14

LT1640AL/LT1640AH

Dimensions in inches (millimeters) unless otherwise noted.

N8 Package

8-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

N8 1098

0.100

(2.54)

BSC

0.065

(1.651)

TYP

0.045 – 0.065

(1.143 – 1.651)

0.130

± 0.005

(3.302

± 0.127)

0.020

(0.508)

MIN

0.018

± 0.003

(0.457

± 0.076)

0.125

(3.175)

MIN

12

3

4

87

6

5

0.255

± 0.015*

(6.477

± 0.381)

0.400*

(10.160)

MAX

0.009 – 0.015

(0.229 – 0.381)

0.300 – 0.325

(7.620 – 8.255)

0.325

+0.035

–0.015

+0.889

–0.381

8.255

()

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

PACKAGE DESCRIPTIO

Figure 13. Using PWRGD to Drive an Optoisolator

LT1640AL

PWRGD

SENSE

C1

150nF

25V

C3

100

µF

100V

Q1

IRF530

R2

10

Ω

5%

R7

51k

5%

R3

18k

5%

C2

3.3nF

100V

R4

562k

1%

R5

9.09k

1%

R6

10k

1%

R1

0.02

Ω

5%

4

3

2

OV

GND

– 48V

UV

56

8

7

1

4N25

GATE

DRAIN

1640A F13

PWRGD

+

GND

(SHORT PIN)

*

* DIODES INC. SMAT70A

4

3

2

1

APPLICATIO S I FOR ATIO