AD7228 Analog Devices, AD7228 Datasheet
AD7228
Specifications of AD7228
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AD7228 Summary of contents
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... Single or Dual Supply Operation The voltage-mode configuration of the DACs allows single supply operation of the AD7228A. The part can also be oper- ated with dual supplies giving enhanced performance for some parameters. 3. Microprocessor Compatibility ...
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... AD7228A–SPECIFICATIONS ( DUAL SUPPLY noted.) All specifications Parameter Version STATIC PERFORMANCE Resolution 8 3 Total Unadjusted Error 2 Relative Accuracy 1 Differential Nonlinearity 1 4 Full-Scale Error 1 Zero Code Error @ MIN MAX Minimum Load Resistance 2 REFERENCE INPUT 1 Voltage Range ...
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... The data is latched into the addressed DAC latch on the rising edge of WR. While WR is high, the analog outputs remain at the value corresponding to the data held in their respective latches. Table I. AD7228A Truth Table AD7228A Control Inputs ...
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... The output voltages from the con- verters have the same polarity as the reference voltage, allowing single supply operation. A novel DAC switch pair arrangement on the AD7228A allows a reference voltage range from + +10 V when operated from highly stable, thin-film, R-2R ladder and eight high-speed NMOS switches ...
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... V . Connections for unipolar output operation are REF shown in Figure 7. The AD7228A can be operated from single or dual supplies as outlined earlier. The voltage at the reference input must never be negative with respect to GND. Failure to observe this precaution may cause parasitic transistor action and possible device destruction ...
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... REF REF 256 BIPOLAR OUTPUT OPERATION Each of the DACs on the AD7228A can be individually config- ured for bipolar output operation. This is possible using one ex- ternal amplifier and two resistors per channel. Figure 8 shows a circuit used to implement offset binary coding (bipolar opera- tion) with DAC1 of the AD7228A. In this case ...
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... DACs for correct timing relationships during the calibration cycle of the instrument. Figure 10b. AD7228A Timing Deskew Circuit COARSE/FINE ADJUST The DACs on the AD7228A can be paired together to form a coarse/fine adjust function as indicated in Figure 11. The func- tion is achieved using one external op amp and a few resistors per pair of DACs. ...
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... AD7228A Figure 16. AD7228A to 68008 Interface Plastic DIP (N-24) SOIC (R-24) Figure 17. AD7228A to MCS-51 Interface OUTLINE DIMENSIONS Dimensions shown in inches and (mm). –8– Cerdip (Q-24) PLCC (P-28A) REV. A ...