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PDF DAC082S085 Data sheet ( Hoja de datos )
| Número de pieza | DAC082S085 | |
| Descripción | 8-Bit Micro Power DUAL Digital-to-Analog Converter | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DAC082S085 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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January 2007
DAC082S085
8-Bit Micro Power DUAL Digital-to-Analog Converter with
Rail-to-Rail Output
General Description
The DAC082S085 is a full-featured, general purpose DUAL
8-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and consumes
0.6 mW at 3V and 1.6 mW at 5V. The DAC082S085 is pack-
aged in 10-lead LLP and MSOP packages. The 10-lead LLP
package makes the DAC082S085 the smallest DUAL DAC in
its class. 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 sup-
ply voltages in the 2.7V to 3.6V range. The serial interface is
compatible with standard SPI™, QSPI, MICROWIRE and
DSP interfaces.
The reference for the DAC082S085 serves both channels and
can vary in voltage between 1V and VA, providing the widest
possible output dynamic range. The DAC082S085 has a 16-
bit input shift register that controls the outputs to be updated,
the mode of operation, the powerdown condition, and the bi-
nary input data. Both 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
DAC082S085 make it an excellent choice for use in battery
operated equipment.
The DAC082S085 is one of a family of pin compatible DACs,
including the 10-bit DAC102S085 and the 12-bit
DAC124S085. The DAC082S085 operates over the extended
industrial temperature range of −40°C to +105°C.
Features
■ Guaranteed Monotonicity
■ Low Power Operation
■ Rail-to-Rail Voltage Output
■ Power-on Reset to 0V
■ Simultaneous Output Updating
■ Wide power supply range (+2.7V to +5.5V)
■ Industry's Smallest Package
■ Power Down Modes
Key Specifications
■ Resolution
■ INL
■ DNL
■ Settling Time
■ Zero Code Error
■ Full-Scale Error
■ Supply Power
■ — Normal
— Power Down
8 bits
±0.5 LSB (max)
+0.18 / −0.13 LSB (max)
4.5 µs (max)
+15 mV (max)
−0.75 %FS (max)
0.6 mW (3V) / 1.6 mW (5V) typ
0.3 µW (3V) / 0.8 µW (5V) typ
Applications
■ Battery-Powered Instruments
■ Digital Gain and Offset Adjustment
■ Programmable Voltage & Current Sources
■ Programmable Attenuators
Pin Configuration
20195601
SPI™ is a trademark of Motorola, Inc.
© 2007 National Semiconductor Corporation
201956
20195602
www.national.com
1 page  
Symbol
Parameter
Conditions
VA = 3V, VOUT = 3V,
Input Code = 00h
IOS
Output Short Circuit Current (sink)
VA = 5V, VOUT = 5V,
Input Code = 00h
IO
Continuous Output
Current (Note 10)
Avaliable on each DAC output
CL Maximum Load Capacitance
ZOUT DC Output Impedance
REFERENCE INPUT CHARACTERISTICS
RL = ∞
RL = 2kΩ
Input Range Minimum
VREFIN Input Range Maximum
Input Impedance
LOGIC INPUT CHARACTERISTICS
IIN Input Current (Note 10)
VIL Input Low Voltage (Note 10)
VIH Input High Voltage (Note 10)
CIN Input Capacitance (Note 10)
POWER REQUIREMENTS
VA = 3V
VA = 5V
VA = 3V
VA = 5V
Supply Voltage Minimum
VA Supply Voltage Maximum
fSCLK = 30 MHz
IN
Normal Supply Current (output
unloaded)
fSCLK = 0
VA = 2.7V
to 3.6V
VA = 4.5V
to 5.5V
VA = 2.7V
to 3.6V
VA = 4.5V
to 5.5V
IPD
Power Down Supply Current (output
unloaded, SYNC = DIN = 0V after
All PD Modes,
(Note 10)
PD mode loaded)
VA = 2.7V
to 3.6V
VA = 4.5V
to 5.5V
PN
Normal Supply Power (output
unloaded)
fSCLK = 30 MHz
fSCLK = 0
VA = 2.7V
to 3.6V
VA = 4.5V
to 5.5V
VA = 2.7V
to 3.6V
VA = 4.5V
to 5.5V
Power Down Supply Power (output
PPD
unloaded, SYNC = DIN = 0V after
All PD Modes,
(Note 10)
PD mode loaded)
VA = 2.7V
to 3.6V
VA = 4.5V
to 5.5V
Typical
(Note 9)
52
Limits
(Note 9)
Units
(Limits)
mA
75 mA
1500
1500
7.5
11 mA (max)
pF
pF
Ω
0.2 1.0 V (min)
VA V (max)
60 kΩ
±1 µA (max)
0.9 0.6 V (max)
1.5 0.8 V (max)
1.4 2.1 V (min)
2.1 2.4 V (min)
3 pF (max)
2.7 V (min)
5.5 V (max)
210 270 µA (max)
320 410 µA (max)
190 µA
290 µA
0.10 1.0 µA (max)
0.15 1.0 µA (max)
0.6 1.0 mW (max)
1.6 2.3 mW (max)
0.6 mW
1.5 mW
0.3 3.6 µW (max)
0.8 5.5 µW (max)
5 www.national.com
5 Page 
Zero Code Error vs. VA
Zero Code Error vs. VREFIN
Zero Code Error vs. fSCLK
20195630
20195631
Zero Code Error vs. Clock Duty Cycle
20195634
Zero Code Error vs. Temperature
Full-Scale Error vs. VA
20195635
20195636
11
20195637
www.national.com
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet DAC082S085.PDF ] | |
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