1

FEATURES

APPLICATIONS

DESCRIPTION

10−Bit

ADC

PLL

S/H

Serializer

1x ADCLK

6x ADCLK

IN1

P

ADCLK

IN1

N

10−Bit

ADC

S/H

Serializer

IN2

P

IN2

N

OUT2

P

OUT2

N

10−Bit

ADC

S/H

Serializer

IN3

P

IN3

N

OUT3

P

OUT3

N

LCLK

P

LCLK

N

ADCLK

P

ADCLK

N

12x ADCLK

10−Bit

ADC

S/H

Serializer

OUT4

P

OUT4

N

10−Bit

ADC

S/H

Serializer

IN5

P

10−Bit

ADC

S/H

Serializer

IN6

P

IN6

N

OUT6

P

10−Bit

ADC

S/H

Serializer

IN7

P

IN7

N

OUT7

P

OUT7

N

10−Bit

ADC

S/H

Serializer

Reference

IN8

P

IN8

N

INT/EXT

OUT8

P

OUT8

N

Registers

Control

ADS5277

8-Channel, 10-Bit, 65MSPS Analog-to-Digital Converter

with Serial LVDS Interface

An integrated phase lock loop (PLL) multiplies the

incoming ADC sampling clock by a factor of 12. This

23

• Maximum Sample Rate: 65MSPS

high-frequency clock is used in the data serialization

• 10-Bit Resolution

and transmission process. The word output of each

internal ADC is serialized and transmitted either MSB

• No Missing Codes

or LSB first. The word consists of 12 bits, of which

• Total Power Dissipation:

the 2 LSBs are zeroes and the remaining 10 bits

Internal Reference: 911mW

correspond to the output from the ADC. This

External Reference: 845mW

formatting is done in order to keep the interface

• CMOS Technology

compatible with the 12-bit parts of the family. In

addition to the eight data outputs, a bit clock and a

• Simultaneous Sample-and-Hold

word clock are also transmitted. The bit clock is at 6x

• 61.7dBFS SNR at 5MHz IF

the speed of the sampling clock, whereas the word

• 3.3V Digital/Analog Supply

clock is at the same speed of the sampling clock.

• Serialized LVDS Outputs

The ADS5277 provides internal references, or can

• Integrated Frame and Bit Patterns

optionally be driven with external references. Best

performance

is

achieved

through

the

internal

• Option to Double LVDS Clock Output Currents

reference mode.

• Four Current Modes for LVDS

The ADS5277 is available in a PowerPAD TQFP-80

• Pin- and Format-Compatible Family

package and is specified over a –40°C to +85°C

• TQFP-80 PowerPAD™ Package

operating range.

• Portable Ultrasound Systems

• Tape Drives

• Test Equipment

The

ADS5277

is

a

high-performance,

CMOS,

65MSPS,

8-channel

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.

RELATED PRODUCTS

RESOLUTION

SAMPLE RATE

MODEL

(BITS)

(MSPS)

CHANNELS

ADS5270

12

40

8

ADS5271

12

50

8

ADS5272

12

65

8

ADS5273

12

70

8

1

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.

2

PowerPAD is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.