DAC7551 Datasheet, PDF (1/18 Pages) Texas Instruments – 12-BIT, ULTRALOW GLITCH, VOLTAGE OUTPUT DIGITAL-TO-ANALOG CONVERTER

DAC7551
www.ti.com
12-BIT, ULTRALOW GLITCH, VOLTAGE OUTPUT
DIGITAL-TO-ANALOG CONVERTER
SLAS441 – MARCH 2005
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
• Low Power: 200 µA (Max)
• Power Down: 2 µA (Max)
• Power-On Reset to Zero Scale
• SPI-Compatible Serial Interface: Up to 50 MHz
• Daisy-Chain Capability
• Asynchronous Hardware Clear
• Specified Temperature Range: –40°C to 105°C
• Small, 2-mm x 3-mm, 12-Lead SON Package
DESCRIPTION
The DAC7551 is a single-channel, voltage-output
DAC with exceptional linearity and monotonicity. Its
proprietary architecture minimizes glitch energy. The
low-power DAC7551 operates from a single 2.7-V to
5.5-V supply. The DAC7551 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 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 consumption of the device to under 2 µA.
APPLICATIONS
• Portable Battery-Powered Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Programmable Attenuators
• Industrial Process Control
The small size and low-power operation makes the
DAC7551 ideally suited for battery-operated portable
applications. The power consumption is typically
0.5 mW at 5 V, 0.23 mW at 3 V, and reduces to 1 µW
in power-down mode.
The DAC7551 is available in a 12-lead SON package
and is specified over –40°C to 105°C.
FUNCTIONAL BLOCK DIAGRAM
V_DD
IOV_DD
V_REFH
SCLK
SYNC
SDIN
Interface
Logic
SDO CLR
_
Shift
DAC
String
Register
Register
DAC
+
Power-On
Reset
Power-Down
Logic
GND
V_REFL
V_FB
V_OUT
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.
Microwire is a trademark of National Semiconductor Corp..
PRODUCT PREVIEW information concerns products in the forma-
tive or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright © 2005, Texas Instruments Incorporated