Texas Instruments DAC1006 Manual
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Texas Instruments DAC1006 Manual

Texas Instruments DAC1006 Manual

P compatible, double-buffered d to a converters
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DAC1006,DAC1007,DAC1008
DAC1006/DAC1007/DAC1008 P Compatible, Double-Buffered D to A Converters
Literature Number: SNAS540

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Summary of Contents for Texas Instruments DAC1006

  • Page 1 DAC1006,DAC1007,DAC1008 DAC1006/DAC1007/DAC1008 P Compatible, Double-Buffered D to A Converters Literature Number: SNAS540...

  • Page 2: General Description

    Differential non-linearity selection available as special analog section of these DACs is essentially the same as that order of the DAC1020. The DAC1006 series are the 10-bit members of a family of Key Specifications microprocessor-compatible DAC’s (MICRO-DAC’s ™ ). For...

  • Page 3: Absolute Maximum Ratings

    Min. Typ. Max. Min. Typ. Max. Resolution bits Linearity Error Endpoint adjust only < < ≤+10V −10V≤V DAC1006 0.05 0.05 % of FSR DAC1007 % of FSR DAC1008 % of FSR Differential Endpoint adjust only < < Nonlinearity ≤+10V −10V≤V...
  • Page 4 V value and to indicate the true performance of the part. The “Linearity Error” specification of the DAC1006 is “0.05% of FSR (MAX).” This guarantees that after performing a zero and full scale adjustment (See Sections 2.5 and 2.6), the plot of the 1024 analog voltage outputs will each be within 0.05%xV of a straight line which passes through zero and full scale.

  • Page 5: Switching Waveforms

    Electrical Characteristics (Continued) −9 )x100 ÷ 10 which is 0.04% of FS. = 20K and V = 10V corresponds to a zero error of (200x10 Note 10: A 200 nA leakage current with R x20x10 Note 11: Human body model, 100 pF discharged through a 1.5 kΩ resistor. Switching Waveforms DS005688-2 www.national.com...

  • Page 6: Typical Performance Characteristics

    Typical Performance Characteristics Errors vs. Supply Voltage Errors vs. Temperature Write Width, t DS005688-31 DS005688-30 DS005688-29 Control Setup Time, t Data Setup Time, t Data Hold Time, t DS005688-32 DS005688-34 DS005688-33 Digital Threshold Digital Input Threshold vs. Supply Voltage vs. Temperature DS005688-35 DS005688-36 www.national.com...

  • Page 7: Block And Connection Diagrams

    Block and Connection Diagrams DAC1006/1007/1008 (20-Pin Parts) DS005688-5 Use DAC1006/1007/1008 for left justified data. DAC1006/1007/1008 (20-Pin Parts) Dual-In-Line Package DS005688-28 Top View See Ordering Information www.national.com Proof PrintDate=1998/11/17 PrintTime=11:38:08 46711 ds005688 Rev. No. 4 cmserv...
  • Page 8 GND: Ground — the ground pin for the part. On the DAC1006, 1007, and 1008, the Byte1/Byte2 must be low to transfer the 10-bit data in the input latch to the DAC 1.3 Definition of Terms...

  • Page 9: Double Buffering

    DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) a. End Point Test After Zero and FS Adj. b. Best Straight Line DS005688-37 DS005688-38 Settling Time: Settling time is the time required from a code 3.0 TTL COMPATIBLE LOGIC INPUTS ±...
  • Page 10 DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) DS005688-9 FIGURE 1. Basic Logic Threshold Loop 4.2 Op Amp Bias Current & Input Leads der current to the I output pin. These MOS switches op- OUT1 erate in the current mode with a small voltage drop across The op amp bias current (I ) CAN CAUSE DC ERRORS.
  • Page 11 DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) DIGITAL INPUT CODE DS005688-39 FIGURE 2. Current Mode Switching DS005688-40 ts µS ∞ LF356 ∞ LF351 LF357 2.4k FIGURE 3. Converting I to V 5.1.2 Providing a Bipolar Output Voltage with the DAC (−512≤D≤+511 or 1000000000≤D≤0111111111).
  • Page 12 DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) Operation is summarized in the table below: Applied 2’s Comp. 2’s Comp. Applied True Binary (Decimal) (Binary) Digital Input (Decimal) −V +511 0111111111 1111111111 1023 −1 LSB −|V |+1 LSB +256...
  • Page 13 DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) DS005688-43 DS005688-44 FIGURE 6. FIGURE 7. DIGITAL INPUT CODE DS005688-45 FIGURE 8. Voltage Mode Switching DS005688-46 FIGURE 9. Amplifying the Voltage Mode Output (Single Supply Operation) DS005688-47 FIGURE 10. Providing a Bipolar Output Voltage with a Single Op Amp www.national.com...
  • Page 14 DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) DS005688-48 FIGURE 11. Increasing the Output Voltage Swing The output voltage swing can be expanded by adding 2 re- 5.4.1 Current Switching with Unipolar Output Voltage sistors to Figure 10 as shown in Figure 11 . These added re- After doing a “zero adjust,”...
  • Page 15 For example, if your main interest in interfacing to a µP with an 8-bit data bus you will be directed to Section The DAC1006 series of products can be used in a wide va- 6.1.0. riety of operating modes. Most of the options are shown in Table 1 .
  • Page 16 DAC1006–1008 can be used. A simplified logic diagram which shows the external connections to the data bus and the internal functions of both of the data buffer registers (In- put Latch and DAC Register) is shown in Figure 16 . These parts require the MS or Hi Byte data group to be transferred on the 1st write cycle.
  • Page 17 DAC1006/1007/1008 (20-Pin Parts for Left Justified Data) DS005688-16 FIGURE 15. Fitting a 10-Bit Data Word into 16 Available Bit Locations DS005688-17 FIGURE 16. Input Connections and Controls for DAC1006/1007/1008 Left Justified Data www.national.com Proof PrintDate=1998/11/17 PrintTime=11:38:10 46711 ds005688 Rev. No. 4 cmserv...
  • Page 18 DAC1006/1007/1008 — Simple DAC1006/1007/1008 (20–Pin Parts) Hookup for a “Quick Look” (Continued) 6.2.1 Automatic Transfer This makes use of a double byte (double precision) write. The first byte (8 bits) is strobed into the input latch and the second byte causes a simultaneous strobe of the two re-...

  • Page 19: Microprocessor Interface

    DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) DS005688-21 FIGURE 17. Input Connections and Logic for DAC1006/1007/1008 with 16-Bit Data Bus Three operating modes are possible: flow through, single 6.4.1 Single Buffered buffered, or double buffered. The timing diagrams for these...
  • Page 20 7.2 DAC1006 to MC6820/1 PIA Interface data and address bus signals generate frequency compo- In Figure 19 the DAC1006 is interfaced to an M6800 system nents of 10’s of megahertz and can cause noise spikes to through an MC6820/1 Peripheral Interface Adapter (PIA). In appear at the DAC output.
  • Page 21 DAC1006/1007/1008 — Simple for eliminating noise spikes is to add a sample and hold after the DAC op amp. This also has the advantage of eliminating Hookup for a “Quick Look” (Continued) noise spikes when changing digital codes. cur every time the data bus changes state. Another method DS005688-25 FIGURE 19.
  • Page 22 DAC1006/1007/1008 — Simple Hookup for a “Quick Look” (Continued) DS005688-56 FIGURE 21. Digitally Controlled Amplifier/Attenuator 7.4 Digitally Controlled Amplifier/Attenuator To provide a digitally controlled divider, the output op amp can be eliminated. Ground the I pin of the DAC and...
  • Page 23 THIS PAGE IS IGNORED IN THE DATABOOK Proof PrintDate=1998/11/17 PrintTime=11:38:11 46711 ds005688 Rev. No. 4 cmserv...

  • Page 24: Physical Dimensions

    Ordering Information For Left Justified Data — 20-pin package. Accuracy Temperature Range 0˚ to +70˚C 0.05% (10-bit) DAC1006LCN DAC1006LCWM 0.10% (9-bit) DAC1007LCN 0.20% (8-bit) DAC1008LCN Package Outline N20A M20B Physical Dimensions inches (millimeters) unless otherwise noted Order Number DAC1006LCWM NS Package Number M20B www.national.com Proof PrintDate=1998/11/17 PrintTime=11:38:11 46711 ds005688 Rev.

  • Page 25: Life Support Policy

    Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number DAC1006LCN, DAC1007LCN or DAC1008LCN NS Package Number N20A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE- VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI- CONDUCTOR CORPORATION.

  • Page 26: Important Notice

    IMPORTANT NOTICE 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.

This manual is also suitable for:

Dac1007Dac1008

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