DAC7551_13 Datasheet, PDF (1/22 Pages) Texas Instruments – 12-Bit, Ultra-Low Glitch, Voltage Output DIGITAL-TO-ANALOG CONVERTER

BurrĆBrown Products
from Texas Instruments
DAC7551
SLAS441E – MARCH 2005 – REVISED APRIL 2007
12-Bit, Ultra-Low Glitch, Voltage Output
DIGITAL-TO-ANALOG CONVERTER
FEATURES
• Relative Accuracy (INL): ±0.35LSB
• Ultra-Low Glitch Energy: 0.1nV-s
• Low Power Operation: 100µA at 2.7V
• Power-On Reset to Zero Scale
• Power Supply: 2.7V to 5.5V Single Supply
• Power-Down: 0.05µA at 2.7V
• 12-Bit Linearity and Monotonicity
• Rail-to-Rail Voltage Output
• Settling Time: 5µs (Max)
• SPI-Compatible Serial Interface with
Schmitt-Trigger Input: Up to 50MHz
• Daisy-Chain Capability
• Asynchronous Hardware Clear to Zero Scale
• Specified Temperature Range:
– 40°C to +105°C
• Small, 2 x 3 mm, 12-Lead SON Package
APPLICATIONS
• Portable, Battery-Powered Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Programmable Attenuators
• Industrial Process Control
DESCRIPTION
The DAC7551 is a single-channel, voltage-output
digital-to-analog converter (DAC) with exceptional
linearity and monotonicity, and a proprietary
architecture that minimizes glitch energy. The
low-power DAC7551 operates from a single 2.7V to
5.5V supply. The DAC7551 output amplifiers can
drive a 2kΩ, 200pF load rail-to-rail with 5µs settling
time; the output range is set using an external
voltage reference.
The 3-wire serial interface operates at clock rates up
to 50MHz and is compatible with SPI™, QSPI™,
Microwire™, and DSP interface standards. The parts
incorporate a power-on-reset circuit to ensure that
the DAC output powers up to 0V and remains there
until a valid write cycle to the device takes place. The
part contains a power-down feature that reduces the
current consumption of the device to under 2µA.
Small size and low-power operation make the
DAC7551 ideally suited for battery-operated, portable
applications. The power consumption is typically
0.5mW at 5V, 0.23mW at 3V, and reduces to 1µW 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
Shift
DAC
String
Logic
Register
Register
DAC
+
SDO CLR
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.
SPI, QSPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor Corp..
All other trademarks are the property of their respective owners.
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 © 2005–2007, Texas Instruments Incorporated