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TPS658621A датащи(PDF) 80 Page - Texas Instruments

номер детали TPS658621A
подробное описание детали  Advanced Power Management Unit
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TPS658621A
SLVSA58 – DECEMBER 2009
www.ti.com
A simplified block diagram for the ADC analog section is show in Figure 3-22.
Figure 3-22. Simplified ADC Block
3.62.1 ADC External Input Pins – Bias Current Settings
The external pins ANLG1, ANLG2 and ANLG3 may be biased using internal pull-up current sources, with
current source value set by register ADCANLG. The current sources are turned OFF when the ADC
reference is disabled.
Table 3-58. ADC Input Bias Selection
ADCANLG [Addr 0x60]
Default to 0
Bit Name
ANLG2FLT
ANLG3FLT
IANLG3[1]
IANLG3[0]
IANLG2[1]
IANLG2[0]
IANLG1[1]
IANLG1[0]
Function
SPARE
SPARE
ANLG3 BIAS CURRENT SOURCE
ANLG2 BIAS CURRENT SOURCE
ANLG1 BIAS CURRENT SOURCE
Table 3-59. ANLG3/2/1 Current Source Settings
IANLG[1]
IANLG[0]
Current (
μA)
0
0
0
0
1
3
1
0
10
1
1
50
The COMP pin has no internal pull-up current source.
3.62.2 ADC Timing Engine Overview
The ADC timing engine can be configured to perform either one reading, a single-trigger multiple set of
readings, or to operate continuously until high or low limits are violated on any channel.
A conversion cycle includes the following steps:
1. Program the timing engine mode (single sample, multiple sample, etc.) and triggers
2. Enable the internal ADC reference and conversion start delay
80
DETAILED DESCRIPTION
Copyright © 2009, Texas Instruments Incorporated
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