DAC1220 Datasheet, PDF (1/26 Pages) Burr-Brown (TI) – 20-Bit Low Power DIGITAL-TO-ANALOG CONVERTER

DAC1220
DAC1220
www.ti.com...................................................................................................................................... SBAS082G – FEBRUARY 1998 – REVISED SEPTEMBER 2009
20-Bit, Low-Power
Digital-to-Analog Converter
Check for Samples: DAC1220
FEATURES
1
•2 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
APPLICATIONS
• Process Control
• ATE Pin Electronics
• Closed-Loop Servo Control
• Smart Transmitters
• Portable Instruments
X_IN
X_OUT
V_REF
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.
AV_DD AGND
Clock Generator
Microcontroller
Instruction Register
Command Register
Data Register
Offset Register
Full−Scale Register
SDIO
SCLK
Serial
Interface
2nd−Order
∆Σ
Modulator
1st−Order
Switched
Capacitor Filter
2nd−Order
Continuous
Time Post Filter
Modulator Control
CS
DV_DD
DGND
C₁
V_OUT
C₂
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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.
Copyright © 1998–2009, Texas Instruments Incorporated