ISL282X7SOICEVAL2Z Datasheet, PDF (2/4 Pages) Intersil Corporation – Evaluation Board User’s Guide

Application Note 1509
User-selectable Options
(Figures 3 and 4)
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. The Inputs (Figure 3) have additional resistor
and capacitor, and jumper placements for loading
and/or measurement of frequency sensitive
parameters.
IN- IN+ NODE OUT
The outputs (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.
R10
DNP
R12
DNP
J1
R1
DNP
J2
R2
DNP
R4
R11
0
10k
10k
R13
100k
C1
OPEN
R14
VREF
R15
R18
DNP
100k
To Output
To IN-
To IN+
From Output
C6
OPEN
R26
0
FIGURE 3. INPUT STAGE (1/2)
FIGURE 4. OUTPUT STAGE (1/2)
TABLE 1. ISL282X7SOICEVAL2Z COMPONENTS PARTS LIST
DEVICE #
DESCRIPTION
COMMENTS
C2, C4
CAP, SMD, 0805, 1µF, 50V, 10%, X7R, ROHS
Power Supply Decoupling
C3, C5
CAP, SMD, 0603, 0.01µF, 50V, 10%, X7R, ROHS
Power Supply Decoupling
C1, C6-C10
CAP, SMD, 0603, DNP-PLACE HOLDER, ROHS
User selectable capacitors - not populated
D1
DIODE-RECTIFIER, SMD, SOD-123, 2P, 40V, 0.5A, ROHS Reverse Power Protection
U1 (ISL28207FBZ)
OP AMP, SOIC, ROHS
U1 (ISL28217FBZ)
OP AMP, SOIC, ROHS
U1 (ISL28227FBZ)
OP AMP, SOIC, ROHS
R1-R3, R5-R8, R10, R12, RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER User selectable resistors - not populated
R15, R17, R20,R22,
R28-R30, R32, R34-R36
R5, R18
RES, SMD, 0603, 0Ω, 1/10W,TF, ROHS
Zero ohm user selectable resistors
R11, R14, R21, R24
RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS
Gain resistors
R13, R18, R19, R23
RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS
Gain resistors
2
AN1509.0
November 6, 2009