User Guide

PAMS
Technical Documentation
RAE-3
3. RF+System Module BL8
Page 3 – 41
issue 1 06/01
DC characteristics
Regulators
Transceiver includes a multi function power management IC (CCONT), which
contains among other functions also 7 pcs of 2.8 V regulators. All regulators
can be controlled individually with 2.8 V logic directly or through control register.
The regulator IC is located in the system block of the transceiver.
Use of the regulators is illustrated in the power distribution diagram Figure 12.
VREF_2 from CCONT IC and RXREF from COBBA IC are used as the refer-
ence voltages for HAGAR RF–IC, VREF_2 (1.5V) for bias reference and
RXREF (1.2V) for RX ADC’s reference.
Control signals
This table shows used control signals for different functions and the typical cur-
rent consumption (VBATT = 3.7 V). All regulators except VXO are switched on
and off using the SYNTPWR control signals. The TX and RX blocks are
switched on and off under HAGAR control. These controls are accessed via se-
rial interface from MADLinda to HAGAR.
Table 13. Control signals and current consumptions (Measurements fo curremts)
VCXOPWR SYNTHPWR TXP
Typical current
consumption
Notes
H H L 22 mA Synthesizers
H H L 116 mA RX active
H H L 171 mA TX active except PA
H H H 1092 mA TX active, PL5 to 50 ohm
All regulators which are connected to HAGAR are enabled simultaneously by
SYNTHPWR. In different modes the loads are switched on and off using HA-
GAR’s serial bus.
All control signals are coming from MADLinda and they are 2.8 V logic signals.
List of the needed supply voltages:
Table 14. Supply voltages
Voltage source Supply name Load
VR1 VXO VCTCXO, Hagar (VDIGI)
VR2 VRX HAGAR (VRF_RX, VF_RX)
VR3 VSYN_2 HAGAR (VLO, VPRE)
VR4 VSYN_1 HAGAR (VBB), LNA’s
VR5 VTX HAGAR (TX modulator)
VR6 COBBA