19-5873; Rev 4; 7/12 EVALUATION KIT AVAILABLE MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps General Description The MAX44260/MAX44261 offer a unique combination of high speed, precision, low noise, and low-voltage operation making them ideally suited for a large number of signal processing functions such as filtering and amplification of signals in portable and industrial equipment. The amplifiers feature an input offset of less than 50FV and a high-gain bandwidth product of 15MHz while maintaining a low 1.8V supply rail. The devices’ rail-torail input/outputs and low noise guarantee maximum dynamic range in demanding applications such as 12- to 14-bit SAR ADC drivers. Unlike traditional rail-to-rail input structures, input crossover distortion is absent due to an optimized input stage with an ultra-quiet charge pump. The MAX44260 includes a fast-power-on shutdown mode for further power savings. The MAX44261 offers a unique on-demand calibration pin where the user can invoke self-trimming of the input offset voltage. Features S Low 1.8V Supply Rail Over the -40°C to +125°C Range 1.7V Supply Rail Over the 0°C to +70°C Range S 15MHz Unity-Gain Bandwidth S Low 12.7nV/√Hz Input Voltage-Noise Density S Low 1.2fA/√Hz Input Current-Noise Density S S S S S S Low 50µV (max) VOS at +25°C On-Demand VOS Self-Calibration (MAX44261) 500fA Low Input Bias Current 750µA Quiescent Current per Amplifier < 1µA Supply Current in Shutdown Small, 2mm x 2mm SC70 and 1mm x 1.5mm Thin µDFN (MAX44260) Packages S Low 110dB Total Harmonic Distortion Applications The family of parts operates from a supply range of 1.8V to 5.5V over the -40NC to +125NC temperature range and can operate down to 1.7V over the 0NC to +70NC temperature range. The MAX44260/MAX44261 are available in small, 6-pin SC70 packages. The MAX44260 is also available in a 1mm x 1.5mm thin µDFN (ultra-thin LGA) package. Notebooks 3G/4G Handsets Portable Media Players Portable Medical Instruments Battery-Operated Devices Analog-to-Digital Converter Buffers Ordering Information appears at end of data sheet. Transimpedance Amplifiers General-Purpose Signal Processing Typical Application Circuit 15nF +3.3V 2.4kI 22kI 330pF MAX44260 10kI 3.3nF CORNER FREQUENCY = 10kHz ADC MAX11645 SALLEN-KEY FILTER For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX44260.related For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps ABSOLUTE MAXIMUM RATINGS IN+, IN-, OUT..................................(VSS - 0.3V) to (VDD + 0.3V) VDD to VSS................................................................-0.3V to +6V SHDN, CAL..............................................................-0.3V to +6V Output to Short-Circuit Ground Duration............................... 10s Continuous Input Current into Any Pin............................. Q20mA Continuous Power Dissipation (TA = +70NC) SC70 (derate 3.1mW/NC above +70NC).......................245mW 6-Pin Thin µDFN (Ultra-Thin LGA) (derate 2.1mW/NC above +70NC)..............................110.2mW Operating Temperature Range......................... -40NC to +125NC Junction Temperature......................................................+150NC Lead Temperature (soldering, 10s).................................+300NC Soldering Temperature (reflow).......................................+260NC 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 1) SC70 Junction-to-Ambient Thermal Resistance (BJA)..... 326.5NC/W Junction-to-Case Thermal Resistance (BJC)..............115NC/W Thin µDFN (Ultra-Thin LGA) Junction-to-Ambient Thermal Resistance (BJA)........ 470NC/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VDD + 0.1 V DC CHARACTERISTICS Input Voltage Range VIN+ VIN- Input Offset Voltage VOS Guaranteed by CMRR test -0.1 TA = +25NC Input Offset Voltage Drift 10 100 TA = -40°C to +125°C 500 VOS - TC TA = +25NC Input Bias Current (Note 3) Input Capacitance Common-Mode Rejection Ratio Open-Loop Gain Output Short-Circuit Current IB AOL ISC 0.8 5 0.01 0.5 TA = -40NC to +85NC 10 TA = -40NC to +125NC 100 CIN CMRR 50 TA = -40°C to +125°C after calibration FV FV/NC pA 0.4 pF dB VCM = -0.1V to (VDD + 0.1V) 75 90 0.4V P VOUT P VDD - 0.4V, ROUT = 10kI 100 115 0.4V P VOUT P VDD - 0.4V, ROUT = 600I 91 100 0.4V P VOUT P VDD - 0.4V, ROUT = 32I 80 To VDD or VSS 50 dB mA 2 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 2) PARAMETER SYMBOL VOL VSS Output Voltage Swing VDD VOH CONDITIONS MIN TYP MAX ROUT = 10kI 20 ROUT = 600I 50 ROUT = 32I 400 700 ROUT = 10kI 10 ROUT = 600I 40 ROUT = 32I 400 UNITS mV 800 AC CHARACTERISTICS Input Voltage-Noise Density en f = 10kHz 12.7 nV/√Hz Input Current-Noise Density in f = 10kHz 1.2 fA/√Hz 15 MHz 7 V/Fs 1.7 µs Gain-Bandwidth Product Slew Rate GBWP SR VOUT = 2VP-P, VDD = 3.3V, AV = 1V/V, CL = 30pF (load), settle to 0.01% Settling Time Capacitive Loading Total Harmonic Distortion CLOAD THD No sustained oscillation 300 pF f = 10kHz, VO = 2VP-P, AV = 1, ROUT = 10kI -110 dB 1 µs DVOUT = 0.2V, VDD = 3.3V, AV = 1V/V; RS = 20Ω, CL = 1nF (load) Output Transient Recovery Time POWER-SUPPLY CHARACTERISTICS Power-Supply Range Power-Supply Rejection Ratio Quiescent Current Shutdown Supply Current VDD PSRR 1.8 5.5 TA = 0NC to +70NC 1.7 5.5 VCM = VDD/2 82 IDD ISHDN Shutdown Input Low VIL Shutdown Input High VIH Output Leakage Current in Shutdown ISHDN Shutdown Input Bias Current IIL/IIH Shutdown Turn-On Time tSHDN Turn-On Time Guaranteed by PSRR tON 95 750 MAX44260/MAX44261 only dB 1200 µA 1 µA 0.5 V 1.3 V 100 pA MAX44260 1 MAX44261 0.1 TA = +25NC (Note 3) 14.4 TA = -40°C to +125°C (Note 3) TA = +25NC (Note 3) V 18.9 26.7 9.7 TA = -40°C to +125°C (Note 3) 15.2 18.4 µA µs ms Note 2: All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design. Note 3: Guaranteed by design. 3 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE 20 TA = -40°C 0 -20 TA = +25°C 0 0.5 1.0 1.5 2.0 2.5 20 TA = +25°C 0 -20 -40 TA = +125°C -60 MAX44260 toc03 15 10 5 -100 3.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 5.5 -15 -10 -5 0 5 10 15 20 SUPPLY VOLTAGE (V) INPUT OFFSET VOLTAGE (µV) INPUT OFFSET DRIFT HISTOGRAM INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE OUTPUT-VOLTAGE LOW vs. OUTPUT SINK CURRENT (VOL - VEE, VCC = 1.8V) 12 10 8 6 4 80 60 40 TA = +25°C 20 0 -20 TA = -40°C -40 -60 2 -80 0 -100 -1.5 -1 -0.5 0 0.50 1.00 -1.8 -1.3 -0.8 -0.3 0.25 0.75 1.25 INPUT OFFSET DRIFT (µV/°C) TA = +85°C TA = +125°C 200 25 MAX44260 toc06 14 100 180 OUTPUT-VOLTAGE LOW (mV) MAX44260 toc04 16 -2 20 COMMON-MODE VOLTAGE (V) 18 PERCENT OCCURRENCE (%) 3.0 INPUT BIAS CURRENT (pA) -0.5 40 25 -80 TA = +125°C -60 TA = -40°C 60 MAX44260 toc05 -40 80 MAX44260 toc02 40 INPUT VOS HISTOGRAM 100 INPUT OFFSET VOLTAGE (µV) MAX44260 toc01 INPUT OFFSET VOLTAGE (µV) 60 PERCENT OCCURRENCE (%) INPUT OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE 160 140 120 TA = +25°C 100 80 TA = +125°C 60 TA = -40°C 40 20 0 -0.5 0 0.5 1.0 1.5 2.0 2.5 COMMON-MODE VOLTAGE (V) 3.0 3.5 0.1 1 10 OUTPUT SINK CURRENT (mA) 100 4 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) OUTPUT-VOLTAGE LOW vs. OUTPUT SINK CURRENT (VOL - VEE, VCC = 5V) TA = +25°C 120 100 80 TA = +125°C 60 40 20 1 10 OUTPUT SINK CURRENT (mA) 140 TA = +25°C 120 100 80 TA = +125°C 60 40 20 TA = -40°C 0 0.1 140 TA = +25°C 120 100 80 TA = +125°C 60 TA = -40°C 40 20 1 10 OUTPUT SINK CURRENT (mA) 1 10 OUTPUT SOURCE CURRENT (mA) 80 100 TA = +125°C 60 TA = -40°C 40 0.1 180 160 140 SUPPLY CURRENT vs. SUPPLY VOLTAGE TA = +25°C 120 100 80 TA = +125°C 60 TA = -40°C 40 0.1 1 10 OUTPUT SOURCE CURRENT (mA) 100 1 10 OUTPUT SOURCE CURRENT (mA) 900 MAX44260 toc11 200 850 TA = +25°C 800 TA = +125°C 750 700 TA = -40°C 650 0 0.1 100 100 20 0 TA = +25°C 120 0 0.1 OUTPUT-VOLTAGE HIGH (mV) 160 140 OUTPUT-VOLTAGE HIGH vs. OUTPUT SOURCE CURRENT (VCC - VOH, VCC = 5V) MAX44260 toc10 OUTPUT-VOLTAGE HIGH (mV) 180 160 20 TA = -40°C OUTPUT-VOLTAGE HIGH vs. OUTPUT SOURCE CURRENT (VCC - VOH, VCC = 3.3V) 200 180 0 100 MAX44260 toc09 160 200 MAX44260 toc12 140 180 SUPPLY CURRENT (µA) 160 200 MAX44260 toc08 OUTPUT-VOLTAGE LOW (mV) 180 OUTPUT-VOLTAGE LOW (mV) MAX44260 toc07 200 OUTPUT-VOLTAGE HIGH vs. OUTPUT SOURCE CURRENT (VCC - VOH, VCC = 1.8V) OUTPUT-VOLTAGE HIGH (mV) OUTPUT-VOLTAGE LOW vs. OUTPUT SINK CURRENT (VOL - VEE, VCC = 3.3V) 100 600 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) 5 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE (VSHDN = VEE) 0.6 0.5 TA = -40°C 0.4 TA = +25°C 0.3 0.2 MAX44260 toc15 100 -20 -40 80 CMRR (dB) 0.7 0 MAX44260 toc14 TA = +125°C OPEN-LOOP GAIN (dB) 0.9 0.8 120 MAX44260 toc13 SHUTDOWN SUPPLY CURRENT (µA) 1.0 COMMON-MODE REJECTION RATIO vs. FREQUENCY OPEN-LOOP GAIN vs. FREQUENCY 60 -60 40 -80 20 -100 0.1 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1 10 100 1k 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY DC CMRR AND PSRR vs. TEMPERATURE INPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY -40 -60 -80 -94 -96 -98 -100 DC PSRR -100 -120 100 1k 10k 100k FREQUENCY (Hz) 1M 10M 100M MAX44260 toc18 DC CMRR 500 INPUT VOLTAGE-NOISE DENSITY (nV/√Hz) REJECTION RATIO (dB) -92 MAX44260 toc17 -90 MAX44260 toc16 -20 10 10 10k 100k 1M 10M 100M SUPPLY VOLTAGE (V) 0 PSRR (dB) -120 0 1.5 450 400 350 300 250 200 150 100 50 0 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 6 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) TOTAL HARMONIC DISTORTION vs. INPUT AMPLITUDE (f = 10kHz, VCC = 5.5V, AV = 1V/V) INPUT CURRENT-NOISE DENSITY vs. FREQUENCY MAX44260 toc19 4.5 4.0 110 3.5 3.0 2.5 2.0 105 100 95 1.5 90 1.0 85 0.5 0 4s/div 115 THD (dB) 0.5µV/div 120 MAX44260 toc20 INPUT-CURRENT NOISE DENSITY (fA/√Hz) 5.0 10 100 1000 10k 100k 80 0 FREQUENCY (Hz) TOTAL HARMONIC DISTORTION vs. FREQUENCY (VIN = 2VP-P) -85 THD (dB) -90 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT AMPLITUDE (V) SMALL-SIGNAL TRANSIENT RESPONSE LARGE-SIGNAL TRANSIENT RESPONSE MAX44260 toc23 MAX44260 toc22 -80 MAX44260 toc21 0.1Hz TO 10Hz OUTPUT-VOLTAGE NOISE INPUT 50mV/div VCC/2 MAX44260 toc24 INPUT 1V/div VCC/2 -95 -100 VCC = 5.5V OUTPUT 500mV/div VCC/2 -105 OUTPUT 50mV/div VCC/2 -110 VCC = 3.3V -115 -120 1 10 100 1k 10k 100k 200ns/div 100ns/div FREQUENCY (Hz) 7 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Typical Operating Characteristics (continued) (VDD = 3.3V, VSS = 0V, VIN+ = VIN- = VDD/2, RL = 10kI to VDD/2, VCAL = VSHDN = VDD, TA = -40NC to +125NC. Typical values are at TA = +25NC, unless otherwise noted. All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.) STABILITY vs. CAPACITIVE LOAD AND ISOLATION RESISTANCE OVERSHOOT (%) 14 12 10 8 6 4 2 0 100 1k 10k 100k 100k STABLE MAX44260 toc27 16 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 10k RESISTIVE LOAD (I) 18 STABILITY vs. CAPACITIVE AND RESISTIVE LOAD MAX44260 toc26 MAX44260 toc25 20 ISOLATION RESISTANCE (I) PERCENT OVERSHOOT vs. LOAD RESISTANCE (VIN = 100mVP-P) UNSTABLE 1k 100 STABLE 10 UNSTABLE 1 0 LOAD RESISTANCE (I) 500 1000 1500 2000 2500 3000 3500 4000 100 1k POWER-UP TIME 100k TURN-ON TIME FROM SHUTDOWN MAX44260 toc28 MAX44260 toc29 VCC 2V/div SHDN 2V/div GND VSS OUTPUT 500mV/div 10k CAPACITIVE LOAD (pF) CAPACITIVE LOAD (pF) OUTPUT 500mV/div VSS GND 4ms/div 10µs/div 8 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Pin Configurations TOP VIEW VDD SHDN OUT 6 5 4 NOT TO SCALE + IN+ 1 VSS IN- + MAX44260 6 VDD IN+ 1 2 5 SHDN VSS 3 4 OUT IN- MAX44261 6 VDD 2 5 CAL 3 4 OUT SC70 SC70 MAX44260 + 1 2 3 IN+ VSS IN- Thin µDFN (Ultra-Thin LGA) Pin Description PIN NAME FUNCTION MAX44260 MAX44261 1 1 IN+ Positive Input 2 2 VSS Negative Power Supply. Bypass with a 0.1FF capacitor to ground. 3 3 IN- Negative Input 4 4 OUT Output — 5 CAL Active-Low Calibrate Input 5 — 6 6 SHDN VDD Active-Low Shutdown Positive Power Supply. Bypass with a 0.1FF capacitor to ground. 9 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Detailed Description Crossover Distortion These op amps feature a low-noise integrated charge pump that creates an internal voltage rail 1V above VDD, which is used to power the input differential pair of PMOS transistors as shown in Figure 1. Such a unique architecture eliminates crossover distortion common in traditional CMOS input architecture (Figure 2), especially when used in a noninverting configuration, such as for Sallen-Key filters. The MAX44260/MAX44261 are high-speed low-power op amps ideal for signal processing applications due to the device’s high precision and low-noise CMOS inputs. The devices self-calibrate on power-up to eliminate effects of temperature and power-supply variation. The MAX44260 also features a low-power shutdown mode that greatly reduces quiescent current while the device is not operational and recovers in 30µs. The charge pump’s operating frequency lies well above the unity-gain frequency of the amplifier. Thanks to its highfrequency operation and ultra-quiet circuitry, the charge pump generates little noise, does not require external components, and is entirely transparent to the user. The MAX44261 features a user-selectable self-calibration input that shuts down the device and allows it to be recalibrated at any time. The calibration routine takes 10ms. INTERNAL CHARGE PUMP MAX44260 INPUTS STRUCTURE STANDARD INPUT STRUCTURE Figure 1. Comparing the Input Structure of the MAX44260 to Standard Op-Amp Inputs AMPLIFIER OUTPUT CROSSOVER DISTORTION MAX44261 TIME Figure 2. Crossover Distortion of Typical Amplifiers 10 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Applications Information and retains its power-up trim settings. Figure 3 shows that the device also recovers from shutdown in under 30Fs. Power-Up Autotrim The MAX44261 features a recalibrate input that acts the same as the shutdown mode of the MAX44260. However, when the input is pulled low, the device goes through a self-calibration sequence again (Figure 3). The ICs feature an automatic trim that self-calibrates the VOS of these devices to less than 50FV of input offset voltage on power-up. This self-calibration feature allows the device to eliminate input offset voltage effects due to power supply and operating temperature variation simply by cycling its power. The autotrim sequence takes approximately 10ms to complete and is triggered by an internal power-on-reset (POR) circuitry. During this time, the inputs and outputs are put into high impedance and left unconnected. The MAX44261 can also be forced into a self-calibration cycle by pulling the CAL input low for 1µs. This input also puts the part into shutdown mode. The shutdown logic levels of the devices are independent of supply, allowing the shutdown feature of the device to operate off of a 1.8V or 3.3V microcontroller, regardless of supply voltage. Rail-to-Rail Input/Output The input voltage range of the ICs extends 100mV above VDD and below VSS. The wide input commonmode voltage range allows the op amp to be used as a buffer and as a differential amplifier in a wide-variety of signal processing applications. Output voltage high/ low is designed to be only 50mV above VSS and below VDD allowing maximum dynamic range in single-supply applications. The high output current and capacitance drive capability of the devices make them ideal as an ADC driver and a line driver. Shutdown Operation The MAX44260 features an active-low shutdown mode that puts both inputs and outputs into high impedance and substantially lowers the quiescent current to less than 1FA. Putting the output into high impedance allows multiple outputs to be multiplexed onto a single output line without the additional external buffers. The device does not self-calibrate when exiting shutdown mode VDD VSHDN/VCAL 0V VDD/2 FAST RECOVERY AMPLIFIER ACTIVE MAX44260 OUTPUT 0V VDD/2 MAX44261 OUTPUT 0V AUTOTRIM SEQUENCE RECALIBRATED AMPLIFIER ACTIVE 30µs 10ms Figure 3. CAL vs. SHDN Input Operation 11 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Input Bias Current The ICs feature a high-impedance CMOS input stage and a specialized ESD structure that allows low-input bias current operation at low-input, common-mode voltages. Low-input bias current is useful when interfacing with high-ohmic sensors. It is also beneficial for designing transimpedance amplifiers for photodiode sensors. This makes these devices ideal for ground-referenced medical and industrial sensor applications. Active Filters The MAX44260/MAX44261 are ideal for a wide variety of active filter circuits that make use of their wide bandwidth, rail-to-rail input/output stages and high-impedance CMOS inputs. The Typical Application Circuit shows an example Sallen-Key active filter circuit with a corner frequency of 10kHz. At low frequencies, the amplifier behaves like a simple low-distortion noninverting buffer, while its high bandwidth gives excellent stopband attenuation above its corner frequency. See the Typical Application Circuit. Driver for Interfacing with the MAX11645 ADC The ICs’ tiny size and low noise makes them a good fit for driving 12- to 16-bit resolution ADCs in space-constrained applications. The Typical Application Circuit shows the MAX44260 amplifier output connected to a lowpass filter driving the MAX11645 ADC. The MAX11645 is part of a family of 3V and 5V, 12-bit and 10-bit, 2-channel ADCs. The MAX11645 offers sample rates up to 94ksps and measures two single-ended inputs or one differential input. These ADCs dissipate 670FA at the maximum sampling rate, but just 6FA at 1ksps and 0.5FA in shutdown. Offered in the ultra-tiny, 1.9mm x 2.2mm WLP and FMAX-8 packages, the MAX11645 ADCs are an ideal fit to pair with the MAX44260/MAX44261 amplifiers in portable applications. Where higher resolution is required, refer to the MAX1069 (14-bit) and MAX1169 (16-bit) ADC families. Chip Information Ordering Information PROCESS: BiCMOS PART TEMP RANGE PINPACKAGE TOP MARK MAX44260AXT+ -40NC to +125NC 6 SC70 +AEB MAX44260AYT+ -40NC to +125NC 6 Thin FDFN (Ultra-Thin LGA) +AY MAX44261AXT+ -40NC to +125NC 6 SC70 +AEC +Denotes a lead(Pb)-free/RoHS-compliant package. 12 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.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. 6 SC70 X6SN+1 21-0077 90-0189 6 Thin FDFN (Ultra-Thin LGA) Y61A1+1 21-0190 90-0233 13 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.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. 14 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.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. 15 MAX44260/MAX44261 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps Revision History REVISION NUMBER REVISION DATE 0 6/11 Initial release 1 8/11 Added thin µDFN (ultra-thin LGA) package and updated slew rate and TOC 29 2 10/11 Removed future product information from data sheet 3 2/12 Revised Electrical Characteristics and the Power-Up Autotrim section 4 7/12 Revised Electrical Characteristics and Typical Operating Characteristics DESCRIPTION PAGES CHANGED — 1, 2, 3, 8, 9, 12 12 2, 3, 11 3, 6 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 Products, Inc. 160 Rio Robles, San Jose, CA 95134 408-601-1000 © 2012 Maxim Integrated Products 16 Maxim is a registered trademark of Maxim Integrated Products, Inc.