参数资料
型号: MAX2740ECM
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 通信及网络
英文描述: Integrated GPS Receiver and Synthesizer
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP48
封装: 7 X 7 MM, 1 MM HEIGHT, EXPOSED PAD, TQFP-48
文件页数: 4/8页
文件大小: 189K
代理商: MAX2740ECM
M
Integrated GPS Receiver and Synthesizer
4
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Pin Description
PIN
NAME
FUNCTION
1, 2, 4, 5, 6,
10, 11, 14, 15,
21, 22, 23, 26,
29, 32, 37, 41,
42, 47,
p ad d e
GND
Ground. Connect pin to ground.
3
LNA_IN
Input of LNA Circuit. Matching network and blocking capacitor required.
7
RFMIX_IN-
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.
8
GC
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 0.01
μ
F.
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
0.01
μ
F.
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.
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