MAX1472AKA-T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1472AKA-T ,300MHz-to-450MHz Low-Power / Crystal-Based ASK TransmitterELECTRICAL CHARACTERISTICS(Typical Application Circuit, output power is referenced to 50Ω , V = 2.1 ..
MAX1472AKA-T10 ,300MHz-to-450MHz Low-Power, Crystal-Based ASK TransmitterMAX147219-2872; Rev 4; 6/12300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter
MAX1473ETJ+ ,315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic RangeFeaturesThe MAX1473 fully integrated low-power CMOS super-♦ Optimized for 315MHz or 433MHz ISM Band ..
MAX1473ETJ+T ,315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic RangeEVALUATION KIT AVAILABLEMAX1473315MHz/433MHz ASK SuperheterodyneReceiver with Extended Dynamic Range
MAX1473EUI ,315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic RangeApplicationsMAX1473ETJ -40°C to +85°C 32 Thin QFNAutomotive Remote Keyless Entry Security SystemsGa ..
MAX1473EUI+ ,315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic RangeELECTRICAL CHARACTERISTICS (3.3V OPERATION)(Typical Application Circuit, V = 3.0V to 3.6V, no RF si ..
MAX4053ACSE ,Low-Voltage / CMOS Analog Multiplexers/SwitchesApplications' Low Distortion: < 0.04% (600Ω)Battery-Operated Equipment' Low Crosstalk: < -90dB (50Ω ..
MAX4053ACSE ,Low-Voltage / CMOS Analog Multiplexers/SwitchesGeneral Description ________
MAX4053ACSE+ ,Low-Voltage, CMOS Analog Multiplexers/SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T = T to T , unl ..
MAX4053ACSE+ ,Low-Voltage, CMOS Analog Multiplexers/SwitchesELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T = T to T , unl ..
MAX4053AEEE ,Low-Voltage / CMOS Analog Multiplexers/SwitchesFeaturesThe MAX4051/MAX4052/MAX4053 and MAX4051A/' Pin Compatible with Industry-Standard MAX4052A/M ..
MAX4053AEEE ,Low-Voltage / CMOS Analog Multiplexers/SwitchesFeaturesThe MAX4051/MAX4052/MAX4053 and MAX4051A/' Pin Compatible with Industry-Standard MAX4052A/M ..

MAX1472AKA-T
300MHz-to-450MHz Low-Power / Crystal-Based ASK Transmitter
General Description
The MAX1472 is a crystal-referenced phase-locked
loop (PLL) VHF/UHF transmitter designed to transmit
OOK/ASK data in the 300MHz to 450MHz frequency
range. The MAX1472 supports data rates up to
100kbps, and adjustable output power to more than
+10dBm into a 50Ωload. The crystal-based architec-
ture of the MAX1472 eliminates many of the common
problems with SAW transmitters by providing greater
modulation depth, faster frequency settling, higher
tolerance of the transmit frequency, and reduced
temperature dependence. Combined, these improve-
ments enable better overall receiver performance when
using a superheterodyne receiver such as the MAX1470
or MAX1473.
The MAX1472 is available in a 3mm x 3mm 8-pin
SOT23 package and is specified for the automotive
(-40°C to +125°C) temperature range. An evaluation kit
is available. Contact Maxim Integrated Products for
more information.
Applications
Remote Keyless Entry
RF Remote Controls
Tire Pressure Monitoring
Security Systems
Radio-Controlled Toys
Wireless Game Consoles
Wireless Computer Peripherals
Wireless Sensors
Features2.1V to 3.6V Single-Supply OperationLow 5.3mA Operating Supply Current*Supports ASK with 90dB Modulation DepthOutput Power Adjustable to More than +10dBmUses Small Low-Cost CrystalSmall 3mm ✕3mm 8-Pin SOT23 PackageFast-On Oscillator 220µs Startup Time
*At 50% duty cycle (315MHz, 2.7V supply, +10dBm output
power)
MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
Pin Configuration
Ordering Information
Typical Application Circuit
19-2872; Rev 0; 5/03
MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDDto GND ..........................................................-0.3V to +4.0V
All Other Pins to GND ................................-0.3V to (VDD+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range.........................-40°C to +125°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, output power is referenced to 50Ω, VDD= 2.1V to 3.6V, VENABLE= VDD, TA= -40°C to +125°C, unless
otherwise noted. Typical values are at VDD= 2.7V, TA= +25°C, unless otherwise noted.) (Note 1)
MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, output power is referenced to 50Ω, VDD= 2.1V to 3.6V, VENABLE= VDD, TA= -40°C to +125°C, unless
otherwise noted. Typical values are at VDD= 2.7V, TA= +25°C, unless otherwise noted.) (Note 1)
Note 1:100% tested at TA= +25°C. Guaranteed by design and characterization over temperature.
Note 2:50% duty cycle at 10kHz data.
Note 3:Guaranteed by design and characterization, not production tested.
Note 4:Generally limited by PC board layout.
Note 5:VENABLE< VILto VENABLE> VIH. fOFFSETis defined as the frequency deviation from the desired carrier frequency.
Note 6:VENABLE> VIH, VDATA> VIH, Efficiency = POUT/(VDDx IDD).
Note 7:VENABLE> VIH, DATA toggled from VILto VIH, 10kHz, 50% duty cycle, Efficiency = POUT/(VDDx IDD).
Note 8:Output power can be adjusted with external resistor.
Note 9:Guaranteed by design and characterization at fRF= 315MHz.
MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
Typical Operating Characteristics
(Typical Application Circuit, VDD= 2.7V, TA= +25°C, unless otherwise noted.)
MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
MAX1472 toc10
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
MAX1472 toc11
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
MAX1472 toc12
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
PHASE NOISE vs. OFFSET FREQUENCY
MAX1472 toc13
fOFFSET (Hz)
PHASE NOISE (dBc/Hz)100k10k1k100
-14010M
SUPPLY CURRENT AND OUTPUT POWER
vs. EXTERNAL RESISTOR
MAX1472 toc14
EXTERNAL RESISTOR (Ω)
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)
SUPPLY CURRENT vs. OUTPUT POWER
MAX1472 toc15
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)624
FREQUENCY SETTLING TIME
MAX1472 toc16
25kHz/div
ENABLE
TRANSITION
FROM LOW
TO HIGH
ENABLE
TRANSITION
FROM LOW
TO HIGH
2.5kHz/div
START: 0s
START: 0s
1ms
1msypical Operating Characteristics (continued)
(Typical Application Circuit, VDD= 2.7V, TA= +25°C, unless otherwise noted.)
AM DEMODULATION OF PA OUTPUT
MAX1472 toc17
START: 0sSTOP: 20µs
15%/div
MAX1472
300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
Detailed Description
The MAX1472 is a highly integrated OOK/ASK transmit-
ter operating over the 300MHz to 450MHz frequency
range. The IC includes a complete PLL and a highly
efficient PA. The device can also be easily placed into
a 5nA low-power shutdown mode.
Shutdown Mode
The ENABLE pin is internally pulled down with a 15µA
current source. If the pin is left floating or pulled low,
the MAX1472 goes into shutdown mode, where the
supply current drops to less than 5nA. When ENABLE
is high, the IC is enabled and is ready for transmission
after 220µs (frequency settles to within 50kHz).
The 220µs turn-on time of the MAX1472 is mostly domi-
nated by the crystal oscillator startup time. Once the
oscillator is running, the 1.6MHz PLL loop bandwidth
allows fast-frequency recovery during power-amplifier
toggling.
Phase-Locked Loop
The PLL block contains a phase detector, charge
pump, integrated loop filter, VCO, 32X clock divider,
and crystal oscillator. This PLL requires no external
components, other than a crystal. The relationship
between the carrier and crystal frequency is given by:
fXTAL= fRF/ 32
The lock-detect circuit prevents the PA from transmit-
ting until the PLL is locked. In addition, the device shuts
down the PA if the reference frequency is lost.
Power Amplifier
The PA of the MAX1472 is a high-efficiency, open-drain,
class-C amplifier. With proper output matching network,
the PA can drive a wide range of impedances, including
the small-loop PC board trace antenna and any 50Ω
antenna. The output-matching network for a 50Ωanten-
na is shown in the Typical Application Circuit. The out-
put-matching network suppresses the carrier harmonics
and transforms the antenna impedance to an optimal
impedance at PAOUT (pin 4), which is about 250Ω.
When the output matching network is properly tuned,
the PA transmits power with high efficiency. The Typical
Application Circuitdelivers 10.3dBm at 2.7V supply with
9.1mA of supply current. Thus, the overall efficiency is
44%. The efficiency of the PA itself is more than 52%.
Applications Information
Output Power Adjustment
It is possible to adjust the output power down to
-10dBm with the addition of a resistor. The addition of
the power-adjust resistor also reduces power con-
sumption. See the Supply Current and Output Power
vs. External Resistor and Supply Current vs. Output
Power graphs in the Typical Operating Characteristics
section. It is imperative to add both a low-frequency
and a high-frequency decoupling capacitor as shown
in the Typical Application Circuit.

Partno	Mfg	Dc	Qty	Available	Descript
MAX1472AKA-T \|MAX1472AKAT	MAX	N/a	31	avai	300MHz-to-450MHz Low-Power / Crystal-Based ASK Transmitter