MAX5426 19-2318 Rev 0 1/02 Precision Resistor Network for Programmable Instrumentation Amplifiers General Description Features The MAX5426 is a precision resistor network optimized Differential Gains: A = 1, 2, 4, 8 V for use with programmable instrumentation amplifiers. Gain Accurate to 0.025%, 0.09%, or 0.5% The MAX5426 operates from dual 5V to 15V supplies and consumes less than 40A of supply current. Dual Supply 5V to 15V Operation Designed to be used in the traditional three op amp Low 36A Supply Current instrumentation amplifier topology, this device provides noninverting gains of 1, 2, 4, and 8 that are accurate to Simple CMOS/TTL Logic Compatible 2-Wire 0.025% (A-grade), 0.09% (B-grade), or 0.5% Parallel Interface (C-grade) over the extended temperature range (-40C Space-Saving 14-Pin TSSOP Package to +85C). The MAX5426 is available in the 6.4mm 5mm 14-pin TSSOP package. (6.4mm 5mm) OFFSET Pin Available to Offset the Output of the Differential Amplifier Applications Ordering Information General-Purpose Programmable Instrumentation Amplifiers TEMP PIN- PART GAIN Gain Control in RF Power Amplifiers RANGE PACKAGE MAX5426AEUD -40C to +85C 14 TSSOP 0.025% Precision Dual Attenuator MAX5426BEUD -40C to +85C 14 TSSOP 0.09% MAX5426CEUD -40C to +85C 14 TSSOP 0.5% Pin Configuration and Functional Diagram appear at end of data sheet. Typical Operating Circuit V IN- FB1 OUT1 INDIF- V DD D0 OUT D1 V OUT CM MAX5426 OFFSET V GND FB2 OUT2 INDIF+ SS V IN+ 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.Precision Resistor Network for Programmable Instrumentation Amplifiers ABSOLUTE MAXIMUM RATINGS V to GND............................................................-0.3V to +17V Maximum Current from OUT1 to INDIF- or OUT............0.72mA DD V to GND.............................................................-17V to +0.3V Maximum Current from OUT2 to INDIF+ or OFFSET.....0.72mA SS D0, D1 to GND ...........................................-0.3V to (V + 0.2V) Continuous Power Dissipation (T = +70C) DD A D0, D1 to GND (V > +6V) .................................-0.3V to +6.0V 14-Pin TSSOP (derate 9.1mW/C above +70C) ..........727mW DD All Other Pins to GND ......................(V - 0.3V) to (V + 0.2V) Operating Temperature Range ...........................-40C to +85C SS DD Maximum Current Into V , V , D1, D0 .........................50mA Junction Temperature......................................................+150C DD SS Maximum Current from OUT1 to CM or OUT2 ..............0.72mA Storage Temperature Range .............................-60C to +150C 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 = +15V, V = -15V, GND = 0, T = T to T , unless otherwise noted. Typical values are at T = +25C.) DD SS A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX5426A 0.004 0.025 Gain Range Accuracy (Notes 1, 2) % MAX5426B 0.025 0.090 MAX5426C 0.080 0.500 Capacitance at Analog Pins C 5pF ANALOG Gain = 1 79 Gain = 2 85 Differential CMRR (Notes 1, 2) dB Gain = 4 91 Gain = 8 97 DIGITAL INPUTS Input High Voltage V 2.4 V IH Input Low Voltage V 0.8 V IL Input Leakage Current I D1 = D0 = 0 or logic high 10 A LKG EQUIVALENT RESISTANCES Resistance Between OUT1 and R R 56 k OUT1, OUT2 OUT2 Resistance Between OUT1 and R R 26 k OUT1, INDIF- INDIF- Resistance Between INDIF- and R R 26 k INDIF-, OUT OUT Resistance Between OUT2 and R R 26 k OUT2, INDIF+ INDIF+ Resistance Between INDIF+ and R INDIF+, 26 k OFFSET R OFFSET Gain = 1 0 Gain = 2 15 Resistance Between OUT1 and R R k OUT1, FB1 FB1 Gain = 4 22 Gain = 8 26 2 MAX5426