DAC104S085EVAL

Manufacturer Part NumberDAC104S085EVAL
Description10-Bit Micro Power QUAD Digital-to-Analog Converter with Rail-to-Rail Output
ManufacturerNSC [National Semiconductor]
DAC104S085EVAL datasheet
 


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DAC104S085
10-Bit Micro Power QUAD Digital-to-Analog Converter
with Rail-to-Rail Output
General Description
The DAC104S085 is a full-featured, general purpose QUAD
10-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and uses
350 µA at 3V and 500 µA at 5V. The DAC104S085 is
packaged in a 10-lead MSOP package. 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
, QSPI, MICROWIRE and DSP interfaces.
The reference for the DAC104S085 serves all four channels
and can vary in voltage between 1V and V
widest possible output dynamic range. The DAC104S085
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. All four 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
DAC104S085 make it an excellent choice for use in battery
operated equipment.
The DAC104S085 is one of a family of pin compatible DACs,
including
the
8-bit
DAC084S085
DAC124S085. The DAC104S085 operates over the ex-
tended industrial temperature range of −40˚C to +105˚C.
Pin Configuration
SPI
is a trademark of Motorola, Inc.
© 2006 National Semiconductor Corporation
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 Power Down Modes
Key Specifications
n Resolution
n INL
, providing the
n DNL
A
n Settling Time
n Zero Code Error
n Full-Scale Error
n Supply Current
— Normal
— Pwr Down
Applications
n Battery-Powered Instruments
n Digital Gain and Offset Adjustment
n Programmable Voltage & Current Sources
n Programmable Attenuators
and
the
12-bit
20195302
DS201953
June 2006
10 bits
±
2 LSB (max)
+0.35 / −0.25 LSB (max)
6 µs (max)
+15 mV (max)
−0.75 %FS (max)
485 µA (3.6V) / 650 µA (5.5V) max
20 nA (3.6V) / 30 nA (5.5V) typ
www.national.com

DAC104S085EVAL Summary of contents

  • Page 1

    DAC104S085 10-Bit Micro Power QUAD Digital-to-Analog Converter with Rail-to-Rail Output General Description The DAC104S085 is a full-featured, general purpose QUAD 10-bit voltage-output digital-to-analog converter (DAC) that can operate from a single +2.7V to 5.5V supply and uses 350 µA at ...

  • Page 2

    ... Ordering Information Order Numbers DAC104S085CIMM DAC104S085CIMMX DAC104S085EVAL Block Diagram www.national.com Temperature Range −40˚C ≤ T ≤ +105˚C A −40˚C ≤ T ≤ +105˚C MSOP Tape-and-Reel A Evaluation Board (MSOP) 2 Package Top Mark MSOP X68C X68C 20195303 ...

  • Page 3

    Pin Descriptions MSOP Symbol Pin No OUTA 3 V OUTB 4 V OUTC 5 V OUTD 6 GND 7 V REFIN SYNC 10 SCLK Type Supply Power supply input. Must be ...

  • Page 4

    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) ...

  • Page 5

    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 face limits apply for T ...

  • Page 6

    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 1011. Boldface limits apply for ...

  • Page 7

    Specification Definitions DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB, which 1024 = V / 1024. REF A DAC-to-DAC CROSSTALK is the glitch impulse transferred to a ...

  • Page 8

    Transfer Characteristic Timing Diagrams www.national.com FIGURE 1. Input / Output Transfer Characteristic FIGURE 2. Serial Timing Diagram 8 20195305 20195306 ...

  • Page 9

    Typical Performance Characteristics to 1011, unless otherwise stated INL 3.0V A DNL 3.0V A INL/DNL REFIN REF A SCLK 20195352 20195354 = 3.0V A 20195356 ...

  • Page 10

    Typical Performance Characteristics 1011, unless otherwise stated (Continued) INL/DNL SCLK INL/DNL vs Clock Duty Cycle at V INL/DNL vs Temperature at V www.national.com REF A SCLK = 2.7V A 20195350 = ...

  • Page 11

    Typical Performance Characteristics 1011, unless otherwise stated (Continued) Zero Code Error vs. V Zero Code Error vs. f Zero Code Error vs. Temperature REF A SCLK A 20195330 Zero Code Error vs. Clock Duty Cycle ...

  • Page 12

    Typical Performance Characteristics 1011, unless otherwise stated (Continued) Full-Scale Error vs. V Full-Scale Error vs. Clock Duty Cycle Supply Current vs. V www.national.com REF A SCLK REFIN 20195332 Full-Scale Error vs. Temperature 20195338 Supply Current ...

  • Page 13

    Typical Performance Characteristics 1011, unless otherwise stated (Continued) 5V Glitch Response MHz, T REF A SCLK 20195346 13 = 25C, Input Code Range Power-On Reset 20195347 www.national.com ...

  • Page 14

    Functional Description 1.1 DAC SECTION The DAC104S085 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 ...

  • Page 15

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

  • Page 16

    Applications Information (Continued) LM4050, I (min) is the minimum current required by the Z LM4050 for proper regulation, and I mum DAC104S085 supply current. 2.1.3 LP3985 The LP3985 is a low noise, ultra low dropout voltage regu- lator with ...

  • Page 17

    Applications Information (Continued) 2.3 DSP/MICROPROCESSOR INTERFACING Interfacing the DAC104S085 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 DAC104S085 and the ...

  • Page 18

    Physical Dimensions inches (millimeters) unless otherwise noted 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 ...