Datasheet

MAX2900–MAX2904
200mW Single-Chip Transmitter ICs for
868MHz/915MHz ISM Bands
15
Maxim Integrated
1
3
2
4 5
6 7
21 19 20 18 17 16 15
810911121314
28
2627 25 24 23 22
REFEN
EN
RLPF
C13
R5
VCC1
VREG
GND
WBFM
(OPT)
VTUNE
GND
C8
R7 R8
ASK
(OPT)
R6
RF-
RF+
D.C.
N.C.
VCO-
VCO+
OSC
REFIN
VCC4
REFOUT
R11
N.C.
VCC5
D.C.
VCC3
PWRSET
D.C.
VASK
VREG
VCC2
OOKIN
OOK
MODIN
MODIN (PN)
GATE
REG
MAX2902/
MAX2904
R10
VCC
CPOUT
REFIN
1GHz
FREQUENCY
SYNTH
RFIN
C37
VCOOUT
VCC_PA
C26
C15
C16
C12
L3
L1
L5
LOOP
ANTENNA
C31
C33
C28
C18
VCC_DRV
C4
C2
C1 C35
C3
R4
R3 R1
REFFREQ /FM
L4
L2
C32
C34
MAX2902/MAX2904 TYPICAL OPERATING CIRCUIT
Typical Operating Circuits (continued)