EV1050 Datasheet, PDF (7/9 Pages) CML Microcircuits – User Manual

Evaluation Kit User Manual for FX105A
EV1050
TP3
VIN
VIN J1
VSS
D3
C7
C8
SIG.IN
C9
JP1 TP9
R8
R6
TP7
VDD ^C6
JP2
R10 _{R9 R7 C10}
C5
D4
U2
TP10
FX105AP3
R1
C1A
1
TP8
TP4 VSS
TP11
R1V
SW3
RVV
SW4
RWV
C3ARWARW
TP14
C2Avdd
C4
C2B _vdd D1
RVA
RV C3B
R3
R4
TP6 Vss TP5 Q1
board mod
1 2 3 4 5 _TP1
R1A
C1B ^TP12
R2V
SW1
R2
D2 ^R5
TP2
DETECT
R2A SW2
Figure 3 Evaluation Board - Layout
1.6 Detailed Description
1.6.1 Hardware Description
JP1 is used to select the operating voltage. Open circuit selects 5.0V operation (default ) and
short circuit selects 3.0V operation.
1.6.1.1 Discrete components around the FX105A which the user may wish to alter are socketed.
Required values for a particular application can be calculated from the formulae given in the
FX105A datasheet.
Alternatively, a spreadsheet is provided in this kit to aid the user in selecting component values.
The required circuit parameters are entered in the green area and suggested component values
are shown to the right of the spreadsheet.
1.6.1.2 I_DD Measurement
The current consumption of the FX105A may be measured by removing the jumper on JP2 and
replacing it with a multimeter.
© 1998 Consumer Microcircuits Limited
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UM1050/2