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DAC9881SBRGER 数据表(PDF) 1 Page - Texas Instruments

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部件名 DAC9881SBRGER
功能描述  18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

DAC9881SBRGER 数据表(HTML) 1 Page - Texas Instruments

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DAC9881
1
FEATURES
DESCRIPTION
APPLICATIONS
R
FB
(1)
Control
Logic
DGND
IOV
DD
AGND
AV
DD
V
-S
REFH
V
-F
REFH
RST
RSTSEL
USB/BTC
GAIN
SDI
CS
SCLK
Input
Register
DAC
Latch
LDAC
V
-S
REFL
V
-F
REFL
Resistor
Network
DAC
NOTE:(1) R
=5k
forgain=1,
W
FB
R
=10k
forgain=2.
W
FB
DAC9881
SerialOut
Control
SDOSEL
SDO
Power-On
Reset
PDN
V
OUT
R
FB
DAC9881
www.ti.com ......................................................................................................................................................... SBAS438A – MAY 2008 – REVISED AUGUST 2008
18-Bit, Single-Channel, Low-Noise, Voltage-Output
DIGITAL-TO-ANALOG CONVERTER
234
• 18-Bit Monotonic Over Temperature Range
The
DAC9881
is
an
18-bit,
single-channel,
voltage-output digital-to-analog converter (DAC). It
• Relative Accuracy: ±2LSB Max
features 18-bit monotonicity, excellent linearity, very
• Low-Noise: 24nV/√Hz
low-noise,
and
fast
settling
time.
The
on-chip
• Fast Settling: 5µs
precision output amplifier allows rail-to-rail output
• On-Chip Output Buffer Amplifier with
swing to be achieved over the full supply range of
2.7V to 5.5V.
Rail-to-Rail Operation
• Single Power Supply: +2.7V to +5.5V
The device supports a standard SPI serial interface
capable of operating with input data clock frequencies
• DAC Loading Control
up to 50MHz. The DAC9881 requires an external
• Selectable Power-On Reset to Zero-Scale or
reference voltage to set the output range of the DAC
Midscale
channel. A programmable power-on reset circuit is
• Power-Down Mode
also incorporated into the device to ensure that the
DAC output powers up at zero-scale or midscale, and
• Unipolar Straight Binary or
remains there until a valid write command.
Twos Complement Input Mode
Additionally, the DAC9881 has the capability to
• Fast SPI™ Interface with Schmitt-Triggered
function in either unipolar straight binary or twos
Inputs: up to 50MHz, 1.8V/3V/5V Logic
complement
mode.
The
DAC9881
provides
• Small Package: QFN-24, 4mm × 4mm
low-power
operation.
To
further
save
energy,
power-down mode can be achieved by accessing the
PDN pin, thereby reducing the current consumption to
• Automatic Test Equipment
25
µA at 5V. Power consumption is 4mW at 5V,
reducing to 125
µW in power-down mode.
• Precision Instrumentation
• Industrial Control
The DAC9881 is available in a 4mm × 4mm QFN-24
• Data Acquisition Systems
package with a specified temperature range of –40°C
to +105°C.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
SPI, QSPI are trademarks of Motorola, Inc.
3
MICROWIRE is a trademark of National Semiconductor.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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