Document
GP2015
GPS Receiver RF Front End
Supersedes edition in August 1996 Global Positioning Products Handbook, HB4305-1.0 DS4374 - 2.4 October 1996
The GP2015 is a small format RF Front-end for Global Positioning System (GPS) receivers. Equivalent in performance to the GP2010 but in a TQFP package, this product is suited for size-critical applications as the RF area can be reduced by a factor of two to three using miniature surface mount passive components The GP2015 is designed to operate from either 3 or 5 Volt supplies. The input to the device is the L1 (1575.42MHz) CoarseAcquisition (C/A) code Global Positioning signal from an antenna (via a low-noise pre-amplifier). The output is 2-bit quantised for subsequent signal processing in the digital domain. The GP2015 contains an on-chip synthesiser, mixers, AGC and a quantiser which provides Sign and Magnitude digital outputs. A minimum of external components is required to make a complete GPS front-end. The device has been designed to operate with the GP2021 12-channel Global Positioning Correlator, and DW9255 SAW filter, both also available from Mitel Semiconductor. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
36 35 34 33 32 31 30 29 28 27 26 25
37 38 39 40 41 42 43 44 45 46 47 48
24 23 22 21 20
GP2015
19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
FP48 Name
Name IF Output PLL Filter 1 PLL Filter 2 VEE (OSC) VCC (OSC) VEE (OSC) VEE (REG) PRef PReset VEE (IO) CLK N/C N/C MAG SIGN OPCIKOPCIK+ VDD (IO) PDN TEST LD VEE (DIG) AGC AGC +
Pin 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
FEATURES
s Ultra miniature TQFP package s Low Voltage Operation (3V - 5V) s Low Power - 200mW typ. (3V supply) s C/A Code Compatible s On-chip PLL Including Complete VCO s Triple Conversion Receiver s 48-Lead Surface Mount Quad Flat-Pack Package s Sign and Magnitude Digital Outputs s Compatible with GP2021 CMOS Correlator
APPLICATIONS
s C/A Code Global Positioning by Satellite Receivers s Time Standards s Navigation s Surveying
ORDERING INFORMATION
The GP2015 is available in 48 pin TQFP package to Industrial (-40°C to +85°C) grade.
N/C VCC (DIG) REF 2 REF 1 VCC (RF) VEE (RF) VEE (RF) RF Input VEE (RF) VEE (RF) VCC (RF) N/C O/P 1O/P 1+ VCC (2) I/P 2I/P 2+ VEE (IF) VEE (IF) O/P 2O/P 2+ VCC (3) I/P 3I/P 3+
Fig. 1 Pin connections - top view
RELATED PRODUCTS AND PUBLICATIONS
Part
DW9255 GP2021 GP2010 GP2015 GPSBuilder-2
Description
Data Reference
DS3861 DS4057 DS4056 AN4533 DS4004 DS4537
ORDERING CODE
GP2015 IG FP1R Industrial - Plastic 48-pin TQFP
35.42MHz SAW Filter Twelve-Channel Correlator GPS receiver RF Front-end Design with the GP2015 Twelve-Channel GPS receiver development system GPSBuilder-2.1 Twelve-Channel GPS development system
GP2015
ABSOLUTE MAXIMUM RATINGS (Non-simultaneous)
Max. Supply Voltage 7V Max. RF Input +15dBm Max. voltage on any pin VCC/VDD + 0.5V except LD (pin 21) and PReset (pin 9), which are 5.5V Min. voltage on any pin VEE - 0.5V Sto.