MAX2903:200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM Bands

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 specification 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 modulator, power amplifier, RF VCO, 8-channel frequency synthesizer, 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.

Key Features
  • 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 x 5mm)
MAX2900: Pin Configuration
MAX2900: Pin Configuration
Applications/Uses
  • Automatic Meter Reading
  • Wireless Building Control
  • Wireless Data Networks
  • Wireless Security Systems/Alarms
  • Wireless Sensors
DataSheet
titleDownload file
MAX2900-MAX2904 Data SheetMAX2900-MAX2904.pdf
Parametrics
Part NumberApplicationsBand/ Freq.
(MHz)
Footprint
(mm x mm)
Package/PinsBudgetary
Price
See Notes
MAX2900ISM902 to 9285.0 x 5.0QFN/28
TQFN/28
$3.47 @1k
MAX2901ISM902 to 928QFN/28
TQFN/28
$3.51 @1k
MAX2902ISM902 to 928QFN/28
TQFN/28
$3.64 @1k
MAX2903ISM
ISM (Europe)
867 to 870QFN/28
TQFN/28
$3.51 @1k
MAX2904ISM
ISM (Europe)
867 to 870QFN/28
TQFN/28
$3.64 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2903EGINo Longer AvailableMAX2903ETI+QFN,;28 pin;26 mm²-40°C to +85°CNo
MAX2903EGI-TNo Longer AvailableMAX2903ETI+QFN;28 pin-40°C to +85°CSee data sheet
MAX2903ETI+ActiveTQFN,;28 pin;26 mm²-40°C to +85°CLead Free
MAX2903ETI+TActiveQFN;-40°C to +85°CSee data sheet
MAX2900-MAX2904.pdf MAX2904
RF Basics MAX7060
MAX2900-MAX2904.pdf MAX2904