THS0842 Datasheet, PDF (1/29 Pages) Texas Instruments – DUAL-INPUT, 8-BIT, 40 MSPS LOW-POWER ANALOG-TO-DIGITAL CONVERTER WITH SINGLE OR DUAL PARALLEL BUS OUTPUT

THS0842
DUAL-INPUT, 8-BIT, 40 MSPS LOW-POWER ANALOG-TO-DIGITAL CONVERTER
WITH SINGLE OR DUAL PARALLEL BUS OUTPUT
SLAS246 – DECEMBER 1999
features
D Dual Simultaneous Sample and Hold Inputs
D Differential or Single-Ended Analog Inputs
D 8-Bit Resolution 40 MSPS Sampling
Analog-to-Digital Converter (ADC)
D Single or Dual Parallel Bus Output
D Low Power Consumption: 275 mW Typ
Using External References
D Wide Analog Input Bandwidth: 600 MHz Typ
D 3.3 V Single-Supply Operation
D 3.3 V TTL /CMOS-Compatible Digital I/O
D Internal or External Bottom and Top
Reference Voltages
D Adjustable Reference Input Range
D Power-Down (Standby) Mode
D 48-Pin Thin Quad Flat Pack (TQFP)
Package
applications
D Digital Communications (Baseband
Sampling)
D Cable Modems
D Set Top Boxes
D Test Instruments
PFB PACKAGE
(TOP VIEW)
AV_DD
I+
I–
AV_SS
AV_DD
STBY
DV_SS
SELB
DV_DD
AV_SS
CLK
OE
36 35 34 33 32 31 30 29 28 27 26 25
37
24
38
23
39
22
40
21
41
20
42
19
43
18
44
17
45
16
46
15
47
14
48
13
1 2 3 4 5 6 7 8 9 10 11 12
DRV_SS
DA0
DA1
DA2
DA3
DA4
DA5
DA6
DA7
NC
NC
DRV_DD
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.
TA
– 40°C to 85°C
AVAILABLE OPTIONS
PACKAGED DEVICES
TQFP-48
THS0842IPFB
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.
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.
Copyright © 1999, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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