DAC0808 DAC0808 8-Bit D/A Converter Literature Number: SNAS539A
DAC0808 8-Bit D/A Converter General Description Features The DAC0808 is an 8-bit monolithic digital-to-analog converter (DAC) featuring a full scale output current settling time of 150 ns while dissipating only 33 mW with ± 5V supplies. No reference current (IREF) trimming is required for most applications since the full scale output current is typically ± 1 LSB of 255 IREF/256. Relative accuracies of better than ± 0.
DAC0808 Block and Connection Diagrams (Continued) Small-Outline Package DS005687-13 Ordering Information ACCURACY OPERATING TEMPERATURE RANGE 8-bit 0˚C≤TA≤+75˚C N PACKAGE (N16A) (Note 1) DAC0808LCN Note 1: Devices may be ordered by using either order number. www.national.
Storage Temperature Range Lead Temp. (Soldering, 10 seconds) Dual-In-Line Package (Plastic) Dual-In-Line Package (Ceramic) Surface Mount Package Vapor Phase (60 seconds) Infrared (15 seconds) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
DAC0808 Electrical Characteristics (Continued) (VCC = 5V, VEE = −15 VDC, VREF/R14 = 2 mA, and all digital inputs at high logic level unless otherwise noted.) Symbol Parameter All Bits Low All Bits High Typ Max Units VCC = 5V, VEE = −5V Conditions Min 33 170 mW VCC = 5V, VEE = −15V 106 305 mW VCC = 15V, VEE = −5V 90 mW VCC = 15V, VEE = −15V 160 mW Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
DAC0808 Typical Performance Characteristics VCC = 5V, VEE = −15V, TA = 25˚C, unless otherwise noted (Continued) Output Current vs Output Voltage (Output Voltage Compliance) Output Voltage Compliance vs Temperature Typical Power Supply Current vs Temperature DS005687-18 DS005687-19 DS005687-17 Typical Power Supply Current vs VEE Typical Power Supply Current vs VCC DS005687-20 Reference Input Frequency Response DS005687-21 DS005687-22 Unless otherwise specified: R14 = R15 = 1 kΩ, C = 15 pF, pin
www.national.com 6 FIGURE 2.
DAC0808 Test Circuits DS005687-6 VI and I1 apply to inputs A1–A8. The resistor tied to pin 15 is to temperature compensate the bias current and may not be necessary for all applications. and AN = “1” if AN is at high level AN = “0” if AN is at low level FIGURE 3. Notation Definitions Test Circuit (Note 8) DS005687-7 FIGURE 4. Relative Accuracy Test Circuit (Note 8) 7 www.national.
DAC0808 Test Circuits (Continued) DS005687-8 FIGURE 5. Transient Response and Settling Time (Note 8) DS005687-9 FIGURE 6. Reference Current Slew Rate Measurement (Note 8) DS005687-10 FIGURE 7. Positive VREF (Note 8) www.national.
DAC0808 Test Circuits (Continued) DS005687-11 FIGURE 8. Negative VREF (Note 8) DS005687-12 FIGURE 9. Programmable Gain Amplifier or Digital Attenuator Circuit (Note 8) For bipolar reference signals, as in the multiplying mode, R15 can be tied to a negative voltage corresponding to the minimum input level. It is possible to eliminate R15 with only a small sacrifice in accuracy and temperature drift.
DAC0808 Application Hints der. The reference current may drift with temperature, causing a change in the absolute accuracy of output current. However, the DAC0808 has a very low full-scale current drift with temperature. (Continued) advantage of this method. Compensation involves a capacitor to VEE on pin 16, using the values of the previous paragraph. The negative reference voltage must be at least 4V above the VEE supply.
DAC0808 Physical Dimensions inches (millimeters) unless otherwise noted Small Outline Package Order Number DAC0808LCM NS Package Number M16A Dual-In-Line Package Order Number DAC0808 NS Package Number N16A 11 www.national.
DAC0808 8-Bit D/A Converter Notes 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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1.
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