User Guide

CCS Technical Documentation 7 - RF Description & Troubleshooting
Company Confidential RH-4
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VR1A
4.75 V 3.2 %
charge pump (VDDCP)
0.45 mA
85 mA
Tx modulator (VDDTX)
2.78 V 3 %
3.5 mA
2.78 V 3 %
VCXO (VDDXO)
BB buffer (VDDBBB)
14 mA (Tx900), 28 (Rx)
2.78 V 3 %
VR4
VR3
VR2
41 mA
PLL prescaler (VDDPRE)
2.78 V 3 %
VR5
PLL counters (VDDPLL)
dividers, LO buffers (VDDLO)
11 mA
Rx front end (VDDRXF)
2.78 V 3 %
VR6
Rx BB section (VDDRXBB)
14 mA
VCO
2.78 V 3 %
VR7
0.02 mA
13/26 MHz (SELADDR)
1.8 V 4.5 %
VIO
UEM
Triple band PA
VBAT
3.6 V
dig. interface (VDDDL)
100 uA
bias reference (VBEXT)
1.35 V 2 %
VREF01
Dig. control (VDDDIG)
Ant. switch control lines
(through Mjoelner)
Tx buffer (through Mjoelner)