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AD5663 функция - Dual 16-Bit nanoDAC - Analog Devices

Номер произв AD5663
Описание Dual 16-Bit nanoDAC
Производители Analog Devices 
логотип Analog Devices логотип 
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AD5663 Даташит, Описание, Даташиты
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2.7 V to 5.5 V, 250 μA, Rail-to-Rail Output,
Dual 16-Bit nanoDAC®
AD5663
FEATURES
Low power, dual 16-bit nanoDAC
Relative accuracy: ±12 LSBs maximum
Guaranteed monotonic by design
10-lead MSOP and 3 mm × 3 mm LFCSP_WD
2.7 V to 5.5 V power supply
Per channel power-down
Power-on reset to zero scale or midscale
Hardware LDAC and CLR functions
Serial interface; up to 50 MHz
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The AD5663, a member of the nanoDAC family, is a low power,
dual, 16-bit buffered voltage-out DAC that operates from a single
2.7 V to 5.5 V supply and is guaranteed monotonic by design.
The AD5663 requires an external reference voltage to set the
output range of the DAC. The part incorporates a power-on
reset circuit that ensures the DAC output powers up to 0 V or
midscale (AD5663-1) and remains there until a valid write takes
place. The part contains a power-down feature that reduces the
current consumption of the device to 480 nA at 5 V and provides
software-selectable output loads while in power-down mode.
The low power consumption of this part in normal operation
makes it ideally suited to portable, battery-operated equipment.
The power consumption is 1.25 mW at 5 V, going down to
2.4 μW in power-down mode.
The on-chip precision output amplifier of the AD5663 allows
rail-to-rail output swing to be achieved.
The AD5663 uses a versatile, 3-wire serial interface that
operates at clock rates up to 50 MHz and is compatible with
standard SPI®, QSPI™, MICROWIRE™, and DSP interface
standards.
SCLK
SYNC
DIN
FUNCTIONAL BLOCK DIAGRAM
VDD
VREF
LDAC
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
VOUTA
VOUTB
LDAC CLR
AD5663
POWER-ON
RESET
GND
Figure 1.
POWER-DOWN
LOGIC
Table 1. Related Devices
Part No.
AD5623R/AD5643R/AD5663R
Description
2.7 V to 5.5 V, dual 12-/14-/16-bit
DACs with internal reference
PRODUCT HIGHLIGHTS
1. Dual 16-bit DAC; relative accuracy of ±12 LSBs maximum.
2. Available in 10-lead MSOP and 10-lead, 3 mm × 3 mm
LFCSP_WD packages.
3. Low power; typically consumes 0.6 mW at 3 V and
1.25 mW at 5 V.
4. 7 μs maximum settling time.
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.
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
©2006 Analog Devices, Inc. All rights reserved.





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