FEATURES
APPLICATIONS
DESCRIPTION
10−Bit
ADC
PLL
S/H Serializer
1x ADCLK
6x ADCLK
IN1P
ADCLK
IN1N
OUT1P
OUT1N
10−Bit
ADCS/H Serializer
IN2P
IN2N
OUT2P
OUT2N
10−Bit
ADCS/H Serializer
IN3P
IN3N
OUT3P
OUT3N
LCLKP
LCLKN
ADCLKP
ADCLKN
12x ADCLK
10−Bit
ADCS/H Serializer
IN4P
IN4N
OUT4P
OUT4N
10−Bit
ADCS/H Serializer
IN5P
IN5N
OUT5P
OUT5N
10−Bit
ADCS/H Serializer
IN6P
IN6N
OUT6P
OUT6N
10−Bit
ADCS/H Serializer
IN7P
IN7N
OUT7P
OUT7N
10−Bit
ADCS/H Serializer
Reference
IN8P
IN8N
R
E
F
TINT/EXT
V
C
M
R
E
F
B
OUT8P
OUT8N
Registers
S
C
L
K
S
D
A
T
A
C
S
Control
R
E
S
E
T
P
D
ADS5277
SBAS333C – FEBRUARY 2005 – REVISED SEPTEMBER 2005
8-Channel, 10-Bit, 65MSPS Analog-to-Digital Converter
with Serial LVDS Interface
An integrated phase lock loop (PLL) multiplies the
incoming ADC sampling clock by a factor of 12. This• Maximum Sample Rate: 65MSPS
high-frequency clock is used in the data serialization• 10-Bit Resolution
and transmission process. The word output of each
internal ADC is serialized and transmitted either MSB• No Missing Codes
or LSB first. The word consists of 12 bits, of which• Total Power Dissipation:
the 2 LSBs are zeroes and the remaining 10 bitsInternal Reference: 911mW
correspond to the output from the ADC. ThisExternal Reference: 845mW
formatting is done in order to keep the interface• CMOS Technology
compatible with the 12-bit parts of the family. In
addition to the eight data outputs, a bit clock and a• Simultaneous Sample-and-Hold
word clock are also transmitted. The bit clock is at 6x• 61.7dBFS SNR at 5MHz IF
the speed of the sampling clock, whereas the word• 3.3V Digital/Analog Supply
clock is at the same speed of the sampling clock.
• Serialized LVDS Outputs The ADS5277 provides internal references, or can
• Integrated Frame and Bit Patterns optionally be driven with external references. Best
performance is achieved through the internal• Option to Double LVDS Clock Output Currents
reference mode.• Four Current Modes for LVDS
The ADS5277 is available in a PowerPAD TQFP-80• Pin- and Format-Compatible Family
package and is specified over a – 40 ° C to +85 ° C• TQFP-80 PowerPAD ™ Package
operating range.
• Portable Ultrasound Systems
• Tape Drives
• Test Equipment
The ADS5277 is a high-performance, CMOS,
65MSPS, 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.
RELATED PRODUCTS
RESOLUTION SAMPLE RATE
MODEL (BITS) (MSPS) CHANNELS
ADS5270 12 40 8
ADS5271 12 50 8
ADS5272 12 65 8
ADS5273 12 70 8
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 trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.