參數資料
| 型號： | SX8723CWLTDT |
| 廠商： | Semtech |
| 文件頁數： | 44/67頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS ADC 16BIT I2C/SRL |
| 標準包裝： | 1 |
| 系列： | ZoomingADC™ |
| 類型： | 數據采集系統(tǒng)（DAS） |
| 輸入類型： | 差分 |
| 輸出類型： | 數字 |
| 接口： | I²C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-WFDFN 裸露焊盤 |
| 供應商設備封裝： | 12-MLPD-EP（4x4） |
| 包裝： | 標準包裝 |
| 其它名稱： | SX8723CWLTDTDKR |
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www.semtech.com/products/
Page 49
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8723C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
show short voltage spikes at the frequency fs, but these will not influence the measurement. Whereas if the bandwidth
of the node is lower, no spikes will arise, but a small offset can be generated by the integration of the charges
generated by the switched capacitors, this corresponds to the mean impedance effect.
Notes:
(1)
One can increase the mean input impedance of the ZoomingADC by lowering the acquisition clock fs.
(2)
One can increase the mean input impedance of the ZoomingADC by decreasing the gain of the first enabled amplifier.
(3)
One can increase the effective input impedance of the ZoomingADC by having a source with a high electrical bandwidth (sensor electri-
cal bandwidth much higher than fs).
11.2 Frequency Response
The incremental ADC is an over-sampled converter with two main blocks: an analog modulator and a low-pass digital
filter. The main function of the digital filter is to remove the quantization noise introduced by the modulator. This filter
determines the frequency response of the transfer function between the output of the ADC and the analog input VIN.
Notice that the frequency axes are normalized to one elementary conversion period OSR / fs. The plots of Figure 28,
page 50 also show that the frequency response changes with the number of elementary conversions NELCONV
performed. In particular, notches appear for NELCONV >= 2 These notches occur at:
and are repeated every fs / OSR.
Information on the location of these notches is particularly useful when specific frequencies must be filtered out by the
acquisition system. This chip has no dedicated 50/60 Hz rejection filtering but some rejection can be achieved by using
For
Equation 27
Table 38. 50/60 Hz Line Rejection Examples
Rejection [Hz]
fNOTCH [Hz]
fs [kHz]
OSR [-]
NELCONV [-]
60
61
125
1024
2
61
250
1024
4
61
500
1024
8
50
53
62.5
1024
8
46
62.5
1024
4
46
125
1024
8
f
NOTCH
if
s
OSR N
ELCONV
-------------------------------------
=
i
12
… N
ELCONV
1
–
()
,,
=
Not
Recommended
for
New
Designs
相關PDF資料 |
PDF描述 |
|---|---|
| SX8723E083TDT | IC DAS PRESS/TEMP SENS 12MLPD |
| SX8724CWLTDT | IC DAS ADC 16BIT I2C/SRL |
| SX8724E082TDT | IC DAS PRESS/TEMP SENS 16MLPQ |
| SX8725CWLTDT | IC DAS ADC 16BIT I2C/SRL |
| SX8725E083TDT | IC DAS PRESS/TEMP SENS 12MLPD |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SX8723E083TDT | 功能描述:IC DAS PRESS/TEMP SENS 12MLPD RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:ZoomingADC™ 其它有關文件:Automotive Product Guide 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數字 輸出類型:數字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:20-TSSOP 包裝:管件 |
| SX8723E083TRT | 功能描述:IC DAS PRESSURE/TEMP SENS 12MLPD RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:ZoomingADC™ 其它有關文件:Automotive Product Guide 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數字 輸出類型:數字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:20-TSSOP 包裝:管件 |
| SX8723S | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ZoomingADC for sensing data acquisition |
| SX8723SWLTDT | 制造商:Semtech Corporation 功能描述:2 INPUTS ZOOMING ADC WITH SPI |
| SX8724 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ZoomingADC? for Pressure and Temperature Sensing |
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