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MAX2900–MAX2904
200mW Single-Chip Transmitter ICs for
868MHz/915MHz ISM Bands
AC ELECTRICAL CHARACTERISTICS
(MAX290_ EV kits. V CC = +2.7V to +4.5V, R RLPF = 68k Ω , R PWRSET = 22k Ω , f RF = 917.28MHz (MAX2900/MAX2901/MAX2902) or f RF
= 868MHz (MAX2903/MAX2904), VASK = VREG, f REF = 14.56MHz (MAX2900/MAX2901/MAX2902) or f REF = 13.62MHz
(MAX2903/MAX2904), chip rate on MODIN = 1.22Mbps, P OUT = +23dBm, T A = -40°C to +85°C. Typical values are at V CC = +4.5V,
T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
-3 σ
TYP
+3 σ
MAX
UNITS
ANALOG INPUT PINS
VTUNE Input Capacitance
VTUNE = +1.35V
15
pF
DIGITAL INPUT PINS
Digital Input Pin Capacitance
VCO AND SYNTHESIZERS SECTION
3
pF
RFOUT Frequency Range
REFIN Reference Frequency
Range
REFDIV Fixed Reference Divider
Ratio
Main Divider Ratios
PLL Comparison Frequency
VCO Buffer Output Power
REFDIV Fixed Reference
Divider Ratio
VCO Phase Noise
VCO Tuning Gain
VCO Frequency Pulling with
OOK Modulation
PLL Phase Noise
(MAX2900/MAX2901/MAX2902)
(MAX2903/MAX2904)
(MAX2900/MAX2901/MAX2902)
(MAX2903/MAX2904)
(MAX2900)
Table 4 (MAX2900)
(MAX2901/MAX2903)
(MAX2900)
(MAX2901/MAX2903)
300 Ω differential load (MAX2901–MAX2904)
(MAX2901/MAX2903)
At 100kHz offset, measured at RFOUT,
PLL loop BW = 5kHz
(MAX2900/MAX2901/MAX2902)
(MAX2903/MAX2904)
OOKIN clocked at 19kHz, internal (crystal)
or external reference frequency
Measured at RFOUT, 5kHz offset,
PLL loop BW = 50kHz
902
867
14
13
4
249
62
3.5
13
1
44
917.28
868
14.56
13.78
4
3.64
-12
1
-101
65
85
5
60
-96
928
870
15
14.5
4
256
63
3.75
15
1
86
MHz
MHz
MHz
dBm
dBc/Hz
MHz/V
kHz RMS
kHz peak
dBc/Hz
REFOUT Voltage Swing
CPOUT Charge Pump Current
Reference Spurs
100
500
-62
mVp-p
μA
dBc
Reference Input Voltage for
Nominal Operation
Using an external frequency reference
200
300
mV
BPSK, OOK MODULATOR, AND PA
MODIN Frequency Range
Modulation Filter Nominal 3dB
Bandwidth
1.2
1
8
Mb/s
MHz
Modulation Filter Final Attenuation Measured at 30MHz
Carrier Suppression
28
41
28
dB
dB
4
Noise Power Density
At 960MHz (measured at RFOUT at
+23dBm output power)
-150
dBc/Hz
Maxim Integrated
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