Datasheet

9
LT1236
TYPICAL APPLICATIONS
U
Boosted Output Current
with No Current Limit
LT1236
OUT
V
+
≥ (V
OUT
+ 1.8V)

GND
IN
LT1236 TA05
+
2N2905
10V AT
100mA
2µF
SOLID
TANT
R1
220Ω
Boosted Output Current
with Current Limit
LT1236
OUT

GND
IN
LT1236 TA06
+
2N2905
10V AT
100mA
2µF
SOLID
TANT
D1*
LED
V
+
≥ V
OUT
+ 2.8V
8.2Ω
R1
220Ω
GLOWS IN CURRENT LIMIT,
DO NOT OMIT
*
LT1236 TA17
LT1236-10
GND
+10V15V V
OUT
V
IN
LT1236-10
GND
–10V
–15V
V
OUT
V
IN
COM
I
LOAD
R1
–15V
R1
=
–10V
I
LOAD
+ 1.5mA
±10V Output Reference
LT1236-10
OUT
GND
IN
LT1236 TA07
R
L
30mA
15V
R1*
169Ω
V
OUT

10V
TYPICAL LOAD
CURRENT = 30mA
SELECT R1 TO DELIVER TYPICAL LOAD CURRENT.
LT1236 WILL THEN SOURCE OR SINK AS NECESSARY
TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD 
AS OUTPUT WILL BE DRIVEN UNREGULATED HIGH. LINE
REGULATION IS DEGRADED IN THIS APPLICATION
*
Operating 5V Reference from 5V Supply
Handling Higher Load Currents
LT1236-5
OUT
IN
GND

LT1236 TA15
+
+
1N914
1N914
≈8.5V
C2*
5µF
C1*
5µF
5V
REFERENCE
5V LOGIC
SUPPLY
CMOS LOGIC GATE**
f
IN
≥ 2kHz*
FOR HIGHER FREQUENCIES C1 AND C2 MAY BE DECREASED
PARALLEL GATES FOR HIGHER REFERENCE CURRENT LOADING
*
**
LT1236-10
TRIM
GND
OUT

LT1236 TA14
–
+
1.2k
R2
40.2Ω
1%
R1
4.99k
1%
REF
CMOS
DAC
LTC7543
I
OUT
FB
30pF
LT1007C
R4*
100Ω
FULL-SCALE
ADJUST
R3
4.02K
1%
10V
F.S.
–15V
TC LESS THAN 200ppm/°C
NO ZERO ADJUST REQUIRED
WITH LT1007 (V
0S
≤ 60µV)
*
**
CMOS DAC with Low Drift Full-Scale Trimming**
Trimming 10V Units to 10.24V
LT1236-10
OUT
IN
TRIM
GND
4.32k
V
OUT
= 10.24V
V
IN
5k
V
–
= –15V*
*MUST BE WELL REGULATED
dV
OUT
dV
–
=
15mV
V
LT1236 TA11