参数资料
型号: MAX2112CTI+T
厂商: Maxim Integrated
文件页数: 8/19页
文件大小: 0K
描述: IC TUNER DIR-CONV DVB-S2 28-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
频率: 925MHz ~ 2.175GHz
应用: 数字 TV,CATV,机顶盒
电流 - 接收: 100mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
电源电压: 3.13 V ~ 3.47 V
工作温度: 0°C ~ 70°C
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 带卷 (TR)
MAX2112
Complete, Direct-Conversion
Tuner for DVB-S2 Applications
Pin Description
8
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
NAME
VCC_RF2
VCC_RF1
GND
RFIN
GC1
VCC_LO
VCC_VCO
VCOBYP
VTUNE
GNDTUNE
GNDSYN
CPOUT
VCC_SYN
XTAL
REFOUT
VCC_DIG
QOUT+
QOUT-
IOUT+
IOUT-
IDC+
IDC-
QDC+
QDC-
VCC_BB
FUNCTION
DC Power Supply for LNA. Connect to a +3.3V low-noise supply. Bypass to GND with a 1nF capacitor
connected as close as possible to the pin. Do not share capacitor ground vias with other ground connections.
DC Power Supply for LNA. Connect to a +3.3V low-noise supply. Bypass to GND with a 1nF capacitor
connected as close as possible to the pin. Do not share capacitor ground vias with other ground connections.
Ground. Connect to board’s ground plane for proper operation.
Wideband 75 ? RF Input. Connect to an RF source through a DC-blocking capacitor.
RF Gain-Control Input. High-impedance analog input with a 0.5V to 2.7V operating range.
V GC1 = 0.5V corresponds to the maximum gain setting.
DC Power Supply for LO Generation Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with
a 1nF capacitor connected as close as possible to the pin. Do not share capacitor ground vias with
other ground connections.
DC Power Supply for VCO Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with a 1nF
capacitor connected as close as possible to the pin. Do not share capacitor ground vias with other
ground connections.
Internal VCO Bias Bypass. Bypass to GND with a 100nF capacitor connected as close as possible to
the pin. Do not share capacitor ground vias with other ground connections.
High-Impedance VCO Tune Input. Connect the PLL loop filter output directly to this pin with as short of a
connection as possible.
Ground for VTUNE. Connect to the PCB ground plane.
Ground for Synthesizer. Connect to the PCB ground plane.
C h ar g e - P ump O u tp u t . Co n n e c t t h is o u t p u t t o t he P L L lo o p filt e r in p u t w it h th e sh or t e st c o n n e ct io n
p o ssib le .
DC Power Supply for Synthesizer Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with a
1nF capacitor connected as close as possible to the pin. Do not share capacitor ground vias with other
ground connections.
Crystal-Oscillator Interface. Use with an external parallel-resonance-mode crystal through a series 1nF
capacitor. See the Typical Application Circuit .
Crystal-Oscillator Buffer Output. A DC-blocking capacitor must be used when driving external circuitry.
DC Power Supply for Digital Logic Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with a
1nF capacitor connected as close as possible to the pin. Do not share capacitor ground vias with other
ground connections.
Quadrature Baseband Differential Output. AC-couple with 47nF capacitors to the demodulator input.
In-Phase Baseband Differential Output. AC-couple with 47nF capacitors to the demodulator input.
I-Channel Baseband DC Offset Correction. Connect a 47nF ceramic chip capacitor from IDC- to IDC+.
Q-Channel Baseband DC Offset Correction. Connect a 47nF ceramic chip capacitor from QDC- to QDC+.
DC Power Supply for Baseband Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with
a 1nF capacitor connected as close as possible to the pin. Do not share capacitor ground vias with
other ground connections.
Maxim Integrated
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