MAX5302 19-1559 Rev 0 10/99 Low-Power, 12-Bit Voltage-Output DAC with Serial Interface General Description Features The MAX5302 combines a low-power, voltage-output, 12-Bit DAC with Configurable Output Amplifier 12-bit digital-to-analog converter (DAC) and a precision +5V Single-Supply Operation output amplifier in an 8-pin MAX package. It operates Low Supply Current: 0.28mA Normal Operation from a single +5V supply, drawing less than 280A of 2A Shutdown Mode supply current. Available in 8-Pin MAX The output amplifiers inverting input is available to the user, allowing specific gain configurations, remote sens- Power-On Reset Clears DAC Output to Zero ing, and high output current capability. This makes the SPI/QSPI/MICROWIRE Compatible MAX5302 ideal for a wide range of applications, includ- ing industrial process control. Other features include a Schmitt-Trigger Digital Inputs for Direct software shutdown and power-on reset. Optocoupler Interface The serial interface is SPI/QSPI/MICROWIRE com- patible. The DAC has a double-buffered input, organized as an input register followed by a DAC register. A 16-bit serial word loads data into the input register. The DAC register can be updated independently or simultaneously with the input register. All logic inputs are TTL/CMOS- logic compatible and buffered with Schmitt triggers to Ordering Information allow direct interfacing to optocouplers. PART TEMP. RANGE PIN-PACKAGE Applications MAX5302CUA 0C to +70C 8 MAX Industrial Process Control MAX5302EUA -40C to +85C 8 MAX Automatic Test Equipment Digital Offset and Gain Adjustment Motion Control Remote Industrial Control Microprocessor-Controlled Systems Functional Diagram Pin Configuration V TOP VIEW REF GND DD FB OUT DAC DAC OUT 1 8 V DD REGISTER CONTROL 2 GND CS 7 MAX5302 INPUT DIN 3 6 REF REGISTER SCLK 4 5 FB CS 16-BIT MAX5302 DIN SHIFT MAX REGISTER SCLK SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Maxim Integrated Products 1 For free samples & the latest literature: Low-Power, 12-Bit Voltage-Output DAC with Serial Interface ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Operating Temperature Ranges DD REF, OUT, FB to GND ................................-0.3V to (V + 0.3V) MAX5302CUA...................................................0C to +70C DD Digital Inputs to GND ...............................................-0.3V to +6V MAX5302EUA ................................................-40C to +85C Continuous Current into Any Pin.......................................20mA Junction Temperature......................................................+150C Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +150C A 8-Pin MAX (derate 4.10mW/C above +70C) .........330mW Lead Temperature (soldering, 10sec) .............................+300C 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 (Circuit of Figure 8, V = +5V 10%, V = +2.5V, R = 5k , C = 100pF, T = T to T , unless otherwise noted. Typical val- DD REF L L A MIN MAX ues are at T = +25C. Output buffer connected in unity-gain configuration.) A SYMBOL CONDITIONS MIN TYP MAX PARAMETER UNITS STATIC PERFORMANCEANALOG SECTION Resolution N 12 Bits Differential Nonlinearity DNL Guaranteed monotonic 1.0 LSB Integral Nonlinearity (Note 1) INL 4 LSB Offset Error V 0.3 8 mV OS Offset-Error Tempco TCV 6 ppm/C OS Gain Error (Note 1) GE -0.3 3 LSB Gain-Error Tempco 1 ppm/C Power-Supply Rejection Ratio PSRR 4.5V V 5.5V 800 V/V DD REFERENCE INPUT Reference Input Range V 0V - 1.4 V REF DD Reference Input Resistance R Code dependent, minimum at code 1554 hex 14 20 k REF MULTIPLYING-MODE PERFORMANCE Reference -3dB Bandwidth V = 0.67Vp-p 650 kHz REF Reference Feedthrough Input code = all 0s, V = 3.6Vp-p at 1kHz -84 dB REF Signal-to-Noise Plus SINAD V = 1Vp-p at 25kHz, code = full scale 77 dB REF Distortion Ratio DIGITAL INPUTS Input Voltage High V 2.4 V IH Input Voltage Low V 0.8 V IL Input Leakage Current I V = 0 or V 0.001 0.5 A IN DD IN Input Capacitance C 8 pF IN 2 MAX5302