DAC8222 Analog Devices, DAC8222 Datasheet
DAC8222
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DAC8222 Summary of contents
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... DAC8248 for a complete 8-bit data bus interface product.) A common bus allows the DAC8222 to be packaged in a narrow 24-lead 0.3" DIP and save PCB space. The DAC is controlled with two signals, WR and LDAC. With logic low at these inputs, the DAC registers become transparent ...
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... WR, LDAC = 0 V; DB0–DB11 = + REF A Endpoint Linearity Error DAC8222A/E/G DAC8222F/H All Grades are Guaranteed Monotonic DAC8222A/E DAC8222G DAC8222F/H (Notes 2, 7) All Digital Inputs = T = +25°C A 0000 0000 0000 T = Full Temp. Range A (Note ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the DAC8222 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. 24-Lead 0.3" ...
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... DB4 14. DB3 15. DB2 16. DB1 17. DB0 (LSB) 18. DAC A/DAC B 19. LDAC 20 22. V REF B 23 24. I OUT + DAC8222G Limit Units ± 1 LSB max ± 1 LSB max ± 4 LSB max ± max 8/15 kΩ max ± max 2.4 V min 13.5 V min 0.8 V max 1 ...
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... TYPICAL PERFORMANCE CHARACTERISTICS ° ° ° DAC8222 ...
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... DAC8222 TYPICAL PERFORMANCE CHARACTERISTICS ...
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... GENERAL CIRCUIT DESCRIPTION CONVERTER SECTION The DAC8222 contains four 12-bit registers (two input regis- ters and two DAC registers), two highly stable thin-film R-2R resistor ladder networks, and interface control logic circuitry. Also included are 24 single-pole, double-throw, NMOS transis- tor current switches ...
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... TTL and CMOS input logic levels into voltage levels to drive the internal circuitry. The digital inputs are TTL compatible at V terminal. The +15 V. The DAC8222 can use +5 V CMOS logic levels FB DD with V = +12 V; however, supply current will rise to approxi- DD mately 5 mA– ...
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... The first two cycles load both DACs as above, and the third cycle updates the outputs. The LDAC and DAC A/DAC B control pins can be tied to- gether and controlled with a single strobe. When using the DAC in this configuration, DAC B must be loaded first. DAC8222 DAC B Input Register DAC Register LATCHED ...
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... REF BIPOLAR OPERATION The bipolar (offset binary) four-quadrant operation configura- tion using the DAC8222 is shown in Figure 25 and the corre- sponding code in Table III. The circuit makes use of the OP470 a quad op amp (use four OP42s for higher speeds). Resistors R1, R2, R3, and R4 may be omitted and full-scale output voltage may be adjusted by varying and R8 ...
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... R5 (R8 for DAC B). Full-scale can also be adjusted by 1 varying V 2048 2048 2048 DAC8222 ( equals R1, R2 (R3, OUTA OUT can be adjusted OUT . Full-scale output is equal to V minus one LSB. REF REF ...
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... AGND and DGND. from + + POWER SUPPLY DECOUPLING Power supplies used with the DAC8222 should be well filtered and regulated. Local supply decoupling consisting µ µF tantalum capacitor in parallel with a 0.1 µF ceramic is highly recommended. The capacitors should be connected be- tween the V and DGND pins and at the device socket ...
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... BASIC APPLICATIONS PROGRAMMING WINDOW DETECTOR Figure 28 shows the DAC8222 used in a programmable window detector configuration. The required upper and lower limits for the test are loaded into DAC A and DAC signal at the test input is not within the programmed limits, the output will indicate a logic zero ...
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... DAC8222 ...
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Cerdip (Q-24) 0.005 (0.13) MIN 0.098 (2.49) MAX 24 13 0.310 (7.87) 0.220 (5.59 PIN 1 0.060 (1.52) 1.280 (32.51) MAX 0.015 (0.38) 0.200 (5.08) MAX 0.200 (5.08) 0.125 (3.18) 0.023 (0.58) 0.100 (2.54) 0.070 (1.78) BSC ...