DA
C1
220
DAC1220
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SBAS082G – FEBRUARY 1998 – REVISED SEPTEMBER 2009
20-Bit, Low-Power
Digital-to-Analog Converter
Check for Samples:
DAC1220
1
FEATURES
•
20-Bit Monotonicity Ensured Over –40°C to
+85°C
Low Power: 2.5mW
Voltage Output
Settling Time: 2ms to 0.012%
Maximum Linearity Error: ±0.0015%
On-Chip Calibration
DESCRIPTION
The DAC1220 is a 20-bit digital-to-analog (D/A)
converter offering 20-bit monotonic performance over
the specified temperature range. It utilizes
delta-sigma technology to achieve inherently linear
performance in a small package at very low power.
The resolution of the device can be programmed to
20 bits for Full-Scale, settling to 0.003% within 15ms
typical, or 16 bits for Full-Scale, settling to 0.012%
within 2ms max. The output range is two times the
external reference voltage. On-chip calibration
circuitry dramatically reduces low offset and gain
errors.
The DAC1220 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 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.
X
IN
X
OUT
V
REF
AV
DD
AGND
2
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APPLICATIONS
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•
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•
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Process Control
ATE Pin Electronics
Closed-Loop Servo Control
Smart Transmitters
Portable Instruments
Clock Generator
Microcontroller
Instruction Register
Command Register
Data Register
Offset Register
Full−Scale Register
2nd−Order
∆Σ
Modulator
1st−Order
Switched
Capacitor Filter
2nd−Order
Continuous
Time Post Filter
C
1
V
OUT
C
2
SDIO
SCLK
Serial
Interface
Modulator Control
CS
DV
DD
DGND
1
2
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.
All trademarks are the property of their respective owners.
Copyright © 1998–2009, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
