3 V/5 V, 12/14-Bit nanoDACTM D/A with
10 ppm/°C Max On-Chip Reference in SOT-23
AD5620/AD5640
Preliminary Technical Data
FEATURES
AD5620: low power single 12-bit nanoDAC
FUNCTIONAL BLOCK DIAGRAM
V
V
REFOUT
DD
GND
AD5640: low power single 16-bit nanoDAC
12-bit accuracy guaranteed
1.25/2.5V
REF
POWER-ON
RESET
AD5620/AD5640
On-chip 1.25 V/2.5 V, 10 ppm/°C reference
Tiny 8-lead SOT-23/MSOP package
Power-down to 200 nA @ 5 V, 50 nA @ 3 V
3 V/5 V single power supply
V
FB
REF(+)
DAC
DAC
REGISTER
OUTPUT
BUFFER
V
OUT
Guaranteed 16-bit monotonic by design
Power-on reset to zero/midscale
3 power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
SYNC interrupt facility
SYNC SCLK DIN
APPLICATIONS
Process control
Data acquisition systems
Figure 1.
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The low power consumption of this part in normal operation
makes it ideally suited to portable battery-operated equipment.
The power consumption is 0.7 mW at 5 V, reducing to 1 µW in
power-down mode.
The AD5620/40 parts are a member of the nanoDAC family of
devices. They are low power, single, 12-/14-bit buffered voltage-
out DACs, guaranteed monotonic by design. The AD5620/40x-1
operate from a 3 V single supply featuring an internal reference
of 1.25 V and an internal gain of 2. The AD5620/40x-2/3 operate
from a 5 V single supply featuring an internal reference of 2.5 V
and an internal gain of 2. Each reference has a 10 ppm/°C max
temperature coefficient. The reference associated with each part
is available at the REFOUT pin.
The AD5620/40 is designed with new technology and is the
next generation to the AD53xx family.
RELATED DEVICES
Part No. Description
AD5660 3 V/5 V 16-bit DAC in SOT-23, internal reference
AD5662 2.7 V to 5.5 V 16-bit DAC in SOT-23, external reference
The part incorporates a power-on reset circuit, which ensures
that the DAC output powers up to 0 V (AD5620/40x-1/2) or to
midscale (AD5620/40x-3) and remains there until a valid write
takes place. The part contains a power-down feature that reduces
the current consumption of the device to 200 nA at 5 V and
provides software selectable output loads while in power-down
mode.
PRODUCT HIGHLIGHTS
1. 16-bit DAC; 12-bit accuracy guaranteed.
2. On-chip 1.25 V/2.5 V, 10 ppm/°C max reference.
3. Available in 8-lead SOT-23 and 8-lead MSOP packages.
4. Power-on reset to 0 V or midscale.
5. Power-down capability. When powered down, the DAC
typically consumes 50 nA at 3 V and 200 nA at 5 V.
6. 10 µS settling time.
The AD5620/40 uses a versatile 3-wire serial interface that
operates at clock rates up to 30 MHz and is compatible with
standard SPI™, QSPI™, MICROWIRE™, and DSP interface
standards. Its on-chip precision output amplifier allows rail-to-
rail output swing to be achieved.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
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