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AD5665-RBRUZ-2 Datasheet

  • AD5665-RBRUZ-2

  • Quad, 12-/14-/16-Bit nanoDACs with 5ppm/∑C On-chip Ref, I2C...

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Preliminary Technical Data
FEATURES
Quad, 12-/14-/16-Bit
nanoDACs
廬
with
5ppm/擄C On-chip Ref, I
2
C Interface
AD5625R/AD5645R/AD5665R
AD5625/AD5665
V
DD
GND
V
REFIN
/V
REFOUT
1.25V/2.5V REF
DAC
REGISTER
STRING
DAC A
Low power, smallest pin-compatible, quad
nanoDACs
AD5625R/AD5645R/AD5665R
12-/14-/16 bits
On-chip 1.25 V/2.5 V, 5 ppm/擄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
I
2
C-compatible serial interface supports standard (100 kHz),
fast (400 kHz), and high speed (3.4 MHz) modes
AD5625R/AD5645R/AD5665R
INPUT
REGISTER
ADDR1
ADDR2
SCL
INTERFACE
LOGIC
INPUT
REGISTER
SDA
INPUT
REGISTER
POWER-ON
RESET
LDAC
CLR
POR
DAC
REGISTER
STRING
DAC D
DAC
REGISTER
STRING
DAC C
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
V
OUTA
BUFFER
V
OUTB
BUFFER
V
OUTC
BUFFER
V
O UTD
POWER-DOWN
LOGIC
NOTE. THE FOLLOWING PINS ARE AVAILABLE ONLY ON 14-PIN PACKAGE - ADDR2, LDAC, CLR, POR.
V
REFIN
V
DD
GND
AD5625/AD5665
INPUT
REGISTER
ADDR1
DAC
REGISTER
STRING
DAC A
BUFFER
V
OUTA
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
ADDR2
SCL
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
V
OUTB
INPUT
REGISTER
SDA
INPUT
REGISTER
POWER-ON
RESET
LDAC
CLR
POR
DAC
REGISTER
STRING
DAC C
BUFFER
V
OUTC
DAC
REGISTER
STRING
DAC D
BUFFER
V
O UTD
POWER-DOWN
LOGIC
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 I
2
C-
compatible serial interface .
The AD5625R/AD5645R/AD5665R have an on-chip reference. The
AD56x5RBCPZ have a 1.25 V, 5 ppm/擄C reference, giving a full-scale
output range of 2.5 V; the AD56x5RBRUZ have a 2.5 V, 5 ppm/擄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
Rev. PrA
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.
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 I
2
C-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.
AD5624R/AD5644R/AD5664R
AD5624/AD5664
AD5627R/AD5647R/AD5667R
AD5627/5667,
AD5666
Description
Quad SPI 12-, 14-, 16-bit DACs,
with/without internal reference.
Dual I
2
C 12-, 14-,16-bit DACs,
with/without internal reference.
2.7 V to 5.5 V, Quad 16-bit DAC,
internal r
eference, SPI interface
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
漏2006 Analog Devices, Inc. All rights reserved.

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