Octal, 12-/16-Bit DAC, I2C®, 5ppm/°C On-
Chip Reference in 4mm X 4mm LFCSP
AD5629R/AD5669R
Preliminary Technical Data
(AD5669R-3) and remains powered up at this level until a valid
write takes place. The part contains a power-down feature that
reduces the current consumption of the device to 400 nA at 5 V
and provides software-selectable output loads while in power-
down mode for any or all DAC channels.
FEATURES
Low power, smallest-pin-compatible octal DACs
AD5669R: 16 bits
AD5629R: 12 bits
4mm X 4mm 16-lead LFCSP and 16-lead TSSOP
User selectable on-chip 1.25 V/2.5 V, 5 ppm/°C reference
Power down to 400 nA @ 5 V, 200 nA @ 3 V
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to zero scale or midscale
3 power-down functions
FUNCTIONAL BLOCK DIAGRAM
V
/V
V
REFIN REFO UT
DD
AD5629R/AD5669R
LDAC
1.25V/2.5V
REF
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
DAC
REGISTER
STRING
DAC
INPUT
REGISTER
V
V
V
V
V
V
V
V
A
B
C
D
E
F
O UT
O UT
O UT
O UT
O UT
O UT
O UT
O UT
A
INPUT
REGISTER
DAC
REGISTER
STRING
DAC
B
Hardware LDAC and CLR functions
I2C-compatible serial interface supports standard (100 kHz)
and fast (400 kHz) modes
INPUT
DAC
STRING
DAC
SCL
SDA
A0
REGISTER
REGISTER
C
INTERFACE
LOG IC
DAC
REGISTER
STRING
DAC
INPUT
REGISTER
D
INPUT
REGISTER
DAC
REGISTER
STRING
DAC
E
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
DAC
REGISTER
STRING
DAC
INPUT
REGISTER
F
DAC
REGISTER
STRING
DAC
INPUT
REGISTER
G
H
G
INPUT
REGISTER
DAC
REGISTER
STRING
DAC
H
PO W ER-DOW N
POW ER-ON
RESET
LOGIC
GND
LDAC CLR
Figure 1
GENERAL DESCRIPTION
The AD5629R/AD5669R devices are low power, octal, 12-/16-
bit, buffered voltage-output DACs. All devices operate from a
single 2.7 V to 5.5 V supply and are guaranteed monotonic by
design.
The AD5629R/AD5669R has an on-chip reference with an
internal gain of 2. The AD5629R/AD5669R has a user selectable
1.25 V 5 ppm/°C reference, giving a full-scale output range of
2.5 V or a 2.5 V 5 ppm/°C reference, giving a full-scale output
range of 5 V depending on the option selected. The on-chip
reference is off at power-up, allowing the use of an external refer-
ence. The internal reference is enabled via a software write. The
AD5669/AD5629 require an external reference voltage to set
the output range of the DAC.
PRODUCT HIGHLIGHTS
1. Octal, 12-/16-bit DAC.
2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference.
3. Available in 16-lead LFCSP/16-lead TSSOP.
4. Power-on reset to 0 V or midscale.
5. Power-down capability. When powered down, the DAC
typically consumes 200 nA at 3 V and 400 nA at 5 V.
The part incorporates a power-on reset circuit that ensures that the
DAC output powers up to 0 V (AD5629R/AD5669R) or midscale
Rev. PrA
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