参数资料
型号: SX8723CWLTDT
厂商: Semtech
文件页数: 27/67页
文件大小: 0K
描述: IC DAS ADC 16BIT I2C/SRL
标准包装: 1
系列: ZoomingADC™
类型: 数据采集系统(DAS)
输入类型: 差分
输出类型: 数字
接口: I²C
安装类型: 表面贴装
封装/外壳: 12-WFDFN 裸露焊盘
供应商设备封装: 12-MLPD-EP(4x4)
包装: 标准包装
其它名称: SX8723CWLTDTDKR
www.semtech.com/products/
Page 33
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8723C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
In "continuous-time" mode, the input signal is repeatedly converted into digital. After a conversion is finished, a new
one is automatically initiated. The new value is then written in the result register, and the corresponding internal
trigger pulse is generated. This operation is sketched in Figure 17. The conversion time in this case is defined as TCONV.
In the "on-request" mode, the internal behavior of the converter is the same as in the "continuous-time" mode, but the
conversion is initiated on user request (with the Start bit). As shown in Figure 18, the conversion time is also TCONV.
7.7.8 Output Code Format
The ADC output code is a 16-bit word in two's complement format (see Table 19). For input voltages outside the range,
the output code is saturated to the closest full-scale value (i.e. 0x7FFF or 0x8000). For resolutions smaller than 16 bits,
the non-significant bits are forced to the values shown in Table 20. The output code, expressed in LSBs, corresponds to:
Recalling Equation 10, page 25, this can be rewritten as:
Figure 17. ADC “Continuous-Time” Operation
Figure 18. ADC “On-Request” Operation
Equation 18
Equation 19
Output code RegACOut[15:0]
Busy
Internal trig
Ready
Tconv
1/fs
Output code RegACOut[15:0]
Busy
Internal trig
Ready
Tconv
START Request
OSR
V
OUT
REF
ADC
IN
ADC
1
2
,
16
+
=
]
[
1
2
16
LSB
OSR
V
S
GDoff
GD
V
OUT
IN
REF
TOT
REF
IN
ADC
+
=
Not
for
Designs
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