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.