MAX2741
Integrated L1-Band GPS Receiver
10 ______________________________________________________________________________________
28 27 26 25 24 23 22
V
CC
6
IFOUT+
IFOUT-
IFIN+
IFIN-
N.C.
N.C.
891011 12 13 14
FILT
SCLK
CS
SDI
SHDN
XTAL
REFCLK
15
16
17
18
19
20
21
GPSCLK
GPSIF2
GPSIF1
GPSIF0
V
CC
5
N.C.
SDO
7
6
5
4
3
2
1
GND
V
CC
4
V
CC
3
V
CC
2
RFIN
N.C.
V
CC
1
MAX2741
SDO
SD1
CS
SCLK
GPSIF0
GPSIF1
GPSIF2
GPSCLK
REFCLK
BASEBAND IC
RF
I/O CONNECTION RECEIVER RF BPF
RFIN LNA Input RF BPF Output
IF
I/O CONNECTION RECEIVER IF FILTER
IFOUT+ 1st IF Output from Mixer (+) IF BPF Input, 2.5k Differential
IFOUT- 1st IF Output from Mixer (-) IF BPF Input, 2.5k Differential
IFIN+ 1st IF Input (+) IF BPF Input, 2.5k Differential
IFIN- 1st IF Input (-) IF BPF Input, 2.5k Differential
BASEBAND
I/O CONNECTION RECEIVER BB IC/MAC
SCLK CMOS Input CMOS Output
CS CMOS Input CMOS Output
SDI CMOS Input CMOS Output
SDO CMOS Output CMOS Input
SHDN CMOS Input CMOS Output
GPSCLK CMOS Output CMOS Input
GPSIF0 CMOS Output CMOS Input
GPSIF1 CMOS Output CMOS Input
GPSIF2 CMOS Output CMOS Input
SYNTHESIZER
I/O CONNECTION RECEIVER EXTERNAL COMPONENTS
FILT
PLL Phase-Detector Charge-Pump
PLL Loop Filter
XTAL Crystal Oscillator Feedback Feedback Capacitors
REFCLK External TCXO or Crystal Analog (also connected to REFCLK input to MAC)
Typical Interface Diagram
Interface Summary
All I/O connections are DC-coupled. Supply voltages as specified in the electrical specifications.
MAX2741
Integrated L1-Band GPS Receiver
______________________________________________________________________________________ 11
Digital Test Bus
The digital test bus (DTB) is provided to allow for easy
bench analysis of the digital workings of the receiver.
Typical Application Circuit
V
CC
6
IFOUT+
IFOUT-
IFIN+
IFIN-
N.C.
N.C.
FILT
SCLK
CS
SDI
SHDN
XTAL
REFCLK
GPSCLK
GPSIF2
GPSIF1
GPSIF0
V
CC
5
N.C.
SDO
GND
V
CC
4
V
CC
3
V
CC
2
RFIN
N.C.
V
CC
1
V
CC
GPS RF INPUT
FROM GPS BPF
V
CC
V
CC
V
CC
2.2pF
100pF
22pF
100pF 22pF
V
CC
1nF100pF
220pF
100nF
100pF
1nF
100pF
6.2nH
SPI DATA OUT
TO BASEBAND PROCESSOR
GPS DATA AND CLOCK
TO BASEBAND PROCESSOR
22nF
36k
100pF
H/W SHUTDOWN LINE
FROM BASEBAND PROCESSOR
SPI CLOCK AND DATA INTO
BASEBAND PROCESSOR
SYSTEM TCXO
(2MHz TO 26MHz)
V
CC
100pF 22pF
39pF 470µH 470µH 39pF
680pF 5.6pF 680pF
680pF 5.6pF 680pF
100pF
28 27 26 25 24 23 22
891011 12 13 14
15
16
17
18
19
20
21
7
6
5
4
3
2
1
VCO
3225.6MHz
Σ
LNA
1612.8MHz
33.6MHz
16.8MHz
200kHz
90 0
/96
/192
/2
/16128
P.D.
/R
REF
OSC
ADC
SPI INTERFACE
MAX2741
MUX
Table 9. Digital Test-Mode-Select Description
DIGITAL OUTPUT FUNCTION
MODE
REGISTER SETTING
CONFIG1:D9 to D8
GPSIF2 GPSIF1 GPSIF0
311 SIGN LSB MSB
210M COUNTER R COUNTER HANDSHAKE STATUS
101CHARGE PUMP UP CHARGE PUMP DOWN SDO
000CML CLOCK CALIBRATE LPF END XTL CLOCK SELECTED
MAX2741
Integrated L1-Band GPS Receiver
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.
QFN THIN.EPS
D2
(ND-1) X e
e
D
C
PIN # 1
I.D.
(NE-1) X e
E/2
E
0.08 C
0.10 C
A
A1
A3
DETAIL A
E2/2
E2
0.10 M C A B
PIN # 1 I.D.
b
0.35x45
D/2
D2/2
L
C
L
C
e e
L
CC
L
k
LL
DETAIL B
L
L1
e
XXXXX
MARKING
G
1
2
21-0140
PACKAGE OUTLINE,
16, 20, 28, 32L THIN QFN, 5x5x0.8mm
-DRAWING NOT TO SCALE-
L
COMMON DIMENSIONS
3.353.15
T2855-1 3.25 3.353.15 3.25
MAX.
3.20
EXPOSED PAD VARIATIONS
3.00T2055-2 3.10
D2
NOM.MIN.
3.203.00 3.10
MIN.
E2
NOM. MAX.
NE
ND
PKG.
CODES
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL
CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE
OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1
IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.25 mm AND 0.30 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220, EXCEPT EXPOSED PAD DIMENSION FOR T2855-1,
T2855-3 AND T2855-6.
NOTES:
SYMBOL
PKG.
N
L1
e
E
D
b
A3
A
A1
k
10. WARPAGE SHALL NOT EXCEED 0.10 mm.
JEDEC
T1655-1
3.203.00 3.10 3.00 3.10 3.20
0.70 0.800.75
4.90
4.90
0.25
0.25
0
--
4
WHHB
4
16
0.350.30
5.10
5.105.00
0.80 BSC.
5.00
0.05
0.20 REF.
0.02
MIN. MAX.NOM.
16L 5x5
3.10
T3255-2
3.00
3.20
3.00 3.10 3.20
2.70
T2855-2 2.60 2.602.80 2.70 2.80
L
0.30 0.500.40
---
---
WHHC
20
5
5
5.00
5.00
0.30
0.55
0.65 BSC.
0.45
0.25
4.90
4.90
0.25
0.65
--
5.10
5.10
0.35
20L 5x5
0.20 REF.
0.75
0.02
NOM.
0
0.70
MIN.
0.05
0.80
MAX.
---
WHHD-1
28
7
7
5.00
5.00
0.25
0.55
0.50 BSC.
0.45
0.25
4.90
4.90
0.20
0.65
--
5.10
5.10
0.30
28L 5x5
0.20 REF.
0.75
0.02
NOM.
0
0.70
MIN.
0.05
0.80
MAX.
---
WHHD-2
32
8
8
5.00
5.00
0.40
0.50 BSC.
0.30
0.25
4.90
4.90
0.50
--
5.10
5.10
32L 5x5
0.20 REF.
0.75
0.02
NOM.
0
0.70
MIN.
0.05
0.80
MAX.
0.20 0.25 0.30
DOWN
BONDS
ALLOWED
NO
YES3.103.00 3.203.103.00 3.20T2055-3
3.103.00 3.203.103.00 3.20T2055-4
T2855-3 3.15 3.25 3.35 3.15 3.25 3.35
T2855-6 3.15 3.25 3.35 3.15 3.25 3.35
T2855-4 2.60 2.70 2.80 2.60 2.70 2.80
T2855-5 2.60 2.70 2.80 2.60 2.70 2.80
T2855-7 2.60 2.70
2.80
2.60 2.70 2.80
3.203.00 3.10T3255-3 3.203.00 3.10
3.203.00 3.10T3255-4 3.203.00 3.10
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
3.203.00T1655-2 3.10 3.00 3.10 3.20 YES
NO3.203.103.003.10T1655N-1 3.00 3.20
3.353.15T2055-5 3.25 3.15 3.25 3.35
Y
3.35
3.15T2855N-1 3.25 3.15 3.25 3.35
N
3.35
3.15T2855-8 3.25 3.15 3.25 3.35
Y
3.203.10T3255N-1 3.00
NO
3.203.103.00
L
0.40
0.40
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
SEE COMMON DIMENSIONS TABLE
±0.15
11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.
G
2
2
21-0140
PACKAGE OUTLINE,
16, 20, 28, 32L THIN QFN, 5x5x0.8mm
-DRAWING NOT TO SCALE-
12. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages
.)

MAX2741ETI+

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
RF RECEIVER 1575.42MHZ 28TQFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet