Manufacturer Part NumberDAC124S085CIMM/NOPB
DescriptionIC DAC 12BIT QUAD R-R 10-MSOP
ManufacturerNational Semiconductor
DAC124S085CIMM/NOPB datasheet

Specifications of DAC124S085CIMM/NOPB

Settling Time6µsNumber Of Bits12
Data InterfaceDSP, MICROWIRE™, QSPI™, Serial, SPI™Number Of Converters4
Voltage Supply SourceSingle SupplyOperating Temperature-40°C ~ 105°C
Mounting TypeSurface MountPackage / Case10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Number Of Channels4Resolution12b
Interface TypeSerial (3-Wire, SPI, QSPI, Microwire)Single Supply Voltage (typ)3.3/5V
Dual Supply Voltage (typ)Not RequiredVArchitectureResistor-String
Power Supply RequirementSingleOutput TypeVoltage
Integral Nonlinearity Error±8LSBSingle Supply Voltage (min)2.7V
Single Supply Voltage (max)5.5VDual Supply Voltage (min)Not RequiredV
Dual Supply Voltage (max)Not RequiredVOperating Temp Range-40C to 105C
Operating Temperature ClassificationIndustrialMountingSurface Mount
Pin Count10Package TypeMSOP
For Use WithDAC124S085EB - BOARD EVALUATION DAC124S085Lead Free Status / RoHS StatusLead free / RoHS Compliant
Power Dissipation (max)-Other namesDAC124S085CIMM
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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 V
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.
Pin Configuration
SPI ™ is a trademark of Motorola, Inc.
© 2008 National Semiconductor Corporation
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
, providing the
Settling Time
Zero Code Error
Full-Scale Error
Supply Power
— Normal
— Power Down
Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage & Current Sources
Programmable Attenuators
November 18, 2008
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

DAC124S085CIMM/NOPB Summary of contents

  • Page 1

    ... DAC084S085 and the 10-bit DAC104S085. The DAC124S085 operates over the extended industrial tem- perature range of −40°C to +105°C. Pin Configuration SPI ™ trademark of Motorola, Inc. © 2008 National Semiconductor Corporation Features ■ Guaranteed Monotonicity ■ Low Power Operation ■ ...

  • Page 2

    Ordering Information Order Numbers DAC124S085CISD DAC124S085CISDX DAC124S085CIMM DAC124S085CIMMX DAC124S085EVAL Block Diagram www.national.com Temperature Range ≤ ≤ −40°C T +105°C A ≤ ≤ LLP Tape-and-Reel −40°C T +105°C A ≤ ≤ −40°C T +105°C A ≤ ≤ MSOP Tape-and-Reel −40°C T ...

  • Page 3

    Pin Descriptions LLP MSOP Symbol Pin No OUTA V 3 OUTB V 4 OUTC 5 V OUTD 6 GND 7 V REFIN SYNC 10 SCLK PAD 11 (LLP only) Type Supply ...

  • Page 4

    ... Absolute Maximum Ratings If 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) Package Input Current (Note 3) Power Consumption 25°C A ESD Susceptibility (Note 5) ...

  • Page 5

    Symbol Parameter I Output Short Circuit Current (sink) OS Continuous Output I O Current (Note 10) C Maximum Load Capacitance Output Impedance OUT REFERENCE INPUT CHARACTERISTICS Input Range Minimum Input Range Maximum VREFIN Input Impedance LOGIC INPUT ...

  • 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 specifications apply for 4047. Boldface limits apply for T Symbol Parameter f SCLK Frequency SCLK ...

  • Page 7

    Note 8: To guarantee accuracy required that V Note 9: Typical figures are 25°C, and represent most likely parametric norms. Test limits are guaranteed to National's AOQL (Average Outgoing Quality J Level). Note 10: This ...

  • Page 8

    Transfer Characteristic Timing Diagrams www.national.com FIGURE 1. Input / Output Transfer Characteristic FIGURE 2. Serial Timing Diagram 8 20173205 20173206 ...

  • Page 9

    Typical Performance Characteristics 4047, unless otherwise stated INL 3.0V A DNL 3.0V A INL/DNL REFIN REF A SCLK 20173252 20173254 = 3.0V A 20173256 9 ...

  • Page 10

    INL/DNL SCLK INL/DNL vs Clock Duty Cycle at V INL/DNL vs Temperature at V www.national.com = 2.7V A 20173250 = 3.0V INL/DNL vs Clock Duty Cycle 20173224 = 3.0V INL/DNL vs Temperature at ...

  • Page 11

    Zero Code Error vs 20173230 Zero Code Error vs. f SCLK 20173234 Zero Code Error vs. Temperature 20173236 Zero Code Error vs. V Zero Code Error vs. Clock Duty Cycle Full-Scale Error vs REFIN 20173231 20173235 ...

  • Page 12

    Full-Scale Error vs. V Full-Scale Error vs. Clock Duty Cycle Supply Current vs. V www.national.com REFIN 20173232 Full-Scale Error vs. Temperature 20173238 Supply Current vs. Temperature A 20173244 12 Full-Scale Error vs. f SCLK 20173233 20173239 20173245 ...

  • Page 13

    Glitch Response 20173246 Power-On Reset 13 20173247 www.national.com ...

  • Page 14

    Functional Description 1.1 DAC SECTION The DAC124S085 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 ex- ternally applied at V ...

  • Page 15

    Normally, the SYNC line is kept low for at least 16 falling edges of SCLK and the DAC is updated on the 16th SCLK falling edge. However, if SYNC is brought high before the 16th falling edge, the data transfer ...

  • Page 16

    LM4050 Available with accuracy of 0.44%, the LM4050 shunt refer- ence is also a good choice as a reference for the DAC124S085 available in 4.096V and 5V versions and comes in a space-saving 3-pin SOT23. FIGURE 6. ...

  • Page 17

    An input capacitance of 1.0µF without any ESR requirement is required at the LP3985 input, while a 1.0µF ceramic ca- pacitor with an ESR requirement of 5mΩ to 500mΩ is required at the output. Careful interpretation and understanding of the ...

  • Page 18

    DSP/MICROPROCESSOR INTERFACING Interfacing the DAC124S085 to microprocessors and DSPs is quite simple. The following guidelines are offered to hasten the design process. 2.3.1 ADSP-2101/ADSP2103 Interfacing Figure 10 shows a serial interface between the DAC124S085 and the ADSP-2101/ADSP2103. The DSP ...

  • Page 19

    Physical Dimensions inches (millimeters) unless otherwise noted 10-Lead MSOP Order Numbers DAC124S085CIMM NS Package Number MUB10A 10-Lead LLP Order Numbers DAC124S085CISD NS Package Number SDA10A 19 www.national.com ...

  • Page 20

    ... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...