xe8802 Semtech Corporation, xe8802 Datasheet - Page 20

• Manufacturer Part Number: xe8802
• Description: Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
• Manufacturer: Semtech Corporation

2.4.3
Figure 2-5. Supply configuration for ROM circuit operation by-passing the internal regulator.
Figure 2-6. Guaranteed speed as a function of supply voltage and for two temperature ranges when VREG=VBAT.
Important Note
Note that the acquisition chain will not operate if VBAT is below 2.4V. The internal reference voltage for the LCD
will not operate below 1.5V. If the internal reference is not used, the LCD voltage generator and the LCD driver will
operate down to 1.2V. The operation range of the different blocks is summarized in Figure 2-7.
© Semtech 2006
8
6
4
2
0
1
ROM circuit version with regulator off
1.5
85°C
supply voltage VBAT (V)
2
45°C
VBAT
VREG
XE8802 Sensing Machine Data Acquisition MCU
VSS
2.5
125°C
2-7
3
with ZoomingADC™ and LCD driver
3.5
1.2 – 3.3 V
www.semtech.com