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MSP430 bảng dữ liệu(PDF) 30 Page - Texas Instruments

tên linh kiện MSP430
Giải thích chi tiết về linh kiện  AFEx8101 16-Bit and 14-Bit, Low-Power DACs With Voltage Reference and Diagnostic ADC for 4-mA to 20-mA Loop-Powered Applications
PDF  88 Pages
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nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
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MSP430 bảng dữ liệu(HTML) 30 Page - Texas Instruments

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7.3.2 Analog-to-Digital Converter (ADC) Overview
The AFEx8101 feature a monitoring system centered on a 12-bit successive approximation register (SAR) ADC
and a highly flexible analog multiplexer. The monitoring system is capable of sensing up to two external inputs,
as well as several internal device signals.
The ADC uses the VREFIO pin voltage as a reference. The ADC timing signals are derived from an on-chip
oscillator. The conversion results are accessed through the device serial interface.
7.3.2.1 ADC Operation
The device ADC supports direct-mode and auto-mode conversions. Both conversion modes use a custom
channel sequencer to determine which of the input channels are converted by the ADC. The sequence order
is fixed. The user selects the start channel and stop channel of the conversion sequence. The conversion
method and channel sequence are specified in the ADC Configuration registers. The default conversion method
is auto-mode. Figure 7-8 shows the ADC conversion sequence.
START
Set ADC_CFG.BUF_PD = 0,
ADC_CFG.DIRECT_MODE = 0 or 1
TRIGGER.ADC =1?
Yes
No
Set ADC mux to
ADC_INDEX_CFG.
START
Convert ADC
ADC idle state
Increment ADC custom
channel sequencer
ADC_CFG.
DIRECT_MODE =1?
TRIGGER_ADC = 0?
Yes
No
No
No
Yes
ADC_INDEX.STOP
(last conversion
Completed)?
Yes
Figure 7-8. ADC Conversion Sequence
AFE78101, AFE88101
SLASF21 – DECEMBER 2022
www.ti.com
30
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Copyright © 2022 Texas Instruments Incorporated
Product Folder Links: AFE78101 AFE88101



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