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Rabbit 6000 User’s Manual
digi.com
240
23. A
NALOG
/D
IGITAL
C
ONVERTER
23.1 Overview
The Rabbit 6000 has a 1 megasamples/s, 12-bit A/D converter with a separate 8-channel multiplexer avail-
able at all times. Each individual multiplexer channel can be read separately. Note that use of the multiplexer
reduces the effective accuracy to 11 bits.
The actual conversion rates depend on the clock sources used — each analog component can accept a
clock from an external I/O pin or divide the peripheral clock by a value between 2 and 256.
The Rabbit 6000 also has a 11-bit single-channel A/D converter, a 10-bit two-channel differential-input
A/D converter, and a 10-bit two-channel differential-output D/A converter for 802.11 Wi-Fi operation. The
Wi-Fi analog features are available for customer use when Wi-Fi is not being used; see Chapter 22 for
more information.
Table 23-1 lists the detailed features for the multiplexed A/D converter.
Table 23-1. Multiplexed A/D Converter Specifications
Analog Component
Feature
Specification
Dedicated A/D converter with
MUX
Resolution
12 bits
(accuracy is 11 if mux is used)
Max sample rate
Clock
1 megasample/sec
13MHz
A/D Input Range
0.07 V - 3.23 V
Mux Input Range
0V - 3.3V
Operating Current
Active
Power down
5 mA @ 3.3 V
5 µA @ 3.3 V
Nonlinearity
Differential (DNL)
Integral (INL)
±
0.8 LSB typ.
±
2 LSB typ.
Содержание 6000
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