+5 V, Serial Input a Complete 12-Bit DAC DAC8512 FEATURES FUNCTIONAL BLOCK DIAGRAM Space Saving SO-8 or Mini-DIP Packages Complete, Voltage Output with Internal Reference 1 mV/Bit with 4.095 V Full Scale V 1 DD Single +5 Volt Operation REF 12-BIT DAC 8 V OUT No External Components 12 3-Wire Serial Data Interface, 20 MHz Data Loading Rate 6 CLR DAC REGISTER Low Power: 2.5 mW LD 5 7 GND 12 APPLICATIONS CS 2 SERIAL REGISTER Portable Instrumentation CLK 3 Digitally Controlled Calibration SDI 4 Servo Controls Process Control Equipment PC Peripherals GENERAL DESCRIPTION Serial interface is high speed, three-wire, DSP compatible with The DAC8512 is a complete serial input, 12-bit, voltage output data in (SDI), clock (CLK) and load strobe (LD). There is also digital-to-analog converter designed to operate from a single a chip-select pin for connecting multiple DACs. +5 V supply. It contains the DAC, input shift register and A CLR input sets the output to zero scale at power on or upon latches, reference and a rail-to-rail output amplifier. Built using user demand. a CBCMOS process, these monolithic DACs offer the user low The DAC8512 is specified over the extended industrial (40C cost, and ease of use in +5 V only systems. to +85C) temperature range. DAC8512s are available in plas- Coding for the DAC8512 is natural binary with the MSB loaded tic DIPs and SO-8 surface mount packages. first. The output op amp can swing to either rail and is set to a range of 0 V to +4.095 Vfor a one-millivolt-per-bit resolution. It is capable of sinking and sourcing 5 mA. An on-chip reference is laser trimmed to provide an accurate full-scale output voltage of 4.095 V. 1.0 0.75 0.5 0.25 0 0.25 0.5 0.75 1.0 0 1024 2048 3072 4096 DIGITAL INPUT CODE Decimal Linearity Error vs. Digital Input Code REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties Tel: 617/329-4700 World Wide Web Site: DAC8512SPECIFICATIONS ELECTRICAL CHARACTERISTICS ( V = +5.0 V 6 5%, 408C T +858C, unless otherwise noted) DD A Parameter Symbol Condition Min Typ Max Units STATIC PERFORMANCE Resolution N Note 2 12 Bits Relative Accuracy INL E Grade 1 1/4 +1 LSB F Grade 2 3/4 +2 LSB Differential Nonlinearity DNL No Missing Codes 1 3/4 +1 LSB Zero-Scale Error V Data = 000 +1/2 +3 LSB ZSE H 3 Full-Scale Voltage V Data = FFF E Grade 4.087 4.095 4.103 V FS H F Grade 4.079 4.095 4.111 V Full-Scale Tempco TCV Notes 3, 4 16 ppm/C FS ANALOG OUTPUT Output Current I Data = 800 5 7mA OUT H Load Regulation at Full Scale L R = 402 to , Data = 800 1 3 LSB REG L H 4 Capacitive Load C No Oscillation 500 pF L LOGIC INPUTS Logic Input Low Voltage V 0.8 V IL Logic Input High Voltage V 2.4 V IH Input Leakage Current I 10 A IL Input Capacitance C 10 pF IL 1, 4 INTERFACE TIMING SPECIFICATIONS Clock Width High t 30 10 ns CH Clock Width Low t 30 10 ns CL Load Pulse Width t 20 ns LDW Data Setup t 15 10 ns DS Data Hold t 15 5 ns DH Clear Pulse Width t 30 20 ns CLRW Load Setup t 15 ns LD1 Load Hold t 10 ns LD2 Select t 30 ns CSS Deselect t 20 ns CSH 4 AC CHARACTERISTICS 5 Voltage Output Settling Time t To 1 LSB of Final Value 16 s S DAC Glitch 15 nV s Digital Feedthrough 15 nV s SUPPLY CHARACTERISTICS Positive Supply Current I V = 2.4 V, V = 0.8 V, No Load 1.5 2.5 mA DD IH IL V = 5 V, V = 0 V, No Load 0.5 1 mA DD IL Power Dissipation P V = 2.4 V, V = 0.8 V, No Load 7.5 12.5 mW DISS IH IL V = 5 V, V = 0 V, No Load 2.5 5 mW DD IL Power Supply Sensitivity PSS V = 5% 0.002 0.004 %/% DD NOTES 1 All input control signals are specified with tr = tf = 5 ns (10% to 90% of +5 V) and timed from a voltage level of 1.6 V. 2 1 LSB = 1 mV for 0 V to +4.095 V output range. 3 Includes internal voltage reference error. 4 These parameters are guaranteed by design and not subject to production testing. 5 The settling time specification does not apply for negative going transitions within the last 6 LSBs of ground. Some devices exhibit double the typical settling time in this 6 LSB region. Specifications subject to change without notice. 2 REV. A