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LT1236AI Datasheet(PDF) 9 Page - Linear Technology

Part # LT1236AI
Description  Precision Reference
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1236AI Datasheet(HTML) 9 Page - Linear Technology

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9
LT1236
TYPICAL APPLICATIONS
Boosted Output Current
with No Current Limit
LT1236
OUT
V+
≥ (VOUT + 1.8V)
GND
IN
LT1236 TA05
+
2N2905
10V AT
100mA
2
µF
SOLID
TANT
R1
220
Ω
Boosted Output Current
with Current Limit
LT1236
OUT
GND
IN
LT1236 TA06
+
2N2905
10V AT
100mA
2
µF
SOLID
TANT
D1*
LED
V+
≥ VOUT + 2.8V
8.2
Ω
R1
220
Ω
GLOWS IN CURRENT LIMIT,
DO NOT OMIT
*
LT1236 TA17
LT1236-10
GND
+10V
15V
VOUT
VIN
LT1236-10
GND
–10V
–15V
VOUT
VIN
COM
ILOAD
R1
–15V
R1
=
–10V
ILOAD + 1.5mA
±10V Output Reference
LT1236-10
OUT
GND
IN
LT1236 TA07
RL
30mA
15V
R1*
169
Ω
VOUT
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*
5
µF
C1*
5
µF
5V
REFERENCE
5V LOGIC
SUPPLY
CMOS LOGIC GATE**
fIN ≥ 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
40.2
Ω
1%
R1
4.99k
1%
REF
CMOS
DAC
LTC7543
IOUT
FB
30pF
LT1007C
R4*
100
Ω
FULL-SCALE
ADJUST
R3
4.02K
1%
10V
F.S.
–15V
TC LESS THAN 200ppm/
°C
NO ZERO ADJUST REQUIRED
WITH LT1007 (V0S ≤ 60µV)
*
**
CMOS DAC with Low Drift Full-Scale Trimming**
Trimming 10V Units to 10.24V
LT1236-10
OUT
IN
TRIM
GND
4.32k
VOUT = 10.24V
VIN
5k
V
– = –15V*
*MUST BE WELL REGULATED
dVOUT
dV
–
=
15mV
V
LT1236 TA11



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