ADS5271_14 Datasheet, PDF (1/32 Pages) Texas Instruments – 8-Channel, 12-Bit, 50MSPS Analog-to-Digital Converter with Serial LVDS Interface

ADS5271
ADS5271
www.ti.com...................................................................................................................................................... SBAS313C – JUNE 2004 – REVISED JANUARY 2009
8-Channel, 12-Bit, 50MSPS Analog-to-Digital Converter
with Serial LVDS Interface
FEATURES
1
•23 Maximum Sample Rate: 50MSPS
• 12-Bit Resolution
• No Missing Codes
• Total Power Dissipation:
Internal Reference: 927mW
External Reference: 861mW
• CMOS Technology
• Simultaneous Sample-and-Hold
• 70.5dB 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
• TQFP-80 PowerPAD™ Package
APPLICATIONS
• Portable Ultrasound Systems
• Tape Drives
• Test Equipment
• Optical Networking
DESCRIPTION
The ADS5271 is a high-performance, 50MSPS,
8-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
ADS5270
ADS5272
ADS5273
ADS5277
RELATED PRODUCTS
RESOLUTION SAMPLE
(BITS)
RATE (MSPS)
12
40
12
65
12
70
10
65
CHANNELS
8
8
8
8
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
eight 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 ADS5271 provides internal references, or can
optionally be driven with external references. Best
performance is achieved through the internal
reference mode.
The device is available in a TQFP-80 PowerPAD
package and is specified over a –40°C to +85°C
operating range.
AD CLK
6x A DCLK
PLL
12x ADCLK
1x A DCLK
IN 1_P
S /H
I N 1_N
IN 2_P
S /H
I N 2N
IN 3_P
S /H
I N 3_N
IN 4_P
S /H
I N 4_N
IN 5_P
S /H
I N 5_N
IN 6_P
S /H
I N 6_N
IN 7_P
S /H
I N 7_N
IN 8_P
S /H
I N 8_N
1 2− B it
A DC
1 2− B it
A DC
1 2− B it
A DC
1 2− B it
A DC
1 2− B it
A DC
1 2− B it
A DC
1 2− B it
A DC
1 2− B it
A DC
Serialize r
Serialize r
Serialize r
Serialize r
Serialize r
Serialize r
Serialize r
Serialize r
R e fe re n c e
R eg isters
C o n tr o l
INT/E XT
LCLK_P
LCLK_N
A DCLK_P
A DCLK_N
OUT1_P
OUT1_N
OUT2_P
OUT2_N
OUT3_P
OUT3_N
OUT4_P
OUT4_N
OUT5_P
OUT5N
OUT6_P
OUT6_N
OUT7_P
OUT7_N
OUT8_P
OUT8_N
1
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.
2
All other trademarks are the property of their respective owners.
3
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 © 2004–2009, Texas Instruments Incorporated