參數(shù)資料
型號: XE8000EV120
廠商: Semtech
文件頁數(shù): 6/108頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR SX8722I070TRLF
標(biāo)準(zhǔn)包裝: 1
系列: ZoomingADC™
ADC 的數(shù)量: 1
位數(shù): 16
數(shù)據(jù)接口: I²C
工作溫度: -40°C ~ 125°C
已用 IC / 零件: SX8722
已供物品: 板,CD
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: SX8722I070LFDKR-ND - IC ZOOMING ADC 10BIT 16CH 44MLPQ
SX8722I070LFCT-ND - IC ZOOMING ADC 10BIT 16CH 44MLPQ
SX8722I070LFTR-ND - IC ZOOMING ADC 10BIT 16CH 44MLPQ
其它名稱: XM8000EV120
XM8000EV120-ND
ACS - Revision 4.2
October 2008
2008 Semtech Corp.
www.semtech.com
Page 103
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8722
High gain acquisition for sensor interface
In sleep mode the internal program is in "HALT" assembler equivalent mode. The SLEEP bit toggling in SXCtrl1 or a signal
on the SLEEP pin can wake up the SX8722.
See active mode section for more information.
15.4. Shutdown mode
15.4.1. Description
This is a very low-power mode because all circuit clocks and all peripherals are stopped. Only some service blocks remain
active.
15.4.2. Operating specifications in shutdown mode
Summary
ADC stopped
VLD stopped
If Xtal present, clock set to Xtal 32k
If Xtal not present, clock set to RC minimum value (~80kHz)
Bias current off
Program HALT, interrupt off
No possible I2C communication
Internal voltage multiplier
Like in sleep mode, internal voltage multiplier is automatically enabled when the power supply goes below 3 Volts but the
internal voltage multiplier requires an external capacitor between VMULT pin and Vss, the value of this capacitor must be
between 1 and 3nF.
Shutdown mode current consumption
The current consumption in shutdown mode is around 0.5 A if the supply voltage is above 3V. Below 3V, the current
consumption is around 3.5 A because the voltage multiplier is enabled.
How to set shutdown mode consumption around 0.5A
By default, with a supply voltage below 3V the shutdown mode current is around 3.5A. To obtain 0.5A consumption, the
shut command (I2C, pin) has to be received by the SX8722 when the internal voltage multiplier is not enabled. It means
when the supply voltage is above 3V.
Then, if the supply voltage is lowered under 3V, the SX8722 will conserve the 0.5A consumption.
15.4.3. How to set SX8722 in shutdown mode
I2C Shutdown command
Send the 0x50 command through the I2C interface.
I2C SHUT bit toggle
Through the I2C interface, send a write mask command at address 00 and toggle the SHUT bit of the SXCtrl1 register.
Not
Recommended
for
New
Designs
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