THS0842

DUAL-INPUT, 8-BIT, 40 MSPS LOW-POWER ANALOG-TO-DIGITAL CONVERTER

WITH SINGLE OR DUAL PARALLEL BUS OUTPUT

SLAS246 – DECEMBER 1999

1

POST OFFICE BOX 655303

features

Analog-to-Digital Converter (ADC)

Using External References

Reference Voltages

Package

applications

Sampling)

description

The THS0842 is a dual 8-bit 40 MSPS high-speed A/D converter. It alternately converts each analog input signal

into 8-bit binary-coded digital words up to a maximum sampling rate of 40 MSPS with an 80 MHz clock. All digital

inputs and outputs are 3.3 V TTL /CMOS-compatible.

Thanks to an innovative single-pipeline architecture implemented in a CMOS process and the 3.3 V supply, the

device consumes very little power. In order to provide maximum flexibility, both bottom and top voltage

references can be set from user supplied voltages. Alternately, if no external references are available, on-chip

references can be used which are also made available externally. The full-scale range is 1 Vpp, depending on

the analog supply voltage. If external references are available, the internal references can be powered down

independently from the rest of the chip, resulting in an even greater power saving.

The device is specifically suited for the baseband sampling of wireless local loop (WLL) communication, cable

modems, set top boxes (STBs), and test instruments.

AVAILABLE OPTIONS

TA

PACKAGED DEVICES

TA

TQFP-48

–40

°C to 85°C

THS0842IPFB

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

23

DA0

DA1

DA2

DA3

DA4

DA5

DA6

DA7

NC

NC

24

23

22

21

20

19

18

17

16

15

14

13

4

37

38

39

40

41

42

43

44

45

46

47

48

I+

I–

STBY

SELB

CLK

OE

56

7

8

35 34 33 32 31

36

30

28 27 26

29

9 10 11 12

25

1

PFB PACKAGE

(TOP VIEW)

Copyright

© 1999, Texas Instruments Incorporated