www.semtech.com/products/ Page 22 ADVANCED COMMUNICATIONS & SENSING DATASHEET SX8723C ZoomingADC fo" />
參數(shù)資料
型號(hào): SX8723CWLTDT
廠商: Semtech
文件頁(yè)數(shù): 15/67頁(yè)
文件大小: 0K
描述: IC DAS ADC 16BIT I2C/SRL
標(biāo)準(zhǔn)包裝: 1
系列: ZoomingADC™
類型: 數(shù)據(jù)采集系統(tǒng)(DAS)
輸入類型: 差分
輸出類型: 數(shù)字
接口: I²C
安裝類型: 表面貼裝
封裝/外殼: 12-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 12-MLPD-EP(4x4)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: SX8723CWLTDTDKR
www.semtech.com/products/
Page 22
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8723C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
Similarly, the reference voltage is chosen among two differential channels (VREF = VBATT-VSS, VREF = VBG-VSS or VREF =
VREF,IN-VSS) as shown in Table 10. The selection bit is Vmux. The reference inputs VREFP and VREFN (common-mode) can
be up to the power supply range.
7.4 First Stage Programmable Gain Amplifier (PGA1)
The first stage can have a buffer function (unity gain) or provide a gain of 10 (see Table 11). The voltage VD1 at the
output of PGA1 is:
where GD1 is the gain of PGA1 (in V/V) controlled with the Pga1Gain bit.
00x01
AC3
AC2
01x01
AC2
AC3
00x10
AC5
AC4
01x10
AC4
AC5
00x11
N.C.
01x11
N.C.
10000
AC0(VSS)
11000
AC0(VSS)
10001
AC1(VREF)
11001
AC1(VREF)
10010
AC2
11010
AC2
10011
AC3
11011
AC3
10100
AC4
11100
AC4
10101
AC5
11101
AC5
10110
N.C.
11110
N.C.
10111
N.C.
11111
N.C.
Table 10. Analog reference Input Selection
Vmux
(RegACCfg5[0])
VREFP
VREFN
0VREF = VBATT
VSS
1
VREF = VBG or VREF,IN1
1.
External voltage reference on D1 GPIO pin. See section 6.3 on page 15 about
VSS
Equation 5
Table 11. PGA1 gain settings
Pga1Gain bit
(RegACCfg3[7])
PGA1 gain [V/V]
GD1 [V/V]
01
110
Table 9. Analog Input Selection
Amux
(RegACCfg5[5:1])
VINP
VINN
Amux
(RegACCfg5[5:1])
VINP
VINN
Sign S = 1
Sign S = -1
]
[
1
V
GD
V
IN
D
=
Not
for
New
Designs
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