9

LT1236

Boosted Output Current

with No Current Limit

LT1236

OUT

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

8.2

Ω

R1

220

Ω

GLOWS IN CURRENT LIMIT,

DO NOT OMIT

*

LT1236 TA17

LT1236-10

GND

+10V

15V

LT1236-10

GND

–10V

–15V

COM

R1

–15V

R1

=

–10V

±10V Output Reference

LT1236-10

OUT

GND

IN

LT1236 TA07

30mA

15V

R1*

169

Ω

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**

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

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

*

**

CMOS DAC with Low Drift Full-Scale Trimming**

Trimming 10V Units to 10.24V

LT1236-10

OUT

IN

TRIM

GND

4.32k

5k

V

*MUST BE WELL REGULATED

dV

–

=

15mV

V

LT1236 TA11