1

* This specification are subject to be changed without notice.

EM19101

8-BIT 5 MSPS A/D CONVERTER (CMOS)

4.23.1997

GENERAL DESCRIPTION

EM19101 is a 8-bit CMOS A/D converter for scanner use. The adoption of a 2-step parallel system achieves low

consumption at a maximum conversion speed of 7 MSPS.

FEATURES

• 7MSPS maximum conversion speed

• Build-in sampling and hold circuit

• Internal self-bias reference voltage

• 45 mW very low power dissipation at 5MSPS

• +5V single power supply

• Available in 24 pin SOP

• Series

EM19101M for 300 mil SOP

EM19101S for 209 mil SOP

APPLICATION

Scanner and a wide range of fields where high speed A/D conversion is required in the digital communication.

PIN ASSIGNMENT

EM19101

8-BIT 5 MSPS A/D CONVERTER (CMOS)

Lower data

latches

Upper data

latches

Lower encoder

(4bit)

Upper encoder

(4bit)

Lower

Comparators with

S/ H (4bit)

Upper

Comparators with

S/ H (4bit)

Reference voltage

4

3

6

5

8

7

10

9

12

11

2

1

15

13

14

16

17

18

19

20

21

22

23

24

Clock generator

/O E

DVS S

D0

D1

D2

D3

D4

D5

D6

D7

DV DD

CL K

DV DD

AV DD

AV DD

VRTS

VRT

AV DD

VI N

AVSS

VRBS

VRB

AVSS

DVSS

FUNCTIONAL BLOCK DIAGRAM

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

OE

DVSS

D0

D1

D2

D3

D4

D5

D6

D7

DVDD

CLK

DVSS

VRB

VRBS

AVSS

AVSS

VIN

AVDD

VRT

VRTS

AVDD

AVDD

DVDD

EM19101