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AD5641 Datasheet

  • AD5641

  • 2.7 V to 5.5 V, <100 uA, 14-Bit nanoDAC D/A in SC70 Package

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2.7 V to 5.5 V, <100 碌A(chǔ), 14-Bit
nanoDAC鈩?/div>
D/A in SC70 Package
Preliminary Technical Data
FEATURES
6-lead SC70 package
Power-down to <100 nA @ 3 V
Single 14-bit DAC:
B Version: 鹵4 LSB INL
A Version: 鹵8 LSB INL
Micropower operation: max 100 碌A(chǔ) @ 5 V
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to 0 V with brownout detection
3 power-down functions
Low power serial interface with Schmitt-triggered inputs
On-chip output buffer amplifier, rail-to-rail operation
SYNC interrupt facility
V
DD
GND
AD5641
FUNCTIONAL BLOCK DIAGRAM
POWER-ON
RESET
AD5641
DAC
REGISTER
REF(+)
14-BIT
DAC
OUTPUT
BUFFER
V
OUT
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
04611-A-001
APPLICATIONS
Voltage level setting
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
SYNC
SCLK
DIN
Figure 1.
Table 1. Related Devices
Part Number
AD5601/AD5611/AD5621
Description
2.7 V to 5.5 V, <100 碌A(chǔ), 8-/10-/12-Bit,
nanoDAC鈩?/div>
D/A, SPI Interface, SC70
Package
GENERAL DESCRIPTION
The AD5641, a member of the
nanoDAC
family, is a single,
14-bit, buffered, voltage out DAC that operates from a single
2.7 V to 5.5 V supply, consuming <100 碌A(chǔ) at 5 V. The part
comes in a tiny SC70 package. Its on-chip precision output
amplifier allows rail-to-rail output swing to be achieved. The
AD5641 utilizes a versatile 3-wire serial interface that operates
at clock rates up to 30 MHz and is compatible with SPI廬, QSPI鈩?
MICROWIRE鈩? and DSP interface standards. The reference for
AD5641 is derived from the power supply inputs and, therefore,
gives the widest dynamic output range. The part incorporates a
power-on reset circuit, which ensures that the DAC output
powers up to 0 V and remains there until a valid write to the
device takes place.
The AD5641 contains a power-down feature that reduces
current consumption to <100 nA at 3 V, and provides software-
selectable output loads while in power-down mode. The part is
put into power-down mode over the serial interface. The low
power consumption of the part in normal operation makes it
ideally suited to portable battery-operated equipment. The
combination of small package and low power makes this
nanoDAC
device ideal for level-setting requirements such as
generating bias or control voltages in space-constrained and
power-sensitive applications.
Rev. PrC
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 AD5641 is designed with new technology and comes in a
space-saving SC70 package.
PRODUCT HIGHLIGHTS
1.
2.
Available in a space-saving 6-lead SC70 package.
Low power, single-supply operation. The AD5641 operates
from a single 2.7 V to 5.5 V supply and typically consumes
0.2 mW at 3 V and 0.5 mW at 5 V, making it ideal for
battery-powered applications.
The on-chip output buffer amplifier allows the output of
the DAC to swing rail-to-rail with a typical slew rate of
0.5 V/碌s.
Reference derived from the power supply.
High speed serial interface with clock speeds up to
30 MHz.
Designed for very low power consumption. The interface
powers up only during a write cycle.
Power-down capability. When powered down, the DAC
typically consumes <100 nA at 3 V.
Power-on reset with brownout detection.
3.
4.
5.
6.
7.
8.
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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