MAX512/MAX513 19-0252 Rev 2 5/96 Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial Interface General Description Features The MAX512/MAX513 contain three 8-bit, voltage-output Operate from a Single +5V (MAX512) or digital-to-analog converters (DAC A, DAC B, and DAC C). +3V (MAX513) Supply, or from Bipolar Supplies Output buffer amplifiers for DACs A and B provide voltage Low Power Consumption outputs while reducing external component count. The 1mA Operating Current output buffer for DAC A can source or sink 5mA to within <1A Shutdown Current 0.5V of V or V . The buffer for DAC B can source or DD SS sink 0.5mA to within 0.5V of V or V . DAC C is DD SS Unipolar or Bipolar Outputs unbuffered, providing a third voltage output with increased 5MHz, 3-Wire Serial Interface accuracy. The MAX512 operates with a single SPI, QSPI, and Microwire Compatible +5V 10% supply, and the MAX513 operates with a +2.7V to +3.6V supply. Both devices can also operate Two Buffered, Bipolar-Output DACs (DACs A/B) with split supplies. Independently Programmable Shutdown Mode The 3-wire serial interface has a maximum operating fre- quency of 5MHz and is compatible with SPI, QSPI, Space-Saving 14-Pin SO/DIP Packages and Microwire. The serial input shift register is 16 bits Pin and Software Reset long and consists of 8 bits of DAC input data and 8 bits for DAC selection and shutdown. DAC registers can be Ordering Information loaded independently or in parallel at the positive edge of CS. A latched logic output is also available for auxil- PART TEMP. RANGE PIN-PACKAGE iary control. MAX512CPD 0C to +70C 14 Plastic DIP Ultra-low power consumption and small packages MAX512CSD 0C to +70C 14 SO (14-pin DIP/SO) make the MAX512/MAX513 ideal for MAX512C/D 0C to +70C Dice* portable and battery-powered applications. Supply cur- Ordering Information continued at end of data sheet. rent is only 1mA, dropping to less than 1A in shutdown. * Contact factory for dice specifications. Any of the three DACs can be independently shut down. In shutdown mode, the DAC s R-2R ladder network is disconnected from the reference input, minimizing sys- Functional Diagram tem power consumption. Applications DIN CS REFAB REFC 12 12 11 Digital Gain and Offset Adjustment SCLK Programmable Attenuators 3 OUTA Programmable Current Sources DAC 8 DAC A Programmable Voltage Sources LATCH A RF Digitally Adjustable Bias Circuits VCO Tuning OUTB DAC 9 DAC B LATCH Pin Configuration B TOP VIEW DIN DAC 1 14 LOUT OUTC DAC C LATCH 10 CS C 2 I.C. 13 MAX512 SCLK 3 REFAB 12 MAX513 MAX512 RESET 4 11 REFC MAX513 V DD 5 10 OUTC LOUT LATCH GND 6 9 OUTB 14 V 7 SS 8 OUTA 4 567 V V GND RESET DD SS DIP/SO Microwire is a trademark of National Semiconductor Corp. SPI and QSPI are trademarks of Motorola Inc. Maxim Integrated Products 1 For free samples & the latest literature: Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial Interface ABSOLUTE MAXIMUM RATINGS V to GND ................................................................ -0.3V, +6V Continuous Power Dissipation (T = +70C) DD A V to GND................................................................. -6V, +0.3V Plastic DIP (derate 10.00mW/C above +70C) ............800mW SS V to V ................................................................ -0.3V, +12V SO (derate 8.33mW/C above +70C)...........................667mW DD SS Digital Inputs and Outputs to GND............... -0.3V, (V + 0.3V) CERDIP (derate 9.09mW/C above +70C)...................727mW DD REFAB ................................................ (V - 0.3V), (V + 0.3V) Operating Temperature Ranges SS DD OUTA, OUTB (Note 1)....................................................V , V MAX51 C .........................................................0C to +70C SS DD OUTC.............................................................-0.3V, (V + 0.3V) MAX51 E .......................................................-40C to +85C DD REFC..............................................................-0.3V, (V + 0.3V) MAX51 MJD ....................................................-55C to +125C DD Storage Temperature Range .............................-65C to +165C Lead Temperature (soldering, 10sec) .............................+300C Note 1: The outputs may be shorted to V , V , or GND if the package power dissipation is not exceeded. Typical short-circuit cur- DD SS rent to GND is 50mA. 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 = +4.5V to +5.5V for MAX512, V = +2.7V to +3.6V for MAX513, V = GND = 0V, REFAB = REFC = V , DD DD SS DD T = T to T , unless otherwise noted. Typical values are at T = +25C.) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCE Resolution N 8 Bits Differential Nonlinearity DNL Guaranteed monotonic 1 LSB DAC A/B (Note 2) 1.5 Integral Nonlinearity INL LSB DAC C 1 LSB Total Unadjusted Error TUE (Note 2) 1 LSB DAC A/B 100 Zero-Code Temperature V/C Coefficient DAC C 5 MAX512, 4.5V V 5.5V, DD 0.01 REFAB = REFC = 4.096V Power-Supply Rejection Ratio PSRR %/% MAX513, 2.7V V 3.6V, DD 0.015 REFAB = REFC = 2.4V REFERENCE INPUTS REFAB V V SS DD Reference Input Voltage Range V REFC GND V DD Reference Input Capacitance 25 pF REFAB (Note 3) 8 R Reference Input Resistance k REF REFC (Note 3) 12 Reference Input Resistance REFAB, REFC 2 M (shutdown mode) 2 MAX512/MAX513