1FEATURES

23· Maximum Sample Rate: 40MSPS

· 12-Bit Resolution

· No Missing Codes

· Total Power Dissipation:

Internal Reference: 584mW

External Reference: 518mW

· CMOS Technology

· Simultaneous Sample-and-Hold

· 70.5dBFS SNR at 10MHz 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

· HTQFP-64 PowerPAD™ Package

APPLICATIONS

· Portable Ultrasound Systems

· Tape Drives

· Test Equipment

· Optical Networking

· Communications

DESCRIPTION

The ADS5240 is a high-performance, 40MSPS,

4-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 LVDS 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. In addition to the

four 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 ADS5240 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 an HTQFP-64 PowerPAD

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