Manufacturer Part NumberDAC121S101
ManufacturerTexas Instruments
DAC121S101 datasheet

Specifications of DAC121S101

Resolution(bits)12Dac: Channels1
InterfaceSerial SPIOutput TypeVoltage
Output Range Max.(v Or Ma)5.5Settling Time(µs)8
Reference: TypeSupplyPower Consumption(typ)(mw)0.63
Pin/package6SOT, 8VSSOP  
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DAC121S101/DAC121S101Q 12-Bit Micro Power, RRO Digital-to-Analog Converter
Literature Number: SNAS265H

DAC121S101 Summary of contents

  • Page 1

    ... DAC121S101 DAC121S101/DAC121S101Q 12-Bit Micro Power, RRO Digital-to-Analog Converter Literature Number: SNAS265H ...

  • Page 2

    ... The DAC121S101 operates over the extended industrial tem- perature range of −40°C to +105°C while the DAC121S101Q operates over the Grade 1 automotive temperature range of −40°C to +125°C. The DAC121S101 is available in a 6-lead TSOT and an 8-lead MSOP and the DAC121S101Q is avail- able in the 6-lead TSOT only. ...

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    ... Ordering Information Order Numbers DAC121S101CIMM DAC121S101CIMMX DAC121S101CIMK DAC121S101CIMKX DAC121S101QCMK DAC121S101QCMKX DAC121S101EVAL Block Diagram Pin Descriptions TSOT MSOP (SOT-23) Symbol Pin No. Pin No OUT 2 8 GND SCLK 6 5 SYNC www.national.com Temperature Range Package ≤ ≤ ...

  • Page 4

    ... Output Voltage Range ZCO Zero Code Output FSO Full Scale Output Maximum Load Capacitance DC Output Impedance Operating Ratings (Note 1, Note Operating Temperature Range DAC121S101 DAC121S101Q Supply Voltage, V 6.5V Any Input Voltage −0. 0.3V) Output Load SCLK Frequency 20 mA Package Thermal Resistances See ...

  • Page 5

    Symbol Parameter I Output Short Circuit Current OS LOGIC INPUT I Input Current (Note 10 Input Low Voltage (Note IL V Input High Voltage (Note IH C Input Capacitance (Note IN POWER REQUIREMENTS I Supply Current (output unloaded) ...

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    A.C. and Timing Characteristics The following specifications apply for V range 48 to 4047. Boldface limits apply for T Symbol Parameter f SCLK Frequency SCLK Output Voltage Settling Time t s (Note 10) SR Output Slew Rate Glitch Impulse Digital ...

  • Page 7

    ... REF where V is the supply voltage for this product, and "n" is REF the DAC resolution in bits, which is 12 for the DAC121S101. www.national.com ) for this device is 150°C. The maximum allowable power dissipation is dictated by T JMAX ), and can be calculated using the formula 300 300 mV below GND will not damage this device ...

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    ... Transfer Characteristic FIGURE 1. Input / Output Transfer Characteristic Timing Diagram FIGURE 2. DAC121S101 Timing 7 20114905 20114906 www.national.com ...

  • Page 9

    Typical Performance Characteristics otherwise stated DNL 3.0V A INL 3.0V A TUE 3.0V A www.national.com MHz 25C, Input Code Range 48 to 4047, unless SCLK A ...

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    DNL vs 20114922 3V DNL vs. f SCLK 20114950 3V DNL vs. Clock Duty Cycle 20114924 INL vs DNL vs. f SCLK 5V DNL vs. Clock Duty Cycle 9 20114923 20114951 20114925 www.national.com ...

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    DNL vs. Temperature 3V INL vs INL vs. Clock Duty Cycle www.national.com 20114926 SCLK 20114928 20114930 10 5V DNL vs. Temperature 20114927 5V INL vs. f SCLK 20114929 5V INL vs. Clock Duty Cycle 20114931 ...

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    INL vs. Temperature 20114932 Zero Code Error vs. f SCLK 20114934 Zero Code Error vs. Temperature 20114936 5V INL vs. Temperature Zero Code Error vs. Clock Duty Cycle Full-Scale Error vs 20114933 20114935 SCLK 20114937 www.national.com ...

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    Full-Scale Error vs. Clock Duty Cycle Supply Current vs Glitch Response www.national.com Full-Scale Error vs. Temperature 20114938 Supply Current vs. Temperature A 20114944 20114946 12 20114939 20114945 Power-On Reset 20114947 ...

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    Wake-Up Time 20114948 5V Wake-Up Time 13 20114949 www.national.com ...

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    ... Functional Description 1.1 DAC SECTION The DAC121S101 is fabricated on a CMOS process with an architecture that consists of switches and a resistor string that are followed by an output buffer. The power supply serves as the reference voltage. The input coding is straight binary with an ideal output voltage of: ...

  • Page 16

    ... Interface A serial interface between the DAC121S101 and the 68HC11 microcontroller is shown in DAC121S101 is driven from a port line (PC7 in the figure), similar to the 80C51/80L51. The 68HC11 should be configured with its CPOL bit as a zero and its CPHA bit as a one. This configuration causes data on the MOSI output to be valid on the falling edge of SCLK ...

  • Page 17

    ... LM4050 Available with accuracy of 0.44%, the LM4050 shunt refer- ence is also a good choice as a power regulator for the DAC121S101. It does not come Volt version, but 4.096V and 5V versions are available. It comes in a space-saving 3- pin SOT23. FIGURE 10. The LM4050 as a power supply ...

  • Page 18

    ... ESR values that may be too high at low tem- peratures. 2.3 BIPOLAR OPERATION The DAC121S101 is designed for single supply operation and thus has a unipolar output. However, a bipolar output may be obtained with the circuit in an output voltage range of ±5 Volts. A rail-to-rail amplifier should be used if the amplifier supplies are limited to ± ...

  • Page 19

    ... OS ous return path below their traces. 0 µA The DAC121S101 power supply should be bypassed with a 10µF and a 0.1µF capacitor as close as possible to the device 620 µA with the 0.1µF right at the device supply pin. The 10µF ca- pacitor should be a tantalum type and the 0.1µF capacitor ...

  • Page 20

    ... Physical Dimensions inches (millimeters) unless otherwise noted Order Numbers DAC121S101CIMK and DAC121S101QCMK 8-Lead MSOP Order Number DAC121S101CIMM NS Package Number MUA08A 6-Lead TSOT NS Package Number MK06A 19 www.national.com ...

  • Page 21

    For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com 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 ...

  • Page 22

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...