DAC7554IDGSRG4 Datasheet, PDF (1/24 Pages) Texas Instruments – 12-BIT, QUAD, ULTRALOW GLITCH, VOLTAGE OUTPUT DIGITAL-TO-ANALOG CONVERTER

DAC7554
www.ti.com
SLAS399A – OCTOBER 2004 – REVISED NOVEMBER 2004
12-BIT, QUAD, ULTRALOW GLITCH, VOLTAGE OUTPUT
DIGITAL-TO-ANALOG CONVERTER
FEATURES
• 2.7-V to 5.5-V Single Supply
• 12-Bit Linearity and Monotonicity
• Rail-to-Rail Voltage Output
• Settling Time: 5 µs (Max)
• Ultralow Glitch Energy: 0.1 nVs
• Ultralow Crosstalk: –100 dB
• Low Power: 880 µA (Max)
• Per-Channel Power Down: 2 µA (Max)
• Power-On Reset to Zero Scale
• SPI-Compatible Serial Interface: Up to 50 MHz
• Simultaneous or Sequential Update
• Specified Temperature Range: –40°C to 105°C
• Small 10-Lead MSOP Package
APPLICATIONS
• Portable Battery-Powered Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Programmable Attenuators
• Industrial Process Control
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-kΩ, 200-pF load rail-to-rail
with 5-µs 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 µA.
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 µW in
power-down mode.
The DAC7554 is available in a 10-lead MSOP pack-
age and is specified over –40°C to 105°C.
FUNCTIONAL BLOCK DIAGRAM
V_DD
REFIN
SCLK
SYNC
DIN
Interface
Logic
Input
Register
DAC
Register
String
DAC A
Buffer
Input
Register
DAC
Register
String
DAC B
Buffer
Input
Register
DAC
Register
String
DAC C
Buffer
Power-On
Reset
Input
Register
DAC
Register
String
DAC D
Buffer
DAC7554
Power-Down
Logic
GND
V_OUTA
V_OUTB
V_OUTC
V_OUTD
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 © 2004, Texas Instruments Incorporated