This is information on a product in full production. For further information contact your local STMicroelectronics sales
office.
September 2013 Doc ID 16055 Rev 4 1/8
8
STA5630
Low power GPS RF front-end
Data brief production data
Features
■Integrated LNA
■Low power consumption (< 25 mW)
■1.8 V supply voltage
■GPS and Galileo compliant
■Minimum external components
■Serial interface
■3 bits A/D converter
■CMOS 65 nm technology
■Standard QFN-32 package
■Ambient temperature range: -40 °C to +85 °C
Description
The STA5630 is a fully integrated RF front-end
able to down-convert either the GPS L1 signal
from 1575.42 MHz to 4.092 MHz.
The STA5630 embeds high performance LNA
minimizing external component count. The chip
uses state of the art CMOS 65 nm technology.
A 3-bit ADC converts the IF signal to Sign (SIGN)
and Magnitude (MAG0 and MAG1). The
magnitude bits are internally integrated in order to
control the variable gain amplifiers. The VGA gain
can be also set by the SPI interface.
The STA5630 accepts a range of reference clocks
(10 to 52 MHz) and generates a 16.368 MHz
sampling clock (GPS_CLK) for the baseband. The
STA5630 embeds LDO to supply the internal core
of the device facilitating requirements to external
power supply.
High performance, low power, and cost effective
device, the STA5630 is the ideal solution for
automotive, cellular and consumer battery
powered applications.
VFQFPN32
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Table 1. Device summary
Order code Marking Package Packing
STA5630TR STA5630 VFQFPN32 Tape and reel
STA5630ATR (1)
1. Automotive Grade.
STA5630A VFQFPN32 Tape and reel
www.st.com
Contents STA5630
2/8 Doc ID 16055 Rev 4
Contents
1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
STA5630 Applications
Doc ID 16055 Rev 4 3/8
1 Applications
Three main applications cases are considered and described hereafter.
The first uses a passive antenna and only a single RF SAW in front of the internal LNA. It
targets low cost and medium performance applications. In this case LNA is ON and RFA
could be set at minimum gain if heavy blocker signals are present.
The second uses a passive antenna and two RF SAWs. It maximizes the performances in
presence of severe blockers. In this case LNA is ON and RFA is set at maximum gain.
The third case uses an active antenna. This solution targets applications where the GPS
antenna is far from the RF front-end. In this case the signal can be fed into either LNA or
RFA input depending on the application conditions.
STA5630 is suitable for baseband requiring 16.368/4.092 clock/RF interface and one, two or
three bits samples. It accepts reference clocks (TCXO) in the range of 10-52 MHz and
delivers a TCXO buffered copy to the baseband.
The STA5630 has two default modes selectable by an external pin (MODE):
●MODE 0: the chip is configured to use 16.368 MHz as reference frequency,
●MODE 1: the chip is configured to use 26 MHz as reference frequency.
Other modes are programmed through the serial interface
1.1 Block diagram
Figure 1. Block diagram
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Pin description STA5630
4/8 Doc ID 16055 Rev 4
2 Pin description
Table 2. Pin list description
Pin # Pin name Description Type
1 TP_IF_P RF/IF receiver chain test positive output Analog output
2 V12_RFA RF amplifier (RFA) power supply (1.2V) Supply pin
3 RFA_IN RFA input, DC coupled Analog input
4 V12_IF IF section power supply (1.2V) Supply pin
5 V12_OUT LDO IF/DIG output. Power supply (1.2V) delivered for
IF/ADC/DIG_TCXO/VCO/VDD_IO VCC Output
6 V12_RF_OUT LDO RF output: Power supply (1.2V) delivered for
LNA/RFA/MIXER VCC Output
7 V18_IN LDOs power supply (1.8V) Supply pin
8 V12_LNA Low noise amplifier (LNA) power supply (1.2V) Supply pin
9 LNA_OUT LNA output Analog output
10 GND Ground Ground
11 LNA_IN LNA input, DC coupled Analog input
12 GND Ground Ground
13 CHIP_EN Chip Enable Digital input
14 MODE Power-On Default Configuration Selector Digital input
15 V18_IO I/Os power supply (1.8V) Supply pin
16 GPS_CLK GPS clock (16.368MHz) Digital output
17 MAG0 Mag0 data (Last significant bit) Digital output
18 MAG1 Mag1 data Digital output
19 SIGN Sign data (most significant bit) Digital output
20 SPI_CLK Serial Parallel Interface Clock Digital input
21 SPI_NCS Serial Parallel Interface Chip Select (Active Low - 1.8V
domain) Digital input
22 SPI_DI Serial Parallel Interface Data Input Digital input
23 SPI_DO Serial Parallel Interface Data Output Digital output
24 TCXO_CLK TCXO Buffered Output Digital output
25 V12_IO Power supply for I/Os digital section (1.2V) Supply pin
26 GND_IO I/Os Ground Ground
27 TCXO_IN TCXO Input, DC coupled Analog input
28 V12_DIG Digital section and TCXO buffer input power supply (1.2V) Supply pin
29 V12_VCO VCO power supply (1.2V) Supply pin
30 V12_ADC ADC section power supply (1.2V) Supply pin
31 V12_MIX Mixer power supply (1.2V) Supply pin
32 TP_IF_N RF/IF receiver chain test negative output Analog output
EP GND Ground Ground
STA5630 Pin description
Doc ID 16055 Rev 4 5/8
Figure 2. Pin connection diagram (bottom view)
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Package information STA5630
6/8 Doc ID 16055 Rev 4
3 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 3. VFQFPN32 (5x5x1.0 mm) mechanical data and package dimensions
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STA5630 Revision history
Doc ID 16055 Rev 4 7/8
4 Revision history
Table 3. Document revision history
Date Revision Changes
22-Jul-2009 1 Initial release.
03-Mar-2010 2
Updated: Features on page 1;
Updated: Figure 1: Block diagram on page 3;
Updated: Section 2: Pin description on page 4.
27-Jun-2012 3 Updated: Features on page 1 and Table 1: Device summary on
page 1.
17-Sep-2013 4 Updated Disclaimer
STA5630
8/8 Doc ID 16055 Rev 4
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