参数资料
型号: SX8725CWLTDT
元件分类: ADC
英文描述: 2-CH 16-BIT PROPRIETARY METHOD ADC, SERIAL/PARALLEL ACCESS, PDSO12
封装: 4 X 4 MM, HALOGEN FREE AND ROHS COMPLIANT, MLPD-12
文件页数: 41/68页
文件大小: 1718K
代理商: SX8725CWLTDT
www.semtech.com/products/
Page 46
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8725C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
10.2.4 Mode Registers
(1)
The chop control is to allow chopping of the internal bandgap reference. This may be useful to help eliminate bandgap related internal
offset voltage and 1/f noise. The bandgap chop state may be forced High or Low, or may be set to toggle during conversion at either the
same rate or half the rate of the Elementary Conversion. (See Conversion Sequence in the ZoomingADC description).
(2)
The internal charge pump may be forced On when VBATT supply is below 4.2V or Off when VBATT supply is above 4.2V. Enabling the charge
pump increase the current consumption. If the ADC is not being run at full rate or full accuracy then it may operate sufficiently well when
VBATT is less than 4.2V and internal charge pump forced Off.
Table 36.
RegMode[0x70]
Bit
Name
Mode
Reset
Description
7-
r
1
reserved
6-
r
0
reserved
5:4
Chopper
rw
00
VREF chopping control. Note 1
11 : Chop at NELCONV/2 rate
10 : Chop at NELCONV rate
01 : Chop state=1
00 : Chop state=0
3
MultForceOn
rw
0
Force charge pump On. Takes priority. Note 2
2
MultForceOff
rw
1
Force charge pump Off. Note 2
1VrefD0Out
rw
0
Enable VREF output on D0 pin
0
VrefD1In
rw
0
Enable external VREF on D1 pin
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