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PDF DAC124S085 Data sheet ( Hoja de datos )
| Número de pieza | DAC124S085 | |
| Descripción | 12-Bit Micro Power QUAD Digital-to-Analog Converter | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DAC124S085 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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January 2007
DAC124S085
12-Bit Micro Power QUAD Digital-to-Analog Converter with
Rail-to-Rail Output
General Description
The DAC124S085 is a full-featured, general purpose QUAD
12-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and consumes
1.1 mW at 3V and 2.4 mW at 5V. The DAC124S085 is pack-
aged in 10-lead LLP and MSOP packages. The 10-lead LLP
package makes the DAC124S085 the smallest QUAD DAC
in its class. The on-chip output amplifier allows rail-to-rail out-
put 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 DAC124S085 serves all four channels
and can vary in voltage between 1V and VA, providing the
widest possible output dynamic range. The DAC124S085 has
a 16-bit input shift register that controls the outputs to be up-
dated, the mode of operation, the powerdown condition, and
the binary input data. All four outputs can be updated simul-
taneously 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
DAC124S085 make it an excellent choice for use in battery
operated equipment.
The DAC124S085 is one of a family of pin compatible DACs,
including the 8-bit DAC084S085 and the 10-bit DAC104S085.
The DAC124S085 operates over the extended industrial tem-
perature 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
12 bits
±8 LSB (max)
+0.7 / −0.5 LSB (max)
8.5 µs (max)
+15 mV (max)
−0.75 %FS (max)
1.1 mW (3V) / 2.4 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
20173201
SPI™ is a trademark of Motorola, Inc.
© 2007 National Semiconductor Corporation
201732
20173202
www.national.com
1 page  
Symbol
Parameter
Conditions
VA = 3V, VOUT = 3V,
Input Code = 000h
IOS
Output Short Circuit Current (sink)
VA = 5V, VOUT = 5V,
Input Code = 000h
IO
Continuous Output
Current (Note 10)
Available 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)
30 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)
360 485 µA (max)
480 650 µA (max)
330 µA
440 µA
0.10 1.0 µA (max)
0.15 1.0 µA (max)
1.1 1.7 mW (max)
2.4 3.6 mW (max)
1.0 mW
2.2 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
20173230
20173231
Zero Code Error vs. Clock Duty Cycle
20173234
Zero Code Error vs. Temperature
Full-Scale Error vs. VA
20173235
20173236
11
20173237
www.national.com
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet DAC124S085.PDF ] | |
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