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| MAX1472_10 Datasheet, PDF (3/9 Pages) Maxim Integrated Products – 300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter | |||
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300MHz-to-450MHz Low-Power,
Crystal-Based ASK Transmitter
ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, output power is referenced to 50â¦, 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)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
PHASE-LOCKED LOOP PERFORMANCE
VCO Gain
330
MHz/V
Phase Noise
Maximum Carrier Harmonics
Reference Spur
Loop Bandwidth
fRF = 315MHz
fOFFSET =100kHz
fOFFSET = 1MHz
-84
-91
fRF = 433MHz
fOFFSET =100kHz
fOFFSET = 1MHz
-82
-89
fRF = 315MHz
-50
fRF = 433MHz
-50
fRF = 315MHz
-75
fRF = 433MHz
-81
1.6
dBc/Hz
dBc
dBc
MHz
Crystal Frequency
Oscillator Input Impedance
fXTAL
From each XTAL pin to GND
fRF / 32
6.2
MHz
pF
Frequency Pushing by VDD
DIGITAL INPUTS
3
ppm/V
Data Input High
VIH
Data Input Low
VIL
Maximum Input Current
VDD- 0.25
2
V
0.25
V
nA
Pulldown Current
25
µA
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: Output power can be adjusted with external resistor.
Note 6: Guaranteed by design and characterization at fRF = 315MHz.
Note 7: VENABLE < VIL to VENABLE > VIH. fOFFSET is defined as the frequency deviation from the desired carrier frequency.
Note 8: VENABLE > VIH, VDATA > VIH, Efficiency = POUT/(VDD x IDD).
Note 9: VENABLE > VIH, DATA toggled from VIL to VIH, 10kHz, 50% duty cycle, Efficiency = POUT/(VDD x IDD).
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