EVALUATION KIT AVAILABLE MAX44246 36V, Low-Noise, Precision, Dual Op Amp General Description The MAX44246 is a 36V, ultra-precision, low-noise, lowdrift, dual operational amplifier that offers near-zero DC offset and drift through the use of patented chopper stabilized and auto-zeroing techniques. This method constantly measures and compensates the input offset, eliminating drift over time and temperature and the effect of 1/f noise. This dual device features rail-to-rail outputs, operates from a single 2.7V to 36V supply, and consumes only 0.42mA per channel, with only 9nV/√Hz input-referred voltage noise. The IC is unity-gain stable with a gain-bandwidth product of 5MHz. With excellent specifications such as offset voltage of 5FV (max), drift of 20nV/NC (max), and 117nVP-P noise in 0.1Hz to 10Hz, the IC is ideally suited for applications requiring ultra-low noise, and DC precision such as interfacing with pressure sensors, strain gauges, precision weight scales, and medical instrumentation. The IC is available in 8-pin FMAXM or SO packages and is rated over the -40NC to +125NC temperature range. Features S2.7V to 36V Power-Supply Range SUltra-Low Input VOS: 5µV (max) SLow 20nV/°C (max) of Offset Drift SLow 9nV/√Hz noise at 1kHz S1µs Fast Settling Time S5MHz Gain-Bandwidth Product SRail-to-Rail Output SIntegrated EMI Filter SLow 0.55mA Per Channel (max) Quiescent Current S8-Pin µMAX/SO Package Ordering Information appears at end of data sheet. For related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX44246.related. Applications Transducer Amplifiers Battery-Powered Equipment Load Cell Amplifiers µMAX is a registered trademark of Maxim Integrated Products, Inc. PLC Analog I/O Modules Precision Instrumentation Typical Operating Circuit 15V 3.3V MAX44246 R1 BUFFER R R 50RG BUFFER R VINR 1.5V MAX44246 VREF VIN+ MAX11211 15V BUFFER VDD 20V VDD RG VOUT MAX6126 15V 50RG 3V MICROPROCESSOR OUTPUT VSS C1 MAX44246 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-6375; Rev 1; 9/12 MAX44246 36V, Low-Noise, Precision, Dual Op Amp ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD to GND) ..............................-0.3V to +40V All Other Pins.................................(GND - 0.3V) to (VDD + 0.3V) Short-Circuit Duration, OUTA, OUTB to Either Supply Rail………………………….............. 1s Continuous Input Current (Any Pin) ...................................20mA Differential Input Current.................................................. Q20mA Differential Input Voltage (Note 1)........................................ .Q6V Continuous Power Dissipation (TA = +70NC) 8-Pin FMAX (derate 4.8mW/C above +70NC)..........387.8mW 8-Pin SO (derate 4.8mW/C above +70NC)...............470.6mW Operating Temperature Range......................... -40NC to +125NC Junction Temperature .....................................................+150NC Storage Temperature Range............................. -65NC to +150NC Lead Temperature (soldering,10s)..................................+300NC Soldering Temperature (reflow).......................................+260NC Note 1: The amplifier inputs are connected by internal back-to-back clamp diodes. In order to minimize noise in the input stage, current-limiting resistors are not used. If differential input voltages exceeding ±1V are applied, limit input current to 20mA. 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. PACKAGE THERMAL CHARACTERISTICS (Note 2) µMAX Junction-to-Ambient Thermal Resistance (qJA).........221NC/W Junction-to-Case Thermal Resistance (qJC) ...............42NC/W SO Junction-to-Ambient Thermal Resistance (qJA).........120NC/W Junction-to-Case Thermal Resistance (qJC) ...............37NC/W Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (VDD = 30V, VGND = 0V, VIN+ = VIN- = VDD /2, RL = 5kΩ to VDD /2, TA = -40°C to +125°C, unless otherwise noted. Typical values at TA = +25°C.) (Note 3) PARAMETER Supply Voltage Range Power-Supply Rejection Ratio (Note 4) SYMBOL VDD PSRR Quiescent Current per Amplifier IDD Power-Up Time tON CONDITIONS MIN Guaranteed by PSRR 2.7 VDD = 2.7V to 36V, TA = +25NC 148 VDD = 2.7V to 36V, -40NC < TA < +125NC 146 RL = J TYP UNITS 36 V 166 0.42 TA = +25NC MAX -40NC < TA < +125NC dB 0.55 0.60 20 mA Fs DC SPECIFICATIONS Input Common-Mode Range Common-Mode Rejection Ratio (Note 4) Input Offset Voltage (Note 4) Input Offset Voltage Drift (Note 4) Input Bias Current (Note 4) Maxim Integrated VCM CMRR Guaranteed by CMRR test VCM = (V GND + 0.05V) to (VDD - 1.5V) V GND - 0.05 146 VDD - 1.5 166 V dB VOS 1 5 FV TC VOS 1 20 nV/NC 300 600 IB TA = +25NC -40NC < TA < +125NC 1250 pA 2 MAX44246 36V, Low-Noise, Precision, Dual Op Amp ELECTRICAL CHARACTERISTICS (continued) (VDD = 30V, VGND = 0V, VIN+ = VIN- = VDD /2, RL = 5kΩ to VDD /2, TA = -40°C to +125°C, unless otherwise noted. Typical values at TA = +25°C.) (Note 3) PARAMETER Input Offset Current (Note 4) Open-Loop Gain (Note 4) SYMBOL IOS AVOL Output Short-Circuit Current Output Voltage Low CONDITIONS TYP MAX 600 1200 -40NC < TA < +125NC (V GND + 0.5V) P VOUT P (VDD – 0.5V) Noncontinuous VOL MIN TA = +25NC 2500 154 168 Sinking 40 Sourcing 30 90 TA = +25NC -40NC < TA < +125NC Output Voltage High VOH UNITS pA dB mA 115 mV 180 TA = +25NC (VDD 0.17) -40NC < TA < +125NC (VDD 0.25) (VDD 0.13) V AC SPECIFICATIONS Input Voltage-Noise Density eN Gain-Bandwidth Product 9 117 nV/√Hz nVP-P CIN 2 pF GBW 5 MHz Input Voltage Noise Input Capacitance f = 1kHz 0.1Hz < f < 10Hz Phase Margin PM CL = 20pF 60 Degrees Slew Rate SR AV = 1V/V, VOUT = 4VP-P 3.8 V/Fs Capacitive Loading CL No sustained oscillation, AV = 1V/V 300 pF Total Harmonic Distortion THD VOUT = 4VP-P, AV = +1V/V f = 1kHz -96 f = 20kHz -77 VOUT = 2VP-P, AV = +1V/V f = 1kHz -91 f = 20kHz -76 dB dB ELECTRICAL CHARACTERISTICS (VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD /2, RL = 5kΩ to VDD /2, TA = -40°C to +125°C, unless otherwise noted. Typical values at TA = +25°C.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 0.42 0.55 UNITS POWER SUPPLY Quiescent Current per Amplifier IDD Power-Up Time tON RL = J TA = +25NC -40NC < TA < +125NC 0.60 20 mA Fs DC SPECIFICATIONS Input Common-Mode Range Maxim Integrated VCM Guaranteed by CMRR test (GND 0.05) (VDD – 1.5) V 3 MAX44246 36V, Low-Noise, Precision, Dual Op Amp ELECTRICAL CHARACTERISTICS (continued) (VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD /2, RL = 5kΩ to VDD /2, TA = -40°C to +125°C, unless otherwise noted. Typical values at TA = +25°C.) (Note 3) PARAMETER Common-Mode Rejection Ratio (Note 4) Input Offset Voltage (Note 4) Input Offset Voltage Drift (Note 4) SYMBOL CMRR 142 158 -40NC < TA < +125NC, VCM = (V GND 0.05V) to (VDD - 1.5V) 140 MAX UNITS dB 5 FV TC VOS 2.4 20 nV/NC 300 600 Input Offset Current (Note 4) IOS AVOL Output Short-Circuit Current Output Voltage High TYP 1 IB Output Voltage Low CONDITIONS VOS Input Bias Current (Note 4) Open-Loop Gain (Note 4) MIN TA = +25NC, VCM = (V GND - 0.05V) to (VDD - 1.5V) TA = +25NC -40NC < TA < +125NC VOH 600 TA = +25NC -40NC < TA < +125NC 1200 2200 (V GND + 0.5V) ≤ VOUT ≤ (VDD - 0.5V) Noncontinuous VOL 1100 144 164 Sinking 40 Sourcing 30 30 TA = +25NC -40NC < TA < +125NC (VDD 0.06) -40NC < TA < +125NC (VDD 0.09) (VDD 0.05) pA dB mA 40 60 TA = +25NC pA mV V AC SPECIFICATIONS Input Voltage-Noise Density eN Gain-Bandwidth Product 9 117 nV/√Hz nVP-P CIN 2 pF GBW 5 MHz Input Voltage Noise Input Capacitance f = 1kHz 0.1Hz < f < 10Hz Phase Margin PM CL = 20pF 60 Degrees Slew Rate SR 3.8 V/µs Capacitive Loading CL AV = +1V/V, VOUT = 2VP-P, 10% to 90% No sustained oscillation, AV = 1V/V 300 pF Total Harmonic Distortion Settling Time THD VOUT = 2VP-P, AV = 1V/V f = 1kHz -92 f = 20kHz -76 To 0.01%, VOUT = 2V step, AV = 1V/V 1 dB µs Note 3: All devices are 100% production tested at TA = +25°C. Temperature limits are guaranteed by design. Note 4: Guaranteed by design. Maxim Integrated 4 MAX44246 36V, Low-Noise, Precision, Dual Op Amp Typical Operating Characteristics (VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD/2, RL = 5kΩ to VDD/2, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) INPUT OFFSET VOLTAGE DRIFT HISTOGRAM 20 15 10 5 -1.0 -1.5 MAX44246 toc02 400 30 25 20 15 -0.5 0 0.5 1.0 300 250 200 150 10 100 5 50 0 0 0.002 0.003 0.005 5 10 15 20 25 30 OFFSET VOLTAGE DRIFT (µV/°C) SUPPLY VOLTAGE (V) SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE INPUT OFFSET VOLTAGE vs. INPUT COMMON-MODE VOLTAGE INPUT OFFSET VOLTAGE vs. TEMPERATURE 430 420 410 1 0 -1 40 100 125 MAX44246 toc06 2 35 5 INPUT OFFSET VOLTAGE (µV) 440 MAX44246 toc05 450 3 INPUT OFFSET VOLTAGE (µV) VIN = VDD/2 NO LOAD 460 -0.006 -0.004 -0.002 1.5 VIN = VDD/2 NO LOAD 350 OFFSET VOLTAGE (µV) MAX44246 toc04 470 0 -2 400 0 25 50 75 100 -3 125 -5 0 1 2 3 4 5 6 7 8 9 -25 0 25 50 75 VCM (V) TEMPERATURE (°C) INPUT BIAS CURRENT vs. VCM vs. TEMPERATURE INPUT BIAS CURRENT vs. TEMPERATURE COMMON-MODE REJECTION RATIO vs. TEMPERATURE IB- (TA = +25°C) IB- (TA = +125°C) IB- (TA = -40°C) IB+ (TA = +25°C) IB+ (TA = -40°C) 1000 800 600 1 2 3 4 VCM (V) Maxim Integrated 5 6 7 8 9 170 160 400 150 IB+ 200 0 IB- -200 140 130 120 -400 110 -600 100 -800 90 -1000 0 180 MAX44246 toc09 INPUT BIAS CURRENT (pA) IB+ (TA = +125°C) -1 -50 TEMPERATURE (°C) INPUT BIAS CURRENT (pA) 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400 -600 -800 -1000 -25 MAX44246 toc07 -50 CMRR (dB) SUPPLY CURRENT (µA) 35 450 0 0 390 500 SUPPLY CURRENT (µA) 25 40 MAX44246 toc08 PERCENT OCCURENCE (%) 30 45 PERCENT OCCURRENCE (%) MAX44246 toc01 35 SUPPLY CURRENT PER AMPLIFIER vs. SUPPLY VOLTAGE MAX44246 toc03 INPUT OFFSET VOLTAGE HISTOGRAM 80 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) 5 MAX44246 36V, Low-Noise, Precision, Dual Op Amp Typical Operating Characteristics (continued) (VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD/2, RL = 5kΩ to VDD/2, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) POWER-SUPPLY REJECTION RATIO vs. TEMPERATURE 170 80 140 40 120 110 0 100 -20 90 1 10 100 1k 10k 100k 1M 10M -25 25 50 75 100 OUTPUT VOLTAGE LOW vs. OUTPUT SINK CURRENT OUTPUT VOLTAGE HIGH vs. OUTPUT SINK CURRENT 300 250 200 150 100 10.05 10.00 70 9.95 60 9.90 50 9.85 VOL (mV) 350 9.80 9.75 10 0 9.50 2 4 6 8 10 0 2 OUTPUT SINK CURRENT (mA) 4 6 8 10 OUTPUT VOLTAGE HIGH vs. TEMPERATURE 2 MAX44246 toc16 9.965 9.960 0 -2 NORMALIZED GAIN, VIN = 100mVP-P 9.955 9.950 9.945 9.935 9.930 25 50 75 TEMPERATURE (°C) Maxim Integrated 100 125 25 50 75 100 125 LARGE-SIGNAL GAIN vs. FREQUENCY 0 -5 NORMALIZED GAIN, VIN = 2VP-P -10 -6 -8 -10 -12 -15 -20 -25 -30 -35 -14 9.940 0 0 5 MAGNITUDE (dB) MAGNITUDE (dB) -4 -25 -25 TEMPERATURE (°C) SMALL-SIGNAL GAIN vs. FREQUENCY 9.970 -50 -50 OUTPUT SINK CURRENT (mA) MAX44246 toc17 0 30 20 9.65 9.55 0 40 9.70 9.60 50 10 100 1k 10k 100k 1M 10M100M OUTPUT VOLTAGE LOW vs. TEMPERATURE MAX44246 toc14 MAX44246 toc13 400 0.01 0.1 1 125 FREQUENCY (Hz) TEMPERATURE (°C) 450 OUTPUT VOLTAGE HIGH (V) 0 FREQUENCY (Hz) 500 50 -50 -50 OUTPUT VOLTAGE HIGH (mV) 0.1 100 0 80 -40 OUTPUT VOLTAGE HIGH (mV) 130 20 150 MAX44246 toc18 60 VIN = 100mVP-P MAX44246 toc15 150 MAGNITUDE (dB) 160 100 PSRR (dB) MAGNITUDE (dB) 120 OPEN-LOOP GAIN vs. FREQUENCY 200 MAX44246 toc11 100mVP-P 140 180 MAX44246 toc10 160 MAX44246 toc12 COMMON-MODE REJECTION RATIO vs. FREQUENCY -16 -40 -18 -45 -50 -20 10 100 1k 10k 100k FREQUENCY (Hz) 1M 10M 100M 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) 6 MAX44246 36V, Low-Noise, Precision, Dual Op Amp Typical Operating Characteristics (continued) (VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD/2, RL = 5kΩ to VDD/2, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) INPUT VOLTAGE NOISE vs. FREQUENCY MAX44246 toc19 INPUT VOLTAGE NOISE (nV/√Hz) INPUT VOLTAGE 0.1Hz TO 10Hz NOISE MAX44246 toc20 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 200nV/div 1 10 100 1k 100k 10k 1s/div FREQUENCY (Hz) LARGE-SIGNAL (2VP-P) STEP RESPONSE vs. TIME SMALL-SIGNAL (100mVP-P) STEP RESPONSE vs. TIME MAX44246 toc22 MAX44246 toc21 VIN 50mV/div VIN 1V/div VOUT 50mV/div VOUT 1V/div 1µs/div 1µs/div STABILITY vs. CAPACITIVE AND RESISTIVE LOAD IN PARALLEL STABILITY vs. CAPACITIVE LOAD AND SERIES ISOLATION RESISTANCE 10 RISO (I) 10 RESISTIVE LOAD (kI) STABLE UNSTABLE 1 POWER-UP TIME MAX44246 toc24 100 MAX44246 toc23 100 MAX44246 toc25 VDD = VSS = 0V VDD = 10V 5V/div 1 UNSTABLE 0.1 STABLE VIN = VOUT = 0V 0.01 200mV/div 0.001 0.1 100 1k 10k CAPACITIVE LOAD (pF) Maxim Integrated 100k 100 1k 10k CAPACITIVE LOAD (pF) 100k 20µs 7 MAX44246 36V Low-Noise, Precision, Dual Op Amp Typical Operating Characteristics (continued) (VDD = 10V, VGND = 0V, VIN+ = VIN- = VDD/2, RL = 5kΩ to VDD/2, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) TOTAL HARMONIC DISTORTION vs. OUTPUT AMPLITUDE TOTAL HARMONIC DISTORTION vs. FREQUENCY MAX44246 toc27 -20 -30 -20 -40 -40 -50 THD (dB) -60 -70 -80 -90 -100 -110 -60 -80 2VP-P OUTPUT -100 4VP-P OUTPUT -120 -120 100 10 1k 10k 0 100k FREQUENCY (Hz) -60 -80 -100 VDD = 30V -140 -160 10 100 1k 10k 100k FREQUENCY (Hz) 1M 9 10 -40 -50 -60 -70 -80 -90 -100 -110 -120 1 3 4 5 6 7 8 OUTPUT AMPLITUDE (V) -20 -30 THD (dB) CROSSTALK (dB) -40 Maxim Integrated 0 -10 MAX44246 toc28 -20 2 TOTAL HARMONIC DISTORTION vs. FREQUENCY CROSSTALK vs. FREQUENCY 0 1 10M MAX44246 toc29 THD (dB) 0 MAX44246 toc26 0 -10 2VP-P INPUT 4VP-P INPUT -120 10 100 1k 10k 100k FREQUENCY (Hz) 8 MAX44246 36V, Low-Noise, Precision, Dual Op Amp Pin Configuration TOP VIEW + OUTA 1 8 VDD INA- 2 7 OUTB 3 6 INB- GND 4 5 INB+ INA+ MAX44246 µMAX/SO Pin Description PIN NAME 1 OUTA FUNCTION 2 INA- Channel-A Negative Input 3 INA+ Channel-A Positive Input 4 GND Ground 5 INB+ Channel-B Positive Input 6 INB- Channel-B Negative Input 7 OUTB 8 VDD Channel-A Output Channel-B Output Supply Voltage Detailed Description The 1/f noise appears as a slow varying offset voltage and is eliminated by the chopping technique used. The MAX44246 is a high-precision amplifier that provides below 5µV of maximum input-referred offset and low flicker noise. These characteristics are achieved by using a combination of proprietary auto-zeroing and chopper stabilized techniques. This combination of auto-zeroing and chopping ensures that these amplifiers give all the benefits of zero-drift amplifiers, while still ensuring low noise, minimizing chopper spikes, and providing wide bandwidth. Offset voltages due to power ripple/spikes as well as common-mode variation, are corrected resulting in excellent PSRR and CMRR specifications. Electromagnetic interference (EMI) noise occurs at higher frequency, resulting in malfunction or degradation of electrical equipment. The ICs have an input EMI filter to avoid the output being affected by radio frequency interference. The EMI filter composed of passive devices, presents significant higher impedance to higher frequency. Noise Suppression Flicker noise, inherent in all active devices, is inversely proportional to frequency present. Charges at the oxide-silicon interface that are trapped-and-released by MOSFET oxide occurs at low frequency more often. For this reason, flicker noise is also called 1/f noise. The MAX44246 eliminates the 1/f noise internally, thus making it an ideal choice for DC or sub-Hz precision applications. Maxim Integrated Applications Information ADC Buffer Amplifier The MAX44246 has low input offset voltage, low noise, and fast settling time that make this amplifier ideal for ADC buffers. Weight scales are one application that often requires a low-noise, high-voltage amplifier in front of an ADC. The Typical Operating Circuit details an example of a load cell and amplifier driven from the same ±10V supplies, along with the MAX11211 18-bit delta sigma ADC. Load cells produce a very small voltage change at their outputs; therefore driving the excitation source with a higher voltage produces a wider dynamic range that can be measured at the ADC inputs. 9 MAX44246 36V, Low-Noise, Precision, Dual Op Amp The MAX11211 ADC operates from a single 2.7V to 3.6V analog supply, offers 18-bit noise-free resolution and 0.86mW power dissipation. The MAX11211 also offers > 100dB rejection at 50Hz and 60Hz. This ADC is part of a family of 16-, 18-, 20-, and 24-bit delta sigma ADCs with high precision and < 1mW power dissipation. The low input offset voltage and low noise of MAX44246 allows a gain circuit to precede the MAX11211 without losing any dynamic range at the ADC. See the Typical Operating Circuit. Precision Low-Side Current Sensing The ICs’ ultra-low offset voltage and drift make them ideal for precision current-sensing applications. Figure 1 shows the ICs in a low-side current-sense configuration. This circuit produces an accurate output voltage, VOUT equal to ILOAD x RSENSE x (1 + R2 /R1). Layout Guidelines The MAX44246 features ultra-low offset voltage and noise. Therefore, to get optimum performance follow the following layout guidelines. Avoid temperature gradients at the junction of two dissimilar metals. The most common dissimilar metals used on a PCB are solder-to-component lead and solder-toboard trace. Dissimilar metals create a local thermocouple. A variation in temperature across the board can cause an additional offset due to Seebeck effect at the solder junctions. To minimize the Seebeck effect, place Maxim Integrated VSUPPLY ILOAD MAX44246 OUT RSENSE R2 R1 Figure 1. Low-Side Current Sensing the amplifier away from potential heat sources on the board, if possible. Orient the resistors such that both the ends are heated equally. It is a good practice to match the input signal path to ensure that the type and number of thermoelectric junctions remain the same. For example, consider using dummy 0Ω resistors oriented in such a way that the thermoelectric sources, due to the real resistors in the signal path, are cancelled. It is recommended to flood the PCB with ground plane. The ground plane ensures that heat is distributed uniformly reducing the potential offset voltage degradation due to Seebeck effect. 10 MAX44246 36V, Low-Noise, Precision, Dual Op Amp Package Information Ordering Information PART TEMP RANGE PIN-PACKAGE MAX44246ASA+ -40NC to +125NC 8 SO MAX44246AUA+ -40NC to +125NC 8 FMAX +Denotes a lead(Pb)-free/RoHS-compliant package. Chip Information PROCESS: BiCMOS Maxim Integrated For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 µMAX U8+3 21-0036 90-0092 8 SO S8+4 21-0041 90-0096 11 MAX44246 36V, Low-Noise, Precision, Dual Op Amp Revision History REVISION NUMBER REVISION DATE 0 7/12 Initial release 1 9/12 Revised the Electrical Characteristics and the Typical Operating Characteristics. DESCRIPTION PAGES CHANGED — 1, 2, 3, 5 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2012 Maxim Integrated 12 The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.