National Semiconductor DAC088S085 8-Bit Micro Power OCTAL Digital-to-Analog Converter with Rail-to-Rail Outputs

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-B it M ic ro r O ig ita l-to -A lo rte r w ith il-to -R il O tp ts

September 2007

DAC088S085 8-Bit Micro Power OCTAL Digital-to-Analog Converter with Rail-to-Rail Outputs General Description Features The DAC088S085 is a full-featured, general purpose OCTAL Guaranteed Monotonicity 8-bit voltage-output digital-to-analog converter (DAC) that

Low Power Operation

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

Rail-to-Rail Voltage Output

sumes 1.95 m W at 3V and 4.85 m W at 5V. The DAC088S085

Daisy Chain Capability

is packaged in a 16-lead LLP package and a 16-lead TSSOP

package. The LLP package makes the DAC088S085 the Power-on Reset to 0V

smallest OCTAL DAC in its class. The on-chip output ampli- Simultaneous Output Updating fiers allow rail-to-rail output swing and the three wire serial

Individual Channel Power Down Capability

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

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

supply voltage range. Competitive devices are limited to 25

Dual Reference Voltages with range of 0.5V to VA

MHz clock rates at supply voltages in the 2.7V to 3.6V range. The serial interface is compatible with standard SPI™, QSPI, Operating Temperature Range of −40°C to +125°C MICROWIRE and DSP interfaces. The DAC088S085 also of-

Industry's Smallest Package

fers daisy chain operation where an unlimited number of DAC088S085s can be updated simultaneously using a single

Key Specifications

serial interface.

Resolution 8 bits

There are two references for the DAC088S085. One refer-

INL ±0.5 LSB (max)

ence input serves channels A through D while the other

reference serves channels E through H. Each reference can DNL +0.15 / −0.1 LSB (max) be set independently between 0.5V and VA, providing the Settling Time 4.5 µs (max)

widest possible output dynamic range. The DAC088S085 has Zero Code Error +15 m V (max) a 16-bit input shift register that controls the mode of operation, Full-Scale Error −0.75 %FSR (max) the power-down condition, and the DAC channels' register/

Supply Power

output value. All eight DAC outputs can be updated simulta-

Normal 1.95 m W (3V) / 4.85 m W (5V) typ

neously or individually.

Power Down 0.3 µW (3V) / 1 µW (5V) typ

A power-on reset circuit ensures that the DAC outputs power up to zero volts and remain there until there is a valid write to

Applications

the device. The power-down feature of the DAC088S085 al-

lows each DAC to be independently powered with three dif- Battery-Powered Instruments

ferent termination options. With all the DAC channels

Digital Gain and Offset Adjustment

powered down, power consumption reduces to less than 0.3

Programmable Voltage & Current Sources

µW at 3V and less than 1 µW at 5V. The low power consump-

Programmable Attenuators

tion and small packages of the DAC088S085 make it an

excellent choice for use in battery operated equipment. Voltage Reference for ADCs The DAC088S085 is one of a family of pin compatible DACs, Sensor Supply Voltage

including the 10-bit DAC108S085 and the 12-bit Range Detectors DAC128S085. All three parts are offered with the same pinout, allowing system designers to select a resolution ap- propriate for their application without redesigning their printed circuit board. The DAC088S085 operates over the extended industrial temperature range of −40°C to +125°C.

Ordering Information Order Numbers Temperature Range Package Top Mark DAC088S085CISQ −40°C ≤ TA ≤ +125°C 16-Lead LLP DAC088S085CISQX −40°C ≤ TA ≤ +125°C LLP Tape-and-Reel DAC088S085CIMT −40°C ≤ TA ≤ +125°C 16-Lead TSSOP X82C DAC088S085CIMTX −40°C ≤ TA ≤ +125°C TSSOP Tape-and-Reel X82C DAC088S085EB Evaluation Board - BOTH SPI™ is a trademark of Motorola, Inc.

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