dac121s101wgmpr

Manufacturer Part Numberdac121s101wgmpr
DescriptionDac121s101qml 12-bit Micro Power Digital-to-analog Converter With Rail-to-rail Output
ManufacturerNational Semiconductor Corporation
dac121s101wgmpr datasheet
 


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12-Bit Micro Power Digital-to-Analog Converter with Rail-
to-Rail Output
General Description
The DAC121S101 is a full-featured, general purpose 12-bit
voltage-output digital-to-analog converter (DAC) that can op-
erate from a single +2.7 V to 5.5 V supply and consumes just
177 µA of current at 3.6 V. The on-chip output amplifier allows
rail-to-rail output swing and the three wire serial interface op-
erates at clock rates up to 20 MHz over the specified supply
voltage range and is compatible with standard SPI ™ , QSPI,
MICROWIRE and DSP interfaces.
The supply voltage for the DAC121S101 serves as its voltage
reference, providing the widest possible output dynamic
range. 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
consumption to less than a microWatt.
The low power consumption and small packages of the
DAC121S101 make it an excellent choice for use in battery
operated equipment.
The DAC121S101 operates over the extended temperature
range of -55°C to +125°C.
Ordering Information
NS Part Number
DAC121S101WGRQV
Flight Part
DAC121S101WGMPR
Pre-flight Prototype
DAC121S101CVAL
Ceramic Evaluation Board
SPI ™ is a trademark of Motorola, Inc.
© 2010 National Semiconductor Corporation
DAC121S101QML
Features
Total Ionizing Dose
Single Event Latch-up
Guaranteed Monotonicity
Low Power Operation
Rail-to-Rail Voltage Output
Power-on Reset to Zero Volts Output
SYNC Interrupt Facility
Wide power supply range (+2.7 V to +5.5 V)
Small Packages
Power Down Feature
Key Specifications
Resolution
DNL
Output Settling Time
Zero Code Error
Full-Scale Error
Power Dissipation
— Normal Mode 0.52 mW (3.6 V) / 1.19 mW (5.5 V) typ
— Pwr Down
Mode
Applications
Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage & Current Sources
Programmable Attenuators
SMD Part Number
NS Package Number
5962R0722601VZA
100 krad(Si)
300180
120 MeV-cm
+0.21, -0.10 LSB (typ)
−0.04 %FS (typ)
0.014 µW (3.6 V) / 0.033 µW (5.5 V) typ
Package Discription
WG10A
10LD Ceramic SOIC
WG10A
10LD Ceramic SOIC
10LD Ceramic SOIC
on Evaluation Board
May 6, 2010
100 krad(Si)
2
/mg
12 bits
12.5 µs (typ)
2.1 mV (typ)
www.national.com

dac121s101wgmpr Summary of contents

  • Page 1

    ... The DAC121S101 operates over the extended temperature range of -55°C to +125°C. Ordering Information NS Part Number DAC121S101WGRQV Flight Part DAC121S101WGMPR Pre-flight Prototype DAC121S101CVAL Ceramic Evaluation Board SPI ™ trademark of Motorola, Inc. © 2010 National Semiconductor Corporation DAC121S101QML Features ■ ...

  • Page 2

    Connection Diagrams Block Diagram www.national.com 10LD Ceramic SOIC 30018001 Top View See NS Package Number WG10A 2 30018003 ...

  • Page 3

    Absolute Maximum Ratings (Note 1, Note 2) Supply Voltage Voltage on any Input Pin −0 Input Current at Any Pin (Note 3) Maximum Output Current (Note 10) V Pin in Powerdown Mode OUT Package Input ...

  • Page 4

    DAC121S101 Electrical Characteristics DC Parameters The following specifications apply for V 4047. Boldface limits apply for T MIN Symbol Parameter STATIC PERFORMANCE Resolution Monotonicity INL Integral Non-Linearity DNL Differential Non-Linearity ZE Zero Code Error FSE Full-Scale Error GE Gain Error ...

  • Page 5

    DC Parameters (Continued) The following specifications apply for V 4047. Boldface limits apply for T MIN Symbol Parameter LOGIC INPUT I Input Current IN V Input Low Voltage IL V Input High Voltage IH C Input Capacitance IN POWER REQUIREMENTS ...

  • Page 6

    AC and Timing Characteristics The following specifications apply for V 4047. Boldface limits apply for T MIN Symbol Parameter f SCLK Frequency SCLK t Output Voltage Settling Time s SR Output Slew Rate Glitch Impulse Digital Feedthrough t Wake-Up Time ...

  • Page 7

    Radiation Electrical Characteristics The following specifications apply for V 4047. Symbol Parameter POWER REQUIREMENTS I Supply Current (output unloaded) A Operating Life Test Delta Parameters T Symbol Parameter INL Integral non-linearity ts Output voltage settling time I Supply Current (output ...

  • Page 8

    Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the ...

  • Page 9

    Specification Definitions DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB, which 4096 = V / 4096. REF A DIGITAL FEEDTHROUGH is a measure of the energy inject- ...

  • Page 10

    Transfer Characteristic Timing Diagram www.national.com FIGURE 1. Input / Output Transfer Characteristic FIGURE 2. DAC121S101 Timing 10 30018005 30018006 ...

  • Page 11

    Typical Performance Characteristics otherwise stated DNL 2.7V A INL 2.7V A DNL vs MHz 25C, Input Code Range 48 to 4047, unless SCLK A DNL at V ...

  • Page 12

    DNL vs. f 2.7V DNL vs. Clock Duty Cycle 2.7V DNL vs. Temperature www.national.com SCLK 30018050 30018056 30018026 12 5.5V DNL vs. f SCLK 30018051 5.5V DNL vs. Clock Duty Cycle 30018057 5.5V DNL vs. Temperature 30018027 ...

  • Page 13

    INL vs. f SCLK 30018028 2.7V INL vs. Clock Duty Cycle 30018030 2.7V INL vs. Temperature 30018032 5.5V INL vs. f SCLK 5.5V INL vs. Clock Duty Cycle 5.5V INL vs. Temperature 13 30018029 30018031 30018033 www.national.com ...

  • Page 14

    Zero Code Error vs. f Full-Scale Error vs. f Supply Current vs. V www.national.com Zero Code Error vs. Temperature SCLK 30018034 Full-Scale Error vs. Temperature SCLK 30018037 Supply Current vs. Temperature A 30018044 14 30018036 30018039 30018045 ...

  • Page 15

    Glitch Response 30018046 3V Wake-Up Time 30018048 Power-On Reset 5V Wake-Up Time 15 30018047 30018049 www.national.com ...

  • Page 16

    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. ...

  • Page 17

    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 shift register ...

  • Page 18

    FIGURE 8. Microwire Interface 2.2 USING REFERENCES AS POWER SUPPLIES Recall the need for a quiet supply source for devices that use their power supply voltage as a reference voltage. Since the DAC121S101 consumes very little power, a refer- ence ...

  • Page 19

    FIGURE 11. Using the LP3985 regulator 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. ...

  • Page 20

    Radiation Environments Careful consideration should be given to environmental con- ditions when using a product in a radiation environment. 3.1 Total Ionizing Dose Radiation hardness assured (RHA) products are those part numbers with a total ionizing dose (TID) level ...

  • Page 21

    Revision History Date Relased Revision 05/05/08 A 08/14/08 B Ordering Information Table Ordering Information Table, AC and 07/15/09 C Timing Electrical Characteristics Ordering Information Table, Note Section, 05/06/2010 D Operating Life Test Delta Table and Section 3.0 Radiation Environments Section ...

  • Page 22

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Pin Ceramic SOIC NS Package Number WG10A 22 ...

  • Page 23

    Notes 23 www.national.com ...

  • Page 24

    ... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...