Dual, 12-/14-/16-Bit
nanoDACs
®
with
5 ppm/°C On-Chip Reference, I
2
C
®
Interface
AD5627R/AD5647R/AD5667R, AD5627/AD5667
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
AD5627/AD5667
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
Hardware LDAC and CLR functions
I
2
C-compatible serial interface supports standard (100 kHz),
fast (400 kHz), and high speed (3.4 MHz) modes
FUNCTIONAL BLOCK DIAGRAMS
V
DD
GND
V
REFIN
/V
REFOUT
1.25V/2.5V REF
BUFFER
AD5627R/AD5647R/AD5667R
ADDR
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
SCL
INTERFACE
LOGIC
V
OUT
A
BUFFER
SDA
INPUT
REGISTER
POWER-ON
RESET
DAC
REGISTER
STRING
DAC B
POWER-DOWN
LOGIC
V
OUT
B
LDAC CLR
Figure 1. AD5627R/AD5647R/AD5667R
V
DD
GND
V
REFIN
AD5627/AD5667
ADDR
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
POWER-ON
RESET
DAC
REGISTER
STRING
DAC B
POWER-DOWN
LOGIC
06342-002
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
SCL
INTERFACE
LOGIC
V
OUT
A
V
OUT
B
SDA
LDAC CLR
Figure 2. AD5627/AD5667
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 I
2
C-
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 AD56x7RBRMZ 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 AD56x7R/AD56x7 incorporate 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
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.
Trademarks and registered trademarks are the property of their respective owners.
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 AD56x7R/AD56x7 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.
Description
2.7 V to 5.5 V, dual 16-bit DAC,
external reference, SPI® interface
2.7 V to 5.5 V, dual 12-, 14-, 16-bit
DACs, internal reference,
SPI interface
2.7 V to 5.5 V, quad 12-, 14-, 16-bit
DACs, with/without internal
reference, I
2
C 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
©2007 Analog Devices, Inc. All rights reserved.
06342-001
AD [ ANALOG DEVICES ]
