AC530 Fastrax, AC530 Datasheet - Page 14

• Manufacturer Part Number: AC530
• Description: GPS Development Tools Application Board for UC530
• Manufacturer: Fastrax

Specifications of AC530

• Rohs: yes
• Product: Application Boards
• Tool Is For Evaluation Of: UC530
• Frequency: 1.575 GHz
• Operating Supply Voltage: 3.3 V
• Interface Type: UART
• Description/function: Fastrax Application Board AC530 provides the UC530 connectivity to the Fastrax Evaluation Kit or to other evaluation purposes
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Current: 25 mA

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4.2
The Fastrax UC530 module requires two separate power supplies: VDD_B for non-volatile back up block
(RTC/Backup RAM) and the VDD for digital parts and I/O. VDD can be switched off when navigation is not needed
but if possible keep the backup supply VDD_B active all the time in order to keep the non-volatile RTC & RAM
active for fastest possible TTFF.
Main power supply VDD current varies according to the VDD level, to the processor load, to the number of
satellites is track and to the rate of satellite re-acquisition. Typical VDD peak current is 31 mA (typ.) during GPS
acquisition after power up and typical average 15 mA @ VDD 3.3 V over 24 h during good sky visibility. Note that
average current drain will also increase during following features:
The following picture shows average current and power drain variation vs. VDD supply voltage.
2012-05-03
UC530_Datasheet
Note (a): Pull Up/down resistor present only shortly after power up.
Legend:
Impedance, I=Input, O=Output, OD=Output Open Drain, P=Power, PU=Internal Pull Up resistor,
PD=Internal Pull Down resistor. Note that with Birectional I/O the firmware has control for input vs. output
I/O type depending on the firmware function.
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
Power supply
15 mA average (typ.) @1 Hz navigation, <12 signals in track, good sky visibility
+2 mA @ tracking at least 12 satellites and over (GPS and SBAS)
+4 mA @ during first 12.5 minutes after cold and warm start due to receiving broadcast almanac data
+2.5 mA @ 5 Hz navigation rate
+4 mA @ 10 Hz navigation rate
+1 mA @ Jammer Remover AIC usage
Signal
TX0
RX0
GND
TIMER
PPS
WAKEUP
GND
A=Analogue, B=Bidirectional, C=CMOS 2.8 V, C1V2=CMOS 1.2 V, G=Ground, HZ=High
I/O
Full
Power,
Stanby
C,B
C,B
G
C1V2,OD
C,B
P,O
G
type
I/O type
Backup
HZ
HZ
G
C1V2,OD
HZ
-
G
I/O
Reset
C,B
C,B
G
C1V2,OD
C,B
P,O
G
type
Signal description
UART Port0 TX data transmit (NMEA)
UART Port0 RX data receive (NMEA), PU. Can be
left unconnected when not used.
Ground
Power control output (open drain) used to
control external VDD switch. When not used
connect to Ground externally.
- PPS Time Mark output signal (default)
- GPIO7
2.8V power output for optional control of
external LNA bias switch, active high = LNA bias
on. Max load current drain 2 mA. Can be left
unconnected when not used.
Ground