20-101-1258 Rabbit Semiconductor, 20-101-1258 Datasheet - Page 29
![COMPUTER SINGLE-BOARD BL4S160](/photos/6/75/67535/20-101-1258_sml.jpg)
20-101-1258
Manufacturer Part Number
20-101-1258
Description
COMPUTER SINGLE-BOARD BL4S160
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-1258.pdf
(144 pages)
Specifications of 20-101-1258
Module/board Type
Single Board Computer Module
Product
Modules
Processor Type
Rabbit 4000
Sram
1 MB
Flash
2 MB
Timers
8 bit, 10 bit
Number Of I/os
20
Backup Battery
3 V Lithium Coin Type
Operating Voltage
9 V to 36 V
Board Size
96 mm x 146 mm x 16 mm
Description/function
Computer Module
For Use With/related Products
BL4S160
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1171
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3.4 A/D Converter Inputs
The single A/D converter chip used in the BL4S100 has a resolution of 12 bits (11 bits for
the value and one bit for the polarity). The A/D converter chip has a programmable-gain
amplifier. Each external input has circuitry that provides scaling and filtering. All 8 external
inputs are scaled and filtered to provide the user with an input impedance of 1 M and a
variety of single-ended unipolar, and differential bipolar ranges as shown in Table 6.
Figure 11 shows a pair of A/D converter input circuits. The resistors form an approx. 10:1
attenuator, and the capacitors filter noise pulses from the A/D converter inputs.
The A/D converter chip can only accept positive voltages. By pairing the analog inputs,
differential bipolar measurements are possible, and can be configured for each channel pair
with the
voltage ranges are listed in Table 6.
BL4S100 User’s Manual
opmode
parameter in the
Figure 11. Buffered A/D Converter Inputs
anaInConfig()
W
W
software function call. The available
W
W
27
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