MAX5821 19-2316 Rev 1 2/05 Dual, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC General Description Features The MAX5821 is a dual, 10-bit voltage-output, digital-to- Ultra-Low Supply Current 2 analog converter (DAC) with an I C-compatible, 115A at V = 3.6V DD 2-wire interface that operates at clock rates up to 400kHz. 135A at V = 5.5V DD The device operates from a single 2.7V to 5.5V supply 300nA Low-Power Power-Down Mode 115A at V = 3.6V. A power-down mode decreases DD current consumption to less than 1A. The MAX5821 fea- Single 2.7V to 5.5V Supply Voltage tures three software-selectable power-down output 2 Fast 400kHz I C-Compatible 2-Wire impedances: 100k, 1k, and high impedance. Other features include internal precision rail-to-rail output Serial Interface buffers and a power-on reset (POR) circuit that powers up Schmitt-Trigger Inputs for Direct Interfacing the DAC in the 100k power-down mode. to Optocouplers 2 The MAX5821 features a double-buffered I C-compatible Rail-to-Rail Output Buffer Amplifiers serial interface that allows multiple devices to share a sin- gle bus. All logic inputs are CMOS-logic compatible and Three Software-Selectable Power-Down Output buffered with Schmitt triggers, allowing direct interfacing Impedances to optocoupled and transformer-isolated interfaces. The 100k, 1k, and High Impedance MAX5821 minimizes digital noise feedthrough by discon- Read-Back Mode for Bus and Data Checking necting the clock (SCL) signal from the rest of the device when an address mismatch is detected. Power-On Reset to Zero The MAX5821 is specified over the extended temperature 8-Pin MAX Package range of -40C to +85C and is available in a miniature 8- pin MAX package. Refer to the MAX5822 data sheet Ordering Information for the 12-bit version and the MAX5820 data sheet for the 8-bit version. TEMP PIN- PART ADDRESS RANGE PACKAGE Applications o o Digital Gain and Offset Adjustments MAX5821LEUA -40 C to +85 C 8 MAX 0111 00X o o MAX5821MEUA -40 C to +85 C 8 MAX 1011 00X Programmable Voltage and Current Sources Programmable Attenuation Typical Operating Circuit VCO/Varactor Diode Control Low-Cost Instrumentation V DD Battery-Operated Instrumentation V DD C Pin Configuration SCL SDA R P R P TOP VIEW V 1 8 OUTB DD R S SCL V DD GND 2 7 OUTA R S MAX5821 MAX5821 OUTA SDA ADD 3 6 REF REF OUTB SCL 4 5 SDA R S MAX V SCL DD R S MAX5821 SDA OUTA REF OUTB REF Max is a registered trademark of Maxim Integrated Products, Inc. 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.Dual, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC ABSOLUTE MAXIMUM RATINGS V , SCL, SDA to GND............................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C DD OUT , REF, ADD to GND..............................-0.3V to V + 0.3V Storage Temperature Range .............................-65C to +150C DD Maximum Current into Any Pin............................................50mA Maximum Junction Temperature .....................................+150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 8-Pin MAX (derate 4.5mW above +70C) ...................362mW 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 at V = +5V, T = +25C.) (Note 1) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC ACCURACY (NOTE 2) Resolution N 10 Bits Integral Nonlinearity INL (Note 3) 0.5 4 LSB Differential Nonlinearity DNL Guaranteed monotonic (Note 2) 0.5 LSB Zero-Code Error ZCE Code = 000 hex, V = 2.7V 6 40 mV DD o Zero-Code Error Tempco 2.3 ppm/ C Gain Error GE Code = 3FF hex -0.8 -3 %FSR o Gain-Error Tempco 0.26 ppm/ C Power-Supply Rejection Ratio PSRR Code = 3FF hex, V = 4.5V to 5.5V 58.8 dB DD DC Crosstalk 30 V REFERENCE INPUT Reference Input Voltage Range V 0 V V REF DD Reference Input Impedance 65 90 k Reference Current Power-down mode 0.3 1 A DAC OUTPUT Output-Voltage Range No load (Note 4) 0 V V DD DC Output Impedance Code = 200 hex 1.2 V = 5V, V = full scale (short to GND) 42.2 DD OUT Short-Circuit Current mA V = 3V, V = full scale (short to GND) 15.1 DD OUT V = 5V 8 DD Wake-Up Time s V = 3V 8 DD Power-down mode = high impedance, DAC Output Leakage Current 0.1 1 A V = 5.5V, V = V to GND DD OUT DD DIGITAL INPUTS (SCL, SDA) 0.7 Input High Voltage V V IH V DD 0.3 Input Low Voltage V V IL V DD 2 MAX5821