AN1653 データシートの表示（PDF） - Intersil
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AN1653 Datasheet PDF : 5 Pages
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IN-
IN+
VCM
IN -
IN +
VREF
VREF GND
Application Note 1653
RIN-
10kΩ
RIN+
10kΩ
IN- -
IN+ +
RREF+
100kΩ
RF
100kΩ
VP
V+
V-
VN
ISL70218 (1/2)
0Ω
VOUT
RL
DNP
FIGURE 2. BASIC AMPLIFIER CONFIGURATION
J1
R1
DNP
J2
R2
DNP
R3
R4
R9
0
10k
100k
C1
OPEN
R10
10k
VREF
R6
R12
DNP
100k
OUTPUT
IN-
IN+
FIGURE 3. INPUT STAGE (1/2)
User-selectable Options
Component pads are included to enable a variety of
user-selectable circuits to be added to the amplifier VREF,
inputs, outputs, and the amplifier feedback loops.
A voltage divider (Figure 3, R6 and R12) can be added to
establish a power supply-tracking common mode reference
using the VREF input. The input stages (see Figure 3) have
additional resistor and/or capacitor pads that maybe used to
add voltage divider networks or feedback networks for adding
input attenuation, or to establish input DC offsets through the
VREF pin. The ouptut stages (see Figure 4) have additional
resistor and capacitor placements for loading.
NOTE: Operational amplifiers are sensitive to output
capacitance and may oscillate. In the event of oscillation,
reduce output capacitance by using shorter cables, or add a
resistor in series with the output.
FROM OUTPUT
C6
OPEN
R26
0
FIGURE 4. OUTPUT STAGE (1/2)
2
AN1653.0
July 7, 2011
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