28987 Dresden Elektronik, 28987 Datasheet - Page 21

• Manufacturer Part Number: 28987
• Description: DERFMEGA128-22C02
• Manufacturer: Dresden Elektronik
• Series: deRFmega128r

Specifications of 28987

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4
• Applications: General Purpose
• Power - Output: 2.4dBm
• Sensitivity: -101dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18mA
• Current - Transmitting: 18mA
• Data Interface: Solder Pads, 2 x 23
• Memory Size: 1Mb
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

User Manual
Version 01.03
2010-09-07
11. RF components
11.1. deRFmega128-22A00 / 22C00
The chip antenna on the deRFmega128-22A00 / 22C00 is matched with:
Some hints for the positioning of the radio module:
Figure 17: Matching circuit with chip-antenna
dresden elektronik
ingenieurtechnik gmbh
Enno-Heidebroek-Str. 12
01237 Dresden / Germany
L1 = 1,0nH (0402)
L2 = 2,2nH (0402)
avoid metallized environments in the near
place the module at the edge of a device
è mismatching of the antenna
è decreased transmit-range
Radio modules deRFmega128
Tel.: +49 351 – 31 85 00
Fax: +49 351 – 3 18 50 10
[e-mail]
www.dresden-elektronik.de
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