Datasheet

OBSOLETE
LMS202
www.ti.com SNLS166E –DECEMBER 2002–REVISED APRIL 2013
APPLICATION INFORMATION
CAPACITOR SELECTION
The recommended capacitors are 0.1μF. However, larger capacitors for the charge pump may be used to
minimized ripples on V+ and V− pins.
POWER SUPPLY DECOUPLING
In some applications that are sensitive to power supply noise from the charge pump, place a decoupling
capacitor, Cbp, from V
S
to GND. Use at least a 0.1µF capacitor or the same size as the charge pump capacitors
(C1 − C4).
CHARGED PUMP
The dual internal charged-pump provides the ±10V to the to transmitters. Using capacitor C1, the charge pump
converts +5V to +10V then stores the +10V in capacitor C3. The charge pump uses capacitor C2 to invert the
+10V to −10V. The −10V is then stored in capacitor C4.
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