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AD9635 Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD9635
Szczegółowy opis  Dual, 12-Bit, 80 MSPS/125 MSPS, Serial LVDS 1.8 V Analog-to-Digital Converter
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Strona internetowa  http://www.analog.com
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Dual, 12-Bit, 80 MSPS/125 MSPS, Serial LVDS
1.8 V Analog-to-Digital Converter
Data Sheet
AD9635
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
©2012–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
1.8 V supply operation
Low power: 115 mW per channel at 125 MSPS with scalable
power options
SNR = 71 dBFS (to Nyquist)
SFDR = 93 dBc at 70 MHz
DNL = −0.1 LSB to +0.2 LSB (typical); INL = ±0.4 LSB (typical)
Serial LVDS (ANSI-644, default) and low power, reduced
range option (similar to IEEE 1596.3)
650 MHz full power analog bandwidth
2 V p-p input voltage range
Serial port control
Full chip and individual channel power-down modes
Flexible bit orientation
Built-in and custom digital test pattern generation
Clock divider
Programmable output clock and data alignment
Programmable output resolution
Standby mode
APPLICATIONS
Communications
Diversity radio systems
Multimode digital receivers
GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA
I/Q demodulation systems
Smart antenna systems
Broadband data applications
Battery-powered instruments
Handheld scope meters
Portable medical imaging and ultrasound
Radar/LIDAR
GENERAL DESCRIPTION
The AD9635 is a dual, 12-bit, 80 MSPS/125 MSPS analog-to-
digital converter (ADC) with an on-chip sample-and-hold circuit
designed for low cost, low power, small size, and ease of use.
The product operates at a conversion rate of up to 125 MSPS
and is optimized for outstanding dynamic performance and low
power in applications where a small package size is critical.
The ADC requires a single 1.8 V power supply and LVPECL-/
CMOS-/LVDS-compatible sample rate clock for full performance
operation. No external reference or driver components are
required for many applications.
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
The ADC automatically multiplies the sample rate clock for the
appropriate LVDS serial data rate. A data clock output (DCO) for
capturing data on the output and a frame clock output (FCO) for
signaling a new output byte are provided. Individual channel
power-down is supported; the AD9635 typically consumes less
than 2 mW in the full power-down state. The ADC provides
several features designed to maximize flexibility and minimize
system cost, such as programmable output clock and data align-
ment and digital test pattern generation. The available digital
test patterns include built-in deterministic and pseudorandom
patterns, along with custom user-defined test patterns entered via
the serial port interface (SPI).
The AD9635 is available in a RoHS-compliant, 32-lead LFCSP.
It is specified over the industrial temperature range of −40°C
to +85°C.
PRODUCT HIGHLIGHTS
1. Small Footprint. Two ADCs are contained in a small, space-
saving package.
2. Low Power. The AD9635 uses 115 mW/channel at 125 MSPS
with scalable power options.
3. Pin Compatibility with the AD9645, a 14-Bit Dual ADC.
4. Ease of Use. A data clock output (DCO) operates at
frequencies of up to 500 MHz and supports double data
rate (DDR) operation.
5. User Flexibility. SPI control offers a wide range of flexible
features to meet specific system requirements.
REFERENCE
AD9635
12
VINA+
AVDD
DRVDD
12
12
VINB+
VINB–
D0A+
12
D0B+
VINA–
VCM
D1A+
D1B+
AGND
D0A–
D1A–
D0B–
D1B–
DCO+
DCO–
FCO+
FCO–
12-BIT PIPELINE
ADC
12-BIT PIPELINE
ADC
SERIAL PORT
INTERFACE
1 TO 8
CLOCK DIVIDER
SCLK/
DFS
SDIO/
PDWN
CSB
CLK+ CLK–


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