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AD5620 Datasheet

  • AD5620

  • Single, 12-/14-/16-Bit nanoDAC with 5 ppm/C On-Chip Referenc...

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Single, 12-/14-/16-Bit
nanoDAC鈩?/div>
with
5 ppm/擄C On-Chip Reference in SOT-23
AD5620/AD5640/AD5660
FEATURES
Low power, single
nanoDACs
AD5660: 16 bits
AD5640: 14 bits
AD5620: 12 bits
12-bit accuracy guaranteed
On-chip, 1.25 V/2.5 V, 5 ppm/擄C reference
Tiny 8-lead SOT-23/MSOP packages
Power-down to 480 nA @ 5 V, 200 nA @ 3 V
3 V/5 V single power supply
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
SYNC interrupt facility
FUNCTIONAL BLOCK DIAGRAM
V
REFOUT
GND
V
DD
1.25/2.5V
REF
POWER-ON
RESET
AD5620/AD5640/AD5660
V
FB
DAC
REGISTER
REF(+)
16-BIT
DAC
OUTPUT
BUFFER
V
OUT
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
04539-001
SYNC
SCLK
DIN
Figure 1.
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 AD5620/AD5640/AD5660, members of the
nanoDAC
family of devices, are low power, single, 12-/14-/16-bit, buffered
voltage-out DACs and are guaranteed monotonic by design.
The AD5620/AD5640/AD5660-1 parts include an internal,
1.25 V, 5 ppm/擄C reference, giving a full-scale output voltage
range of 2.5 V. The AD5620/AD5640/AD5660-2-3 parts include
an internal, 2.5 V, 5 ppm/擄C reference, giving a full-scale output
voltage range of 5 V. The reference associated with each part is
available at the V
REFOUT
pin.
The parts incorporate a power-on reset circuit to ensure that the
DAC output powers up to 0 V (AD5620/AD5640/AD5660-1-2)
or midscale (AD5620-3 and AD5660-3) and remains there until
a valid write takes place. The parts contain a 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 power consumption is
2.5 mW at 5 V, reducing to 1 渭W in power-down mode.
The AD5620/AD5640/AD5660 on-chip precision output
amplifier allows rail-to-rail output swing to be achieved. For
remote sensing applications, the output amplifier鈥檚 inverting
input is available to the user. The AD5620/AD5640/AD5660 use
a versatile 3-wire serial interface that operates at clock rates up
to 30 MHz and is compatible with standard SPI廬, QSPI鈩?
MICROWIRE鈩? and DSP interface standards.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
12-/14-/16-bit
nanoDAC鈥?2-bit
accuracy guaranteed.
On-chip, 1.25 V/2.5 V, 5 ppm/擄C reference.
Available in 8-lead SOT-23 and 8-lead MSOP packages.
Power-on reset to 0 V or midscale.
10 渭s settling time.
RELATED DEVICE
Part No.
AD5662
Description
2.7 V to 5.5 V, 16-bit DAC in SOT-23, external
reference
Rev. A
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
www.analog.com
Fax: 781.461.3113
漏 2005 Analog Devices, Inc. All rights reserved.

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