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参数资料
| 型号： | MAX7032ATJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | IC TRASCEIVER ASK/FSK 32TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 频率： | 300MHz ~ 450MHz |
| 数据传输率 - 最大： | 33kbps |
| 调制或协议： | ASK，FSK，OOK |
| 应用： | 车库门开启器，遥控，双向 RKE |
| 功率 - 输出： | 10dBm |
| 灵敏度： | -114dBm |
| 电源电压： | 2.1 V ~ 3.6 V，4.5 V ~ 5.5 V |
| 电流 - 接收： | 6.7mA |
| 电流 - 传输： | 12.5mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
MINIMUM PEAK
MAX7032
DETECTOR
MAX7032
PDMIN
PEAK
PEAK
DATA
SLICER
DET
DET
BASEBAND
FILTER
TRK_EN = 1
MAXIMUM PEAK
DETECTOR
TO SLICER
INPUT
DATA
C
PDMAX
R
R
PDMIN
C
PDMAX
TRK_EN = 1
Figure 4. Generating Data Slicer Threshold Using the Peak
Detectors
Figure 5. Peak-Detector Track Enable
The maximum and minimum peak detectors can be
used together to form a data slicer threshold voltage at
a value midway between the maximum and minimum
voltage levels of the data stream (see the Data Slicer
section and Figure 4). The RC time constant of the
peak-detector combining network should be set to at
least 5 times the data period.
If there is an event that causes a significant change in
RECEIVER ENABLED, TRK_EN SET
TRK_EN CLEARED
MAX PEAK DETECTOR
the magnitude of the baseband signal, such as an AGC
gain switch or a power-up transient, the peak detectors
may “catch” a false level. If a false peak is detected,
the slicing level is incorrect. The MAX7032 has a fea-
200mV/div
FILTER OUTPUT
MIN PEAK DETECTOR
DATA OUTPUT
ture called peak-detector track enable (TRK_EN),
where the peak-detector outputs can be reset (see
Figure 5). If TRK_EN is set (logic 1), both the maximum
and minimum peak detectors follow the input signal.
When TRK_EN is cleared (logic 0), the peak detectors
revert to their normal operating mode. The TRK_EN
function is automatically enabled for a short time when-
ever the IC is first powered up, or transitions from trans-
mit to receive mode, or recovers from the sleep portion
of DRX mode, or when an AGC gain switch occurs
regardless of the bit setting. Since the peak detectors
exhibit a fast-attack/slow-decay response, this feature
allows for an extremely fast startup or AGC recovery.
See Figure 6 for an illustration of a fast-recovery
sequence. In addition to the automatic control of this
function, the TRK_EN bits can be controlled through the
serial interface (see the Serial Control Interface section).
Transmitter
Power Amplifier (PA)
The PA of the MAX7032 is a high-efficiency, open-
drain, switch-mode amplifier. The PA with proper
DATA OUTPUT
2V/div
100 μ s/div
Figure 6. Fast Receiver Recovery in FSK Mode Utilizing Peak
Detectors
output-matching network can drive a wide range of
antenna impedances, which includes a small-loop PCB
trace and a 50 Ω antenna. The output-matching network
for a 50 Ω antenna is shown in the Typical Application
Circuit. The output-matching network suppresses the
carrier harmonics and transforms the antenna imped-
ance to an optimal impedance at PAOUT (pin 5). The
optimal impedance at PAOUT is 250 Ω .
When the output-matching network is properly tuned,
the PA transmits power with a high overall efficiency of
up to 32%. The efficiency of the PA itself is more than
46%. The output power is set by an external resistor at
PAOUT and is also dependent on the external antenna
and antenna-matching network at the PA output.
16
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| MAX7032EVSYS-315 | 功能描述:射频开发工具 MAX7032 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 |
| MAX7032EVSYS-433 | 功能描述:射频开发工具 MAX7032 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 |
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