MAX1479 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1479 Datasheet PDF : 10 Pages
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300MHz to 450MHz Low-Power,
Crystal-Based +10dBm ASK/FSK Transmitter
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, all RF inputs and outputs are 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)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
SYSTEM PERFORMANCE
Frequency Range
Turn-On Time (Note 5)
fRF
(Note 2)
Settle to within 50kHz
tON
Settle to within 5kHz
300
450 MHz
200
µs
350
Maximum Data Rate (Note 4)
ASK mode (Manchester coded)
FSK mode (Manchester coded)
100
kbps
20
Maximum FSK Frequency
Deviation
Output Power (Note 2)
POUT
Transmit Efficiency with CW Tone
(Note 7)
Transmit Efficiency at 50% Duty
Cycle
PHASE-LOCKED-LOOP PERFORMANCE
DEV[2:0] = 111
fRF = 315MHz
(Note 6)
fRF = 433MHz
TA = +25°C, VDD = +2.7V
TA = +125°C, VDD = +2.1V
TA = -40°C, VDD = +3.6V
fRF = 315MHz
fRF = 433MHz
fRF = 315MHz
fRF = 433MHz
55
kHz
80
6.8
10
12.0
2.7
5.3
dBm
12.2 16.1
35
%
34
27
%
25
VCO Gain
Phase Noise
Maximum Carrier Harmonics
Reference Spur
Loop Bandwidth
KVCO
fRF = 315MHz
fRF = 433MHz
fRF = 315MHz
fRF = 433MHz
BW
fOFFSET = 100kHz
fOFFSET = 1MHz
fOFFSET = 100kHz
fOFFSET = 1MHz
280
MHz/V
-75
-98
dBc/Hz
-74
-98
-50
dBc
-45
-40
dBc
300
kHz
Crystal Frequency Range
Crystal Tolerance
fXTAL
FRF / 32
50
MHz
ppm
Crystal Load Capacitance
Clock Output Frequency
CLOAD
(Note 8)
Determined by CLK0 and CLK1; see Table 1
4.5
FXTAL/N
pF
MHz
Note 1: Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match.
Note 2: 100% tested at TA = +125°C. Guaranteed by design and characterization over temperature.
Note 3: 50% duty cycle at 10kHz ASK data (Manchester coded).
Note 4: Guaranteed by design and characterization, not production tested.
Note 5: VENABLE = VIL to VENABLE = VIH. fOFFSET is defined as the frequency deviation from the desired carrier frequency.
Note 6: Dependent on crystal and PCB trace capacitance.
Note 7: VENABLE > VIH, VDATA > VIH, Efficiency = POUT/(VDD x IDD).
Note 8: Dependent on PCB trace capacitance.
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