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Mini57
Apr. 06, 2017
Page 467 of 475
Rev.1.00
MINI5
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6.18 Programmable Gain Amplifier (PGA)
6.18.1 Overview
The Mini57 series contains a programmable gain amplifier (PGA) which can be enabled through
the PGAEN bit. User can measure the outputs of the programmable gain amplifier as the
programmable gain amplifier output to the integrated A/D converter channel, where digital results
can be taken. Furthermore, user can adjust gain to 1, 2, 3, 5, 7, 9, 11, and 13.
Note:
The analog input port pins must be configured as input type before the PGA function is
enabled.
1.1.4
Features
Supports analog input voltage range: 0~ V
DD
.
Supports programmable gain: 1,2, 3,5,7,9.11,13
Supports PGA output as input of ADC and ACMP
1.1.5
Block Diagram
PGA_I
PGA_O (pin)
PGA_ADC(to ADC)
PGA_CMP(to ACMP)
PGA
SYS_PC.3_MFP=6
PGAOUTEN
PGAEN
GAIN= 111
Figure 6.18-1 OP Amplifier Block Diagram
1.1.6
Register Map
R
: read only,
W
: write only,
R/W
: both read and write
Register
Offset
R/W
Description
Reset Value
PGA Base Address:
PGA_BA = 0x400F_0000
PGA_CTL
0x00
R/W
Programmable Gain Amplifier Control Register
0x0000_0000
Содержание Mini57 Series
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