SX1441EVK Semtech, SX1441EVK Datasheet - Page 14

• Manufacturer Part Number: SX1441EVK
• Description: KIT DEV FOR SX1441
• Manufacturer: Semtech
• Series: EasyBlue™r
• Type: Bluetoothr

Specifications of SX1441EVK

• For Use With/related Products: SX1441
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Contents: -
• Other names: SX1441DVK; SX1441DVK

Personal Area Network
3.3.4 Block Diagram
The main power supply is VDD_M. It powers the power management unit and some I/O pads. The power
management unit generates the VREGD and VREGA regulated voltages. VREGD is usually used to supply the
digital core, through the VDD_DIG pin, and external components such as a serial non-volatile memory and the
radio chip. VREGA is usually used to supply the internal analog blocks, through the pin VDD_ANA. It may also be
used to power an external microphone.
VDDIO is the power supply for the radio interface. If the radio chip is powered by VREGD, then VDDIO should be
connected to VREGD as well. VDDIO_DIG is the power supply for most of the digital pads. Depending on the
application, it may be connected to VREGD, VDD_M, or any other power supply which fulfills the specifications.
© Semtech 2006
VDD_ANA
VDDBAT
VDD_M
VDD_M
VDD_M
VDD_ANA
Iref
Eol
VDD_PA
Amplifier
analog
Power
core
VDD_M
Bandga
Vref
power_mngt controller
VDD_M
Figure 7 - Power management unit block diagram
VREF
VDD_M
14
VDD_M
vreg_ana
VDD_DIG
levelshifters
digital
core
vreg_dig
VDD DIG
SX1441 – Bluetooth® 1.2 SoC
VDD_DIG
VDD_DIG
VDDIO_DIG padring
VDDIO padring
VREGD
VREG_OFF
VREGA
VDDIO_DIG
VDDIO
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