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参数资料
| 型号： | MAX3543EVKIT+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT MAX3543 |
| 标准包装： | 1 |
| 系列： | * |
Multiband Analog and
Digital Television Tuner
Table 24. R14: TEST1 Register (Address: 14h)
BIT NAME
RESERVED
BIT LOCATION
(0 = LSB)
7:0
TYPICAL
SETTING
0100
0000
FUNCTION
Must set to 0100 0000 for proper operation
Note: This register is not available to the end user.
Table 25 . R15: ROM WRITE DATA Register (Address: 15h)
BIT NAME
ROMW[7:0]
BIT LOCATION
(0 = LSB)
7:0
TYPICAL
SETTING
N/A
Maxim use only
FUNCTION
Note: This register is not available to the end user.
Applications Information
RF Inputs and Filters
The MAX3543 features separate low- and high-frequency
inputs. These two inputs are combined to a single input
by an off-chip diplexer circuit as shown in the Typical
Application Circuit . When the desired channel is less
than 345MHz, use RFINL. When the desired input is
greater than 345MHz, use RFINH. Further, when the
desired input is less than 110MHz, an internal lowpass
filter should be enabled to limit high-frequency interfer-
ence incident at the mixer input. The lowpass filter is
enabled by the RFLPF bit in R05[5].
Besides selecting the appropriate input port and setting
RFLPF appropriately, one of three tracking filters must
be chosen based on the desired frequency. Set TFB
(R05[3:2]) to select VHFL, VHFH, or UHF tracking filter
bands. Use VHFL when the desired frequency is less
than 196MHz, use VHFH when the desired frequency
is between 196MHz and 440MHz, or use UHF when the
desired frequency is greater than 440MHz.
RF Gain Control
The MAX3543 is designed to control its own RF gain
based on internally measured signal and blocker levels.
The user can adjust the AGC attack points (takeover
points) by setting WDPA and NDPA in register R0B.
Alternatively, the user can control the RF gain by driving
the RFVGC input pin.
VCO and VCO Divider Selection
The MAX3543 frequency synthesizer includes three
VCOs with 16 sub-bands for each VCO. These VCOs
and sub-bands are selected to best center the VCO
near the operating frequency. This selection process is
performed automatically by the VAS circuitry. The Maxim
driver software seeds the VCO starting band for fastest
selection time.
In addition to VCO selection, a VCO divider value of 32,
16, 8, or 4 must be selected to provide the desired mixer
LO drive frequency. The divider is selected by VDIV in
register R00[1:0].
Reading the ROM Table
The MAX3543 includes 13 ROM registers to store fac-
tory calibration data (see Table 26). Each ROM table
entry must be read using a two-step process. First,
the address of the ROM bits to be read must be pro-
grammed into the ROM ADDR register (R0E[3:0]).
Once the address has been programmed, the data
stored in that address is automatically transferred to the
ROM READBACK register (R10[7:0]). The ROM data at
the specified address can then be read from the ROM
READBACK register and stored in the microprocessor’s
local memory. After all ROM registers have been read
and stored in the microprocessor’s local memory, ROM
ADDR must be programmed to 00 for proper operation.
______________________________________________________________________________________
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3543EVKIT+ | 功能描述:射频开发工具 MAX3542/3 Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MAX3544CTL+ | 制造商:Maxim Integrated Products 功能描述:EVKIT FOR DIGITAL TV TUNER - Rail/Tube |
| MAX3544CTL+T | 制造商:Maxim Integrated Products 功能描述:MULTIBAND DIGITAL TELEVISION TUNER - Tape and Reel |
| MAX354C/D | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX354CPE | 功能描述:多路器开关 IC 8:1 Fault-Protected Analog MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
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