Evaluation Kit User Manual for FX105A
EV1050
TP3
VIN
VIN
J1
D3
VSS
C7
C8
C9
JP1
R8
SIG.IN
TP9
R6
TP7
VDD C6
JP2
R9 R7 C10
1
D4
C5 U2
TP10
FX105AP3
C1A
R1
TP4 VSS
TP11
R1V
R10
SW3
TP13
TP8
SW1
TP12
RVV
SW4
RWV
C3ARWARW
TP14
C2A vdd
C4
C2B vdd D1
RVA
RV C3B
TP6
Vss
TP5
board mod
1
2
3
4
R4
Q1
5
TP1
R3
D2
TP2
R2
R1A
C1B
R2V
R2A SW2
R5
DETECT
Figure 3 Evaluation Board - Layout
1.6
1.6.1
Detailed Description
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
7
UM1050/2
CMLMICRO [ CML MICROCIRCUITS ]
