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 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.
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.
X
IN
X
OUT
V
REF
C
1
C
2A
C
2B
C
3
Clock Generator
Microcontroller
Instruction Register
Command Register
Data Register
Offset Register
Full-Scale Register
Second-Order
鈭嗏垜
Modulator
First-Order
Switched
Capacitor Filter
Second-Order
Continuous
Time Post Filter
V
OUT
SDIO
SCLK
Serial
Interface
Modulator Control
CS
DV
DD
DGND
AV
DD
AGND
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111
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