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AD580UH883B 数据表(PDF) 7 Page - Analog Devices |
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AD580UH883B 数据表(HTML) 7 Page - Analog Devices |
7 / 8 page AD580 Rev. B | Page 7 of 8 THE AD580 AS A LOW POWER, LOW VOLTAGE, PRECISION REFERENCE FOR DATA CONVERTERS The AD580 has a number of features that make it ideally suited for use with A/D and D/A data converters used in complex microprocessor-based systems. The calibrated 2.500 V output minimizes user trim requirements and allows operation from a single, low voltage supply. Low power consumption (1 mA quiescent current) is commensurate with that of CMOS-type devices, while the low cost and small package complements the decreasing cost and size of the latest converters. Figure 12 shows the AD580 used as a reference for the AD7542 12-bit CMOS DAC with complete microprocessor interface. The AD580 and the AD7542 are specified to operate from a single 5 V supply, thus eliminating the need to provide a 15 V power supply for the sole purpose of operating a reference. The AD7542 includes three 4-bit data registers, a 12-bit DAC register, and address decoding logic. It may thus be interfaced directly to a 4-, 8- or 16-bit data bus. Only 8 mA of quiescent current from the single 5 volt supply is required to operate the AD7542 which is packaged in a small, 16-pin DIP. The AD544 output amplifier is also low power, requiring only 2.5 mA quiescent current. Its laser-trimmed offset voltage preserves the ±1/2 LSB linearity of the AD7542KN without user trims, and it typically settles to ±1/2 LSB in less than 3 µs. It will provide the 0 V to –2.5 V output swing from ±5 V supplies. 7 D0 6 D1 5 D2 4 D3 AD7542 CLR 13 FROM SYSTEM RESET FROM ADDRESS BUS A0 10 A0 A1 11 A1 WR 9 FROM WR CS 812 3 15 14 16 1 2 FROM ADDRESS DECODER AD7 AD0 SYSTEM 8-BIT DATA BUS AD544L DGND –5V ANALOG INPUT AGND IOUT2 IOUT1 RFB VREF VDD 22pF 200 Ω 500 Ω GAIN ADJUST EOUT +E +5V –E AD580 Figure 12. Low Power, Low Voltage Reference for the AD7542 Microprocessor-Compatible, 12-Bit DAC |
类似零件编号 - AD580UH883B |
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类似说明 - AD580UH883B |
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