MAX4236/MAX4237 19-2110 Rev 0 8/01 SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps General Description Features The MAX4236/MAX4237 are high-precision op amps Ultra-Low Offset Voltage that feature an exceptionally low offset voltage and off- 20V (max) at +25C (Grade A) set voltage temperature coefficient without using any 50V (max) at +25C (Grade B, 6-Pin SOT23) chopper techniques. The MAX4236 and MAX4237 have Ultra-Low Offset Voltage Drift a typical large-signal, open-loop voltage gain of 120dB. These devices have an ultra-low input-bias current of 2V/C (max) (Grade A) 1pA. The MAX4236 is unity-gain stable with a gain- 4.5V/C (max) (Grade B, 6-Pin SOT23) bandwidth product of 1.7MHz, while the MAX4237 is 5.5V/C (max) (6-Pin SOT23) stable for closed-loop gains greater than 5V/V with a Ultra-Low 1pA Input Bias Current gain-bandwidth product of 7.5MHz. Both devices have a shutdown function in which the quiescent current is High Open-Loop Voltage Gain: 110dB (min) reduced to less than 0.1A, and the amplifier output is (R = 100k ) L forced into a high-impedance state. Compatible with +3V and +5V Single-Supply The input common-mode range of the MAX4236/ Power Systems MAX4237 extends below the negative supply range, and the output swings Rail-to-Rail . These features make the Ground Sensing: Input Common-Mode Range amplifiers ideal for applications with +3V or +5V single Includes Negative Rail power supplies. The MAX4236/MAX4237 are specified for Rail-to-Rail Output Swing into a 1k Load the extended temperature range (-40C to +85C) and are available in tiny SOT23, MAX, and SO packages. For 350A Quiescent Current greater accuracy, the A grade MAX and SO packages Gain-Bandwidth Product are tested to guarantee 20V (max) offset voltage at 1.7MHz (MAX4236, A = 1V/V) V +25C and less then 2V/C drift. 7.5MHz (MAX4237, A = 5V/V) V Applications 200pF Capacitive Load Handling Capability Strain Gauges Shutdown Mode: 0.1A Quiescent Current, Piezoelectric Sensors Places Output in a High-Impedance State Thermocouple Amplifiers Available in Space-Saving SOT23 and MAX Electrochemical Sensors Packages Battery-Powered Instrumentation Instrumentation Amplifiers Ordering Information Rail-to-Rail is a registered trademark of Nippon Motorola, Inc. PART TEMP. RANGE PIN-PACKAGE Pin Configurations MAX4236EUT-T -40C to +85C 6 SOT23-6 MAX4236AEUA -40C to +85C 8 MAX TOP VIEW MAX4236BEUA -40C to +85C 8 MAX MAX4236AESA -40C to +85C 8 SO N.C. 1 8 SHDN OUT16 V CC MAX4236BESA -40C to +85C 8 SO IN- 2 7 V CC MAX4236A/B IN+ 3 6 OUT MAX4237EUT-T -40C to +85C 6 SOT23-6 MAX4237A/B V 2 MAX4236 5 SHDN EE V 4 5 N.C. EE MAX4237AEUA -40C to +85C 8 MAX MAX4237 MAX4237BEUA -40C to +85C 8 MAX SO-8/ MAX IN+34 IN- MAX4237AESA -40C to +85C 8 SO MAX4237BESA -40C to +85C 8 SO SOT23-6 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.SOT23, Very High Precision, 3V/5V Rail-To-Rail Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (V - V )......................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C CC EE Analog Input Voltage (IN+ or IN-)....(V - 0.3V) to (V + 0.3V) Junction Temperature......................................................+150C EE CC Logic Input Voltage (SHDN) ............(V - 0.3V) to (V + 0.3V) Storage Temperature Range .............................-65C to +150C EE CC Current into Any Pin ............................................................20mA Lead Temperature (soldering, 10s) .................................+300C Output Short-Circuit Duration....Continuous to Either V or V CC EE Continuous Power Dissipation (T = +70C) A 6-Pin SOT23-6 (derate 8.7mW/C above +70C) .........696mW 8-Pin MAX (derate 4.5mW/C above +70C) ..............362mW 8-Pin SO (derate 5.9mW/C above +70C)...................471mW 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 (SO-8 and MAX-8) (V = +2.4V to +5.5V, V = 0, V = 0, V = V /2, R = 100k to V /2, T = T to T , unless otherwise noted. Typical CC EE CM OUT CC L CC A MIN MAX values are at V = +5V and T = +25C.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V Guaranteed by the PSRR test 2.4 5.5 V CC In normal mode 350 440 V = +5V CC In shutdown mode 0.1 2 Quiescent Supply Current I A CC In normal mode 350 440 V = +3V CC In shutdown mode 0.1 2 o T = +25 C 5 20 V = +5V, A CC Grade A T = T to T 150 A MIN MAX Input Offset Voltage V V OS o T = +25 C 5 50 V = +5V, A CC Grade B T = T to T 340 A MIN MAX Grade A 0.6 2 Inp ut Offset Vol tag e Tem p er ature V = +5V CC TCV V/C OS C oeffici en t (Note 3) Grade B 0.6 4.5 Input Bias Current I (Note 2) 1 500 pA B Input Offset Current I (Note 2) 1 pA OS Input Resistance R Differential or common mode 1000 M IN Input Common-Mode Voltage V Guaranteed by the CMRR test -0.15 V - 1.2 V CM C C o V = +5V CC T = +25 C 84 102 A -0.15V V CM T = T to T 80 (V - 1.2V) CC A MIN MAX Common-Mode Rejection Ratio CMRR dB o V = +3.0V CC T = +25 C 82 102 A -0.15V V CM T = T to T 78 (V - 1.2V) A MIN MAX CC o T = +25 C 97 120 A V = +2.4V to CC Power-Supply Rejection Ratio PSRR dB +5.5V T = T to T 95 A MIN MAX 2 MAX4236/MAX4237