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PDF ATR0601 Data sheet ( Hoja de datos )
| Número de pieza | ATR0601 | |
| Descripción | GPS FRONT-END IC | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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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
GPS Front-end
IC
ATR0601
Preliminary
PUXTO
PURF
PMSS
Logic
RF
NRF
XTO
NXTO
X
NX
VCO
PLL
XTO
1
A
D
A
D
SDI
SL
SH
SC
DataSheet4 U .com
Rev. 4866A–GPS–08/05
1 page  
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ATR0601 [Preliminary]
4. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Value
Unit
Analog supply voltage
Digital supply voltage
Input voltage
Operating temperature
Storage temperature
VCC
VDIG
Vin
Top
Tstg
–0.3 to +3.7
–0.3 to +3.7
–0.3 to +3.7
–40 to +85
–55 to +125
V
V
V
°C
°C
5. Thermal Resistance
Parameters
Junction ambient
Symbol
Rth
Value
125
Unit
K/W
6. Operating Range
Parameters
Analog supply voltage
Digital supply voltage
Supply voltage difference (V∆ = VCC – VDIG)
Temperature range
Input frequency
Reference frequency
Symbol
VCC
VDIG
V∆
Temp
fRF
fXTO
Value
2.70 to 3.30
1.65 to 2.00
≥ 0.80
–40 to +85
1575.42
23.104
Unit
V
V
V
°C
MHz
MHz
7. Electrical Characteristics
No. Parameters
Test Conditions
Pin Symbol Min.
Typ.
Max.
1 Common
1.1 Analog supply current(1) VPUxto = VPUrf = VPU,on
1.2 Digital supply current (1),(2) VPUxto = VPUrf = VPU,on
7, 19
1
IS
IDIG
1.3
Analog supply current in VPUxto = VPU,on,
XTO mode(1)
VPUrf = VPU,off
7, 19
IS_XTO
1.4
Digital supply current in
XTO mode(1),(3)
VPUxto = VPU,on,
VPUrf = VPU,off
1 IDIG_XTO
1.5
Supply current in power
down mode(1)
VPUxto = VPUrf = VPU,off 1, 7, 19
IPD
14.2
700
2.9
500
2
1.6 Maximum total gain
VAGCO = 2.2V
Gmax_tot
90
1.7 Noise figure (SSB)
NFtot
6.8
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes:
1. Conditions: VCC = 2.7V; VDIG = 1.65V; Temperature = 27°C
2. Capacitive load (CL = 3.3 pF) at pins 22, 23, 24
3. Capacitive load (CL = 3.3 pF) at pin 24
Unit
mA
µA
mA
µA
µA
dB
dB
Type*
A
A
A
A
A
B
C
4866A–GPS–08/05
DataSheet4 U .com
5
5 Page 
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ATR0601 [Preliminary]
Figure 9-5. Recommended IF-filter: Layout versus Schematic
13 14 15 16
Ca Cb
Lc Ld
Le Lf
B
13 14
15 16
Ca
Lc Ld
Cb
Le Lf
A VCC
Note:
Mutual inductance between the four inductors Lc - Lf plays an important role in the IF-filter charac-
teristics. In any design, the layout arrangement shown in Figure 9-5 on page 11 should be
resembled as close as possible. Measures: A = 2.8 mm; B = 1.4 mm; Lc - Lf: Wirewound SMD
inductors, 0603 size. (Please see Table 10-1).
Table 9-1.
Specification of GPS Crystals Appropriate for the Application Example Shown in
Figure 9-1 on page 9
Parameter
Comment
Min. Typ. Max. Units
Frequency Characteristics
Fundamental Frequency
Nominal frequency referenced to
25°C
23.104
MHz
Calibration tolerance
Frequency at 23°C ±2°C
7.0 ±ppm
Frequency deviation
Over operating temperature range
15.0 ±ppm
Temperature range
Operating temperature range
–40.0
+85.0 °C
Electrical
Load capacitance (CL)
18.5 19.5 pF
Equivalent Series Resistance (ESR)
Fundamental
Specification
7
12 23
Ω
Table 9-2.
Specification of GPS Crystals Appropriate for the Application Example Shown in
Figure 9-2 on page 9
Parameter
Comment
Min. Typ. Max. Units
Equivalent Series Resistance (ESR)
Fundamental
Specification
7 40 Ω
Note: All other parameters as specified in Table 9-1.
4866A–GPS–08/05
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