28987 Dresden Elektronik, 28987 Datasheet - Page 10

• 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
6. Soldering Profile of deRFmega128-22C00 and deRFmega128-22C02
Table 5 gives the soldering profile for the radio modules.
Table 5: Soldering Profile
Profile Feature
Average-Ramp-up Rate (217°C to Peak)
Preheat Temperature 175°C ±25°C
Temperature Maintained Above 217°C
Time within 5°C of Actual Peak Temperature
Peak Temperature Range
Ramp-down Rate
Time 25°C to Peak Temperature
Figure 7 shows a recorded soldering profile for a radio module. The blue colored line
illustrates a temperature sensor placed next to the soldering-contacts of the radio module.
The pink line shows the set temperatures depending on the zone within the reflow soldering
machine.
Figure 7: Recorded soldering profile
A solder process without supply of nitrogen causes a discoloration of the metal RF-shielding.
dresden elektronik
ingenieurtechnik gmbh
Enno-Heidebroek-Str. 12
01237 Dresden / Germany
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Radio modules deRFmega128
Tel.: +49 351 – 31 85 00
Fax: +49 351 – 3 18 50 10
[e-mail]
www.dresden-elektronik.de
Measured Temp.
t [s]
Zone Temp.
Values
3°C/sec max.
180 sec. max
60 sec. to 150 sec.
20 sec. to 40 sec.
260°
6°C/sec max.
8 min. max.
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