ADS5242 Datasheet, PDF (1/29 Pages) Texas Instruments – 4-Channel, 12-Bit, 65MSPS Analog-to-Digital Converter with Serial LVDS Interface

BurrĆBrown Products
from Texas Instruments
ADS5242
SBAS330C – OCTOBER 2004 – REVISED OCTOBER 2005
4-Channel, 12-Bit, 65MSPS Analog-to-Digital Converter
with Serial LVDS Interface
FEATURES
• Maximum Sample Rate: 65MSPS
• 12-Bit Resolution
• No Missing Codes
• Total Power Dissipation
Internal Reference: 660mW
External Reference: 594mW
• CMOS Technology
• Simultaneous Sample-and-Hold
• 70.8dBFS 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 ADS5242 is a high-performance, 65MSPS,
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.
MODEL
ADS5240
RELATED PRODUCTS
RESOLUTION
(BITS)
12
SAMPLE RATE
(MSPS)
40
CHANNELS
4
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 ADS5242 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.
ADCLK
6x ADCLK
12x ADCLK
PLL
1x ADCLK
IN1_P
S/H
IN1_N
IN2_P
S/H
IN2_N
IN3_P
S/H
IN3_N
IN4_P
S/H
IN4_N
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
Serializer
Serializer
Serializer
Serializer
R e fe re n c e
Registers
Control
INT/EXT
LCLK_P
LCLK_N
ADCLK_P
ADCLK_N
OUT1_P
OUT1_N
OUT2_P
OUT2_N
OUT3_P
OUT3_N
OUT4_P
OUT4_N
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 trademark of Texas Instruments.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004–2005, Texas Instruments Incorporated