LTC7541A Improved Industry Standard CMOS 12-Bit Multiplying DAC FEATURES DESCRIPTION n Improved Direct Replacement for AD7541A The LTC 7541A is a 12-bit resolution multiplying digital- and AD7541 to-analog converter (DAC). n 4-Quadrant Multiplication Laser-trimmed thin-film resistors provide excellent abso- n 12-Bit End-Point Linearity: 0.5LSB DNL and INL lute accuracy. Precision matched resistors and CMOS Over Temperature circuitry result in remarkable stability with temperature n All Grades Guaranteed Monotonic and supply variations. n Maximum Gain Error: 1LSB n The LTC7541A is a superior pin compatible replacement Single 5V to 15V Supply n for the industry standard AD7541A/AD7541. Improve- TTL and CMOS Logic Compatible n ments include better typical accuracy and stability and Reduced Sensitivity to Op Amp Offset n reduced sensitivity to output amplifier offset. The LTC7541A Low Power Consumption n is also very resistant to latch-up. Virtually Latch-Up Proof n Low Cost In addition to 2-quadrant and 4-quadrant multiplying U configurations, the LTC7541A performs well in digitally APPLICATIONS programmable gain and noninverting voltage output ap- plications. Low cost, improved performance and versatil- n Motion Control Systems ity make the LTC7541A the best choice for many new n Microprocessor-Controlled Calibration designs and for upgrading existing systems. Parts are n Automatic Test Equipment available in 18-pin PDIP and 18-pin SO Wide packages. n Programmable Gain Amplifiers n Digitally Controlled Filters , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION 2-Quadrant Multiplying DAC Has Less Than 0.5LSB (Typ) Total Unadjusted Error Integral Nonlinearity Over Temperature V 1.0 IN 15V 0.5 16 17 18 0.1F 33pF V V R DD REF FB T = 85C A 1 T = 25C A OUT 1 0 LTC7541A LT 1097 V OUT + OUT 2 T = 40C A 2 GND 0.5 3 4 TO 15 7541 TA01 DIGITAL INPUTS 1.0 0 512 1024 1536 2048 2560 3072 3584 4095 DIGITAL INPUT CODE 7541A TA02 1 INTEGRAL NONLINEARITY (LSB) U ULTC7541A ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION V to GND............................................... 0.5V to 17V DD TOP VIEW ORDER PART V to GND.......................................................... 25V REF NUMBER OUT 1 1 18 R FB R to GND ........................................................... 25V FB OUT 2 2 17 V REF Digital Inputs to GND .................. 0.5V to (V + 0.5V) DD GND 3 16 V DD LTC7541ABN OUT 1, OUT 2 to GND .................. 0.5V to (V + 0.5V) DD BIT 1 (MSB) 4 15 BIT 12 (LSB) LTC7541ABSW Power Dissipation ............................................. 450mW BIT 2 5 14 BIT 11 LTC7541AJN (Derate 6mW/C Above 75C) BIT 3 6 13 BIT 10 LTC7541AKN Maximum Junction Temperature ......... 65C to 125C BIT 4 7 12 BIT 9 LTC7541AJSW Operating Temperature Range BIT 5 8 11 BIT 8 LTC7541AKSW BIT 6 9 10 BIT 7 Commercial (J, K Versions).................. 0C to 70C Industrial (B Version) ...................... 40C to 85C N PACKAGE SW PACKAGE 18-LEAD PDIP 18-LEAD PLASTIC SO WIDE Storage Temperature Range ................ 65C to 150C T = 150C, = 100C/ W (N) Lead Temperature (Soldering, 10 sec).................. 300C JMAX JA T = 150C, = 130C/ W (SW) JMAX JA Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS V = 15V, V = 10V, OUT 1 = OUT 2 = GND = 0V, T = T to T , unless otherwise specified. DD REF A MIN MAX LTC7541AJ LTC7541AK/LTC7541AB SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Accuracy Resolution l 12 12 Bits INL Integral Nonlinearity (Note 1) l 1 0.5 LSB (Relative Accuracy) DNL Differential Nonlinearity Guaranteed Monotonic, T to T l 1 0.5 LSB MIN MAX GE Gain Error (Note 2) T = 25C 6 1 LSB A T to T l 8 2 LSB MIN MAX Gain Temperature Coefficient (Note 3) l 15 15 ppm/C I Output Leakage Current (Note 4) T = 25C 5 5nA LKG A T to T l 10 10 nA MIN MAX PSRR Power Supply Rejection V = 15V 5% l 0.002 0.002 %/% DD Reference Input R V Input Resistance l 7 11 15 7 11 15 k REF REF V Input Resistance 100 100 ppm/C REF Temperature Coefficient 2 U W U W U WW