STB5610 STMicroelectronics, STB5610 Datasheet - Page 4

• Manufacturer Part Number: STB5610
• Description: RF Wireless Misc GPS Front-End
• Manufacturer: STMicroelectronics
• Type: RF IC'sr

Specifications of STB5610

• Supply Current: 37 mA
• Operating Temperature Range: - 40 C to + 125 C
• Package / Case: LQFP-48
• Mounting Style: SMD/SMT
• Power Gain Typ: 19 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Block diagram and functional description
1.2.5
1.2.6
1.2.7
1.2.8
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Power supplies
The STB5610, has been designed to support from 2.7 V to 3.6 V supply voltage.
VCO and PLL
Using external tank the VCO is able to provide very low phase noise signal. Through the
frequency selector pin the VCO signal is set at 1554.96 MHz and at 1571.328 MHz. The on-
chip reference oscillator uses a low cost 16.368 MHz crystal.
Antenna sensor circuitry
Integrated sensor circuitry is able to evaluate the antenna current consumption; the Asout
pin output provides this info externally. Using external sensing resistor of 10 Ohm if the
antenna current consumption is inside the range 10 mA to 40 mA (active antennas typical
current consumption) the Asout output logic level is High, if the antenna current
consumption is outside the above reported range (passive antenna or problem on antenna
connection) the Asout output logic level is low.
Chip enable
Using the CE pin it is possible to switch off all the chip (neither data nor clock available).
Using CE2 pin it is possible to disable the analog portion of the chip (no data available)
maintaining the digital portion active (Clock available) optimizing the chip current
consumption.
STB5610