20-Bit, Low-Power Digital-To-Analog Converter (Rev. G) 0 pages

DAC1220
Clock Generator
Serial
Interface
2nd-Order
DS
Modulator
Instruction Register
Command Register
Data Register
Offset Register
Full-Scale Register
Microcontroller
1st-Order
Switched
Capacitor Filter
2nd-Order
Continuous
Time Post Filter
Modulator Control
XIN XOUT VREF AVDD AGND
CS DVDD DGND
C1
C2
SDIO
VOUT
SCLK
DAC1220
www.ti.com..................................................................................................................................... SBAS082G –FEBRUARY 1998–REVISED SEPTEMBER 2009
20-Bit, Low-Power
Digital-to-Analog Converter
Check for Samples: DAC1220
1FEATURES DESCRIPTION
2• 20-Bit Monotonicity Ensured Over –40°C to The DAC1220 is a 20-bit digital-to-analog (D/A)
+85°C converter offering 20-bit monotonic performance over
• Low Power: 2.5mW the specified temperature range. It utilizes
• Voltage Output delta-sigma technology to achieve inherently linear performance in a small package at very low power.
• Settling Time: 2ms to 0.012% The resolution of the device can be programmed to
• Maximum Linearity Error: ±0.0015% 20 bits for Full-Scale, settling to 0.003% within 15ms
• On-Chip Calibration typical, or 16 bits for Full-Scale, settling to 0.012%
within 2ms max. The output range is two times the
APPLICATIONS external reference voltage. On-chip calibration circuitry dramatically reduces low offset and gain
• Process Control errors.
• ATE Pin Electronics The DAC1220 features a synchronous serial
• Closed-Loop Servo Control interface; in single-converter applications, the serial
• Smart Transmitters interface can be accomplished with just two wires,
• Portable Instruments allowing low-cost isolation. For multiple converters, a
CS signal allows for selection of the appropriate D/A
converter.
The DAC1220 has been designed for closed-loop
control applications in the industrial process control
market and high-resolution applications in the test
and measurement market. It is also ideal for remote
applications, battery-powered instruments, and
isolated systems. The DAC1220 is available in an
SSOP-16 package.
1
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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 1998–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.