Datasheet
MAX2900–MAX2904
200mW Single-Chip Transmitter ICs for
868MHz/915MHz ISM Bands
5
Maxim Integrated
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 MIN -3σ TYP +3σ MAX U N I T S
PWRSET = 22kΩ, V
CC
= +4.5V,
T
A
= +25°C
21 23.5 25
PWRSET = 22kΩ, V
CC
= +4.5V,
T
A
= -40°C to +85°C
20.5 25
RF Output Power
P WRS E T = 22kΩ , V
C C
= + 3.0V , T
A
= + 25°C 18 20 21
d Bm
f
RF
= 900MHz to 930MHz
(MAX2900/MAX2901/MAX2902)
0.3
RF Output Power Flatness
f
RF
= 867MHz to 870MHz
0.1
d B
Adjacent Channel Power Ratio PN sequence at 1.22MHz -17 d Bc
Alternate Channel Power Ratio PN sequence at 1.22MHz -26 d Bc
OOK Control Range 40 80 d B
OOKIN = high,
VASK = 0
41
ASK Output Power Adjustment
Range
ASK output power back-
off relative to max power
OOKIN = high,
VASK = 1V
16
d B
RFOUT Rise and Fall Time Square-wave signal applied on OOK 1 µs
At 2nd harmonic of RF output frequency
with external matching network
-50
At 3rd harmonic of RF output frequency
with external matching network
-51
At 4th harmonic of RF output frequency
with external matching network
-63
Out of 902MHz to 928MHz band other than
harmonics with external matching network
(MAX2900/MAX2901/MAX2902)
< -70
Spurious Emissions
Out of 867MHz to 870MHz band other than
harmonics with external matching network
(MAX2903/MAX2904)
< -70
d Bc
Unlocked, Out-of-Band Spurious
Output Level
Any condition when synthesizer unlocked
(pin LD low)
< -50 d Bm
Modulation off, measured at 960MHz, any
gain setting (MAX2900/MAX2901/MAX2902)
-126 -120
Noise Level Out of Band
Modulation off, measured at 900MHz, any
gain setting (MAX2903/MAX2904)
-126 -120
d Bm /H z
Output VSWR for Guaranteed
Stability
2:1
M axi m um Al l ow ab l e Outp ut V S WR 2:1
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.