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MAX2740ECM View Datasheet(PDF) - Maxim Integrated

Part Name
Description
View to exact match
MAX2740ECM
MaximIC
Maxim Integrated MaximIC
MAX2740ECM Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
Integrated GPS Receiver and Synthesizer
PIN
1, 2, 4, 5, 6,
10, 11, 14, 15,
21, 22, 23, 26,
29, 32, 37, 41,
42, 47,
paddle
3
7
8
NAME
GND
LNA_IN
RFMIX_IN-
GC
FUNCTION
Pin Description
Ground. Connect pin to ground.
Input of LNA Circuit. Matching network and blocking capacitor required.
Input to unused side of a differential pair that forms the RF section of a Gilbert cell mixer. This pin
should be AC-grounded through 100pF.
DC Control Voltage for Setting Gain Level of VGA. High input impedance. Voltage range of 0.5V
to 2.5V.
9
VCC_ANA Supply Voltage Pin for Analog Circuits. This pin requires external decoupling of typically 0.01µF.
12
VCC_VCO Supply Voltage Pin for VCO Circuit. This pin requires external decoupling of typically 1000pF.
13
TANK
VCO Resonator Pin. A resonator is required at this pin.
16
VCC_DIG
Supply Voltage Pin for Digital Section of the IC. This pin requires external decoupling of typically
0.01µF.
17
DOWN
Down Output from the Phase-Frequency Detector. This pulses high whenever the phase of the
VCO leads the phase of the reference.
18
UP
Up Output from the Phase-Frequency Detector. This pulses high whenever the phase of the VCO
lags the phase of the reference.
19
GLS_OUT Output of Buffer that Provides a 90MHz Clock Signal. Requires external blocking capacitor.
20
REF_IN
Reference Input for Synthesizer
24
FGA_OUT- FGA Inverted Output. Blocking capacitor required.
25
FGA_OUT+ FGA Noninverted Output. Blocking capacitor required.
27
FGA_IN-
FGA Inverted Input. Blocking capacitor required.
28
FGA_IN+ FGA Noninverted Input. Blocking capacitor required.
30
VGA_OUT- VGA Inverted Output. Blocking capacitor required.
31
VGA_OUT+ VGA Noninverted Output. Blocking capacitor required.
33
VGA_IN- VGA Inverted Input. Blocking capacitor required.
34
VGA_IN+ VGA Noninverted Input. Blocking capacitor required.
35
IFMIX_OUT- IF Mixer Inverted Output. Blocking capacitor required.
36
IFMIX_OUT+ IF Mixer Noninverted Output. Blocking capacitor required.
38
IFMIX_IN- IF Mixer Inverted Input. Blocking capacitor required.
39
IFMIX_IN+ IF Mixer Noninverted Input. Blocking capacitor required.
40
VCC_IFMIX Supply Voltage Pin for IF Downconverter. This pin requires external decoupling of typically
1000pF.
4 _______________________________________________________________________________________
 

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