MICRF505 Summary

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MICRF505 Summary

• Smaller
• Very High Level of Integration
• 5x5mm MLF-32 Package
• Easier
• Fewer External Components To Select
• Less critical layout of PCB
• Better
• Excellent Sensitivity and Transmit Power
• Frequency Hopping further enhances RF link

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Small Package, High Integration, Low BOM
BOM BOM BOM
Part QTY Price (USD)
C 11 0.11
L 1 0.25
R 3 0.01
X-tal 1 0.35
Total 0.72
Prices in 10k qty Prices in 10k qty Prices in 10k qty
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MICRF505 Typical Application
Loop Filter (User Configurable To Accommodate
Wide Range of Data-Rates)
Crystal (Internally Trimmed By MICRF505)
Output Filter (Only RF interfacing)
Supply Bypass
RSSI Filter (Only Required if RSSI Output Using)
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MICRF505 I/O
Antenna Pin Internally Matched To 50Ohms Using
On-Board Inductors
3-Wire SPI To Configure MICRF505
Data I/O With Clock
Lock Detect and RSSI Output
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MICRF505 - Block diagram
Integrated Filters
Clock/Data Recovery
T/R Switch
On-Board Crystal Tuning
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MICRF505 Key Specifications
Parameter Typ Unit
Frequency 915/868 MHz
Output Power lt10 dBm
Data rate lt200 kbps
Sensitivity 1 -112 dBm
TX Current 2 28 mA
RX Current 13 mA
Power down lt1 uA
notes 1 2400bps 210dBm, 2.5V Supply voltage
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MICRF505 Implementation Attributes

• MLF32 PackageSize 5x5mm
• Low cost crystal, 30-50ppm
• 11 capasitors, 3 resistors and 1 inductor
• Can be implemented using simple two layer PCB
• Minimum PCB size using 0402 components ½ x ½
  inch

• How Do We Do It?
• Fully integrated VCO
• Integrated spiral inductors
• Integrated varactors
• Built-in T/R Switch
• No mechanical filters
• On chip 50 ohm antenna port

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MICRF505 Features summary

• Digital bit synchronizer
• RSSI (signal strength)
• Lock detector
• RX and TX power management
• Power down function (lt1uA)

• Received frequency error estimator
• Reference crystal tuning capabilities
• Baseband shaping
• Three wire SPI interface
• Register readback function