Rainbow Electronics ATR0601 - Manual

Features
• Very Low Power Design (40 mW)
• Single IF Architecture
• Excellent Noise Performance
• 1.5-bit ADC On Chip
• Small QFN Package (4 mm
×
4 mm, 24 pins)
• Highly integrated, Few External Components
• Advanced BiCMOS Technology (UHF6s)
• Non ESD Sensitive Device
1. Description
The ATR0601 is a single IF GPS front-end IC, designed to meet the requirements of
mobile and automotive applications. Excellent RF performance combined with low
noise figure enables high quality GPS solutions and it's very low power consumption
fits perfectly to portable devices. Featuring a balanced XTO and a fully integrated bal-
anced frequency synthesizer, only few external components are required. The
ATR0601 offers a complete autonomous mode, utilizing the on chip AGC in closed
loop operation, to set the gain of the IF VGA. Alternatively, in combination with the
baseband processor ATR0621 the optimum gain of the IF VGA can be computed and
set by software, using the digital SDI interface.
Figure 1-1. Block Diagram
XTO
PMSS
Logic
D
A
VCO
PLL
D
A
BPI
T
EST
MO
GND
N
BPI
BP NB
P
VC
C
VC
C
VD
IG
PUXTO
PURF
RF
NRF
XTO
NXTO
X
NX
SDI
SL
SH
SC
AG
C
O
EG
C
1
GPS Front-end
IC
ATR0601
Preliminary
Rev. 4866A–GPS–08/05