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Dual, 12-/14-/16-Bit nanoDACs
®
with
5 ppm/°C On-Chip Reference, I
2
C
®
Interface
Data Sheet
AD5627R/AD5647R/AD5667R, AD5627/AD5667
Rev. A Document Feedback
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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
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
FUNCTIONAL BLOCK DIAGRAMS
INTERFACE
LOGIC
SDA
SCL
ADDR
V
DD
GND
POWER-ON
RESET
1.25V/2.5V REF
V
REFIN
/V
REFOUT
AD5627R/AD5647R/AD5667R
POWER-DOWN
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
V
OUT
A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
V
OUT
B
LDAC CLR
BUFFER
06342-001
F
igure 1. AD5627R/AD5647R/AD5667R
INTERFACE
LOGIC
SDA
SCL
ADDR
V
DD
GND
POWER-ON
RESET
V
REFIN
AD5627/AD5667
POWER-DOWN
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
V
OUT
A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
V
OUT
B
LDAC CLR
BUFFER
06342-002
F
igure 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 digital-to-analog converters (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 AD5627RBCPZ, AD5647RBCPZ, and AD5667RBCPZ have a
1.25 V, 5 ppm/°C reference, giving a full-scale output range of 2.5 V;
the AD5627RBRMZ and AD5667RBRMZ 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 AD5627R/AD5647R/AD5667R, AD5627/AD5667
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 device 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 device 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 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
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, I
2
C interface
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