDCOM
671-8005
1:1
T1
6.2V
6.2V
10k
R11
10k
10k
R9
360
R12
R3
2
3
OP162/OP262/OP462
10k
A3
10k
10k
R10
TX GAIN
ADJUST
R5
R6
P1
2k
1
7
1
A1
10k
A2
R13
9.09k
R2
5
2
3
6
14.3k
6
5
R14
10k
A4
R1
RX GAIN
ADJUST
2k
10 F
7
0.1 F
P2
C1
5V DC
0.1 F
C2
R7
10k
R8
10k
TRANSMIT
RECEIVE
RXA
TXA