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AD5647RBCPZ-250RL7 Folha de dados(PDF) 1 Page - Analog Devices

Nome de Peças AD5647RBCPZ-250RL7
Descrição Electrónicos  Dual, 12-/14-/16-Bit nanoDACs with 5ppm/C On-Chip Ref, I2C Interface
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

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Dual, 12-/14-/16-Bit nanoDACs® with
5ppm/°C On-Chip Ref, I2C Interface
Preliminary Technical Data
AD5627R/AD5647R/AD5667R
AD5627/AD5667
Rev. PrA
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
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Low power, smallest pin-compatible, dual nanoDACs
AD5627R/AD5647R/AD5667R
12-/14-/16- bit
On-chip 1.25 V/2.5 V, 5 ppm/°C reference
AD5625/AD5665
12-/16- bit
External reference only
3 mm x 3 mm LFCSP and 10-lead MSOP
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to zero scale
Per channel power-down
I2C-compatible serial interface supports standard (100 kHz),
fast (400 kHz), and high speed (3.4 MHz) modes
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
ADDR
SCL
SDA
INPUT
REGISTER
INPUT
REGISTER
DAC
REGISTER
DAC
REGISTER
BUFFER
BUFFER
VOUTA
VOUTB
VDD
GND
VREFIN/VREFOUT
AD5627R/AD5647R/AD5667R
POWER-DOWN
LOGIC
STRING
DAC B
STRING
DAC A
LDAC
CLR
POWER-ON
RESET
INTERFACE
LOGIC
1.25V/2.5V REF
ADDR
SCL
SDA
INPUT
REGISTER
INPUT
REGISTER
DAC
REGISTER
DAC
REGISTER
BUFFER
BUFFER
VOUTA
VOUTB
VDD
GND
VREFIN
AD5627/AD5667
POWER-DOWN
LOGIC
STRING
DAC B
STRING
DAC A
LDAC
CLR
POWER-ON
RESET
INTERFACE
LOGIC
Figure 1. Functional Block Diagrams
GENERAL DESCRIPTION
The AD5627R/AD5647R/AD5667R, AD5627/AD5667,
members of the nanoDAC family, are low power, dual, 12-, 14-,
16-bit buffered voltage-out DACs with/without on-chip
reference. All devices operate from a single 2.7 V to 5.5 V
supply, are guaranteed monotonic by design and have an I2C-
compatible serial interface .
The AD5627R/AD5647R/AD5667R have an on-chip reference. The
AD56x7RBCPZ have a 1.25 V, 5 ppm/°C reference, giving a full-scale
output range of 2.5 V; the AD56x7RBRUZ have a 2.5 V, 5 ppm/°C
reference giving a full-scale output range of 5 V. The on-chip
reference is off at power-up, allowing the use of an external reference.
The internal reference is enabled via a software write. The AD5667
and AD5627 require 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 and remains there until a valid
write takes place. The part contains a per-channel 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 on-chip precision output
amplifier enables rail-to-rail output swing.
The AD5627R/AD5647R/AD5667R, AD5627/AD5667 use a 2-
wire I2C-compatible serial interface that operates in standard
(100 kHz), fast (400 kHz), and high speed (3.4 MHz) modes.
Table 1. Related Devices
Part No.
Description
AD5663
2.7 V to 5.5 V, Dual 16-bit DAC,
external reference, SPI interface
AD5623R/AD5643R/AD5663R
2.7 V to 5.5 V, Dual 12-, 14-, 16-
bit DACs, internal reference, SPI
interface
AD5625R/AD5645R/AD5665R
AD5625/AD5665
2.7 V to 5.5 V, quad 12-, 14- 16-
bit DACs, with/without internal
reference, I2C interface


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