DAC1220 Datasheet, PDF (1/14 Pages) Burr-Brown (TI) – 20-Bit Low Power DIGITAL-TO-ANALOG CONVERTER

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DAC1220
DAC1220
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information, visit www.burr-brown.com
20-Bit Low Power
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q 20-BIT MONOTONICITY GUARANTEED
OVER –40°C to +85°C
q LOW POWER: 2.5mW
q VOLTAGE OUTPUT
q SETTLING TIME: 2ms to 0.012%
q MAX LINEARITY ERROR: ±0.0015%
q 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 re-
duces low offset and gain errors.
X_IN
X_OUT
V_REF
APPLICATIONS
q PROCESS CONTROL
q ATE PIN ELECTRONICS
q CLOSED-LOOP SERVO-CONTROL
q SMART TRANSMITTERS
q PORTABLE INSTRUMENTS
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 appli-
cations, battery-powered instruments, and isolated sys-
tems. The DAC1220 is available in a SSOP-16
package.
AV_DD AGND
Clock Generator
Microcontroller
Instruction Register
Command Register
Data Register
Offset Register
Full-Scale Register
SDIO
SCLK
Serial
Interface
Second-Order
∆∑
Modulator
First-Order
Switched
Capacitor Filter
Second-Order
Continuous
Time Post Filter
Modulator Control
C₁
V_OUT
C₂
CS
DV_DD
DGND
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© 1998 Burr-Brown Corporation
PDS-1418B
1
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Printed in U.S.A. April , 2000