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AD5625RBCPZ-250RL7 Scheda tecnica(PDF) 1 Page - Analog Devices

Il numero della parte AD5625RBCPZ-250RL7
Spiegazioni elettronici  Quad, 12-/14-/16-Bit nanoDACs with 5ppm/째C On-chip Ref, I2C Interface
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
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Quad, 12-/14-/16-Bit nanoDACs® with
5ppm/°C On-chip Ref, I2C Interface
Preliminary Technical Data
AD5625R/AD5645R/AD5665R
AD5625/AD5665
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, quad nanoDACs
AD5625R/AD5645R/AD5665R
12-/14-/16 bits
On-chip 1.25 V/2.5 V, 5 ppm/°C reference.
AD5625/AD5665
12-/16 bits
External reference only
3 mm x 3 mm LFCSP and 14-lead TSSOP
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to zero scale/midscale
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
ADDR1
SCL
SDA
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
BUFFER
BUFFER
BUFFER
BUFFER
VOUTA
VOUTB
VOUTC
VOUTD
1.25V/2.5V REF
VDD
GND
VREFIN/VREFOUT
AD5625R/AD5645R/AD5665R
POWER-DOWN
LOGIC
STRING
DAC D
STRING
DAC C
STRING
DAC B
STRING
DAC A
INTERFACE
LOGIC
LDAC
CLR
POR
POWER-ON
RESET
ADDR2
NOTE. THE FOLLOWING PINS ARE AVAILABLE ONLY ON 14-PIN PACKAGE - ADDR2, LDAC, CLR, POR.
ADDR1
SCL
SDA
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
BUFFER
BUFFER
BUFFER
BUFFER
VOUTA
VOUTB
VOUTC
VOUTD
VDD
GND
VREFIN
AD5625/AD5665
POWER-DOWN
LOGIC
STRING
DAC D
STRING
DAC C
STRING
DAC B
STRING
DAC A
INTERFACE
LOGIC
LDAC
CLR
POR
POWER-ON
RESET
ADDR2
NOTE. THE FOLLOWING PINS ARE AVAILABLE ONLY ON 14-PIN PACKAGE - ADDR2, LDAC, CLR, POR.
Figure 1. Functional Block Diagrams
GENERAL DESCRIPTION
The AD5625R/AD5645R/AD5665R, AD5625/AD5665
members of the nanoDAC family, are low power, quad, 12-, 14-,
16-bit buffered voltage-out DACs with/without an 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 AD5625R/AD5645R/AD5665R have an on-chip reference. The
AD56x5RBCPZ have a 1.25 V, 5 ppm/°C reference, giving a full-scale
output range of 2.5 V; the AD56x5RBRUZ 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 AD5665
and AD5625 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 or midscale 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 AD5625R/AD5645R/AD5665R, AD5625/AD5665 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
AD5624R/AD5644R/AD5664R
AD5624/AD5664
Quad SPI 12-, 14-, 16-bit DACs,
with/without internal reference.
AD5627R/AD5647R/AD5667R
AD5627/5667,
Dual I2C 12-, 14-,16-bit DACs,
with/without internal reference.
AD5666
2.7 V to 5.5 V, Quad 16-bit DAC,
internal r
eference, SPI interface


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