AD9231_17 Datasheet, PDF (1/37 Pages) Analog Devices – 12-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter

Data Sheet
12-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS,
1.8 V Dual Analog-to-Digital Converter
AD9231
FEATURES
1.8 V analog supply operation
1.8 V to 3.3 V output supply
SNR
71.3 dBFS at 9.7 MHz input
69.0 dBFS at 200 MHz input
SFDR
93 dBc at 9.7 MHz input
83 dBc at 200 MHz input
Low power
32 mW per channel at 20 MSPS
71 mW per channel at 80 MSPS
Differential input with 700 MHz bandwidth
On-chip voltage reference and sample-and-hold circuit
2 V p-p differential analog input
DNL = ±0.40 LSB
Serial port control options
Offset binary, gray code, or twos complement data format
Optional clock duty cycle stabilizer
Integer 1-to-8 input clock divider
Data output multiplex option
Built-in selectable digital test pattern generation
Energy-saving power-down modes
Data clock out with programmable clock and data alignment
APPLICATIONS
Communications
Diversity radio systems
Multimode digital receivers
GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA
I/Q demodulation systems
Smart antenna systems
Battery-powered instruments
Hand held scope meters
Portable medical imaging
Ultrasound
Radar/LIDAR
FUNCTIONAL BLOCK DIAGRAM
AVDD
GND
SDIO SCLK CSB
VIN+A
VIN–A
VREF
SENSE
VCM
RBIAS
VIN–B
VIN+B
REF
SELECT
SPI
ADC
PROGRAMMING DATA
AD9231
ADC
DIVIDE DUTY CYCLE
1 TO 8 STABILIZER
MODE
CONTROLS
ORA
D11A
D0A
DCOA
DRVDD
ORB
D11B
D0B
DCOB
CLK+ CLK–
SYNC
DCS
Figure 1.
PDWN DFS OEB
PRODUCT HIGHLIGHTS
1. The AD9231 operates from a single 1.8 V analog power
supply and features a separate digital output driver supply
to accommodate 1.8 V to 3.3 V logic families.
2. The patented sample-and-hold circuit maintains excellent
performance for input frequencies up to 200 MHz and is
designed for low cost, low power, and ease of use.
3. A standard serial port interface supports various product
features and functions, such as data output formatting,
internal clock divider, power-down, DCO/DATA timing
and offset adjustments, and voltage reference modes.
4. The AD9231 is packaged in a 64-lead RoHS compliant
LFCSP that is pin compatible with the AD9268 16-bit
ADC, the AD9258 14-bit ADC, the AD9251 14-bit ADC,
and the AD9204 10-bit ADC, enabling a simple migration
path between 10-bit and 16-bit converters sampling from
20 MSPS to 125 MSPS.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] ©2009–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com