參數(shù)資料
型號(hào)： SX8724E082TRT
廠商： Semtech
文件頁(yè)數(shù)： 33/53頁(yè)
文件大小： 0K
描述： IC DAS PRESSURE/TEMP SENS 16MLPQ
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： 16-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 16-MLPQ（4x4）
包裝： 標(biāo)準(zhǔn)包裝
配用： XE8000EV121-ND - BOARD EVAL FOR SX8723/24
其它名稱： SX8724E082DKR
ADVANCED COMMUNICATIONS & SENSING
V1.23 2009 Semtech Corp.
www.semtech.com
39
SX8724
ZoomingADC for Pressure and Temperature Sensing
Power Reduction
The ZoomingADC is particularly well suited for low-power applications. When very low power consumption is
of primary concern, such as in battery operated systems, several parameters can be used to reduce power
consumption as follows:
1.
Operate the acquisition chain with a reduced supply voltage VDD.
2.
Disable the PGAs which are not used during analog-to-digital conversion with ENABLE[3:0].
3.
Disable all PGAs and the ADC when the system is idle and no conversion is performed.
4.
Use lower bias currents in the PGAs and the ADC using the control words IB_AMP_PGA[1:0] and
IB_AMP_ADC[1:0].
5.
Reduce sampling frequency.
Finally, remember that power reduction is typically traded off with reduced linearity, larger noise and slower
maximum sampling speed.
Recommended Design for Other 2-WIRE Devices Connection
SX8724 does not support multiple devices on the same 2-WIRE bus. A separate 2-WIRE bus should be used to
address other devices as seen on the following schematic.
SX8724
AC2
AC3
AC4
AC5
AC6
AC7
D0 D1 D2 D3
VBATT
VPUMP
VSS
READY
SCL
SDA
uC
SCL1
SDA1
2-
WIRE
I2C
EEPROM
(or other
devices)
A0
A1
A2
GND
VCC
S
C
L
2
S
D
A
2
VCC
GND
Figure 22 - Recommended connections with other devices
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