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72 RabbitCore RCM3600
Table B-1 lists the electrical, mechanical, and environmental specifications for the Proto-
typing Board.
B.3 Power Supply
The RCM3600 requires a regulated 4.0 V to 12.6 V DC power source to operate. Depend-
ing on the amount of current required by the application, different regulators can be used
to supply this voltage.
The Prototyping Board has an o5 V switching power regulator from which a
+3.3 V linear regulator draws its supply. Thus both +5 V and +3.3 V are available on the
Prototyping Board.
The Prototyping Board itself is protected against reverse polarity by a Shottky diode at D2
as shown in Figure B-3.
Figure B-3. Prototyping Board Power Supply
Table B-1. Prototyping Board Specifications
Parameter Specification
Board Size 4.50" x 6.50" x 0.75" (114 mm x 165 mm x 19 mm)
Operating Temperature –20°C to +60°C
Humidity 5% to 95%, noncondensing
Input Voltage 7.5 V to 30 V DC
Maximum Current Draw
(including user-added circuits) 800 mA max. for +3.3 V supply,
1 A total +3.3 V and +5 V combined
A/D Converter
8-channel ADS7870 with programmable gain configurable for
11-bit single-ended, 12-bit differential, and 4–20 mA inputs
• Input impedance 6–7 M
Ω
• A/D conversion time (including 120 µs raw count and
Dynamic C) 180 µs
IrDA Transceiver HSDL-3602, link distances up to 1.5 m
Prototyping Area
2.5" x 3" (64 mm x 76 mm) throughhole, 0.1" spacing,
additional space for SMT components
Standoffs/Spacers 5, accept 4-40 x 1/2 screws
LINEAR POWER
REGULATOR
POWER
IN
J4
10 µF
LM1117
U1
+3.3 V
3
1
2
1
2
3
1N5819
D2
47 µF
330 µF
+5 V
L1
C19
330 µH
D1
1N5819
SWITCHING POWER REGULATOR
DCIN
U2
LM2575
10 µF