GP2W0110YPS Datasheet, PDF (13/14 Pages) Sharp Electrionic Components – Low Power Infrared Transceiver

Low Power Infrared Transceiver
GP2W0110YPS/GP2W0114YPS
Test and Evaluation Board
Sharp Microelectronics has prepared an evaluation
board for preliminary testing of the GP2W0110YPS/
GP2W0114YPS transceiver. This board has also
been developed to support the GP2W0112YPS, and
that is why there are two resistor positions on the
board. In the configuration for GP2W0110YPS/
GP2W0114YPS, R₂ = 0 Ω, and the R₁ position is
open. (The position for R₁ is loaded when the board is
used for another device model.)
The new low power 20 cm transceivers are so small
that soldering directly to the contacts on the device is
not an easy or effective connection method. Testing
with an actual surface mount connection is the best
method for evaluation. The PCB provides the electrical
interface and a good ground-plane for test purposes.
Connector J1 is the interface to the test system. The
device EMI shield should be connected to a good
ground in your final system.
The value of capacitor CX₁ is listed as 10 µF. This
value should be modified to meet your system electrical
noise requirements. The decision should be based on
the amount of system noise at the point where the IrDA
transceiver will be powered. Both time-domain and fre-
quency-domain noise issues should be considered.
One common source of noise is switching power sup-
plies, which need attention to both the power line and
ground return paths.
As shown in Figure 17, capacitor CX₁ is the only
external component needed with the transceiver. If the
power supply filtering in your system design is such
that no capacitor is needed, there is no absolute
requirement for it and that is a decision left to the
design engineer.
Note that the V_DD connection and V_LEDA connec-
tions are on separate pins. If V_DD and V_LEDA are to be
powered from the same source, pins 2 and 10 need to
be externally connected.
Evaluation boards may be requested through any
Sharp Microelectronics of the Americas Sales office.
GND
SD
J1
1+
3+
5+
7+
9+
+ ^{2 VCC}
+ ^{4 TxD}
+ ^{6 RxD}
+8
+ ¹⁰
2×5
GP2W0110YP
R₁ OPTION
R₂ 0 Ω
1 _NC
2 _NC
3
4
V_DD
GND
5 _SD
6 _RxD
7 _TxD
8 _LEDA
GND
+ _CX1
10 µF 6.3 V
Figure 17. Evaluation Board Schematic
GP2W0110YPS-14
IrDA Technical Information
13