LT1054_15 Datasheet, PDF (19/33 Pages) Linear Technology – Switched-Capacitor Voltage Converter with Regulator

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System Examples (continued)
5 μF
+
12 V
LT1054
SLVS033G – FEBRUARY 1990 – REVISED JULY 2015
10 Ω
1/2 W
1
FB/SD
8
V_CC
2
CAP+
7
OSC
R1
LT1054 #1
3
6 ^{39.2 kΩ}
GND
V_REF
0.002 μF
+
1
FB/SD
10 Ω
1/2 W ₂
CAP+
8
V_CC
7
OSC
+
10 μF
LT1054 #2
3
6
GND
V_REF
20 kΩ
HP5082-2810
4
+
CAP−
10 μF
5
V_OUT
R2
200 kΩ
4
CAP−
5
V_OUT
+ ^{200 μF}
æ
ö
R2
=
ç
R1ç
çèç
V_OUT
V_{REF - 40}
2
mV
+
÷
1÷
÷ø÷
=
æ
R1_ççè
V_OUT
1.21 V
ö
+ 1_÷÷ø
V_O = −5 V
I_O = 0-200 mA
Pin numbers shown are for the P package.
Figure 23. 5-V to ±12-V Converter
5V
10 kΩ
Input TTL or
CMOS Low
for On
10 kΩ
2N2907
40 Ω
Zero Trim
10 kΩ
+
10 μF
0.022 μF
1
200 kΩ
8
−2
1/2
LT1013
+
3
A1
100 kΩ
100 kΩ
301 kΩ
350 Ω
Gain Trim
5 kΩ
5 kΩ
6 _− A2
1/2
10 kΩ
LT1013
5
+
1 μF
4
1 MΩ
7
V_OUT
1
FB/SD
8
V_CC
5V
+
10 μF
2 _CAP+
OSC ⁷
LT1054 #1
3
GND
6
V_REF
4
CAP−
V_OUT ⁵
3 kΩ
+ _100-μF
Tantalum
2N2222
Adjust Gain Trim For 3 V Out From
Full-Scale Bridge Output of 24 mV
Pin numbers shown are for the P package.
Figure 24. Strain-Gage Bridge Signal Conditioner
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