AD7226 Analog Devices, AD7226 Datasheet
AD7226
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AD7226 Summary of contents
Page 1
... The voltage mode configuration of the DACs allows the AD7226 to be operated from a single power supply rail. 3. Microprocessor Compatibility The AD7226 has a common 8-bit data bus with individual DAC latches, providing a versatile control architecture for simple interface to microprocessors. All latch enable signals are level triggered ...
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... AD7226–SPECIFICATIONS ( DUAL SUPPLY All specifications T Parameter STATIC PERFORMANCE Resolution Total Unadjusted Error Relative Accuracy Differential Nonlinearity Full Scale Error Full Scale Temperature Coefficient Zero Code Error Zero Code Error Temperature Coefficient REFERENCE INPUT Voltage Range Input Resistance ...
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... Specifications subject to change without notice. Model AD7226KN AD7226KP AD7226KR AD7226BQ AD7226TQ AD7226TE NOTES 1 To order MIL-STD-883, Class B processed parts, add /883B to part number. Contact your local sales office for Military data sheet, for U.S. Standard Military Drawing (SMD), see DESC drawing #5962–87802 Leadless Ceramic Chip Carrier ...
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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 AD7226 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 ...
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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 AD7226 allows a reference voltage range from + +12.5 V. Each DAC consists of a highly stable, thin-film, R-2R ladder and eight high speed NMOS, single-pole, double-throw switches ...
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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. AD7226 Truth Table AD7226 Control Inputs AD7226 WR A1 ...
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... AGND and DGND are . SS equal is to tie AGND and DGND together at the AD7226. In more complex systems where the AGND and DGND intertie is on the backplane recommended that two diodes be con- nected in inverse parallel between the AD7226 AGND and DGND pins (IN914 or equivalent). – ...
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... Mismatch between R1 and R2 causes gain and offset errors and therefore these resistors must match and track over temperature. Once again the AD7226 can be operated in single supply or from positive/negative supplies. Table III shows the digital code versus output voltage relationship for the circuit of Figure 13 with ...
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... Figure 17 shows typical resulting waveforms. The sine waves can be smoothed by filtering the D/A converter outputs. The fourth D/A converter of the AD7226, DAC D, may be used in a feedback configuration to provide a programmable refer- ence voltage for itself and the other three converters. This con- figuration is shown in Figure 15 ...
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... The upper and lower limits are those required by the AD7226 to achieve its lin- earity specification. Figure 20 shows a sine wave signal applied to the reference input of the AD7226. For input signal frequen- cies kHz the output distortion typically remains less than 0 ...
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... Figure 21 shows how the AD7226 can be used to provide pro- grammable input offset voltage adjustment for the AD544 op amp. Each output of the AD7226 can be used to trim the input offset voltage on one AD544. The 620 k resistor tied to +10 V provides a fixed bias current to one offset node. For symmetrical adjustment, this bias current should equal the current in the other offset node with the half-full scale code (i ...
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... AD7226 20-Pin Plastic (N-20) 20-Pin Cerdip (Q-20) 20-Pin SOIC (R-20) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Terminal Plastic Leaded Chip Carrier (P-20A) 20-Terminal Leadless Ceramic Chip Carrier (E-20A) –12– REV. A ...