MAX5721 19-2125 Rev 3 4/05 10-Bit, Low-Power, Dual, Voltage-Output DAC with Serial Interface General Description Features The MAX5721 dual 10-bit, low-power, buffered voltage- Ultra-Low Power Consumption output, digital-to-analog converter (DAC) is packaged 112A at V = +3.6V DD in a space-saving 8-pin MAX package (5mm 135A at V = +5.5V DD 3mm). The wide supply voltage range of +2.7V to Wide +2.7V to +5.5V Single-Supply Range +5.5V and 112A supply current accommodate low- power and low-voltage applications. DAC outputs Tiny 8-Pin MAX Package employ on-chip precision output amplifiers that swing 0.3A Power-Down Current rail-to-rail. The MAX5721s reference input accepts a voltage range from 0 to V . In power-down the refer- DD Guaranteed 10-Bit Monotonicity (1LSB DNL) ence input is high impedance, further reducing the sys- Safe Power-Up Reset to Zero Volts at DAC Output tems total power consumption. The 20MHz, 3-wire SPI, QSPI, MICROWIRE and Three Software Selectable Power-Down DSP-compatible serial interface saves board space Impedances (100k , 1k , Hi-Z) and reduces the complexity of opto- and transformer- Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE- isolated applications. The MAX5721 on-chip power-on Compatible Serial Interface reset (POR) circuit resets the DAC outputs to zero and loads the output with a 100k resistor to ground. This Rail-to-Rail Output Buffer Amplifiers provides additional safety for applications that drive Schmitt-Triggered Logic Inputs for Direct valves or other transducers that need to be off on power-up. The MAX5721s software-controlled power- Interface to Optocouplers down reduces supply current to less than 0.3A and Wide -40C to +125C Operating Temperature provides software-selectable output loads (1k , 100k , Range or high impedance) while in power-down. The MAX5721 is specified over the -40C to +125C auto- motive temperature range Applications Ordering Information Automatic Tuning PART TEMP RANGE PIN-PACKAGE Gain and Offset Adjustment MAX5721EUA -40C to +85C 8 MAX Power Amplifier Control MAX5721AUA -40C to +125C 8 MAX Process Control I/O Boards Battery-Powered Instruments VCO Control Pin Configuration TOP VIEW V 1 8 OUTB Functional Diagram appears at end of data sheet. DD GND 2 7 OUTA MAX5721 MAX is a registered trademark of Maxim Integrated Products, Inc. CS 3 6 REF SPI and QSPI are trademarks of Motorola, Inc. SCLK 4 5 DIN MICROWIRE is a trademark of National Semiconductor, Corp. MAX Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.10-Bit, Low-Power, Dual, Voltage-Output DAC with Serial Interface ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Operating Temperature Range .........................-40C to +125C DD Junction Temperature.....................................................+150C OUT , SCLK, DIN, CS, REF to GND...............-0.3 to (V +0.3V) DD Maximum Continuous Current Into Any Pin......................50mA Storage Temperature Range ............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) ................................+300C A 8-Pin MAX (derate 4.6 mW/C above +70C) ............362mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, GND = 0, V = V , R = 5k , C = 200pF, T = T to T , unless otherwise noted. Typical values are DD REF DD L L A MIN MAX V = +5V, T = +25C.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC ACCURACY (Note 1) Resolution N 10 Bits Intergral Nonlinearity Error INL (Note 2) 0.5 4 LSB Differential Nonlinearity Error DNL Guaranteed monotonic (Note 2) 1 LSB Zero-Code Error OE Code = 000 0.4 1.5 % of FS Zero-Code Error Tempco 2.3 ppm/C Gain Error GE Code = 3FF hex 3 % of FS Gain-Error Tempco 0.26 ppm/C Power-Supply Rejection Ratio PSRR Code = 3FF hex, V = 10% 58.8 dB DD REFERENCE INPUT Reference Input Voltage Range V 0 V V REF DD In operation 64 90 126 k Reference Input Impedance R REF In power-down mode 2 M Reference-Down Reference In power-down mode (Note 3) 1 10 A Current DAC OUTPUT Output Voltage Range No load (Note 4) 0 V V DD DC Output Impedance Code = 200 hex 0.8 V = +3V 15 DD Short-Circuit Current mA V = +5V 48 DD V = +3V 8 DD Wake-Up Time s V = +5V 8 DD Power-down mode = output high Output Leakage Current 18 nA impedance 2 MAX5721