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AD5425 Función - High Bandwidth Multiplying DAC - Analog Devices

Número de pieza AD5425
Descripción High Bandwidth Multiplying DAC
Fabricantes Analog Devices 
Logotipo Analog Devices Logotipo
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AD5425 Hoja de datos, Descripción, Manual
Data Sheet
8-Bit, High Bandwidth
Multiplying DAC with Serial Interface
AD5425
FEATURES
GENERAL DESCRIPTION
2.5 V to 5.5 V supply operation
50 MHz serial interface
2.47 MSPS update rate
INL of ±0.25 LSB
10 MHz multiplying bandwidth
±10 V reference input
Low glitch energy: <2 nV-s
Extended temperature range: −40°C to +125°C
10-lead MSOP package
Guaranteed monotonic
4-quadrant multiplication
Power-on reset with brownout detection
LDAC function
The AD54251 is a CMOS, 8-bit, current output digital-to-analog
converter that operates from a 2.5 V to 5.5 V power supply,
making it suitable for battery-powered applications and many
other applications.
This DAC utilizes a double buffered, 3-wire serial interface that
is compatible with SPI®, QSPI, MICROWIRE, and most DSP
interface standards. An LDAC pin is also provided, which
allows simultaneous updates in a multi-DAC configuration. On
power-up, the internal shift register and latches are filled with
0s and the DAC outputs are 0 V.
As a result of manufacturing on a CMOS submicron process,
0.4 µA typical power consumption
this DAC offers excellent 4-quadrant multiplication charac-
teristics with large signal multiplying bandwidths of 10 MHz.
APPLICATIONS
Portable battery-powered applications
Waveform generators
Analog processing
Instrumentation applications
Programmable amplifiers and attenuators
The applied external reference input voltage (VREF) determines
the full-scale output current. An integrated feedback resistor,
RFB, provides temperature tracking and full-scale voltage output
when combined with an external I-to-V precision amplifier.
The AD5425 is available in a small, 10-lead MSOP package.
Digitally controlled calibration
Programmable filters and oscillators
Composite video
Ultrasound
Gain, offset, and voltage trimming
FUNCTIONAL BLOCK DIAGRAM
VDD
VREF
AD5425
8-BIT
R-2R DAC
R
RFB
IOUT1
IOUT2
LDAC
POWER-ON
RESET
DAC REGISTER
INPUT LATCH
SYNC
SCLK
SDIN
CONTROL LOGIC AND
INPUT SHIFT REGISTER
GND
Figure 1.
1 U.S. Patent No. 5,969,657.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
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 ©2004–2012 Analog Devices, Inc. All rights reserved.
Free Datasheet http://www.datasheet4u.com/





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