DAC084S085EVAL NSC [National Semiconductor], DAC084S085EVAL Datasheet

DAC084S085EVAL

Manufacturer Part Number

DAC084S085EVAL

Description

8-Bit Micro Power QUAD Digital-to-Analog Converter with Rail-to-Rail Output

Manufacturer

NSC [National Semiconductor]

Datasheet

1.DAC084S085EVAL.pdf (18 pages)

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DAC084S085

8-Bit Micro Power QUAD Digital-to-Analog Converter

with Rail-to-Rail Output

General Description

The DAC084S085 is a full-featured, general purpose QUAD

8-bit voltage-output digital-to-analog converter (DAC) that

can operate from a single +2.7V to 5.5V supply and uses

370 µA at 3V and 500 µA at 5V. The DAC084S085 is

packaged in a 10-lead MSOP package. The on-chip output

amplifier allows rail-to-rail output swing and the three wire

serial interface operates at clock rates up to 40 MHz over the

entire supply voltage range. Competitive devices are limited

to 25 MHz clock rates at supply voltages in the 2.7V to 3.6V

range. The serial interface is compatible with standard

SPI

The reference for the DAC084S085 serves all four channels

and can vary in voltage between 1V and V

widest possible output dynamic range. The DAC084S085

has a 16-bit input shift register that controls the outputs to be

updated, the mode of operation, the powerdown condition,

and the binary input data. All four outputs can be updated

simultaneously or individually depending on the setting of

the two mode of operation bits.

A power-on reset circuit ensures that the DAC output powers

up to zero volts and remains there until there is a valid write

to the device. A power-down feature reduces power con-

sumption to less than a microWatt with three different termi-

nation options.

The low power consumption and small packages of the

DAC084S085 make it an excellent choice for use in battery

operated equipment.

The DAC084S085 is one of a family of pin compatible DACs,

including

DAC124S085. The DAC084S085 operates over the ex-

tended industrial temperature range of −40˚C to +105˚C.

Pin Configuration

SPI

™

is a trademark of Motorola, Inc.

, QSPI, MICROWIRE and DSP interfaces.

the

10-bit

DAC104S085

DS201954

and

20195402

, providing the

the

12-bit

Features

n Guaranteed Monotonicity

n Low Power Operation

n Rail-to-Rail Voltage Output

n Power-on Reset to 0V

n Simultaneous Output Updating

n Wide power supply range (+2.7V to +5.5V)

n Power Down Modes

Key Specifications

n Resolution

n INL

n DNL

n Settling Time

n Zero Code Error

n Full-Scale Error

n Supply Current

Applications

n Battery-Powered Instruments

n Digital Gain and Offset Adjustment

n Programmable Voltage & Current Sources

n Programmable Attenuators

— Normal

— Pwr Down

485 µA (3.6V) / 650 µA (5.5V) max

20 nA (3.6V) / 30 nA (5.5V) typ

+0.18 / −0.13 LSB (max)

−0.75 %FS (max)

0.5 LSB (max)

+15 mV (max)

www.national.com

4.5 µs (max)

June 2006

8 bits

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