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DVK90121

P1-P3P4-P6P7-P8
EVB90121
MLX90121 Evaluation Board
2 Physical outline
Figures 2 and 3 show the outline of the MLX90121 evaluation board.
390129012101 Page 4 of 8 Evaluation Board
Rev. 002 Jan/07
Figure 2: MLX90121 evaluation board outline: top side
Figure 3: MLX90121 evaluation board outline: bottom side
EVB90121
MLX90121 Evaluation Board
390129012101 Page 5 of 8 Evaluation Board
Rev. 002 Jan/07
3 Components
The table below gives an overview of all components that composed the evaluation board EVB90121.
Reference Value Description
R1 7,5 kΩ
R2 4,7 kΩ
R3 4,7 kΩ
R4 10 Ω
R5,R6,R7,R8,R9,
1 kΩ
CV1 5-50 pF Tuned capacitor used to adjust the matching network to 50-ohm
C1,C2,C3,C6 10uF Decoupling capacitors, Tantalum type
C4 33 pF
C5 10 nF
C7 47 pF
C8,C9,C12 100 nF
C10,C11 22 pF
D1,D2 - Red LEDs
JP1 SMA connector Connection to a 50 ohms antenna
JP2 DIL10 connector Connection to a microcontroller
J1 Jack connector Power supply connection
J2 Debug connector
L1 VK200 Noise suppressor choke
L2 4,7 μH Through hole RF chokes type B78108S from EPCOS
L3 5,6 μH Through hole RF chokes type B78108S from EPCOS
L4 1,2 μH Through hole RF chokes type B78108S from EPCOS
U1 XC62FP +5Volts regulator, package SOT23
U2 XC6201 +3Volts regulator, package SOT23
U3 MLX90121 MLX90121CA device, package SSO20
Y1 Crystal Crystal oscillator
Table 1: Components
EVB90121
MLX90121 Evaluation Board
390129012101 Page 6 of 8 Evaluation Board
Rev. 002 Jan/07
4 Guidelines
This chapter describes all connections and jumpers available on the EVB90121 circuit to be able to use it in
the most efficient way.
4.1 Power supply
• The circuit can be supplied with a standard DC supply block (transformer or switch mode power supplies)
connected to the jack connector J1. The input supply can be selected from 6 to maximum 9 volts DC to
avoid permanent damage of the evaluation board.
• The internal power supply of the board can be selected between 3 Volts and 5 Volts DC by changing the
position of the jumper J3.
4.2 Antenna connection
• The SMA screw connector JP1 allows the connection of a 50-ohm antenna. The matching network is
adjusted with CV1 capacitor on a prefect 50-ohm load. This will give maximum power up to 250mWatt to
the connected antenna.
4.3 Connection to a microcontroller
• All digital Inputs/Outputs of the MLX90121 device are available on the JP2 connector. This allows easy
connection to a microcontroller. Following table is the description of JP2 connector.
Pin number (connector JP2) Name Description
1 DOUT Data Out
p
ut
2 - Not connected
3 DIN Data Input
4 RTB Reception or Transmission selection Input
5 MODE Configuration or Communication selection Input
6 CK Serial Clock Input
7 DSYNC Synchronization Output
8 - Not connected
9 GND Ground
10 - Not connected
Table 2: Connector JP2
P1-P3P4-P6P7-P8

DVK90121

Mfr. #:
Buy DVK90121
Manufacturer:
Melexis
Description:
KIT DEV FOR MLX90121
Lifecycle:
New from this manufacturer.
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