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AD9481 Datasheet

  • AD9481

  • 8-Bit, 250 MSPS 3.3 V A/D Converter

  • 29頁(yè)

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8-Bit, 250 MSPS
3.3 V A/D Converter
AD9481
FEATURES
DNL = 鹵0.35 LSB
INL = 鹵0.26 LSB
Single 3.3 V supply operation (3.0 V to 3.6 V)
Power dissipation of 439 mW at 250 MSPS
1 V p-p analog input range
Internal 1.0 V reference
Single-ended or differential analog inputs
De-multiplexed CMOS outputs
Power-down mode
Clock duty cycle stabilizer
FUNCTIONAL BLOCK DIAGRAM
VREF SENSE
AGND DRGND
DRVDD
AVDD
REFERENCE
AD9481
PORT
A
8
D7A TO D0A
VIN+
VIN鈥?/div>
DS+
DS鈥?/div>
CLK+
CLK鈥?/div>
T AND H
8-BIT
ADC
PIPELINE
CORE
8
PORT
B
8
D7B TO D0B
CLOCK
MGMT
DCO+
DCO鈥?/div>
LOGIC
05045-001
APPLICATIONS
Digital oscilloscopes
Instrumentation and measurement
Communications
Point-to-point radios
Digital predistortion loops
PDWN
S1
Figure 1.
GENERAL DESCRIPTION
The AD9481 is an 8-bit, monolithic analog-to-digital converter
(ADC) optimized for high speed and low power consumption.
Small in size and easy to use, the product operates at a
250 MSPS conversion rate, with excellent linearity and dynamic
performance over its full operating range.
To minimize system cost and power dissipation, the AD9481
includes an internal reference and track-and-hold circuit. The
user only provides a 3.3 V power supply and a differential
encode clock. No external reference or driver components are
required for many applications.
The digital outputs are TTL/CMOS-compatible with an option
of twos complement or binary output format. The output data
bits are provided in an interleaved fashion along with output
clocks that simplifies data capture.
The AD9481 is available in a Pb-free, 44-lead, surface-mount
package (TQFP-44) specified over the industrial temperature
range (鈭?0擄C to +85擄C).
PRODUCT HIGHLIGHTS
1. Superior linearity. A DNL of 鹵0.35 makes the AD9481
suitable for many instrumentation and measurement
applications
2. Power-down mode. A power-down function may be exercised
to bring total consumption down to 15 mW.
3. De-multiplexed CMOS outputs allow for easy interfacing
with low cost FPGAs and standard logic.
Rev. 0
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: 781.329.4700
www.analog.com
Fax: 781.326.8703
漏 2004 Analog Devices, Inc. All rights reserved.

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