ADS5275 Datasheet, PDF (1/20 Pages) Texas Instruments – 8-Channel, 10-Bit, 40MSPS ADC with Serial LVDS Interface

BurrĆBrown Products
from Texas Instruments
ADS5275
SBAS300 – JANUARY 2004 – REVISED NOVEMBER 2004
8-Channel, 10-Bit, 40MSPS ADC
with Serial LVDS Interface
FEATURES
• Maximum Sample Rate: 40MSPS
• 10-Bit Resolution
• No Missing Codes
• Power Dissipation: 768mW
• CMOS Technology
• Simultaneous Sample-and-Hold
• 60.5dB SNR at 10MHz IF
• Serialized LVDS Outputs Meet or Exceed
Requirements of ANSI TIA/EIA-644-A Standard
• Internal and External References
• 3.3V Digital/Analog Supply
• TQFP-80 PowerPAD™ Package
APPLICATIONS
• Portable Ultrasound Systems
• Tape Drives
• Test Equipment
DESCRIPTION
The ADS5275 is a high-performance, 40MSPS,
8-channel, parallel 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 re-
duce the number of interface lines and package size.
In LVDS, an integrated phase lock loop multiplies the
incoming ADC sampling clock by a factor of 6. This
high-frequency LVDS clock is used in the data
serialization and transmission process and is con-
verted to an LVDS signal for transmission in parallel
with the data. Providing this additional LVDS clock
allows for easy delay matching. The word output of
each internal ADC is serialized and transmitted either
MSB or LSB first. The bit following the rising edge of
the ADC clock output is the first bit of the word.
The ADS5275 provides internal references, or can
optionally be driven with external references. Best
performance can be achieved through the internal
reference mode.
The ADS5275 is available in a PowerPAD TQFP-80
package and are specified over a -40°C to +85°C
operating range.
6X ADCLK
ADCLK
PLL
1X ADCLK
IN 1_P
S/H
IN 1_N
IN 2_P
S/H
IN 2_N
IN 3_P
S/H
IN 3_N
IN 4_P
S/H
IN 4_N
IN 5_P
S/H
IN 5_N
IN 6_P
S/H
IN 6_N
IN 7_P
S/H
IN 7_N
IN 8_P
S/H
IN 8_N
10−Bit
ADC
10−Bit
ADC
10−Bit
ADC
10−Bit
ADC
10−Bit
ADC
10−Bit
ADC
10−Bit
ADC
10−Bit
ADC
Se rializer
Se rializer
Se rializer
Se rializer
Se rializer
Se rializer
Se rializer
Se rializer
Reference
R egisters
C o ntro l
IN T /E XT
L C LK _P
L C LK _N
ADCLK_P
ADCLK_N
OUT1_P
OUT1_N
OUT2_P
OUT2_N
OUT3_P
OUT3_N
OUT4_P
OUT4_N
OUT5_P
OUT5_N
OUT6_P
OUT6_N
OUT7_P
OUT7_N
OUT8_P
OUT8_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.
PRODUCT PREVIEW information concerns products in the forma-
tive or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright © 2004, Texas Instruments Incorporated