MAX6325/MAX6341/MAX6350 1ppm/C, Low-Noise, +2.5V/+4.096V/+5V Voltage References General Description Features The MAX6325/MAX6341/MAX6350 are low-noise, preci- Ultra Low, 1ppm/C Max Tempco sion voltage references with extremely low, 0.5ppm/C Very Low, 1.5Vp-p Noise (0.1Hz to 10Hz) typical temperature coefficients and excellent, 0.02% (MAX6325) initial accuracy. These devices feature buried-zener technology for lowest noise performance. Load-regula- 0.02% Initial Accuracy (MAX6350) tion specifications are guaranteed for source and sink 15mA Output Source and Sink Current currents up to 15mA. Excellent line and load regulation and low output impedance at high frequencies make Low, 18mW Power Consumption (MAX6325) them ideal for high-resolution data-conversion systems Industry-Standard Pinout up to 16 bits. Optional Noise Reduction and Voltage Trim The MAX6325 is set for a 2.5V output, the MAX6341 is set for a 4.096V output, and the MAX6350 is set for a Excellent Transient Response 5V output. All three provide for the option of external 8-Pin SO Package Available trimming and noise reduction. Low, 30ppm/1000hr Long-Term Stability Stable for All Capacitive Loads 19-1203 Rev 1 1/01 Applications Ordering Information High-Resolution Analog-to-Digital MAX and Digital-to-Analog Converters PIN- TEMPCO PART TEMP. RANGE PACKAGE (ppm/C) High-Accuracy Reference Standard MAX6325CPA 0C to +70C 8 Plastic DIP 1.0 High-Accuracy Industrial and Process Control MAX6325CSA 0C to +70C 8 SO 1.0 MAX6325EPA -40C to +85C 8 Plastic DIP 1.5 Digital Voltmeters MAX6325ESA -40C to +85C 8 SO 1.5 ATE Equipment MAX6325MJA -55C to +125C 8 CERDIP 2.5 Precision Current Sources Ordering Information continued at end of data sheet. Functional Diagrams Typical Operating Circuit Pin ConfigurationPin Configuration TOP VIEW 8V TO 36V INPUT 1 8 I.C. IN I.C. REFERENCE OUT OUT 2 7 I.C. IN MAX6325 MAX6325 MAX6341 OUT * MAX6341 NR 3 6 2.2F MAX6350 NR MAX6350 TRIM 4 GND 5 TRIM * 2.2F GND DIP/SO Pin Configurations appear at end of data sheet. I.C. = INTERNALLY CONNECTED DO NOT USE Functional Diagrams continued at end of data sheet. *OPTIONAL UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct 19-1203 Rev 1 1/01 at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com. Pin Configuration AVAILABLEMAX6325/MAX6341/MAX6350MAX6325/MAX6341/MAX6350 1ppm/C, Low-Noise, +2.5V/+4.096V/+5V Voltage References ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) 8-Pin SO (derate 5.88mW/C above +70C)...................471mW IN ................................................................................-0.3V to 40V 8-Pin CERDIP (derate 8.00mW/C above +70C)...........640mW OUT, TRIM..................................................................-0.3V to 12V Operating Temperature Ranges NR.................................................................................-0.3V to 6V MAX63 C A.......................................................0C to +70C OUT Short-Circuit to GND Duration (V 12V)..........Continuous MAX63 E A....................................................-40C to +85C IN OUT Short-Circuit to GND Duration (V 40V) ........................5s MAX63 MJA ..................................................-55C to +125C IN OUT Short-Circuit to IN Duration (V 12V) ..............Continuous Storage Temperature Range ..............................-65C to +150C IN Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s)...................................+300C A 8-Pin Plastic DIP (derate 9.09mW/C 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 CHARACTERISTICSMAX6325 (V = +10V, I = 0mA, T = T to T , unless otherwise noted. Typical values are at T = +25C.) IN OUT A MIN MAX A PARAMETER SYMBOL CONDITIONS T MIN TYP MAX UNITS A Input Voltage Range V C, E, M836 V IN Output Voltage V MAX6325 +25C 2.499 2.500 2.501 V OUT MAX6325C A C 0.5 1.0 Output Voltage Temperature TCV MAX6325E A E 0.75 1.5 ppm/C OUT Coefficient (Note 1) MAX6325MJA M 1.0 2.5 +25C 10 18 C 30 8V V 10V IN E 35 M 45 V / OUT Line Regulation (Note 2) ppm/V V +25C 25 IN C 7 10V V 36V IN E 8 M 10 C 16 Sourcing: 0mA I 15mA E 17 OUT M 315 V / OUT Load Regulation (Note 2) ppm/mA I OUT C 16 Sinking: -15mA I 0mA E 17 OUT M 10 30 +25C 1.8 2.7 Supply Current I mA IN C, E, M 3.0 Trim-Adjustment Range V (Figure 1) C, E, M 15 25 mV OUT Turn-On Settling Time t To 0.01% of final value +25C 5 s ON 0.1Hz f 10Hz +25C 1.5 Vp-p Output Noise Voltage (Note 3) e n 10Hz f 1kHz +25C 1.3 2.8 V RMS Temperature Hysteresis (Note 4) +25C 20 ppm ppm/ Long-Term Stability V /t +25C 30 OUT 1000hr 2 Maxim Integrated