DAC088S085 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – 8-Bit Micro Power OCTAL Digital-to-Analog Converter with Rail-to-Rail Outputs

September 2007
DAC088S085
8-Bit Micro Power OCTAL Digital-to-Analog Converter with
Rail-to-Rail Outputs
General Description
The DAC088S085 is a full-featured, general purpose OCTAL
8-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to +5.5V supply and con-
sumes 1.95 mW at 3V and 4.85 mW at 5V. The DAC088S085
is packaged in a 16-lead LLP package and a 16-lead TSSOP
package. The LLP package makes the DAC088S085 the
smallest OCTAL DAC in its class. The on-chip output ampli-
fiers allow 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™, QSPI,
MICROWIRE and DSP interfaces. The DAC088S085 also of-
fers daisy chain operation where an unlimited number of
DAC088S085s can be updated simultaneously using a single
serial interface.
There are two references for the DAC088S085. One refer-
ence input serves channels A through D while the other
reference serves channels E through H. Each reference can
be set independently between 0.5V and V_A, providing the
widest possible output dynamic range. The DAC088S085 has
a 16-bit input shift register that controls the mode of operation,
the power-down condition, and the DAC channels' register/
output value. All eight DAC outputs can be updated simulta-
neously or individually.
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
the device. The power-down feature of the DAC088S085 al-
lows each DAC to be independently powered with three dif-
ferent termination options. With all the DAC channels
powered down, power consumption reduces to less than 0.3
µW at 3V and less than 1 µW at 5V. The low power consump-
tion and small packages of the DAC088S085 make it an
excellent choice for use in battery operated equipment.
The DAC088S085 is one of a family of pin compatible DACs,
including the 10-bit DAC108S085 and the 12-bit
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.
Features
■ ^{Guaranteed Monotonicity}
■ ^{Low Power Operation}
■ ^{Rail-to-Rail Voltage Output}
■ ^{Daisy Chain Capability}
■ ^{Power-on Reset to 0V}
■ ^{Simultaneous Output Updating}
■ ^{Individual Channel Power Down Capability}
■ ^{Wide power supply range (+2.7V to +5.5V)}
■ ^{Dual Reference Voltages with range of 0.5V to V}_A
■ ^{Operating Temperature Range of −40°C to +125°C}
■ ^{Industry's Smallest Package}
Key Specifications
■ ^Resolution
■ ^INL
■ ^DNL
■ ^{Settling Time}
■ ^{Zero Code Error}
■ ^{Full-Scale Error}
■ ^{Supply Power}
■ — ^Normal
— Power Down
8 bits
±0.5 LSB (max)
+0.15 / −0.1 LSB (max)
4.5 µs (max)
+15 mV (max)
−0.75 %FSR (max)
1.95 mW (3V) / 4.85 mW (5V) typ
0.3 µW (3V) / 1 µW (5V) typ
Applications
■ ^{Battery-Powered Instruments}
■ ^{Digital Gain and Offset Adjustment}
■ ^{Programmable Voltage & Current Sources}
■ ^{Programmable Attenuators}
■ ^{Voltage Reference for ADCs}
■ ^{Sensor Supply Voltage}
■ ^{Range Detectors}
Ordering Information
Order Numbers
DAC088S085CISQ
DAC088S085CISQX
DAC088S085CIMT
DAC088S085CIMTX
DAC088S085EB
SPI™ is a trademark of Motorola, Inc.
Temperature Range
−40°C ≤ T_A ≤ +125°C
−40°C ≤ T_A ≤ +125°C
−40°C ≤ T_A ≤ +125°C
−40°C ≤ T_A ≤ +125°C
© 2007 National Semiconductor Corporation 300313
Package
16-Lead LLP
LLP Tape-and-Reel
16-Lead TSSOP
TSSOP Tape-and-Reel
Evaluation Board - BOTH
Top Mark
X82C
X82C
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