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| 型號(hào)： | AD9643BCPZ-210 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 2-CH 14-BIT FLASH METHOD ADC, PARALLEL ACCESS, QCC64 |
| 封裝： | 9 X 9 MM, ROHS COMPLIANT, MO-220VMMD-4, LFCSP-64 |
| 文件頁(yè)數(shù)： | 1/36頁(yè) |
| 文件大小： | 1659K |
| 代理商： | AD9643BCPZ-210 |
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14-Bit, 170 MSPS/210 MSPS/250 MSPS, 1.8 V
Dual Analog-to-Digital Converter (
ADC)
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2011 Analog Devices, Inc. All rights reserved.
FEATURES
SNR = 70.6 dBFS at 185 MHz AIN and 250 MSPS
SFDR = 85 dBc at 185 MHz AIN and 250 MSPS
151.6 dBFS/Hz input noise at 185 MHz, 1 dBFS AIN and
250 MSPS
Total power consumption: 785 mW at 250 MSPS
1.8 V supply voltages
LVDS (ANSI-644 levels) outputs
Integer 1-to-8 input clock divider (625 MHz maximum input)
Sample rates of up to 250 MSPS
IF sampling frequencies of up to 400 MHz
Internal ADC voltage reference
Flexible analog input range
1.4 V p-p to 2.0 V p-p (1.75 V p-p nominal)
ADC clock duty cycle stabilizer
95 dB channel isolation/crosstalk
Serial port control
Energy saving power-down modes
User-configurable, built-in self-test (BIST) capability
APPLICATIONS
Communications
Diversity radio systems
Multimode digital receivers (3G)
TD-SCDMA, WiMax, WCDMA, CDMA2000, GSM, EDGE, LTE
I/Q demodulation systems
Smart antenna systems
General-purpose software radios
Ultrasound equipment
Broadband data applications
FUNCTIONAL BLOCK DIAGRAM
14
REFERENCE
SERIAL PORT
SCLK
SDIO
CSB
CLK+
CLK–
SYNC
1TO 8
CLOCK
DIVIDER
AD9643
VIN+A
D0±
D13±
DCO±
OR±
PDWN
OEB
VIN–A
VIN+B
VCM
VIN–B
NOTES
1. THE D0± TO D13± PINS REPRESENT BOTH THE CHANNEL A
AND CHANNEL B LVDS OUTPUT DATA.
AVDD
AGND
DRVDD
096
36
-0
01
.
PARALLEL
DDR LVDS
AND
DRIVERS
PIPELINE
14-BIT
ADC
PIPELINE
14-BIT
ADC
Figure 1.
GENERAL DESCRIPTION
The AD9643 is a dual, 14-bit analog-to-digital converter (ADC)
with sampling speeds of up to 250 MSPS. The AD9643 is designed
to support communications applications, where low cost, small
size, wide bandwidth, and versatility are desired.
The dual ADC cores feature a multistage, differential pipelined
architecture with integrated output error correction logic. Each
ADC features wide bandwidth inputs supporting a variety of
user-selectable input ranges. An integrated voltage reference
eases design considerations. A duty cycle stabilizer is provided
to compensate for variations in the ADC clock duty cycle,
allowing the converters to maintain excellent performance.
The ADC output data is routed directly to the two external
14-bit LVDS output ports and formatted as either interleaved or
channel multiplexed.
Flexible power-down options allow significant power savings,
when desired.
Programming for setup and control are accomplished using a
3-wire SPI-compatible serial interface.
The AD9643 is available in a 64-lead LFCSP and is specified over
the industrial temperature range of 40°C to +85°C. This
product is protected by a U.S. patent.
PRODUCT HIGHLIGHTS
1. Integrated dual, 14-bit, 170 MSPS/210 MSPS/250 MSPS ADCs.
2. Operation from a single 1.8 V supply and a separate digital
output driver supply accommodating LVDS outputs.
3. Proprietary differential input maintains excellent SNR
performance for input frequencies of up to 400 MHz.
4. SYNC input allows synchronization of multiple devices.
5. 3-pin, 1.8 V SPI port for register programming and register
readback.
6. Pin compatibility with the AD9613, allowing a simple
migration down from 14 bits to 12 bits. This part is also pin
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