参数资料
型号: SX8723CWLTDT
厂商: Semtech
文件页数: 29/67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 35
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8723C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
The equivalent LSB size at the input of the PGA chain is:
Notice that the input voltage VIN,ADC of the ADC must satisfy the condition:
to remain within the ADC input range.
7.7.9 Power Saving Modes
During low-speed operation, the bias current in the PGAs and ADC can be programmed to save power using the
control words IbAmpPga[1:0] and IbAmpAdc[1:0] (see Table 21). If the system is idle, the PGAs and ADC can even be
disabled, thus, reducing power consumption to its minimum. This can considerably improve battery lifetime.
Equation 22
Equation 23
Table 21. ADC & PGA power saving modes and maximum sampling frequency
IbAmpAdc [1:0]
IbAmpPga [1:0]
ADC Bias Current
PGA Bias Current
Max. fs [kHz]
00
01
11
1/4 x IADC
1/2 x IADC
IADC
125
250
500
00
01
11
1/4 x IPGA
1/2 x IPGA
IPGA
125
250
500
]
/
[
1
2
1
V
OSR
GD
V
LSB
TOT
REF
n
+
=
1
)
(
2
1
,
+
OSR
V
REFN
REFP
ADC
IN
Not
Recommended
for
New
Designs
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