MAX544/MAX545 19-1088 Rev 3 12/99 +5V, Serial-Input, Voltage-Output, 14-Bit DACs General Description Features The MAX544/MAX545 are serial-input, voltage-output, Full 14-Bit Performance Without Adjustments 14-bit digital-to-analog converters (DACs) that operate +5V Single-Supply Operation from a single +5V supply. They provide 14-bit perfor- Low Power: 1.5mW mance (0.5LSB INL and 0.9LSB DNL) over tempera- ture without any adjustments. The DAC output is 1s Settling Time unbuffered, resulting in a low supply current of 0.3mA Unbuffered Voltage Output Directly Drives 60k and a low offset error of 0.6mV. Loads The DAC output range is 0V to V For bipolar opera- REF. SPI/QSPI/MICROWIRE-Compatible Serial Interface tion, matched scaling resistors are provided in the MAX545 for use with an external precision op amp Power-On Reset Circuit Clears DAC Output to 0V (such as the MAX400), generating a V output REF (unipolar mode) swing. The MAX545 also includes Kelvin-sense con- Schmitt-Trigger Inputs for Direct Optocoupler nections for the reference and analog ground pins to Interface reduce layout sensitivity. Pin-Compatible 16-Bit Upgrades A 16-bit serial word is used to load data into the DAC (MAX541/MAX542) latch. The 10MHz, 3-wire serial interface is compatible with SPI/QSPI/MICROWIRE, and it also interfaces directly with optocouplers for applications requiring isola- Ordering Information tion. A power-on reset circuit clears the DAC output to 0V (unipolar mode) when power is initially applied. INL PART TEMP. RANGE PIN-PACKAGE The MAX544 is available in 8-pin plastic DIP and SO (LSB) packages. The MAX545 is available in 14-pin plastic MAX544ACPA 0C to +70C 8 Plastic DIP 1/2 DIP and SO packages. MAX544BCPA 0C to +70C 8 Plastic DIP 1 MAX544ACSA 0C to +70C 8 SO 1/2 Applications MAX544BCSA 0C to +70C 8 SO 1 Digital Offset and Gain Adjustment Ordering Information continued at end of data sheet. Instrumentation Industrial Process Control Automated Test Equipment Functional Diagrams Data-Acquisition Systems V DD Pin Configurations RFB TOP VIEW MAX545 R FB INV R INV REFF RFB V 1 14 DD 14-BIT DAC OUT OUT 13 INV REFS 2 MAX545 AGNDF AGNDF 3 12 DGND OUT 1 8 V DD AGNDS DATA LATCH CS AGNDS 4 11 LDAC AGND 2 7 DGND LDAC CONTROL MAX544 REFS DIN 5 10 SCLK LOGIC DIN REF 3 6 DIN 6 9 N.C. SERIAL INPUT REGISTER REFF 4 CS 5 SCLK CS 7 8 SCLK DGND DIP/SO DIP/SO Functional Diagrams continued at end of data sheet. 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: +5V, Serial-Input, Voltage-Output, 14-Bit DACs ABSOLUTE MAXIMUM RATINGS V to DGND ...........................................................-0.3V to +6V 14-Pin Plastic DIP (derate 10.00mW/C above +70C)...800mW DD CS, SCLK, DIN, LDAC to DGND ..............................-0.3V to +6V 14-Pin SO (derate 8.33mW/C above +70C) ...............667mW REF, REFF, REFS to AGND........................-0.3V to (V + 0.3V) 14-Pin Ceramic SB (derate 10.00mW/C above +70C...800mW DD AGND, AGNDF, AGNDS to DGND .......................-0.3V to +0.3V Operating Temperature Ranges OUT, INV to AGND DGND .......................................-0.3V to V MAX544 C A/MAX545 C D ..............................0C to +70C DD RFB to AGND DGND...................................................-6V to +6V MAX544 E A/MAX545 E D............................-40C to +85C Maximum Current into Any Pin............................................50mA MAX545BMJD .................................................-55C to +125C Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +150C A 8-Pin Plastic DIP (derate 9.09mW/C above +70C).....727mW Lead Temperature (soldering, 10s) .................................+300C 8-Pin SO (derate 5.88mW/C above +70C) .................471mW 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 = +5V 5%, V = +2.5V, AGND = DGND = 0, T = T to T , unless otherwise noted.) DD REF A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCEANALOG SECTION (R = ) L Resolution N 14 Bits MAX54 A 0.15 0.5 Integral Nonlinearity INL V = 5V LSB DD MAX54 B 0.15 1 Differential Nonlinearity DNL Guaranteed monotonic 0.15 0.9 LSB Zero-Code Offset Error ZSE 0.6 mV Zero-Code Tempco ZS 0.05 ppm/C TC Gain Error (Note 1) 5 LSB Gain-Error Tempco 0.1 ppm/C DAC Output Resistance R (Note 2) 6.25 k OUT R /R 1.0 FB INV Bipolar Resistor Matching MAX545 Ratio error 0.03 % Bipolar Zero Offset Error MAX545 10 LSB Bipolar Zero Tempco BZS MAX545 0.5 ppm/C TC Power-Supply Rejection PSR 4.75V V 5.25V 1.0 LSB DD REFERENCE INPUT Reference Input Range V (Note 3) 2.0 3.0 V REF Unipolar mode 11.5 Reference Input Resistance R k REF (Note 4) MAX545, bipolar mode 9.0 DYNAMIC PERFORMANCEANALOG SECTION (R = , unipolar mode) L Voltage-Output Slew Rate SR C = 10pF (Note 5) 25 V/s L 1 Output Settling Time To / LSB of FS, C = 10pF 1 s 2 L DAC Glitch Impulse Major-carry transition 10 nVs Code = 0000 hex CS = V LDAC = 0V DD Digital Feedthrough 10 nVs SCLK, DIN = 0V to V levels DD 2 MAX544/MAX545