DAC082S085EVAL NSC [National Semiconductor], DAC082S085EVAL Datasheet

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DAC082S085EVAL

Manufacturer Part Number
DAC082S085EVAL
Description
8-Bit Micro Power DUAL Digital-to-Analog Converter with Rail-to-Rail Output
Manufacturer
NSC [National Semiconductor]
Datasheet
© 2006 National Semiconductor Corporation
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 con-
sumes 210 µA at 3V and 320 µA at 5V. The DAC082S085 is
packaged 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 supply voltages in the 2.7V to 3.6V range. The serial
interface is compatible with standard SPI
CROWIRE and DSP interfaces.
The reference for the DAC082S085 serves both channels
and can vary in voltage between 1V and V
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 binary 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
DAC124S085. The DAC082S085 operates over the ex-
tended industrial temperature range of −40˚C to +105˚C.
Pin Configuration
SPI
is a trademark of Motorola, Inc.
the
10-bit
DAC102S085
DS201956
and
20195601
A
, providing the
, QSPI, MI-
the
12-bit
Features
n Guaranteed Monotonicity
n Low Power Operation
n Rail-to-Rail Voltage Output
n Power-on Reset to 0V
n Simultaneous Output Updating
n Wide power supply range (+2.7V to +5.5V)
n Industry’s Smallest Package
n Power Down Modes
Key Specifications
n Resolution
n INL
n DNL
n Settling Time
n Zero Code Error
n Full-Scale Error
n Power Consumption
Applications
n Battery-Powered Instruments
n Digital Gain and Offset Adjustment
n Programmable Voltage & Current Sources
n Programmable Attenuators
— Normal
— Pwr Down
270 µA (3.6V) / 410 µA (5.5V) max
20 nA (3.6V) / 30 nA (5.5V) typ
+0.18 / −0.13 LSB (max)
PRELIMINARY
−0.75 %FS (max)
±
0.5 LSB (max)
20195602
+15 mV (max)
www.national.com
4.5 µs (max)
May 2006
8 bits

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DAC082S085EVAL Summary of contents

Page 1

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 con- sumes 210 µA ...

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... Ordering Information Order Numbers DAC082S085CISD DAC082S085CISDX DAC082S085CIMM DAC082S085CIMMX DAC082S085EVAL Block Diagram www.national.com Temperature Range −40˚C ≤ T ≤ +105˚C A −40˚C ≤ T ≤ +105˚C LLP Tape-and-Reel A −40˚C ≤ T ≤ +105˚C A −40˚C ≤ T ≤ +105˚C MSOP Tape-and-Reel ...

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Pin Descriptions LLP MSOP Symbol Pin No OUTA 3 V OUTB GND 7 V REFIN SYNC 10 SCLK PAD 11 (LLP only) Type Supply Power supply ...

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Absolute Maximum Ratings (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Voltage on any Input Pin Input Current at Any Pin (Note 3) ...

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Electrical Characteristics Values shown in this table are design targets and are subject to change before product release. The following specifica- tions apply for V = +2.7V to +5.5V ≤ T ≤ T limits apply for T : ...

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A.C. and Timing Characteristics Values shown in this table are design targets and are subject to change before product release. The following specifica- tions apply for V = +2.7V to +5.5V 252. Boldface limits apply for T ...

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Specification Definitions DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB, which 256 = V / 256. REF A DAC-to-DAC CROSSTALK is the glitch impulse transferred to a ...

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Transfer Characteristic Timing Diagrams www.national.com FIGURE 1. Input / Output Transfer Characteristic FIGURE 2. Serial Timing Diagram 8 20195605 20195606 ...

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Typical Performance Characteristics less otherwise stated INL 3.0V A DNL 3.0V A INL/DNL REFIN MHz, T SCLK 20195652 20195654 = 3.0V A 20195656 9 = 25C, Input ...

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Typical Performance Characteristics otherwise stated (Continued) INL/DNL SCLK INL/DNL vs Clock Duty Cycle at V INL/DNL vs Temperature at V www.national.com MHz, T SCLK = 2.7V A 20195650 = 3.0V INL/DNL vs Clock ...

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Typical Performance Characteristics otherwise stated (Continued) Zero Code Error vs. V Zero Code Error vs. f Zero Code Error vs. Temperature MHz, T SCLK A 20195630 Zero Code Error vs. Clock Duty Cycle SCLK 20195634 20195636 11 ...

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Typical Performance Characteristics otherwise stated (Continued) Full-Scale Error vs. V Full-Scale Error vs. Clock Duty Cycle Supply Current vs. V www.national.com MHz, T SCLK REFIN 20195632 Full-Scale Error vs. Temperature 20195638 Supply Current vs. Temperature A 20195644 ...

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Typical Performance Characteristics otherwise stated (Continued) 5V Glitch Response 3V Wake-Up Time MHz 25C, Input Code Range 3 to 252, unless SCLK A 20195646 5V Wake-Up Time 20195648 13 Power-On Reset 20195647 20195649 www.national.com ...

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Functional Description 1.1 DAC SECTION The DAC082S085 is fabricated on a CMOS process with an architecture that consists of switches and resistor strings that are followed by an output buffer. The reference voltage is externally applied at V and ...

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Functional Description 1.6 POWER-ON RESET The power-on reset circuit controls the output voltages of both DACs during power-up. Upon application of power, the DAC registers are filled with zeros and the output voltages are 0V. The outputs remain at ...

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Applications Information (Continued) LM4050, I (min) is the minimum current required by the Z LM4050 for proper regulation, and I mum DAC082S085 supply current. 2.1.3 LP3985 The LP3985 is a low noise, ultra low dropout voltage regu- lator with ...

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Applications Information (Continued) 2.3 DSP/MICROPROCESSOR INTERFACING Interfacing the DAC082S085 to microprocessors and DSPs is quite simple. The following guidelines are offered to has- ten the design process. 2.3.1 ADSP-2101/ADSP2103 Interfacing Figure 10 shows a serial interface DAC082S085 and the ...

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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Lead MSOP Order Numbers DAC082S085CIMM NS Package Number MUB10A 10-Lead LLP Order Numbers DAC082S085CISD NS Package Number SDA10A 18 ...

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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information ...

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