MAX5322 19-3150 Rev 2 10/05 10V, Dual, 12-Bit, Serial, Voltage-Output DAC General Description Features The MAX5322 dual, 12-bit, serial-interface, digital-to-ana- Unipolar or Bipolar Output-Voltage Ranges log converter (DAC) provides bipolar 5V to 10V out- Unipolar: 0 to +2 x V (Single or Dual Supply) REF puts from 12V to 15V analog power-supply voltages, or unipolar 5V to 10V outputs from a single 12V to 15V ana- Bipolar: -2 x V to +2 x V (Dual Supply) REF REF log power-supply voltage. Guaranteed INL 1 LSB (max) The MAX5322 features excellent linearity with both inte- Guaranteed Monotonic: DNL 1 LSB (max) gral nonlinearity (INL) and differential nonlinearity (DNL) guaranteed to 1 LSB (max). The device also features a 10s Settling Time to 0.5 LSB fast 10s to 0.5 LSB settling time, and a hardware-shut- Low 2.8A Shutdown Current down feature that reduces current consumption to 2.8A. The output goes to midscale at power-up in bipolar Fast 10MHz SPI-/QSPI-/MICROWIRE-Compatible mode (0V), and to zero scale at power-up in unipolar Serial Interface mode (0V). A clear input (CLR) asynchronously clears Power-On Reset Sets DAC Output to 0V the DAC register and sets the outputs to 0V. The outputs can be asynchronously updated with the load DAC Schmitt Trigger Inputs for Direct (LDAC) input. Optocoupler Interface The device features a fast 10MHz SPI-/QSPI- Serial-Data Output Allows Daisy-Chaining /MICROWIRE-compatible serial interface that operates of Devices with 3V or 5V logic. Additional features include a serial- data output (DOUT) for daisy chaining and read-back 28-Pin SSOP (8mm x 10mm) functions. The MAX5322 requires external reference volt- ages of 2V to 5.25V and is available in a 28-pin SSOP package that operates over the extended (-40C to +85C) temperature range. Ordering Information Applications Motor Control Automatic Test PART TEMP RANGE PIN-PACKAGE Equipment (ATE) Industrial Process MAX5322EAI -40C to +85C 28 SSOP Controls Analog I/O Boards Industrial Automation Data-Acquisition Systems Functional Diagram 2R 2R SW2 A1 REFA SW1 12-BIT LDAC A2 OUTA DAC A CLR SW3 12 2R INPUT DAC SW6 REGISTERS REGISTERS 12 SW4 2R 12-BIT 12 12 SW5 DAC B REFB SGNDA A3 DIN 16-BIT SHIFT REGISTER A4 OUTB SCLK 2R 2R CS SERIAL INTERFACE 2R UNI/BIPA AND CONTROL UNI/BIPB SHDN DOUT 2R V CC DIGITAL POWER MAX5322 DGND SGNDB V SS ANALOG VDD POWER AGND SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. 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.10V, Dual, 12-Bit, Serial, Voltage-Output DAC ABSOLUTE MAXIMUM RATINGS V to AGND..........................................................-0.3V to +17V REF to AGND..........................................................-0.3V to +6V DD V to AGND ..........................................................-17V to +0.3V Maximum Current into REF .............................................10mA SS V to V ..........................................................................+34V Maximum Current into Any Pin Excluding REF ...............50mA DD SS V to DGND ...........................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A AGND to DGND.....................................................-0.3V to +0.3V 28-Pin SSOP (derate 9.5mW/C above +70C) ........761.9mW SGND to AGND ...................................................-0.3V to +0.3V Operating Temperature Range ...........................-40C to +85C SCLK, DIN, CS, SHDN, UNI/BIP , CLR, Junction Temperature......................................................+150C LDAC, DOUT to DGND ..........................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C CC OUT to AGND.................................(V - 0.3V) to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C SS DD 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 (DUAL SUPPLY) (V = +15V 5%, V = -15V 5%, V = +5V 10%, AGND = DGND = SGND = 0V, V = 5V, R = 2k , C = 250pF, DD SS CC REF LOAD LOAD 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 ACCURACY Resolution N 12 Bits Integral Nonlinearity INL 1 LSB Differential Nonlinearity DNL Guaranteed monotonic 1 LSB Bipolar, code = 800hex 2 Zero-Scale Error LSB Unipolar, code = 000hex 2 Bipolar 0.9 Zero-Scale Temperature ppm Coefficient FSR/C Unipolar 0.09 Bipolar (output unloaded) 2 Gain Error LSB Unipolar (output unloaded) 2 Bipolar (output unloaded) 2 Gain-Error Temperature ppm Coefficient FSR/C Unipolar (output unloaded) 2 ANALOG OUTPUTS (OUTA, OUTB) -2 x +2 x Output Voltage Range (V + 1.5V) < V < (V - 1.5V) V SS OUT DD V V REF REF Resistive Load to GND R 2k LOAD Capacitive Load to GND C 250 pF LOAD DC Output Resistance 0.5 SGND INPUTS (SGNDA, SGNDB) Input Impedance 92 k REFERENCE INPUTS (REFA, REFB) Reference Voltage Input Range 2.00 5.25 V Input Resistance R Code = 555hex, worst-case code 15 22 k REF Reference Bandwidth V = 200mV + 5V 200 kHz REF P-P DC 2 MAX5322