®
DAC1221
DAC1221
For most current data sheet and other product
information, visit www.burr-brown.com
16-Bit Low Power
DIGITAL-TO-ANALOG CONVERTER
FEATURES
APPLICATIONS
● 16-BIT MONOTONICITY GUARANTEED
● PROCESS CONTROL
OVER –40°C TO +85°C
● ATE PIN ELECTRONICS
● CLOSED-LOOP SERVO-CONTROL
● SMART TRANSMITTERS
● PORTABLE INSTRUMENTS
● VCO CONTROL
● LOW POWER: 1.2mW
● VOLTAGE OUTPUT
● SETTLING TIME: 2ms to 0.012%
● MAX LINEARITY ERROR: 30ppm
● ON-CHIP CALIBRATION
The DAC1221 features a synchronous serial interface.
In single converter applications, the serial interface can
be accomplished with just two wires, allowing low-
cost isolation. For multiple converters, a CS signal
allows for selection of the appropriate D/A converter.
DESCRIPTION
The DAC1221 is a Digital-to-Analog (D/A) converter
offering 16-bit monotonic performance over the speci-
fied temperature range. It utilizes delta-sigma technol-
ogy to achieve inherently linear performance in a
small package at very low power. The output range is
two times the external reference voltage. On-chip
calibration circuitry dramatically reduces offset and
gain errors.
The DAC1221 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 appli-
cations, battery-powered instruments, and isolated sys-
tems. The DAC1221 is available in a SSOP-16 package.
XIN
XOUT
VREF
C1 C2A C2B C3
Clock Generator
Microcontroller
Second-Order
∆∑
Modulator
First-Order
Switched
Capacitor Filter
Second-Order
Continuous
Time Post Filter
Instruction Register
Command Register
Data Register
VOUT
Offset Register
Full-Scale Register
Modulator Control
Serial
Interface
SDIO
SCLK
CS
DVDD
DGND
AVDD
AGND
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
© 1999 Burr-Brown Corporation
PDS-1519B
Printed in U.S.A. May, 2000
DAC1221
1
SBAS113