DAC7811 Datasheet, PDF (1/18 Pages) Texas Instruments – 12-Bit, Serial Input, Multiplying Digital-to-Analog Converter

www.ti.com
12-Bit, Serial Input, Multiplying
Digital-to-Analog Converter
DAC7811
SBAS337 – APRIL 2005
FEATURES
• 2.7 V to 5.5 V Supply Operation
• 50 MHz Serial Interface
• 10 MHz Multiplying Bandwidth
• ±10 V Reference Input
• Low Glitch Energy: 2 nV-s
• Extended Temperature Range:
–40°C to +125°C
• 10-Lead SON Package
• 12-Bit Monotonic
• 4-Quadrant Multiplication
• Power-On Reset with Brownout Detection
• Daisy-Chain Mode
• Readback Function
• Industry-Standard Pin Configuration
APPLICATIONS
• Portable Battery-Powered Instruments
• Waveform Generators
• Analog Processing
• Programmable Amplifiers and Attenuators
• Digitally Controlled Calibration
• Programmable Filters and Oscillators
• Composite Video
• Ultrasound
DESCRIPTION
The DAC7811 is a CMOS 12-bit current output
digital-to-analog converter (DAC). This device
operates from a 3.0 V to 5.5 V power supply, making
it suitable to both battery-powered and many other
applications.
This DAC uses a double-buffered 3-wire serial
interface that is compatible with SPI™, QSPI,
MICROWIRE™, and most DSP interface standards.
In addition, a serial data out pin (SDO) allows for
daisy-chaining when multiple packages are used.
Data readback allows the user to read the contents of
the DAC register via the SDO pin. On power-up, the
internal shift register and latches are filled with zeroes
and the DAC outputs are at zero scale.
The DAC7811 offers excellent 4-quadrant multipli-
cation characteristics, with large signal multiplying
bandwidth of 10 MHz. The applied external reference
input voltage (V_REF) determines the full-scale output
current. An integrated feedback resistor (R_FB) pro-
vides temperature tracking and full-scale voltage
output when combined with an external cur-
rent-to-voltage precision amplifier.
The DAC7811 is available in a 10-lead MSOP pack-
age as well as a small 10-lead SON package.
V_DD
V_REF
DAC7811
12-Bit
R-2R DAC
R
R_FB
I_OUT1
I_OUT2
Power-On
Reset
DAC Register
Input Latch
SYNC
SCLK
SDIN
Control Logic and
Input Shift Register
GND
SDO
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 is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor.
All trademarks are the property of their respective owners.
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