MAX41400ANL+

EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain General Description Benefits and Features The MAX41400 is a low-power, high-precision instrumentation amplifier with programmable gain through input pins. ● ● ● ● ● Available in a space-saving, 9-bump wafer-level package (WLP) with a 0.4mm bump pitch, it is designed for use in portable medical and industrial sensor applications. The device features internal EMI filters to protect from RF disturbances and EMI. The internal fixed gain can be selected from 10V/V to 250V/V. The gain-setting resistors are located inside the device, thus minimizing gain drift variations over the temperature range. The MAX41400 features rail-to-rail CMOS inputs and outputs; a 28kHz, -3dB bandwidth at just 65µA (typ) supply current; and 25µV (max) zero-drift input offset voltage over time and temperature. The zero-drift feature eliminates the high 1/f noise typically found in CMOS input amplifiers, making it useful for a wide variety of low-frequency measurement applications. The MAX41400 operates from a 1.7V to 3.6V power supply voltage and is specified over the -40°C to +125°C automotive temperature range. Applications ● ● ● ● ● ● Low-Power Sensor Interface Pressure, Weight, and Force Sensors RTD Temperature Sensors Wearable Devices EKG Medical Devices Insulin and Infusion Pumps 19-100852; Rev 2; 7/21 Supply Voltage Range: 1.7V to 3.6V Very Low 25μV (max) Input Offset Voltage Low 65μA Quiescent Current Rail-to-Rail Inputs and Outputs EMIRR • >100dB at 1800MHz, 2400MHz • >90dB at 900MHz ● 28kHz, -3dB Bandwidth ● On-the-Fly Programmable Gain: • 10V/V, 20V/V, 40V/V, 80V/V, 100V/V, 150V/V, 200V/V, and 250V/V ● Power-Saving Shutdown Mode ● Available in Tiny 1.26mm x 1.23mm, 9-Bump WLP and 2.5mm x 2mm, 10-Pin TDFN Ordering Information appears at end of data sheet. MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain Simplified Block Diagram VDD MAX41400 IN- G0 G1 G2 IN+ EMI FILTER GAIN: 8 STEPS FROM 10V/V TO 250V/V EMI FILTER SHDN_ www.maximintegrated.com OUT GND REFIN Maxim Integrated | 2 MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain TABLE OF CONTENTS General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Benefits and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Ultra-Thin WLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 10 TDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 WLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 TDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Gain-Selection Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Input Stage and Output Stage Gain Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input Common-Mode Range vs. Output Voltage Characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Shutdown Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 External Noise Suppression in EMI Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Input Offset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 External Offset Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Gain-Selection Input Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Capacitive-Load Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Power Supplies and Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Transducer Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Typical Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Transducer Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 PT100 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 www.maximintegrated.com Maxim Integrated | 3 MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain LIST OF FIGURES Figure 1. MAX41400 Internal Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 2. Common-Mode Input Range over Output Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 3. Strain Gauge Connection to MAX41400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 4. Three-Wire PT100 Sensing Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 www.maximintegrated.com Maxim Integrated | 4 MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain LIST OF TABLES Table 1. Gain Selection (TDFN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 2. Gain Selection (WLP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 3. Input Stage and Output Stage Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 www.maximintegrated.com Maxim Integrated | 5 MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain Absolute Maximum Ratings VDD to GND.............................................................. -0.3V to +4V IN+ to IN- ..................................................... -0.3V to VDD + 0.3V OUT, REF to GND ........................................ -0.3V to VDD + 0.3V IN+, IN-, G0, G1, G2, SHDN_ to GND ......... -0.3V to VDD + 0.3V Continuous Current into any Input/Output Pin ..................... 10mA Output Short-Circuit Duration to Either VDD or GND.. Continuous Continuous Power Dissipation (WLP - derate 11.91mW/°C above +70°C) ......................................................................... 952.61mW Continuous Power Dissipation (TDFN - derate 9.80mW/°C above +70°C) ...............................................................................784mW Operating Temperature Range ...........................-40°C to +125°C Junction Temperature ....................................................... +150°C Storage Temperature Range ..............................-40°C to +150°C Soldering Temperature (reflow) ........................................ +260°C 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 Information Ultra-Thin WLP Package Code N91F1+1 Outline Number 21-100443 Land Pattern Number Refer to Application Note 1891 Thermal Resistance, Four-Layer Board: Junction to Ambient (θJA) 83.98°C/W Junction to Case (θJC) 24.60°C/W 10 TDFN Package Code T102A2+2C Outline Number 21-100013 Land Pattern Number 90-100007 Thermal Resistance, Four-Layer Board: Junction to Ambient (θJA) 102°C/W Junction to Case (θJC) 2.90°C/W 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 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 (Global conditions unless otherwise stated: VDD = 1.8V, VIN+ = VIN- = VDD/2, VREFIN = VDD/2, G = 10V/V, RLOAD = 10kΩ to VDD/2, VSHDN_ = VDD, typical values at +25°C, -40°C ≤ TA ≤ +125°C) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC SPECIFICATIONS Input Offset Voltage Input Offset Drift Input Bias Current www.maximintegrated.com VOS -40°C ≤ TA ≤ +85°C All gain options 1 25 -40°C ≤ TA ≤ +125°C All gain options 1 35 µV TCVOS IB 5 nV/°C TA = +25°C Note 1 10 150 -40°C ≤ TA ≤ +125°C Note 1 10 300 pA Maxim Integrated | 6 MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain Electrical Characteristics (continued) (Global conditions unless otherwise stated: VDD = 1.8V, VIN+ = VIN- = VDD/2, VREFIN = VDD/2, G = 10V/V, RLOAD = 10kΩ to VDD/2, VSHDN_ = VDD, typical values at +25°C, -40°C ≤ TA ≤ +125°C) PARAMETER Input Offset Current Input Common-Mode Range SYMBOL IOS VCM Input ESD Protections Common-Mode Rejection Ratio Power-Supply Rejection Ratio Range of Gain Gain Error Tempco MIN Note 1 CMRR Guaranteed by CMRR PSRR -40°C ≤ TA ≤ +125°C 1.7V ≤ VDD ≤ 3.6V 106 120 Gain = 40 115 130 Gain = 100 120 130 Gain = 200 120 130 Gain = 10 98 110 Gain = 40 110 120 Gain = 100 113 130 Gain = 200 113 130 All gain options V kV dB dB WLP: 10, 40, 100, 200 TDFN: 10, 20, 40, 80, 100, 150, 200, 250 V/V 20 μs 0.05 TCGE UNITS pA 2 Gain = 10 VOUT to settle within ±100mV -40°C ≤ TA ≤ +125°C MAX VDD 0.1 0.1 G GE TYP 10 HBM, both IN+ and IN- Gain Selection Settling Time Gain Error CONDITIONS 0.18 5 % ppm/°C Output Voltage Swing High VOH VDD - VOUT RLOAD = 10kΩ to VDD/2 50 mV Output Voltage Swing Low VOL VOUT - GND RLOAD = 10kΩ to VDD/2 25 mV VDD V INPUT REFERENCE Input Reference Voltage Range VREFIN 0 AC SPECIFICATIONS Bandwidth, -3dB Gain = 10 28 Gain = 40 28 Gain = 100 10 Gain = 200 Slew Rate www.maximintegrated.com SR kHz 5 0.08 V/µs Maxim Integrated | 7 MAX41400 Low-Power, Precision Instrumentation Amplifier with Programmable Gain Electrical Characteristics (continued) (Global conditions unless otherwise stated: VDD = 1.8V, VIN+ = VIN- = VDD/2, VREFIN = VDD/2, G = 10V/V, RLOAD = 10kΩ to VDD/2, VSHDN_ = VDD, typical values at +25°C, -40°C ≤ TA ≤ +125°C) PARAMETER Input Voltage-Noise Density SYMBOL VN Input Voltage Noise EMI Rejection Ratio EMIRR Input Current-Noise Density IN Capacitive Loading Stability CL CONDITIONS MIN MAX UNITS WLP: 54 38 41 36 TDFN: 47 46 43 42 nV/√Hz 0.1Hz to 10Hz, gain = 10 1.3 µVP-P VRFPEAK = 100mVPK, f = 900MHz, both IN+ and IN- >90 VRFPEAK = 100mVPK, f = 1800MHz, 2400MHz, both IN+ and IN- >100 f = 1kHz 100 fA/√Hz 100 pF f = 10Hz, 1kHz, 10kHz WLP: G = 10V/V G = 40V/V G = 100V/V G = 200V/V TDFN: G = 20V/V G = 80V/V G = 150V/V G = 250V/V TYP dB POWER SUPPLY Supply Voltage VDD Supply Current IDD Power-Up Time tON Shutdown Supply Current ISHDN Turn-On Time tONSD Guaranteed by PSRR, -40°C ≤ TA ≤ +125°C 1.7 65 3.6 V 90 µA VOUT to settle within 90% VDD = 0 to 1.8V step 100 -40°C ≤ TA ≤ +85°C Note 1 0.1 0.3 -40°C ≤ TA ≤ +125°C Note 1 0.1 0.7 VOUT to settle within 90% VDD = 1.8V, VSHDN = 0 to 1.8V step in