uaa1570hl NXP Semiconductors, uaa1570hl Datasheet - Page 3

• Manufacturer Part Number: uaa1570hl
• Description: Global Positioning System Gps Front-end Receiver Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1
3
1999 May 10
UAA1570HL
Complete single-chip programmable
double-superheterodyne C/A-code GPS receiver
Programmable high IF frequencies supporting
wideband/P-code GPS and Global Navigation Satellite
System (GLONASS) applications
Supports frequency plans with a 2nd IF of
4
48-pin LQFP package
2.7 V minimum supply voltage
Low DC power consumption [57 mA typical with both
Low-Noise Amplifiers (LNAs) active]
Power-down mode (<900 A)
Typical receiver noise figure at 1.57542 GHz: 4.5 dB
Typical phase noise 72 dBc/Hz at 10 kHz offset
Simple microstrip LNA1/2 and first mixer matching
Single pin VCO with external varactor and resonator
Digital Phase Locked Loop (DPLL) synthesizer with
programmable VCO, 2nd Local Oscillator (LO) and
reference dividers
3-bit synthesizer and power-down control input
Reference and independent sample clock input with
internal squaring
1-bit amplitude quantized and time sampled TTL/CMOS
compatible output driver
High active gain supporting SAW filter applications
Configurable for external first LNA applications.
Global Positioning System (GPS) front-end
receiver circuit
NUMBER
40 to +85 C operating temperature range
FEATURES
ORDERING INFORMATION
TYPE
f
0
(1.023 MHz) = 4.092 MHz
LQFP48
NAME
plastic low profile quad flat package; 48 leads; body 7
3
DESCRIPTION
2
The UAA1570HL is a complete single-chip
double-superheterodyne receiver front-end intended for
GPS and GLONASS navigation systems. The IC includes
a programmable on-chip DPLL synthesizer, VCO with
external varactor and resonator, a 1-bit amplitude
quantizer and a time sampled TTL/CMOS compatible
SIGN output bit driver. It can be used with either an active
or passive antenna system by disabling or enabling the
on-chip LNAs and is ideally suited for low power GPS
receiver applications because of its 3 V supply and the
power management features through control pins.
Programmable prescaler controls provide the flexibility of
using different frequency schemes.
The UAA1570HL is optimized to provide SIGN bit data to
the companion Philips part, the SAA1575HL baseband
digital signal processor. The SAA1575HL can provide the
sample clock input to the UAA1570HL by dividing a
TTL/CMOS level reference clock signal down to a
programmable sampling clock output frequency. Both ICs
can also be used independently.
The UAA1570HL is supplied in a low profile, 48-pin LQFP
package for excellent Radio Frequency (RF) performance
and small size.
PACKAGE
GENERAL DESCRIPTION
7
1.4 mm
UAA1570HL
Product specification
SOT313-2
VERSION