ADS5273_14 Datasheet, PDF (1/33 Pages) Texas Instruments – 8-Channel, 12-Bit, 70MSPS Analog-to-Digital Converter

ADS5273
www.ti.com .............................................................................................................................................. SBAS305D – JANUARY 2004 – REVISED JANUARY 2009
8-Channel, 12-Bit, 70MSPS Analog-to-Digital Converter
with Serial LVDS Interface
FEATURES
1
•23 Maximum Sample Rate: 70MSPS
• 12-Bit Resolution
• No Missing Codes
• Total Power Dissipation:
Internal Reference: 1W
External Reference: 937mW
• CMOS Technology
• Simultaneous Sample-and-Hold
• 71dBFS SNR at 5MHz 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
• Test Equipment
• Military
DESCRIPTION
The ADS5273 is a high-performance, CMOS,
70MSPS, 8-channel analog-to-digital converter
(ADC). An internal reference is 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
ADS5271
ADS5272
ADS5277
RELATED PRODUCTS
RESOLUTION
(BITS)
12
12
12
10
SAMPLE RATE
(MSPS)
40
50
65
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 ADS5273 provides an internal reference, or can
optionally be driven with an external reference. Best
performance is 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.
ADCLK
6x ADCLK
PLL
12x ADCL K
1x ADCLK
IN 1_P
S/H
IN 1_N
IN 2_P
S/H
IN 2N
IN 3_P
S/H
IN 3_N
IN 4P
S/H
IN 4_N
IN 5_P
S/H
IN 5_N
IN 6_P
S/H
IN 6N
IN 7_P
S/H
IN 7_N
IN 8_P
S/H
IN 8_N
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
12− Bit
ADC
S erializer
S erializer
S erializer
S erializer
S erializer
S erializer
S erializer
S erializer
Referen ce
R e g ist er s
Con trol
IN T/EXT
LCL K_P
LCL K_N
ADCLK _P
ADCLK _N
O U T 1_P
O U T 1_N
O U T 2_P
O U T 2_N
O U T 3_P
O U T 3_N
O U T 4P
O U T 4_N
O U T 5_P
O U T 5_N
O U T 6_P
O U T 6_N
O U T 7_P
O U T 7_N
O U T 8_P
O U T 8_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