MAX5742 19-2122 Rev 2 7/03 12-Bit, Low-Power, Quad, Voltage-Output DAC with Serial Interface General Description Features The MAX5742 quad, 12-bit, low-power, buffered volt- Ultra-Low Power Consumption age-output, digital-to-analog converter (DAC) is pack- 229A at V = +3.6V DD aged in a space-saving 10-pin MAX package (5mm 271A 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 229A supply current accommodates low- power and low-voltage applications. DAC outputs 10-Pin MAX Package employ on-chip precision output amplifiers that swing 0.3A Power-Down Current Rail-to-Rail . The MAX5742s reference input accepts a voltage range from 0 to V . In power-down the refer- DD Guaranteed 12-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 MAX5742 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 MAX5742s software-controlled power- Interfacing 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 MAX5742 is specified over the -40C to +125C automotive tem- perature range. Ordering Information Applications Automatic Tuning PART TEMP RANGE PIN-PACKAGE MAX5742EUB -40C to +85C 10 MAX Gain and Offset Adjustment MAX5742AUB -40C to +125C 10 MAX Power Amplifier Control Process Control I/O Boards Battery-Powered Instruments VCO Control Pin Configuration TOP VIEW CS 1 10 OUTD Functional Diagram appears at end of data sheet. SCLK 2 9 OUTC MAX5742 V 3 8 OUTB DD Rail-to-Rail is a registered trademark of Nippon Motorola, Inc. GND 4 7 OUTA SPI and QSPI are trademarks of Motorola, Inc. DIN 5 6 REF 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.12-Bit, Low-Power, Quad, Voltage-Output DAC with Serial Interface ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Operating Temperature Range .........................-40C to +125C DD OUT , SCLK, DIN, CS, REF to GND...............-0.3 to (V +0.3V) Junction Temperature.......................................-65C to +150C 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 10-Pin MAX (derate 6.9 mW/C above +70C) ..........555mW 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 12 Bits Integral Nonlinearity Error INL (Note 2) 2 16 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 = FFF hex 3 % of FS Gain-Error Tempco 0.26 ppm/C Power-Supply Rejection Ratio PSRR Code = FFF hex, V = 10% 58.8 dB DD REFERENCE INPUT Reference Input Voltage Range V 0V V REF DD In operation 32 45 63 k Reference Input Impedance R REF In power-down mode 2 M Power-Down Reference Current In power-down mode (Note 3) 1 10 A DAC OUTPUT Output Voltage Range No load (Note 4) 0 V V DD DC Output Impedance Code = 800 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 MAX5742