MAX2900_07 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – 200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM Bands

19-2145; Rev 2; 12/07
200mW Single-Chip Transmitter ICs for
868MHz/915MHz ISM Bands
General Description
Features
The MAX2900–MAX2904 complete single-chip 200mW
transmitters are designed for use in the 868MHz/
915MHz frequency bands. The MAX2900/MAX2901/
MAX2902 are compliant with the FCC CFR47 part 15.247
902MHz to 928MHz ISM-band specifications. MAX2903/
MAX2904 are compliant with the ETSI EN330-220 speci-
fication for the European 868MHz ISM band.
These transmitter ICs offer a high level of integration
while minimizing the number of external components.
This is achieved by full integration of the transmit modu-
lator, power amplifier, RF VCO, 8-channel frequency syn-
thesizer, and baseband PN sequence lowpass filter. By
filtering the BPSK modulation, the spurious emissions are
reduced, enabling up to eight independent transmit
channels in the U.S. ISM band. Inputs are provided for
spread-spectrum BPSK, ASK, and OOK. FM can be
achieved by directly modulating the VCO. The devices
are intended primarily for use with an external differential
antenna.
Applications
♦ Versions for U.S. 902MHz to 928MHz Band and
European 868MHz Band
♦ -7dBm to +23dBm Adjustable Differential RF
Output Power
♦ +23dBm Output Power at 4.5V, +20dBm Output
Power at 3.0V
♦ Support BPSK, OOK, ASK, and FM Modulations
♦ Modulation Filter for Direct Sequence BPSK up to
8Mchips/s
♦ Fully Integrated VCO with On-Chip Tank
♦ Extremely Low Frequency Pulling for OOK
Modulation (typ 60kHz peak, 5kHz RMS)
♦ Integrated Frequency Synthesizer for up to
8 Channels (MAX2900)
♦ +2.7V to +4.5V Supply Operation
♦ Small 28-Pin QFN Package with Exposed Pad
(5mm ✕ 5mm)
Ordering Information
Automatic Meter Reading
Wireless Security Systems/Alarms
Wireless Sensors
Wireless Data Networks
Wireless Building Control
PART
MAX2900EGI
MAX2901EGI
MAX2902EGI
MAX2903EGI
MAX2904EGI
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QFN-EP*
28 QFN-EP*
28 QFN-EP*
28 QFN-EP*
28 QFN-EP*
*Exposed pad
Functional Diagrams/Pin Configurations
CPOUT VCC5
28
27
D2 REFOUT VCC4 REFIN OSC
26 25 24 23 22
CPOUT VCC5 DIV63 REFOUT VCC4 REFIN OSC
28
27 26
25 24 23 22
VTUNE 1
GND 2
VREG 3
VCC1 4
RLPF 5
MAX2900
CP
÷4
REG
8-CHANNEL
SYNTHESIZER
21 D0
20 ^D1
19 N.C.
18 N.C.
17 RF+
VTUNE 1
GND 2
VREG 3
VCC1 4
RLPF 5
MAX2901/
MAX2903
CP
DUAL-
REG
CHANNEL
(/62 OR /63)
SYNTHESIZER
21 ^VCO+
20 ^VCO-
19 DIVOUT
18 GND
17 RF+
EN ⁶
GATE
REFEN ⁷
16 RF-
15 GND
EN ⁶
GATE
REFEN ⁷
16 RF-
15 GND
8
9
10
11
12 13 14
MODIN OOKIN VCC2 VASK LD PWRSET VCC3
Functional Diagrams/Pin Configurations are continued at end of data sheet.
8
9
10
11
MODIN OOKIN VCC2 VASK
12 13 14
LD PWRSET VCC3
________________________________________________________________ Maxim Integrated Products 1
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