20-101-0554 Rabbit Semiconductor, 20-101-0554 Datasheet - Page 31
![no-image](/images/no-image-200.jpg)
20-101-0554
Manufacturer Part Number
20-101-0554
Description
COMPUTER SNGL BD BL2000 BOTT MNT
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-0556.pdf
(94 pages)
Specifications of 20-101-0554
Module/board Type
Single Board Computer Module
For Use With/related Products
BL2000
Lead Free Status / RoHS Status
Vendor undefined / Vendor undefined
- Current page: 31 of 94
- Download datasheet (2Mb)
3.5 A/D Converter Inputs
The single 14-channel A/D converter used in the BL2000 has a resolution of 12 bits (models
BL2000 and BL2020) or 10 bits (models BL2010 and BL2030). Eleven of the 14 channels
are available externally, and three are used internally for the reference voltages: 4.096 V
(V
), 2.048 V (V
/2), and Analog Ground. These internal voltages can be used to check
ref
ref
the functioning of the A/D converter.
The A/D converter only measures voltages between 0 V and the applied reference voltage.
Therefore, each external input has circuitry that provides scaling and buffering. The first
four external inputs are scaled and buffered to provide the user with an input impedance of
1 MΩ and a range of -10.24 V to +10.24 V. The remaining five or seven inputs are not
buffered, but are scaled to provide inputs that can range from 0 V to +49 V.
Figure 17 shows the buffered A/D converter inputs.
W
W
Figure 17. Buffered A/D Converter Inputs
The op-amp is powered from the +V supply. The 1 MΩ and 200 kΩ resistors set the gain
(scale factor), which is 0.2 in this case. This results in a dynamic input range of 4.096 V ÷
0.2 or 20.48 V. The center point of this range is set by the 1.707 V reference voltage. With
the reference set to 1.707 V, the center point is at 0 V and the input voltage can range from
-10.24 V to +10.24 V. To maintain the best accuracy, the input range should be limited to
-10.0 V to +10.0 V.
The five or seven unbuffered inputs have an impedance of 12 kΩ and a scale factor of
0.0833, which provides for an input voltage range of 0 V to 49.15 V. Accuracy is main-
tained over the specified voltage range from 0 V to 48 V DC.
The analog inputs can also be used as digital inputs when required. In this case a lower
quality 10-bit D/A converter can be used, and the software would assign a 1 or 0 to a volt-
age based on whether it is above or below a particular threshold. See the
function
digIn
description for more information.
User’s Manual
27
Related parts for 20-101-0554
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![20-101-0575](/photos/6/75/67539/20-101-0575_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD BL2500 29.4MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0576](/photos/37/60/376010/bl2500_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD BL2500 29.4MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0412](/photos/37/60/376043/101-0412_tmb.jpg)
Part Number:
Description:
DISPLAY GRAPHIC 12KEY PROG OP670
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0411](/photos/37/60/376043/101-0412_tmb.jpg)
Part Number:
Description:
DISPLAY GRAPHIC 12KEY ETH OP6700
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0457](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2030
Manufacturer:
Rabbit Semiconductor
![20-101-0455](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BOARD ETH BL2010
Manufacturer:
Rabbit Semiconductor
![20-101-0497](/photos/37/60/376011/op6800_rgb_tmb.jpg)
Part Number:
Description:
MODULE OP6810 W/O ETH/MEM EXPANS
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0456](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2020
Manufacturer:
Rabbit Semiconductor
![20-101-0591](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER BL2010 W/FRICTION LOCK
Manufacturer:
Rabbit Semiconductor
![20-101-0594](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER BL2020 W/FRICTION LOCK
Manufacturer:
Rabbit Semiconductor
![20-101-0602](/photos/37/60/376010/bl2500_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD BL2500 44.2MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0430](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BOARD FULL BL2000
Manufacturer:
Rabbit Semiconductor
![20-101-0462](/photos/37/60/376013/bl2100_600_tmb.jpg)
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2110
Manufacturer:
Rabbit Semiconductor
![20-101-0891](/photos/37/60/376014/bl2600_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD 29.4MHZ BL2610
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0654](/photos/37/60/376011/op6800_rgb_tmb.jpg)
Part Number:
Description:
INTERFACE OP6800 512K FLASH&SRAM
Manufacturer:
Rabbit Semiconductor
Datasheet: