MAX5222 19-1720 Rev 0 4/00 Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 General Description Features The MAX5222 contains two 8-bit, buffered, voltage-out- Operates from a Single +2.7V to +5.5V Supply put digital-to-analog converters (DAC A and DAC B) in a Tiny 8-Pin SOT23 Package (3mm 3mm) small 8-pin SOT23 package. Both DAC outputs can Dual Buffered Voltage Output source and sink 1mA to within 100mV of ground and V . The MAX5222 operates with a single +2.7V to DD Low Power Consumption +5.5V supply. 0.4mA Operating Current The device uses a 3-wire serial interface, which oper- <1A Shutdown Current ates at clock rates up to 25MHz and is compatible with Programmable Shutdown Mode SPI, QSPI, and MICROWIRE interface standards. 25MHz, 3-Wire Serial Interface The serial input shift register is 16 bits long and con- sists of 8 bits of DAC input data and 8 bits for DAC SPI, QSPI, and MICROWIRE Compatible selection and shutdown control. DAC registers can be loaded independently or in parallel at the positive edge of CS. The MAX5222s ultra-low power consumption and tiny Ordering Information 8-pin SOT23 package make it ideal for portable and battery-powered applications. Supply current is less PART TEMP. RANGE PIN-PACKAGE than 1mA and drops below 1A in shutdown mode. In MAX5222EKA-T -40C to +85C 8 SOT23-8 addition, the reference input is disconnected from the REF pin during shutdown, further reducing the systems total power consumption. Functional Diagram Applications Digital Gain and Offset Adjustment Programmable Current Source Programmable Voltage Source 0.22 F 0.1 F (OPTIONAL) Power-Amp Bias Control V 83DIN DD 7 REF VCO Tuning SCLK 4 OUTA V OUTA Pin Configuration DAC 5 DAC A LATCH A TOP VIEW OUTB V OUTB DAC 6 LATCH DAC B B 1 8 CS DIN CS 1 MAX5222 2 7 GND REF MAX5222 3 6 OUTB V DD 4 5 SCLK OUTA 2 GND SOT23-8 SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. 16-BIT SHIFT REGISTER CONTROL (8) DATA (8)Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 ABSOLUTE MAXIMUM RATINGS V to GND............................................................. -0.3V to +6V Operating Temperature Range ...........................-40C to +85C DD All Other Pins to GND (Note 1).................. -0.3V to (V + 0.3V) Junction Temperature......................................................+150C DD Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +150C A 8-Pin SOT23 (derate 8.7mW/C above +70C)............696mW Lead Temperature (soldering, 10s) .................................+300C Note 1: The outputs may be shorted to V or GND if the package power dissipation is not exceeded. Typical short-circuit current to DD GND is 70mA. 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, REF = V , T = T to T , unless otherwise noted. Typical values are at T = +25C.) DD DD A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCE Resolution N 8 Bits Differential Nonlinearity DNL Guaranteed monotonic 0.3 1 LSB Integral Nonlinearity INL (Note 2) 0.3 1 LSB Total Unadjusted Error TUE (Note 2) 1 LSB Zero-Code Offset V 10 mV ZS Zero-Code Temperature TC 100 V/C VZS Coefficient 4.5V V 5.5V, V = 4.096V 0.15 DD REF Power-Supply Rejection Ratio PSRR mV/V 2.7V V 3.6V, V = 2.4V 0.5 DD REF REFERENCE INPUT Reference Input Voltage Range GND V V DD Reference Input Capacitance 25 pF Reference Input Resistance R (Note 3) 816 k REF Reference Input Resistance 2 M (Shutdown Mode) DAC OUTPUTS Output Voltage Range 0 REF V Capacitive Load at OUT 100 pF Output Resistance 50 DIGITAL INPUTS Input High Voltage V 0.7 x V V IH DD Input Low Voltage V 0.3 x V V IL DD Input Current I V = 0 or V 0.1 10 A IN IN DD Input Capacitance C (Note 4) 10 pF IN 2 MAX5222