DAC128S085

Manufacturer Part NumberDAC128S085
ManufacturerTexas Instruments
DAC128S085 datasheet
 


Specifications of DAC128S085

Resolution(bits)12Dac: Channels8
InterfaceSerial SPIOutput TypeVoltage
Output Range Max.(v Or Ma)5.5Settling Time(µs)8
Reference: TypeExtPower Consumption(typ)(mw)1.95
Dnl(max)(+/-lsb)0.75Inl(max)(+/-lsb)8
Pin/package16SON, 16TSSOP, 16WQFN, 16WSON  
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12-Bit Micro Power OCTAL Digital-to-Analog Converter
with Rail-to-Rail Outputs
General Description
The DAC128S085 is a full-featured, general purpose OCTAL
12-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 DAC128S085
is packaged in a 16-lead LLP package and a 16-lead TSSOP
package. The LLP package makes the DAC128S085 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 DAC128S085 also of-
fers daisy chain operation where an unlimited number of
DAC128S085s can be updated simultaneously using a single
serial interface.
There are two references for the DAC128S085. 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
widest possible output dynamic range. The DAC128S085 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 DAC128S085 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 DAC128S085 make it an
excellent choice for use in battery operated equipment.
The DAC128S085 is one of a family of pin compatible DACs,
including the 8-bit DAC088S085 and the 10-bit DAC108S085.
All three parts are offered with the same pinout, allowing sys-
tem designers to select a resolution appropriate for their
application without redesigning their printed circuit board. The
DAC128S085 operates over the extended industrial temper-
ature range of −40°C to +125°C.
Ordering Information
Order Numbers
DAC128S085CISQ
DAC128S085CISQX
DAC128S085CIMT
DAC128S085CIMTX
DAC128S085EB
SPI ™ is a trademark of Motorola, Inc.
© 2009 National Semiconductor Corporation
DAC128S085
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
Operating Temperature Range of −40°C to +125°C
Industry's Smallest Package
Key Specifications
Resolution
INL
DNL
Settling Time
, providing the
A
Zero Code Error
Full-Scale Error
Supply Power
— Normal
— Power Down
Applications
Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage & Current Sources
Programmable Attenuators
Voltage Reference for ADCs
Sensor Supply Voltage
Range Detectors
Temperature Range
−40°C
T
+125°C
A
−40°C
T
+125°C
LLP Tape-and-Reel
A
−40°C
T
+125°C
A
TSSOP Tape-and-Reel
−40°C
T
+125°C
A
Evaluation Board - BOTH
300169
March 10, 2009
±8 LSB (max)
+0.75 / −0.4 LSB (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
Package
Top Mark
16-Lead LLP
16-Lead TSSOP
X78C
X78C
www.national.com
A
12 bits
8.5 µs (max)