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National Semiconductor |
www.DataSheet4U.com
June 2005
DAC081S101
8-Bit Micro Power Digital-to-Analog Converter with
Rail-to-Rail Output
General Description
Features
The DAC081S101 is a full-featured, general purpose 8-bit n Guaranteed Monotonicity
voltage-output digital-to-analog converter (DAC) that can n Low Power Operation
operate from a single +2.7V to 5.5V supply and consumes
just 175 µA of current at 3.6 Volts. The on-chip output
amplifier allows rail-to-rail output swing and the three wire
serial interface operates at clock rates up to 30 MHz over the
specified supply voltage range and is compatible with stan-
dard SPI™, QSPI, MICROWIRE and DSP interfaces. Com-
petitive devices are limited to 20 MHz clock rates at supply
n Rail-to-Rail Voltage Output
n Power-on Reset to Zero Volts Output
n SYNC Interrupt Facility
n Wide power supply range (+2.7V to +5.5V)
n Small Packages
n Power Down Feature
voltages in the 2.7V to 3.6V range.
The supply voltage for the DAC081S101 serves as its volt- Key Specifications
age reference, providing the widest possible output dynamic n Resolution
8 bits
range. 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 consumption to less than a microWatt.
The low power consumption and small packages of the
DAC081S101 make it an excellent choice for use in battery
operated equipment.
The DAC081S101 is a direct replacement for the AD5300
n DNL
+0.04, -0.02 LSB (typ)
n Output Settling Time
3 µs (typ)
n Zero Code Error
3.8 mV (typ)
n Full-Scale Error
−0.07 %FS (typ)
n Power Consumption
— Normal Mode 0.63 mW (3.6V) / 1.41 mW (5.5V) typ
— Pwr Down Mode 0.14 µW (3.6V) / 0.33 µW (5.5V) typ
and is one of a family of pin compatible DACs, includDinagtathSeheeAt4pU.pcolimcations
10-bit DAC101S101 and the 12-bit DAC121S101. The
DAC081S101 operates over the extended industrial tem- n Battery-Powered Instruments
perature range of −40˚C to +105˚C.
n Digital Gain and Offset Adjustment
n Programmable Voltage & Current Sources
n Programmable Attenuators
Pin Configuration
DataShee
20155101
Ordering Information
Order Numbers
DAC081S101CIMM
DAC081S101CIMMX
DAC081S101CIMK
DAC081S101CIMKX
DAC081S101EVAL
Temperature Range
−40˚C ≤ TA ≤ +105˚C
−40˚C ≤ TA ≤ +105˚C
−40˚C ≤ TA ≤ +105˚C
−40˚C ≤ TA ≤ +105˚C
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© 2005 National Semiconductor Corporation
DS201551
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20155102
Package
MSOP
MSOP Tape-and-Reel
TSOT
TSOT Tape-and-Reel
Evaluation Board
Top Mark
X64C
X64C
X65C
X65C
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Block Diagram
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Pin Descriptions
TSOT
(SOT-23)
Pin No.
1
2
MSOP
Pin No.
4
8
31
47
56
65
2, 3
20155103
Symbol
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Description
DataShee
VOUT
GND
VA
DIN
SCLK
SYNC
NC
DAC Analog Output Voltage.
Ground reference for all on-chip circuitry.
Power supply and Reference input. Should be decoupled
to GND.
Serial Data Input. Data is clocked into the 16-bit shift
register on the falling edges of SCLK after the fall of
SYNC.
Serial Clock Input. Data is clocked into the input shift
register on the falling edges of this pin.
Frame synchronization input for the data input. When this
pin goes low, it enables the input shift register and data
is transferred on the falling edges of SCLK. The DAC is
updated on the 16th clock cycle unless SYNC is brought
high before the 16th clock, in which case the rising edge
of SYNC acts as an interrupt and the write sequence is
ignored by the DAC.
No Connect. There is no internal connection to these
pins.
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