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Burr-Brown Corporation

ADS5271 Datasheet Preview

ADS5271 Datasheet

50MSPS ADC

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ADS5271
SBAS313A − JUNE 2004 − REVISED JUNE 2004
8-Channel, 12-Bit, 50MSPS ADC
with Serial LVDS Interface
FEATURES
D Maximum Sample Rate: 50MSPS
D 12-Bit Resolution
D No Missing Codes
www.DataSheet4UD.comPower Dissipation: 957mW
D CMOS Technology
D Simultaneous Sample-and-Hold
D 70.5dB SNR at 10MHz IF
D Internal and External References
D 3.3V Digital/Analog Supply
D Serialized LVDS Outputs
D Integrated Frame and Synch Patterns
D MSB and LSB First Modes
D Option to Double LVDS Clock Output Currents
D Pin- and Format-Compatible Family
D TQFP-80 PowerPADPackage
APPLICATIONS
D Portable Ultrasound Systems
D Tape Drives
D Test Equipment
D Optical Networking
DESCRIPTION
The ADS5271 is a high-performance, 50MSPS, 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 reduce the number of interface lines and
package size.
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 LCLKP and LCLKN, while the
1x clock is denoted by ADCLKP and ADCLKN. 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 ADS5271 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 a PowerPAD TQFP-80 package and
is specified over a −40°C to +85°C operating range.
6X ADCLK
ADCLK
PLL
1X ADCLK
IN1P
IN1N
S/H
IN2P
IN2N
S/H
IN3P
IN3N
S/H
IN4P
IN4N
S/H
IN5P
IN5N
S/H
IN6P
IN6N
S/H
IN7P
IN7N
S/H
IN8P
IN8N
S/H
12−Bit
ADC
12−Bit
ADC
12−Bit
ADC
12−Bit
ADC
12−Bit
ADC
12−Bit
ADC
12−Bit
ADC
12−Bit
ADC
Serializer
Serializer
Serializer
Serializer
Serializer
Serializer
Serializer
Serializer
Reference
Registers
Control
INT/EXT
LCLKP
LCLKN
ADCLKP
ADCLKN
OUT1P
OUT1N
OUT2P
OUT2N
OUT3P
OUT3N
OUT4P
OUT4N
OUT5P
OUT5N
OUT6P
OUT6N
OUT7P
OUT7N
OUT8P
OUT8N
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 registered 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 Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2004, Texas Instruments Incorporated
www.ti.com




Burr-Brown Corporation

ADS5271 Datasheet Preview

ADS5271 Datasheet

50MSPS ADC

No Preview Available !

ADS5271
SBAS313A − JUNE 2004 − REVISED JUNE 2004
www.ti.com
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage Range, AVDD . . . . . . . . . . . . . . . . . . . . . . −0.3V to 3.8V
Supply Voltage Range, LVDD . . . . . . . . . . . . . . . . . . . . . . −0.3V to 3.8V
Voltage Between AVSS and LVSS . . . . . . . . . . . . . . . . . . −0.3V to 0.3V
Voltage Between AVDD and LVDD . . . . . . . . . . . . . . . . . −0.3V to 0.3V
Voltages Applied to External REF Pins . . . . . . . . . . . . . . −0.3V to 2.4V
All LVDS Data and Clock Outputs . . . . . . . . . . . . . . . . . . −0.3V to 2.4V
Analog Input Pins
Clock Running . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 2.7V
Clock Not Running . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.15V to 2.7V
Peak Total Input Current (all inputs) . . . . . . . . . . . . . . . . . . . . . . −30mA
Operating Free-Air Temperature Range, TA . . . . . . . . . −40°C to 85°C
Lead Temperature 1.6mm (1/16from case for 10s) . . . . . . . . . 220°C
www.DataShe(1e)t4SUtr.ceossmes above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only, and
functional operation of the device at these or any other conditions
beyond those specified is not supported.
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to observe
proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
ORDERING INFORMATION
PRODUCT
PACKAGE-LEAD
PACKAGE
DESIGNATOR(1)
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
ADS5271
HTQFP-80
PFP
−40°C to +85°C ADS5271IPFP
ADS5271IPFP
Tray, 96
ADS5271IPFPT
Tape and Reel, 250
(1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.
(2) Thermal pad size: 4.69mm x 4.69mm (min), 6.20mm x 6.20mm (max).
RELATED PRODUCTS
MODEL
ADS5270
ADS5272
ADS5273
ADS5275
ADS5276
ADS5277
RESOLUTION (BITS)
12
12
12
10
10
10
SAMPLE RATE (MSPS)
40
65
70
40
50
65
CHANNELS
8
8
8
8
8
8
RECOMMENDED OPERATING CONDITIONS
SUPPLIES AND REFERENCES
Analog Supply Voltage, AVDD
Output Driver Supply Voltage, LVDD
CLOCK INPUT AND OUTPUTS
ADCLK Input Sample Rate (low-voltage TTL)
Low Level Voltage Clock Input
High Level Voltage Clock Input
ADCLKP and ADCLKN Outputs (LVDS)
LCLKP and LCLKN Outputs (LVDS)(1)
Operating Free-Air Temperature, TA
Thermal Characteristics
qJA
qJC
(1) 6 × ADCLK.
ADS5271
MIN TYP MAX
3.0 3.3 3.6
3.0 3.3 3.6
20 50
20 50
120 300
−40 +85
21
68
UNIT
V
V
MSPS
V
V
MHz
MHz
°C
°C/W
°C/W
REFERENCE SELECTION
MODE
2.0VPP Internal Reference
External Reference
INT/EXT
1
0
DESCRIPTION
Default with internal pull-up.
Internal reference is powered down. Common mode of external reference should be within 50mV of
VCM. VCM is derived from the internal bandgap voltage.
2


Part Number ADS5271
Description 50MSPS ADC
Maker Burr-Brown Corporation
Total Page 19 Pages
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