![](http://datasheet.mmic.net.cn/Semtech/XE8805AMI028LF_datasheet_100002/XE8805AMI028LF_14.png)
Semtech 2006
www.semtech.com
2-4
XE8805/05A
VBAT
VREG
VMULT
VSS
2.4V – 5.5V
Cvreg
Cvmult
Figure 2-2. Supply voltage connections for low power operation of the ROM version.
2.3.2.2
High speed operation
In this case, the internal voltage regulator is not used. The operation speed of the circuit can be increased with
increasing supply voltage but the supply current will also increase. The capacitor on VMULT has to be connected
only when VBAT<3V. In this case, the supply voltage can decrease down to 2.15V. Beware however that the
zoomingADC
TM will not run below 2.4V (see Figure 2-4). In this configuration, the circuit can not be used above
3.3V.
VBAT
VREG
VMULT
VSS
2.15V – 3.3V
Cvmult
Figure 2-3. Supply voltage connections for high speed operation of the ROM version.
Not
Recommended
for
New
Designs