3 mm x 3 mm

Actual Size

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FEATURES

DESCRIPTION

APPLICATIONS

_

+

Interface

Logic

Input

Register

DAC

Register

String

DAC A

Power-Down

Logic

Power-On

Reset

GND

CLR

DCEN

SDIN

SYNC

SCLK

_

+

Input

Register

DAC

Register

String

DAC B

PD

SDO

FUNCTIONAL BLOCK DIAGRAM

DAC7553

DAC7553

SLAS477 – AUGUST 2005

12-BIT, DUAL, ULTRALOW GLITCH, VOLTAGE OUTPUT

DIGITAL-TO-ANALOG CONVERTER

•

2.7-V to 5.5-V Single Supply

The

DAC7553

is

a

12-bit,

dual-channel,

volt-

age-output

DAC

with

exceptional

linearity

and

•

12-Bit Linearity and Monotonicity

monotonicity. Its proprietary architecture minimizes

•

Rail-to-Rail Voltage Output

undesired transients such as code-to-code glitch and

•

Settling Time: 5 µs (Max)

channel-to-channel

crosstalk.

The

low-power

•

Ultralow Glitch Energy: 0.1 nVs

DAC7553 operates from a single 2.7-V to 5.5-V

supply. The DAC7553 output amplifiers can drive a

•

Ultralow Crosstalk: –100 dB

2-k

Ω, 200-pF load rail-to-rail with 5-µs settling time;

•

Low Power: 440 µA (Max)

the output range is set using an external voltage

•

Per-Channel Power Down: 2 µA (Max)

reference.

•

Power-On Reset to Midscale

The 3-wire serial interface operates at clock rates up

•

2s Complement Input Data Format

to 50 MHz and is compatible with SPI, QSPI,

Microwire™, and DSP interface standards. The out-

•

SPI-Compatible Serial Interface: Up to 50 MHz

puts of all DACs may be updated simultaneously or

•

Daisy-Chain Capability

sequentially. The parts incorporate a power-on-reset

•

Asynchronous Hardware Clear

circuit to ensure that the DAC outputs power up at

midscale and remain there until a valid write cycle to

•

Simultaneous or Sequential Update

the

device

takes

place.

The

parts

contain

a

•

Specified Temperature Range: –40°C to 105°C

power-down feature that reduces the current con-

•

Small 3-mm × 3-mm, 16-Lead QFN Package

sumption of the device to under 2 µA.

The small size and low-power operation makes the

DAC7553 ideally suited for battery-operated portable

•

Portable Battery-Powered Instruments

applications. The power consumption is typically

•

Digital Gain and Offset Adjustment

1.5 mW at 5 V, 0.75 mW at 3 V, and reduces to 1 µW

in power-down mode.

•

Programmable Voltage and Current Sources

•

Programmable Attenuators

The DAC7553 is available in a 16-lead QFN package

and is specified over –40°C to 105°C.

•

Industrial Process Control

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.

Microwire is a trademark of National Semiconductor Corp..

PRODUCT PREVIEW information concerns products in the forma-

Copyright © 2005, Texas Instruments Incorporated

tive or design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the

right to change or discontinue these products without notice.