LTC1852/LTC1853

23

18523fa

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However,

no responsibility is assumed for its use. Linear Technology Corporation makes no representation that

the interconnection of its circuits as described herein will not infringe on existing patent rights.

LTC1853 Hardwired for 4-Channel Differential Scan with Bipolar ±1.024V Operation

BUSY

D11/S2

D10/S1

D9/S0

D8

D7

D6

D5

D4

D3

D2

D1

D0

33

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

M1

M0

SHDN

CS

CONVST

RD

WR

DIFF

A2

A1

A0

UNI/BIP

PGA

48

36

47

46

45

44

43

42

41

40

39

38

37

OGND 34

18523 TA02

GND

GND

1.6384X

REFCOMP

13

16

REFIN

REFOUT

12

11

10

2.5V

4.096V

COM

CH7

CH6

CH5

CH4

CH3

CH2

CH1

CH0

14

9

8

7

6

5

4

3

2

1

INPUT

CONFIGURATION:

4 DIFFERENTIAL

CHANNELS: ±1.024V

15

0.1μF

5V

10μF

1μF

0.1μF

10μF

0.1μF

10μF

3V TO 5V

5V

5V

5V

5V

CONVERT

CLOCK

OUTPUT

DRIVERS

DATA

LATCHES

REF AMP

8-CHANNEL

MULTIPLEXER

2.5V

REFERENCE

INTERNAL

CLOCK

LTC1853

CONTROL LOGIC

AND

PROGRAMMABLE

SEQUENCER

12-BIT

SAMPLING

ADC

+

–

+

–

+

–

+

–

+

–

FW48 TSSOP REV A 1005

0.09 – 0.20

(.0035 – .008)

0° – 8°

0.25

REF

0.45 – 0.75

(.018 – .029)

0.17 – 0.27

(.0067 – .0106)

TYP

0.50

(.0197)

BSC

6.0 – 6.2**

(.236 – .244)

7.9 – 8.3

(.311 – .327)

13 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

12.40 – 12.60*

(.488 – .496)

1.10

(.0433)

MAX

0.05 – 0.15

(.002 – .006)

2

48

46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25

47

C

0.10

-T-

-C-

MILLIMETERS

(INCHES)

DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED .152mm (.006") PER SIDE

DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE

NOTE:

1. CONTROLLING DIMENSION: MILLIMETERS

2. DIMENSIONS ARE IN

3. DRAWING NOT TO SCALE

*

**

0.32 ±0.05

0.50 BSC

6.2 ±0.10

8.4 ±0.10

48

25

124

RECOMMENDED SOLDER PAD LAYOUT

0.95 ±0.10

TYPICAL APPLICATIONS

PACKAGE DESCRIPTION

FW Package

48-Lead Plastic TSSOP (6.1mm)

(Reference LTC DWG # 05-08-1651 Rev A)