1FEATURES

23· Maximum Sample Rate: 65MSPS

· 10-Bit Resolution

· No Missing Codes

· Total Power Dissipation:

Internal Reference: 911mW

External Reference: 845mW

· CMOS Technology

· Simultaneous Sample-and-Hold

· 61.7dBFS SNR at 5MHz IF

· 3.3V Digital/Analog Supply

· Serialized LVDS Outputs

· Integrated Frame and Bit Patterns

· Option to Double LVDS Clock Output Currents

· Four Current Modes for LVDS

· Pin- and Format-Compatible Family

· TQFP-80 PowerPAD™ Package

APPLICATIONS

· Portable Ultrasound Systems

· Tape Drives

· Test Equipment

DESCRIPTION

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.

An integrated phase lock loop (PLL) multiplies the

incoming ADC sampling clock by a factor of 12. This

high-frequency clock is used in the data serialization

and transmission process. The word output of each

internal ADC is serialized and transmitted either MSB

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

the 2 LSBs are zeroes and the remaining 10 bits

correspond to the output from the ADC. This formatting is done in order to keep the interface

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

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

word clock are also transmitted. The bit clock is at 6x the speed of the sampling clock, whereas the word

clock is at the same speed of the sampling clock.

The ADS5277 provides internal references, or can

optionally be driven with external references. Best

performance is achieved through the internal

reference mode.

The ADS5277 is available in a PowerPAD TQFP-80

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