MAX5812 19-2340 Rev 0 1/02 12-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC General Description Features The MAX5812 is a single, 12-bit voltage-output, digital-to- Ultra-Low Supply Current 2 analog converter (DAC) with an I C-compatible 2-wire 100A at V = 3.6V DD interface that operates at clock rates up to 400kHz. The 130A at V = 5.5V DD device operates from a single 2.7V to 5.5V supply and 300nA Low-Power Power-Down Mode draws only 100A at V = 3.6V. A low-power power- DD down mode decreases current consumption to less than Single 2.7V to 5.5V Supply Voltage 1A. The MAX5812 features three software-selectable 2 power-down output impedances: 100k , 1k , and high Fast 400kHz I C-Compatible 2-Wire Serial impedance. Other features include an internal precision Interface Rail-to-Rail output buffer and a power-on reset circuit Schmitt-Trigger Inputs for Direct Interfacing to that powers up the DAC in the 100k power-down mode. Optocouplers 2 The MAX5812 features a double-buffered I C-compatible Rail-to-Rail Output Buffer Amplifier 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 MAX5812 minimizes digital noise feedthrough by discon- necting the clock (SCL) signal from the rest of the device Read-Back Mode for Bus and Data Checking when an address mismatch is detected. Power-On Reset to Zero The MAX5812 is specified over the extended temperature Miniature 6-Pin SOT23 Package range of -40C to +85C and is available in a space-sav- ing 6-pin SOT23 package. Refer to the MAX5811 for the Ordering Information 10-bit version. PIN- TOP Applications PART TEMP RANGE PACKAGE MARK Digital Gain and Offset Adjustments MAX5812LEUT -40C to +85C 6 SOT23 AAYT Programmable Voltage and Current Sources MAX5812MEUT -40C to +85C 6 SOT23 AAYV Programmable Attenuation MAX5812NEUT -40C to +85C 6 SOT23 AAYX VCO/Varactor Diode Control MAX5812PEUT -40C to +85C 6 SOT23 AAYZ Selector Guide appears at end of data sheet. Low-Cost Instrumentation Functional Diagram appears at end of data sheet. Battery-Operated Equipment Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. 2 I C is a trademark of Philips Corporation. Typical Operating Circuit Pin Configuration V DD V TOP VIEW DD C SDA SCL R R P P R S V 1 6 OUT DD SCL V DD R S MAX5812 ADD GND 2 5 SDA OUT MAX5812 3 SCL SDA 4 R S SCL V DD R S MAX5812 SOT23 SDA OUT 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.12-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, ADD to GND........................................-0.3V to V + 0.3V Maximum Junction Temperature .....................................+150C DD Maximum Current Into Any Pin ...........................................50mA Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) A 6-Pin SOT23 (derate 9.1mW above +70C).................727mW 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, R = 5k , C = 200pF, T = T to T , unless otherwise noted. Typical values are at DD L L A MIN MAX V = +5V, T = +25C.) (Note 1) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC ACCURACY (Note 2) Resolution N 12 Bits Integral Nonlinearity INL (Note 3) 2 16 LSB Differential Nonlinearity DNL Guaranteed monotonic (Note 3) 1 LSB Code = 000 hex, V = 2.7V Zero-Code Error ZCE DD 6 40 mV o Zero-Code Error Tempco 2.3 ppm/ C Gain Error GE Code = FFF hex -0.8 -3 %FS o Gain-Error Tempco 0.26 ppm/ C DAC OUTPUT Output Voltage Range No load (Note 4) 0 V V DD DC Output Impedance Code = 800 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 or GND DD OUT DD DIGITAL INPUTS (SCL, SDA) Input High Voltage V 0.7 V V IH DD Input Low Voltage V 0.3 V V IL DD Input Hysteresis 0.05 V V DD Input Leakage Current Digital inputs = 0 or V 0.1 1A DD Input Capacitance 6pF DIGITAL OUTPUT (SDA) Output Logic Low Voltage V I = 3mA 0.4 V OL SINK Three-State Leakage Current I Digital inputs = 0 or V 0.1 1A L DD Three-State Output Capacitance 6pF DYNAMIC PERFORMANCE Voltage-Output Slew Rate SR 0.5 V/s To 1/2LSB code 400 hex to C00 hex or Voltage-Output Settling Time 412 s C00 hex to 400 hex (Note 5) 2 MAX5812