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AD5662BRJ-2 Datasheet

  • AD5662BRJ-2

  • 2.7 V to 5.5 V, 250 ??A, Rail-to-Rail Output 16-Bit DAC D/A ...

  • 20頁

  • AD

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Preliminary Technical Data
FEATURES
Low power (250 碌A(chǔ) @ 5 V) single 16-bit
nanoDAC
True 12-bit accuracy guaranteed
Tiny 8-lead SOT-23/MSOP package
Power-down to 200 nA @ 5 V, 50 nA @ 3 V
Power-on-reset to zero/midscale
2.7 V to 5.5 V power supply
Guaranteed 16-bit monotonic by design
3 power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
SYNC interrupt facility
TM
2.7 V to 5.5 V, 250 碌A(chǔ), Rail-to-Rail Output
16-Bit
nanoDAC
TM
D/A in a SOT-23
AD5662
FUNCTIONAL BLOCK DIAGRAM
V
REF
GND
V
DD
POWER-ON
RESET
AD5662
V
FB
REF(+)
16-BIT
DAC
DAC
REGISTER
OUTPUT
BUFFER
V
OUT
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
04777-0-001
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
SYNC
SCLK
DIN
Figure 1.
GENERAL DESCRIPTION
The AD5662 parts are a member of the
nanoDAC
TM
family of
devices. They are low power, single, 16-bit buffered voltage-out
DACs. All devices operate from a single 2.7 V to 5.5 V, and are
guaranteed monotonic by design.
The AD5662 requires 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
(AD5662x-1) or midscale (AD5662x-2), 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.
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 碌W in
power-down mode.
The AD5662鈥檚 on-chip precision output amplifier allows rail-to-
rail output swing to be achieved. The AD5662 utilizes a versatile
3-wire serial interface that operates at clock rates up to 30 MHz,
and is compatible with standard SPI鈩? QSPI鈩? MICROWIRE鈩?
and DSP interface standards.
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.
The AD5662 is designed with new technology, and is the next
generation to the AD53xx family.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
16-bit DAC; true 12-bit accuracy guaranteed.
Available in 8-lead SOT-23 and 8-lead MSOP package.
Power-on-reset to zero or midscale.
Low power. Operates with 2.7 V to 5.5 V supply. Typically
consumes 0.35 mW at 3 V and 0.7 mW at 5 V, making it
ideal for battery-powered applications.
Power-down capability. When powered down, the DAC
typically consumes 50 nA at 3 V and 200 nA at 5 V.
10 碌s settling time.
Description
3 V/5 V 12-/14-/16-bit DAC with
internal ref in Sot-23
5.
6.
RELATED DEVICES
Part No.
AD5620/AD5640/AD5660
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
漏 2004 Analog Devices, Inc. All rights reserved.

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