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DAC7554 Datasheet

  • DAC7554

  • 12-BIT, QUAD, ULTRALOW GLITCH, VOLTAGE OUTPUT DIGITAL-TO-ANA...

  • 1067.75KB

  • 21頁

  • TI

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DAC7554
www.ti.com
SLAS399A 鈥?OCTOBER 2004 鈥?REVISED NOVEMBER 2004
12-BIT, QUAD, ULTRALOW GLITCH, VOLTAGE OUTPUT
DIGITAL-TO-ANALOG CONVERTER
FEATURES
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2.7-V to 5.5-V Single Supply
12-Bit Linearity and Monotonicity
Rail-to-Rail Voltage Output
Settling Time: 5 碌s (Max)
Ultralow Glitch Energy: 0.1 nVs
Ultralow Crosstalk: 鈥?00 dB
Low Power: 880 碌A (Max)
Per-Channel Power Down: 2 碌A (Max)
Power-On Reset to Zero Scale
SPI-Compatible Serial Interface: Up to 50 MHz
Simultaneous or Sequential Update
Specified Temperature Range: 鈥?0擄C to 105擄C
Small 10-Lead MSOP Package
DESCRIPTION
The DAC7554 is a quad-channel, voltage-output DAC
with exceptional linearity and monotonicity. Its pro-
prietary architecture minimizes undesired transients
such as code to code glitch and channel to channel
crosstalk. The low-power DAC7554 operates from a
single 2.7-V to 5.5-V supply. The DAC7554 output
amplifiers can drive a 2-k鈩? 200-pF load rail-to-rail
with 5-碌s settling time; the output range is set using
an external voltage reference.
The 3-wire serial interface operates at clock rates up
to 50 MHz and is compatible with SPI, QSPI,
Microwire, and DSP interface standards. The outputs
of all DACs may be updated simultaneously or
sequentially. The parts incorporate a power-on-reset
circuit to ensure that the DAC outputs power up to
zero volts and remain there until a valid write cycle to
the device takes place. The parts contain a
power-down feature that reduces the current con-
sumption of the device to under 1 碌A.
The small size and low-power operation makes the
DAC7554 ideally suited for battery-operated portable
applications. The power consumption is typically 3.5
mW at 5 V, 1.65 mW at 3 V, and reduces to 1 碌W in
power-down mode.
The DAC7554 is available in a 10-lead MSOP pack-
age and is specified over 鈥?0擄C to 105擄C.
FUNCTIONAL BLOCK DIAGRAM
V
DD
REFIN
APPLICATIONS
Portable Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Programmable Attenuators
Industrial Process Control
Input
Register
DAC
Register
String
DAC A
Buffer
V
OUT
A
SCLK
SYNC
Interface
Logic
Input
Register
DAC
Register
String
DAC B
Buffer
V
OUT
B
DIN
Input
Register
DAC
Register
String
DAC C
Buffer
V
OUT
C
Input
Register
Power-On
Reset
DAC
Register
String
DAC D
Power-Down
Logic
Buffer
V
OUT
D
DAC7554
GND
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2004, Texas Instruments Incorporated

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