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| 型号： | MAX7060ATG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/31页 |
| 文件大小： | 0K |
| 描述： | IC TX ASK/FSK 280-450MHZ 24TQFN |
| 标准包装： | 2,500 |
| 频率： | 280MHz ~ 450MHz |
| 应用： | 通用 |
| 调制或协议： | ASK，OOK |
| 数据传输率 - 最大： | 140kbps |
| 功率 - 输出： | 15dBm |
| 电流 - 传输： | 34mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 2.1 V ~ 3.6 V，4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | * |
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MAX7060
280MHz to 450MHz Programmable
ASK/FSK Transmitter
Detailed Description
The MAX7060 is power and frequency programmable
from 280MHz to 450MHz. The MAX7060 has an internal
transmit power control that can be programmed over a
28dB power range. The MAX7060 has tuning capacitors
at the output of the power amplifier (PA) to ensure high-
power efficiency at various programmable frequencies
with a single matching network.
The crystal-based architecture of the MAX7060 elimi-
nates many of the common problems with SAW trans-
mitters by providing greater modulation depth, faster
frequency settling, tighter tolerance of the transmit fre-
quency, and reduced temperature dependence. In par-
ticular, the tighter transmit frequency tolerance means
that a superheterodyne receiver with a narrower IF
bandwidth (therefore lower noise bandwidth) can be
used. The payoff is better overall receiver performance
when using a superheterodyne receiver such as the
MAX1473, MAX1471, MAX7033, MAX7034, MAX7036,
and MAX7042.
The MAX7060 can be configured in either SPI or manual
mode, where the transmitter can easily be configured
without the need of an SPI interface.
In the 3V operation, the MAX7060 can be put in a low-
power shutdown mode by pulling ENABLE low and
LSHDN high. In this mode, all the blocks are shut down
including power-on reset (POR). All the MAX7060 reg-
isters must be reprogrammed after LSHDN is asserted
high. In the 5V operation, the low-power shutdown mode
is not available, and LSHDN should be connected to
GND.
Frequency Programming
The MAX7060 is a crystal-referenced phased-locked-
loop (PLL) VHF/UHF transmitter that transmits data over
a wide frequency range. The internal VCO can be tuned
from 280MHz to 450MHz and controlled by a single
crystal to cover up to a 1.47:1 carrier-frequency range.
The transmit frequency is set by the crystal frequency
and the programmable divider in the PLL; the program-
mable PLL divide ratios can be set anywhere from 19 to
28, which means that with a crystal frequency of 15MHz,
the output is 285MHz to 420MHz. With a crystal frequen-
cy of 16MHz, the output is 304MHz to 448MHz.
The MAX7060 has an internal variable capacitor con-
nected across the PA output. This capacitor can be pro-
grammed to maintain high-efficiency transmission at any
frequency within a 1.47 to 1 (28/19) tuning range. This
Maxim Integrated
means that it is possible to change the frequency and
retune the antenna to the new frequency in a very short
time. The combination of rapid antenna-tuning ability
with rapid synthesizer tuning makes the MAX7060 a true
frequency-agile transmitter. The tuning capacitor has a
nominal resolution of 0.25pF, from 0 to 7.75pF.
The MAX7060 supports data rates up to 100kbps NRZ
in ASK mode and 140kbps NRZ in FSK mode. In FSK
mode, the frequency deviation corresponding to bit 1
and bit 0 can be set as low as Q 2kHz, and as high as
Q 100kHz. The frequency deviation is fully programmable
in SPI mode, and can be selected either as Q 16kHz or
Q 50kHz in manual mode.
Power Amplifier (PA)
The PA of the MAX7060 is a high-efficiency, open-drain
switching-mode amplifier. In a switching-mode amplifier,
the gate of the final-stage FET is driven with a very sharp
25% duty-cycle square wave at the transmit frequency.
This square wave is derived from the synthesizer circuit.
When the matching network is tuned correctly, the output
FET resonates the attached tank circuit with a minimum
amount of power dissipated in the FET. With a proper
output-matching network, the PA can drive a wide range
of antenna impedances, which include a small-loop PCB
trace and a 50 I antenna. The output-matching network
suppresses the carrier harmonics and transforms the
antenna impedance to an optimal impedance at PAOUT,
which is from 60 I to 125 I . When the output-matching
network is properly tuned, the MAX7060 transmits power
with a high overall efficiency. The efficiency of the PA
itself is approximately 50%.
Transmitter Power Control
The transmitter power of the MAX7060 can be set in
approximately 1dB steps (SPI mode) to produce a maxi-
mum output power level of +14dBm with a 5V supply.
If a battery is used as the supply, the maximum output
power level varies from +15dBm at 3.6V to +10dBm at
2.1V. The minimum power level is -14dBm for both 5V
and battery supplies. The maximum transmitter power
(and the transmitter current) can be lowered by increas-
ing the load impedance on the PA. Four fixed power
levels are available in manual mode.
When a 5V supply is used, the V DD5 and GPOVDD pins
are connected to the 5V supply. AVDD is the output of
an internal voltage regulator and must be connected
externally to DVDD and PAVDD. The PAVOUT pin is
connected to the PAOUT pin through a biasing inductor.
PAVOUT is not connected to any of the power-supply
13
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| MAX7060EVKIT+ | 功能描述:射频开发工具 MAX7060 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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| MAX706APESA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:+3V Voltage Monitoring, Low-Cost uP Supervisory Circuits |
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