link to page 7 AD580THE AD580 AS A LOW POWER, LOW VOLTAGE, output amplifier is also low power, requiring only 2.5 mA PRECISION REFERENCE FOR DATA CONVERTERS quiescent current. Its laser-trimmed offset voltage preserves the ±1/2 LSB linearity of the AD7542KN without user trims, and it The AD580 has a number of features that make it ideally suited typically settles to ±1/2 LSB in less than 3 µs. It will provide the for use with A/D and D/A data converters used in complex 0 V to –2.5 V output swing from ±5 V supplies. microprocessor-based systems. The calibrated 2.500 V output minimizes user trim requirements and allows operation from a +5V single, low voltage supply. Low power consumption (1 mA +E quiescent current) is commensurate with that of CMOS-type EOUTAD580 devices, while the low cost and small package complements the GAIN–E 500 Ω ADJUSTSYSTEMVVDDREF decreasing cost and size of the latest converters. 8-BIT DATA BUS200 Ω 1415RFB22pFD0167ID1OUT161 Figure 12 shows the AD580 used as a reference for the AD7542 D2IANALOG5AD75422OUT2AD544LINPUTD343 12-bit CMOS DAC with complete microprocessor interface. 1310119812AGND–5V The AD580 and the AD7542 are specified to operate from a AD7AD0CLRA0A1WRCSFROM SYSTEM RESET single 5 V supply, thus eliminating the need to provide a 15 V DGNDA0FROM ADDRESS BUS power supply for the sole purpose of operating a reference. The A1 012 B- FROM WR AD7542 includes three 4-bit data registers, a 12-bit DAC FROM ADDRESS DECODER 00525- register, and address decoding logic. It may thus be interfaced Figure 12. Low Power, Low Voltage Reference for the AD7542 Microprocessor-Compatible, 12-Bit DAC 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 Rev. B | Page 7 of 8 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS AD580 CHIP DIMENSIONS AND PAD LAYOUT ESD CAUTION THEORY OF OPERATION VOLTAGE VARIATION VERSUS TEMPERATURE NOISE PERFORMANCE THE AD580 AS A CURRENT LIMITER THE AD580 AS A LOW POWER, LOW VOLTAGE, PRECISION REFERENCE F OUTLINE DIMENSIONS ORDERING GUIDE