AD9255BCPZRL7-80 Datasheet, PDF (1/44 Pages) Analog Devices – 14-Bit, 125 MSPS/105 MSPS/80 MSPS

Data Sheet
14-Bit, 125 MSPS/105 MSPS/80 MSPS,
1.8 V Analog-to-Digital Converter
AD9255
FEATURES
SNR = 78.3 dBFS at 70 MHz and 125 MSPS
SFDR = 93 dBc at 70 MHz and 125 MSPS
Low power: 371 mW at 125 MSPS
1.8 V analog supply operation
1.8 V CMOS or LVDS output supply
Integer 1-to-8 input clock divider
IF sampling frequencies to 300 MHz
−153.4 dBm/Hz small signal input noise with 200 Ω input
impedance at 70 MHz and 125 MSPS
Optional on-chip dither
Programmable internal ADC voltage reference
Integrated ADC sample-and-hold inputs
Flexible analog input range: 1 V p-p to 2 V p-p
Differential analog inputs with 650 MHz bandwidth
ADC clock duty cycle stabilizer
Serial port control
User-configurable, built-in self-test (BIST) capability
Energy-saving power-down modes
APPLICATIONS
Communications
Multimode digital receivers (3G)
GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and
TD-SCDMA
Smart antenna systems
General-purpose software radios
Broadband data applications
Ultrasound equipment
PRODUCT HIGHLIGHTS
1. On-chip dither option for improved SFDR performance
with low power analog input.
2. Proprietary differential input that maintains excellent SNR
performance for input frequencies up to 300 MHz.
3. Operation from a single 1.8 V supply and a separate digital
output driver supply accommodating 1.8 V CMOS or
LVDS outputs.
4. Standard serial port interface (SPI) that supports various
product features and functions, such as data formatting
(offset binary, twos complement, or gray coding), enabling
the clock DCS, power-down, test modes, and voltage
reference mode.
5. Pin compatibility with the AD9265, allowing a simple
migration up to 16 bits.
FUNCTIONAL BLOCK DIAGRAM
SENSE RBIAS PDWN AGND AVDD (1.8V)
LVDS LVDS_RS
VREF
VCM
VIN+
VIN–
DITHER
CLK+
CLK–
SYNC
REFERENCE
AD9255
TRACK-AND-HOLD
CLOCK
MANAGEMENT
ADC
14-BIT
14
CORE
OUTPUT
STAGING ₁₄
CMOS OR
LVDS
(DDR)
SERIAL PORT
SVDD SCLK/ SDIO/ CSB
DFS DCS
Figure 1.
DRVDD (1.8V)
D13 TO D0
OR
OEB
DCO
Rev. C
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