20-101-0525 Rabbit Semiconductor, 20-101-0525 Datasheet - Page 37

• Manufacturer Part Number: 20-101-0525
• Description: COMPUTER SINGLE-BOARD LP3500 FOX
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0525

• Module/board Type: Single Board Computer Module
• Product: Modules
• Processor Type: Rabbit 3000
• Sram: 512 KB
• Flash: 512 KB
• Timers: 8 bit, 10 bit
• Number Of I/os: 26
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 3 V to 30 V
• Board Size: 93 mm x 66 mm x 11 mm
• Description/function: Computer Module
• For Use With/related Products: LP3500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1115

3.6 A/D Converter Inputs (LP3500 only)
The single 8-channel A/D converter chip used in the LP3500 (the LP3510 does not have
analog capabilities) has a resolution of 12 bits for differential measurements or 11 bits for
single-ended measurements. Four of the channels can be jumpered individually for 4–20 mA
using jumpers across pins on header J3, and all 8 channels can be used over several
software-scaled voltage ranges.
The A/D converter chip has an internal amplifier that works with the resistor divider net-
work on the analog inputs as shown in Figure 16.
The A/D converter chip can be programmed in software to operate over the voltage ranges
shown in Table 6.
User’s Manual
Figure 16. Buffered A/D Converter Inputs
Gain Code
Table 6. A/D Converter Input Ranges
0
1
2
3
4
5
6
7
Multiplier
10
16
20
1
2
4
5
8
W
W
0–1.25 V
Voltage
0–2.5 V
Range
0–20 V
0–10 V
0–5 V
0–4 V
0–2 V
0–1 V
W
31