FEATURES

APPLICATIONS

DESCRIPTION

The ADS5270 is a high-performance, 40MSPS, 8-channel,

parallel analog-to-digital converter (ADC). Internal references

are provided, simplifying system design requirements. Low

power consumption allows for the highest of system

integration densities. Serial LVDS (low-voltage differential

signaling) outputs reduce the number of interface lines and

package size.

An integrated phase lock loop multiplies the incoming ADC

sampling clock by a factor of 12. This 12x clock is used in the

process of serializing the data output from each channel. The

12x clock is also used to generate a 1x and a 6x clock, both

of which are transmitted as LVDS clock outputs. The 6x clock

is denoted by the differential pair LCLKP and LCLKN, while the

1x clock is denoted by ADCLKP and ADCLKN. The word

output of each ADC channel can be transmitted either as MSB

or LSB first. The bit coinciding with the rising edge of the 1x

clock output is the first bit of the word. Data is to be latched by

the receiver on both the rising and falling edges of the 6x clock.

The ADS5270 provides internal references, or can optionally

be driven with external references. Best performance can be

achieved through the internal reference mode.

The device is available in a PowerPAD TQFP-80 package and

is specified over a −40

°C to +85°C operating range.

12−Bit

ADC

PLL

S/H

Serializer

1X ADCLK

6X ADCLK

ADCLK

12−Bit

ADC

S/H

Serializer

IN2

P

12−Bit

ADC

S/H

Serializer

OUT3

N

12−Bit

ADC

S/H

Serializer

12−Bit

ADC

S/H

Serializer

IN5

N

12−Bit

ADC

S/H

Serializer

12−Bit

ADC

S/H

Serializer

12−Bit

ADC

S/H

Serializer

Reference

IN8

N

INT/EXT

OUT8

N

Registers

Control

ADS5270

SBAS293D − JANUARY 2004 − REVISED MAY 2004

8-Channel, 12-Bit, 40MSPS ADC

with Serial LVDS Interface

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.

www.ti.com

Copyright

 2004, Texas Instruments Incorporated

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.

PowerPAD is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners.