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Table B-1 lists the electrical, mechanical, and environmental specifications for the
RCM3700 Prototyping Board.
Table B-1. RCM3700 Prototyping Board Specifications
Parameter
Board Size
Operating Temperature
Humidity
Input Voltage
Maximum Current Draw
(including user-added circuits)
A/D Converter
IrDA Transceiver
Prototyping Area
Standoffs/Spacers
B.1.3 Power Supply
The RCM3700 requires a regulated 4.75 V to 5.25 V DC power source to operate.
Depending on the amount of current required by the application, different regulators can
be used to supply this voltage.
The RCM3700 Prototyping Board has an onboard +5 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 RCM3700 Prototyping Board.
The RCM3700 Prototyping Board itself is protected against reverse polarity by a Shottky
diode at D2 as shown in Figure B-3.
J4
1
D2
DCIN
2
3
1N5819
C19
47 µF
Figure B-3. RCM3700 Prototyping Board Power Supply
RabbitCore RCM3700 User's Manual
4.50" × 6.50" × 0.75" (114 mm × 165 mm × 19 mm)
–20°C to +60°C
5% to 95%, noncondensing
7.5 V to 30 V DC
800 mA max. for +3.3 V supply,
1 A total +3.3 V and +5 V combined
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
• A/D conversion time (including 120 µs raw count and
Dynamic C) 180 µs
HSDL-3602, link distances up to 1.5 m
2.5" × 3" (64 mm × 76 mm) throughhole, 0.1" spacing,
additional space for SMT components
5, accept 4-40 × 1/2 screws
SWITCHING POWER REGULATOR
U2
LM2575
D1
1N5819
Specification
LINEAR POWER
REGULATOR
+5 V
LM1117
3
10 µF
330 µF
330 µH
L1
+3.3 V
U1
2
1
10 µF
95
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