Texas Instruments THS0842 Data Sheet

查询THS0842供应商 THS0842

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

WITH SINGLE OR DUAL PARALLEL BUS OUTPUT

SLAS246 – DECEMBER 1999

features PFB PACKAGE (TOP VIEW)

Dual Simultaneous Sample and Hold Inputs Differential or Single-Ended Analog Inputs 8-Bit Resolution 40 MSPS Sampling Analog-to-Digital Converter (ADC) Single or Dual Parallel Bus Output Low Power Consumption: 275 m W Typ

AVDD DRVSS

Using External References

I+ DA0

Wide Analog Input Bandwidth: 600 MHz Typ

I– DA1

3.3 V Single-Supply Operation

AVSS DA2

3.3 V TTL/CMOS-Compatible Digital I/O AVDD DA3

Internal or External Bottom and Top STBY DA4 Reference Voltages DVSS DA5 SELB DA6

Adjustable Reference Input Range

DVDD DA7

Power-Down (Standby) Mode

AVSS NC

48-Pin Thin Quad Flat Pack (TQFP)

CLK NC

Package

OE DRVDD

applications Digital Communications (Baseband Sampling) Cable Modems Set Top Boxes

Test Instruments

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 PACKAGED DEVICES

TQFP-48

–40°C to 85°C 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. Copyright  1999, Texas Instruments Incorporated

Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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