200mW Single-Chip Transmitter ICs for
868MHz/915MHz ISM Bands
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX290_ EV kits. V
CC
= +2.7V to +4.5V, R
RLPF
= 68kΩ, R
PWRSET
= 22kΩ, 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
PWRSET = 22kΩ, V
CC
= +4.5V,
T
A
= +25°C
RF Output Power
PWRSET = 22kΩ, V
CC
= +4.5V,
T
A
= -40°C to +85°C
PWRSET = 22kΩ, V
CC
= +3.0V, T
A
= +25°C
RF Output Power Flatness
Adjacent Channel Power Ratio
Alternate Channel Power Ratio
OOK Control Range
ASK Output Power Adjustment
Range
RFOUT Rise and Fall Time
ASK output power back-
off relative to max power
OOKIN = high,
VASK = 0
OOKIN = high,
VASK = 1V
f
RF
= 900MHz to 930MHz
(MAX2900/MAX2901/MAX2902)
f
RF
= 867MHz to 870MHz
PN sequence at 1.22MHz
PN sequence at 1.22MHz
40
MIN
-3σ
21
20.5
18
20
0.3
0.1
-17
-26
80
41
dB
16
1
-50
-51
-63
dBc
< -70
µs
dBc
dBc
dB
TYP
23.5
+3σ
25
25
21
dB
dBm
MAX
UNITS
MAX2900–MAX2904
Square-wave signal applied on OOK
At 2nd harmonic of RF output frequency
with external matching network
At 3rd harmonic of RF output frequency
with external matching network
At 4th harmonic of RF output frequency
with external matching network
Out of 902MHz to 928MHz band other than
harmonics with external matching network
(MAX2900/MAX2901/MAX2902)
Out of 867MHz to 870MHz band other than
harmonics with external matching network
(MAX2903/MAX2904)
Spurious Emissions
< -70
Unlocked, Out-of-Band Spurious
Output Level
Any condition when synthesizer unlocked
(pin LD low)
Modulation off, measured at 960MHz, any
gain setting (MAX2900/MAX2901/MAX2902)
< -50
-126
-126
2:1
2:1
-120
dBm
Noise Level Out of Band
Modulation off, measured at 900MHz, any
gain setting (MAX2903/MAX2904)
Output VSWR for Guaranteed
Stability
Maximum Allowable Output VSWR
-120
dBm/Hz
Note 1:
Devices are production tested at T
A
= +25°C and +85°C. Min/Max values are guaranteed by design and characterization
over temperature and supply voltage.
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5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
