WMS7170_05 Datasheet, PDF (15/23 Pages) Winbond – NONVOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE

WMS7170/1
11. TYPICAL APPLICATION CIRCUITS
R_A
R_B
Vin
WMS71XX
_
OP
AMP
+
RB
V_OUT = - V_{IN RA}
R_A =
RAB(256 − D) _,
256
R_BB =
RAB D
256
R_AB = Total resistance of potentiometer
D = Wiper setting for WMS71XX
V_OUT
FIGURE 5 – PROGRAMMABLE INVERTING GAIN AMPLIFIER USING THE WMS7170/1
V_IN
+
V_OUT
OP
_ ^AMP
R_A
R_BB
RB
V_OUT = V_IN (1+ _RA )
WMS71XX
R_A =
RAB(256
256
− D)
,
R_BB
=
RAB D
256
R_AB = Total resistance of potentiometer
D = Wiper setting for WMS71XX
FIGURE 6 – PROGRAMMABLE NON-INVERTING GAIN AMPLIFIER USING THE WMS7170/1
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Publication Release Date: April 21, 2005
Revision 1.1