DAC1006 National Semiconductor, DAC1006 Datasheet

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... DAC1006 DAC1007 DAC1008 P Compatible Double-Buffered Converters General Description The DAC1006 7 8 are advanced CMOS Si-Cr 10- 9- and 8-bit accurate multiplying DACs which are designed to inter- face directly with the 8080 8048 8085 Z-80 and other pop- ular microprocessors These DACs appear as a memory lo- ...

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... REF s a DAC1006 DAC1007 DAC1008 Monotonicity MIN MAX 10V REF s a DAC1006 DAC1007 DAC1008 Gain Error Using internal R fb 10V REF s a Gain Error Tempco MIN MAX Using internal R fb Power Supply All digital inputs ...

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... Note 7 The unit ‘‘FSR’’ stands for ‘‘Full Scale Range ’’ ‘‘Linearity Error’’ and ‘‘Power Supply Rejection’’ specs are based on this unit to eliminate dependence on a particular 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 REF ...

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Switching Waveforms Typical Performance Characteristics Errors vs Supply Voltage Control Setup Time t CS Digital Threshold vs Supply Voltage TL H 5688 – 2 Errors vs Temperature Write Width t Data Setup Time t Data Hold Time t DS Digital ...

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... Block and Connection Diagrams DAC1006 1007 1008 (20-Pin Parts) DAC1006 1007 1008 Simple Hookup for a ‘‘Quick Look’’ A TOTAL OF 10 INPUT SWITCHES 1K RESISTORS Notes 1 For V 10 240 V the output voltage steps are approximately 10 mV each eb REF DC 2 SW1 is a normally closed switch While SW1 is closed the DAC register is latched and new data ...

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... GND Ground the ground pin for the part 1 3 Definition of Terms Resolution Resolution is directly related to the number of switches or bits within the DAC For example the DAC1006 10 has 2 or 1024 steps and therefore has 10-bit resolution Linearity Error Linearity error is the maximum deviation ...

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... Full-scale settling time requires a zero to full-scale or full-scale to zero output change Full-Scale Error Full scale error is a measure of the output error between an ideal DAC and the actual device output Ideally for the DAC1006 series full-scale is V For V 10V and unipolar operation eb ...

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Op Amp Bias Current Input Leads The op amp bias current (I ) CAN CAUSE DC ERRORS BI- B FET TM op amps have very low bias current and therefore the error introduced is negligible BI-FET op amps ...

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Figure 4 where the sign of the reference voltage has been changed to provide a positive output voltage Note that the output current I now flows through the R OUT1 pin Providing a Bipolar Output ...

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Analog Operation in the Voltage Switching Mode Some useful application circuits result if the R-2R ladder is operated in the voltage switching mode There are two very important things to remember when using the DAC in the voltage ...

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FIGURE 10 Providing a Bipolar Output Voltage with a Single Op Amp FIGURE 11 Increasing the Output Voltage Swing The output voltage swing can be expanded by adding 2 resistors to Figure 10 as shown in Figure 11 These added ...

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Current Switching with Bipolar Output Voltage The circuit of Figure 12 shows the 3 adjustments needed The first step is to set all of the digital inputs LOW (to force and then trim ‘‘zero ...

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... FIGURE 14 Voltage Switching with a Bipolar Output Voltage 6 0 DIGITAL CONTROL DESCRIPTION The DAC1006 series of products can be used in a wide variety of operating modes Most of the options are shown in Table 1 Also shown in this table are the section numbers of this data sheet where each of the operating modes is ...

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... DAC1006 1007 1008 (20-Pin Parts for Left Justified Data) FIGURE 15 Fitting a 10-Bit Data Word into 16 Available Bit Locations FIGURE 16 Input Connections and Controls for DAC1006 1007 1008 Left Justified Data parts require the Byte data group to be transferred on the 1st write cycle ...

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... Transfer Using an External Strobe This is similar to the previous operation except the XFER signal is not provided by the P The timing diagram for this is DAC1006 1007 1008 (20-Pin Parts 5688– Interfacing to a 16-Bit Data Bus The interface to a 16-bit data bus is easily handled by con- ...

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... FIGURE 17 Input Connections and Logic for DAC1006 1007 1008 with 16-Bit Data Bus Three operating modes are possible flow through single buffered or double buffered The timing diagrams for these are shown below Single Buffered DAC1006 1007 1008 (20-Pin Parts Double Buffered ...

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... MICROPROCESSOR INTERFACE The logic functions of the DAC1006 family have been ori- ented towards an ease of interface with all popular Ps The following sections discuss in detail a few useful interface schemes 7 1 DAC1001 INS8080A Interface Figure 18 illustrates the simplicity of interfacing the DAC1006 to an INS8080A based microprocessor system ...

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... DAC1006 to MC6820 1 PIA Interface In Figure 19 the DAC1006 is interfaced to an M6800 system through an MC6820 1 Peripheral Interface Adapter (PIA) In this case the CS pin of the DAC is grounded since the PIA is ...

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FIGURE 20 Isolating Data Bus from DAC Circuitry to Eliminate Digital Noise Coupling FIGURE 21 Digitally Controlled Amplifier Attenuator 7 4 Digitally Controlled Amplifier Attenuator An unusual application of the DAC Figure 21 applies the input voltage via the on-chip ...

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... FIGURE 22 Digital to Synchro Converter Ordering Information For Left Justified Data Accuracy 0 05% (10-bit) 0 10% (9-bit) 0 20% (8-bit) Package Outline 20-pin package Temperature Range DAC1006LCN DAC1006LCWM DAC1007LCN DAC1008LCN N20A M20B 5688– 27 ...

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... Physical Dimensions inches (millimeters) Order Number DAC1006LCWM NS Package Number M20B 21 ...

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... Physical Dimensions inches (millimeters) (Continued) Order Number DAC1006LCN DAC1007LCN or DAC1008LCN LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or ...