MAX5851 19-3231 Rev 0 4/04 Dual, 8-Bit, 80Msps, Current-Output DAC General Description Features The MAX5851 dual, 8-bit, 80Msps, digital-to-analog 8-Bit, 80Msps Dual DAC converter (DAC) provides superior dynamic performance Low Power in wideband communication systems. The device inte- 58mW with I = 2mA at f = 80MHz FS CLK grates two 8-bit DAC cores, and a 1.24V reference. The converter supports single-ended and differential modes 2.7V to 3.6V Single Supply of operation. The MAX5851 dynamic performance is Full Output Swing and Dynamic Performance at maintained over the entire 2.7V to 3.6V power-supply 2.7V Supply operating range. The analog outputs support a -1.0V to +1.25V compliance voltage. Superior Dynamic Performance 66dBc SFDR at f = 20MHz The MAX5851 can also operate in interleave data mode OUT to reduce the I/O pin count. This allows the converter to Programmable Channel Gain Matching be updated on a single, 8-bit bus. Integrated 1.24V Low-Noise Bandgap Reference The MAX5851 features digital control of channel gain Single-Resistor Gain Control matching to within 0.4dB in sixteen 0.05dB steps. Channel matching improves sideband suppression in Interleaved Data Mode analog quadrature modulation applications. The on- Single-Ended and Differential Clock Input Modes chip 1.24V bandgap reference includes a control amplifier that allows external full-scale adjustments of Miniature 40-Pin Thin QFN Package, 6mm x 6mm both channels through a single resistor. The internal ref- EV Kit AvailableMAX5852 EV Kit erence can be disabled and an external reference may be applied for high-accuracy applications. Ordering Information The MAX5851 features full-scale current outputs of 2mA to 20mA and operates from a 2.7V to 3.6V single supply. PART TEMP RANGE PIN-PACKAGE The DAC supports three modes of power-control opera- MAX5851ETL -40C to +85C 40 Thin QFN-EP* tion: normal, low-power standby, and complete power- down. In power-down mode, the operating current is *EP = Exposed paddle. reduced to 1A. The MAX5851 is packaged in a 40-pin thin QFN with Pin Configuration exposed paddle (EP) and is specified for the extended (-40C to +85C) temperature range. TOP VIEW Pin-compatible, higher speed, and higher resolution versions are also available. Refer to the MAX5852 (8 bit, 165Msps), the MAX5854 (10 bit, 165Msps), and 40 39 38 37 36 35 34 33 32 31 the MAX5853 (10 bit, 80Msps) data sheets for more information. See Table 4. DA7/PD 1 30 CV DD EP DA6/DACEN 29 2 CGND DA5/IDE 3 28 CLK Applications DA4/REN 4 27 CV DD Communications DA3/G3 5 26 CLKXN MAX5851 VSAT, LMDS, MMDS, WLAN, 6 25 DA2/G2 CLKXP Point-to-Point Microwave Links DA1/G1 7 24 DCE Wireless Base Stations 8 23 DA0/G0 CW N.C. 9 22 N.C. Quadrature Modulation 10 21 N.C. N.C. Direct Digital Synthesis (DDS) Instrumentation/ATE 11 12 13 14 15 16 17 18 19 20 THIN QFN 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. EVALUATION KIT AVAILABLE DB7 AGND DB6 AV DD DB5 OUTPA DB4 OUTNA DB3 AGND DV OUTPB DD DGND OUTNB DB2 AV DD DB1 REFR DB0 REFODual, 8-Bit, 80Msps, Current-Output DAC ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +4V REFR, REFO to AGND .............................-0.3V to (AV + 0.3V) DD DD DV to DGND.........................................................-0.3V to +4V OUTPA, OUTNA to AGND..........(AV - 4.8V) to (AV + 0.3V) DD DD DD CV to CGND.........................................................-0.3V to +4V OUTPB, OUTNB to AGND..........(AV - 4.8V) to (AV + 0.3V) DD DD DD AV to DV .............................................................-4V to +4V Maximum Current into Any Pin DD DD AV to CV ..........................................................-0.4V to +4V (excluding power supplies)..........................................50mA DD DD DV to CV ..........................................................-0.4V to +4V Continuous Power Dissipation (T = +70C) DD DD A AGND to DGND.....................................................-0.3V to +0.3V 40-Pin Thin QFN (derate 26.3mW/C above +70C)....2105mW AGND to CGND.....................................................-0.3V to +0.3V Operating Temperature Range ...........................-40C to +85C DGND to CGND ....................................................-0.3V to +0.3V Storage Temperature Range .............................-65C to +150C DA7DA0, DB7DB0, CW, DCE to DGND ...............-0.3V to +4V Junction Temperature......................................................+150C CLK to CGND ..........................................-0.3V to (CV + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD CLKXN, CLKXP to CGND.........................................-0.3V to +4V 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 (AV = DV = CV = 3V, AGND = DGND = CGND = 0, f = 80Msps, differential clock, external reference, V = 1.2V, I = DD DD DD DAC REF FS 20mA, differential output, output amplitude = 0dBFS, T = T to T , unless otherwise noted. T +25C, guaranteed by produc- A MIN MAX A tion test. T < +25C guaranteed by design and characterization. Typical values are at T = +25C.) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCE Resolution N 8 Bits Integral Nonlinearity INL R = 0 -0.25 0.05 +0.25 LSB L Differential Nonlinearity DNL Guaranteed monotonic, R = 0 -0.15 0.05 +0.15 LSB L Offset Error V -0.1 0.2 +0.1 LSB OS Internal reference (Note1) -10 1.5 +8 Gain Error (See Also Gain Error GE %FSR Definition Section) External reference -5.5 0.7 +5.0 Internal reference 150 Gain-Error Temperature Drift ppm/C External reference 100 DYNAMIC PERFORMANCE f = 10MHz 63.3 66.5 OUT f = 80MHz, CLK f = 20MHz 66 OUT A = -1dBFS OUT f = 30MHz 65 OUT Spurious-Free Dynamic Range to SFDR dBc f = 44MHz, CLK Nyquist f = 10MHz 63 OUT A = -1dBFS OUT f = 25MHz, CLK f = 1MHz 64 OUT A = -1dBFS OUT f = 80MHz, f = 10MHz, CLK OUT 70 A = -1dBFS, span = 10MHz OUT Spurious-Free Dynamic Range f = 65MHz, f = 5MHz, CLK OUT SFDR 68 dBc Within a Window A = -1dBFS, span = 2.5MHz OUT f = 25MHz, f = 1MHz, CLK OUT 67 A = -1dBFS, span = 2MHz OUT 8 tones at 400kHz spacing, f = 78MHz, CLK Multitone Power Ratio to Nyquist MTPR 63 dBc f = 15MHz to 18.2MHz OUT 2 MAX5851