ISL281X7SOICEVAL1Z Datasheet, PDF (2/4 Pages) Intersil Corporation – Evaluation Board User’s Guide

Application Note 1508
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 filtering and 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.
J1
R1
DNP
J2
R2
DNP
R8
DNP
R10
DNP
R5
R9
0
10k
R12
10k
R11
100k
C3
OPEN
R14
VREF
R13
DNP
R15
100k
To Output
To IN-
To IN+
FIGURE 3. INPUT STAGE
R18
J12
0
FIGURE 4. OUTPUT STAGE
DEVICE #
C2, C4
C1, C5
C3, C6
D1, D2
U1 (ISL28107FBZ)
U1 (ISL28117FBZ)
U1 (ISL28127FBZ)
R1-R4, R6-R8, R10, R13,
R14, R16, R17, R19, R20
R5, R18
R9, R12
R11, R15
TABLE 1. ISL281X7SOICEVAL1Z COMPONENTS PARTS LIST
DESCRIPTION
COMMENTS
CAP, SMD, 0805, 4.7µF, 50V, 10%, X7R, ROHS
Power Supply Decoupling
CAP, SMD, 0603, 0.01µF, 50V, 10%, X7R, ROHS
Power Supply Decoupling
CAP, SMD, 0603, DNP-PLACE HOLDER, ROHS
User selectable capacitors - not populated
DIODE-RECTIFIER, 40V, 0.5A, ROHS
Reverse Power Protection
OP AMP, SOIC, ROHS
OP AMP, SOIC, ROHS
OP AMP, SOIC, ROHS
RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER User selectable resistors - not populated
RES, SMD, 0603, 0Ω, 1/10W, TF, ROHS
RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS
RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS
Zero ohm user selectable resistors
Gain resistors
Gain resistors
2
AN1508.0
November 9, 2009