ADS5240 Datasheet, PDF (1/24 Pages) Burr-Brown (TI) – 4-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface

BurrĆBrown Products
from Texas Instruments
¨
ADS5240
SBAS326C – JUNE 2004 – REVISED DECEMBER 2004
4-Channel, 12-Bit, 40MSPS ADC
with Serial LVDS Interface
FEATURES
• Maximum Sample Rate: 40MSPS
• 12-Bit Resolution
• No Missing Codes
• Power Dissipation: 607mW
• CMOS Technology
• Simultaneous Sample-and-Hold
• 70.5dBFS SNR at 10MHz IF
• Internal and External References
• 3.3V Digital/Analog Supply
• Serialized LVDS Outputs
• Integrated Frame and Bit Patterns
• MSB and LSB First Modes
• Option to Double LVDS Clock Output Currents
• Pin- and Format-Compatible Family
• HTQFP-64 PowerPAD™ Package
APPLICATIONS
• Portable Ultrasound Systems
• Tape Drives
• Test Equipment
• Optical Networking
DESCRIPTION
The ADS5240 is a high-performance, 4-channel,
40MSPS 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
MODEL
RESOLUTION
(BITS)
ADS5242⁽¹⁾
12
(1) Available Q1 2005.
SAMPLE RATE
(MSPS)
CHANNELS
65
4
An integrated phase lock loop multiplies the incoming
ADC sampling clock by a factor of 12. This 12x clock
is used in the process of serializing the data output
from each channel. The 12x clock is also used to
generate a 1x and a 6x clock, both of which are
transmitted as LVDS clock outputs. The 6x clock is
denoted by the differential pair LCLK_P and LCLK_N,
while the 1x clock is denoted by ADCLK_P and
ADCLK_N. The word output of each ADC channel can
be transmitted either as MSB or LSB first. The bit
coinciding with the rising edge of the 1x clock output
is the first bit of the word. Data is to be latched by the
receiver on both the rising and falling edges of the 6x
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.
6X ADCLK
ADCLK
PLL
1X ADCLK
IN 1 _P
S/H
IN1_N
IN 2 _P
S/H
IN2_N
IN 3 _P
S/H
IN3_N
IN 4 _P
S/H
IN4_N
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
Serializer
Serializer
Serializer
Serializer
Reference
R e g is te rs
C o n tr o l
INT /E X T
LCLK_P
LCLK_N
ADC LK_P
ADC LK_N
OUT 1_P
OUT 1_N
OUT 2_P
OUT 2_N
OUT 3_P
OUT 3_N
OUT 4_P
OUT 4_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 other 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, Texas Instruments Incorporated