XE8805 SEMTECH [Semtech Corporation], XE8805 Datasheet - Page 14

• Manufacturer Part Number: XE8805
• Description: Data Acquisition MCU
• Manufacturer: SEMTECH [Semtech Corporation]

Figure 2-2. Supply voltage connections for low power operation of the ROM version.
2.3.2.2
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
3.3V.
Figure 2-3. Supply voltage connections for high speed operation of the ROM version.
© Semtech 2006
High speed operation
TM
will not run below 2.4V (see Figure 2-4). In this configuration, the circuit can not be used above
VMULT
VMULT
VBAT
VREG
VBAT
VREG
VSS
VSS
C
C
vmult
vmult
C
vreg
2-4
2.4V – 5.5V
2.15V – 3.3V
XE8805/05A
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