AD5627R Datasheet, PDF (1/30 Pages) Analog Devices – Dual, 12-/14-/16-Bit nanoDACs with 5ppm/C On-Chip Ref, I2C Interface

Preliminary Technical Data
Dual, 12-/14-/16-Bit nanoDACs^® with
5ppm/°C On-Chip Ref, I²C 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
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
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
Rev. PrA
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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V_DD
AD5627R/AD5647R/AD5667R
GND
VREFIN/VREFOUT
1.25V/2.5V REF
ADDR
SCL
SDA
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
POWER-ON
RESET
POWER-DOWN
LOGIC
LDAC CLR
V_OUTA
V_OUTB
V_DD
AD5627/AD5667
GND
V_REFIN
ADDR
SCL
SDA
INTERFACE
LOGIC
LDAC CLR
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
V_OUTA
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
V_OUTB
POWER-ON
RESET
POWER-DOWN
LOGIC
Figure 1. Functional Block Diagrams
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.
AD5663
AD5623R/AD5643R/AD5663R
AD5625R/AD5645R/AD5665R
AD5625/AD5665
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, I²C interface
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