TPA1286-VS1R

TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Features ◼ ◼ Description Excellent DC specifications The TPA1286 is a low cost, wide supply range ◆ Small voltage offset: ±50uV (MAX) instrumentation amplifier that requires only one external ◆ Small voltage offset drift: 0.2μV/°C (MAX) resistor to set any gain between 1 and 1,000. The TPA1286 ◆ Small input bias current: 1.5nA (MAX) is designed to work with a variety of single voltages. A wide Excellent AC specifications input range and rail-to-rail output allow the signal to make full ◆ CMRR: 80dB @ G=1 (MIN) use of the supply rails. Low voltage offset, low offset drift, low ◆ Small input noise: 15nV/√Hz @ G=10 gain drift, high gain accuracy, and high CMRR make this part ◆ Input noise (0.1 Hz to 10 Hz): 1 μV p-p an excellent choice in applications that demand the best DC ◆ -3dB Bandwidth: 1.6MHz performance. ◆ Slew rate: 5V/us The TPA1286 operates from single 4V to 36V supply, offers ◼ Gain set with 1 external resistor (gain range 1 to 1,000) breakthrough performance throughout the −40°C to +125°C ◼ SUPPLY VOLTAGE: ±2V to ±18V temperature range. It features a zero-drift core, which leads to ◼ RAIL to RAIL for VOLTAGE OUTPUT a typical offset drift of 0.2μV/°C throughout the operating ◼ Operating Temperature: –45°C to +125°C temperature range. ◼ SOP8, MSOP8 & DFN3X3-8 PACKAGE TPA1286 is available in SOP8, MSOP8 and DFN3X3-8 package Applications ◼ Weigh scales for bridge amplifiers ◼ Medical and ECG Amplifiers ◼ Industrial Process Control ◼ Precision data acquisition system ◼ Pressure sensors ◼ Precision current measurement www.3peakic.com.cn 1/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Table of Contents Features .............................................................................................................................................................................................. 1 Applications ......................................................................................................................................................................................... 1 Description .......................................................................................................................................................................................... 1 Revision History .................................................................................................................................................................................. 2 Pin Configuration ................................................................................................................................................................................. 3 Order Information ................................................................................................................................................................................ 4 Absolute Maximum Ratings ................................................................................................................................................................. 4 ESD, Electrostatic Discharge Protection ............................................................................................................................................. 4 Thermal Resistance ............................................................................................................................................................................ 4 Electrical Characteristics ..................................................................................................................................................................... 5 Typical Performance Characteristics ................................................................................................................................................... 7 Operation Overview ........................................................................................................................................................................... 12 Applications Information .................................................................................................................................................................... 12 TPA1286 Application block diagram ........................................................................................................................................... 12 Selecting GAIN Resistor............................................................................................................................................................. 12 REFERENCE INPUT PIN .......................................................................................................................................................... 13 Power Supply Recommendation ................................................................................................................................................ 13 Proper Board Layout .................................................................................................................................................................. 13 TAPE AND REEL INFORMATION ..................................................................................................................................................... 14 Package Outline Dimensions ............................................................................................................................................................ 15 SOIC-8 ....................................................................................................................................................................................... 15 MSOP8 ....................................................................................................................................................................................... 16 DFN3X3-8 .................................................................................................................................................................................. 17 Revision History Date Revision Notes 2020/2/5 Rev.Pre.0 Initial Version 2020/12/25 Rev.A.0 Released version 2021/3/30 Rev.A.1 Add DFN3X3-8 package 2022//5/1 Rev.A.2 Update package outline dimensions www.3peakic.com.cn 2/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Pin Configuration RG 1 IN- 2 IN+ V- TPA1286 8 RG IN- 1 7 V+ RG 2 TPA1286U 8 V+ 7 OUT 3 SOP8 6 OUT RG 3 SOP8 6 REF 4 MSOP8 5 REF IN+ 4 MSOP8 5 V- IN- 1 RG 2 RG 3 IN+ 4 Exposed Thermal Die Pad on Underside 8 V+ 7 VOUT 6 REF 5 V- PIN NAME TPA1286 DESCRIPTION IN- Negative Input IN+ Positive Input. RG Gain setting VREF Reference Input. OUT Output V+ Positive power supply V- Negative power supply Thermal pad Exposed thermal die pad is internally connected to –Vs. Connect externally to –Vs or leave floating. www.3peakic.com.cn 3/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Order Information Model Name TPA1286 Order Number Package Transport Media, Quantity Package Marking TPA1286-SO1R 8-Pin SOP8 Tape and Reel, 4,000 1286 TPA1286U-SO1R 8-Pin SOP8 Tape and Reel, 4,000 1286U TPA1286-VS1R 8-Pin MSOP8 Tape and Reel, 3,000 1286 TPA1286U-VS1R 8-Pin MSOP8 Tape and Reel, 3,000 1286U TPA1286U-DF7R 8-Pin DFN3X3 Tape and Reel, 4,000 286U Absolute Maximum Ratings Note 1 Supply Voltage ………………….................................40V Operating Temperature Range........–40°C to 125°C Input Voltage…………................(V-) – 0.3 to (V+) + 0.3V Maximum Working Junction Temperature...... 150°C Differential Input Voltage ………………….…. (V+) – (V-) Storage Temperature Range........... –65°C to 150°C Input Current: IN+, IN- Note 2..................................±10mA Lead Temperature (Soldering, 10 sec) ……….260°C Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The inputs are protected by ESD protection diodes to power supply. ESD, Electrostatic Discharge Protection Symbol Parameter Condition Minimum Level Unit HBM Human Body Model ESD ANSI/ESDA/JEDEC JS-001 3 kV CDM Charged Device Model ESD ANSI/ESDA/JEDEC JS-002 1.5 kV Thermal Resistance Package Type θJA θJC Unit 8-Pin SOP8 158 43 °C/W 8-Pin MSOP8 210 45 °C/W DFN3X3-8 51 60 °C/W www.3peakic.com.cn 4/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Electrical Characteristics The specifications are at TA = 25°C, V+ = +15V, V- = -15V, REF = 0V, unless otherwise noted Symbol Parameter Conditions Min Typ Max Unit At RTI ±10 ±50 μV At RTI, -40°C to 125°C ±0.1 ±0.2 μV/°C At RTI ±100 ±300 μV At RTI, -40°C to 125°C ±0.2 ±0.3 μV/°C ±10 ±100/G ±50 ±300/G μV ±0.2 ±0.3/G μV/°C (V+) 1.5 V INPUT VOSI VOSO VOS VOS TC VCM Input Stage Offset Voltage Output Stage Offset Voltage Offset Voltage At RTI Input Offset Voltage Drift -40°C to 125°C Common-mode Input Range -40°C to 125°C Common Mode Rejection Ratio CMRR at DC, G=1 80 100 dB CMRR at DC, G=10 100 120 dB CMRR at DC, G=100 110 130 CMRR at DC, G=1000 120 140 CMRR IB IOS Input impedance Input Bias Current 0.3 -40°C to 125°C 0.3 -40°C to 125°C Input impedance PSRR 1.5 10 Input Offset Current Power Supply Rejection Ratio RIN (V-) +0.1 nA pA/°C 1.5 nA 10 pA/°C Differential 57||6 GΩ||pF Common mode 44||14 GΩ||pF G=1 100 120 dB G=10 110 130 dB G=100 120 138 dB G=1000 130 140 dB 20 kΩ f = 1kHz，G=10 15 nV/√Hz f = 0.1Hz to 10Hz, G=1 1 μV p-p Reference input NOISE RTI en Input Voltage Noise Density OUTPUT G G = 1 + (49.4 kΩ/RG) Gain Error GE G TC Gain Vs Temperature www.3peakic.com.cn 1 1000 G=1 ±0.01% ±0.05% G=10 ±0.1% ±0.15% G=100 ±0.1% ±0.2% G=1000 ±0.3% ±0.6% 1 5 -40°C to 125°C, G=1 5/ 17 V/V ppm/°C Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Symbol Parameter Conditions Min Typ Max Unit ISC Short circuit current -40°C to 125°C ±70 mA VOH Output Swing from Supply Rail -40°C to 125°C, RL = 10 kΩ 0.12 0.2 V VOL Output Swing from Supply Rail -40°C to 125°C, RL = 10 kΩ 0.05 0.1 V G=1 1600 kHz G=10 400 kHz G=100 100 kHz G=1000 11 kHz FREQUENCY RESPONSE BW -3dB Bandwidth ST Setting time to 0.01% G=1 2.1 μs SR Slew Rate G=1 5 V/μs 2.5 V/μs G=100 POWER SUPPLY V+ Supply Voltage IQ Quiescent Current ±2 3.8 ±18 V 4.5 mA 125 °C TEMPERATURE RANGE Specified range www.3peakic.com.cn -40 6/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Typical Performance Characteristics The TPA1286 is used for characteristics at TA = 25°C, Vs = ±15V, RL = 10 kΩ, unless otherwise noted. 70 IB+ IBIOS 10 8 G=1000 G=100 G=10 G=1 60 50 Gain(dB) Input Bias Current(nA) 12 6 4 2 40 30 20 10 0 0 -2 -10 -50 0 50 100 150 10 1,000 Temperature(℃) Figure 1 IB Vs. Temperature 160 160 120 G=1 G=10 G=100 G=1000 140 Negative PSRR (dB) Positive PSRR (dB) 10,000,000 Figure 2 Gain Vs. Frequency G=1000 G=100 G=10 G=1 140 100 80 60 40 120 100 80 60 40 20 10 100 1,000 10,000 20 100,000 10 100 Frequency(Hz) 1000 10000 100000 Frequency(Hz) Figure 3 Positive PSRR Vs. Frequency Figure 4 Negative PSRR Vs. Frequency 2 1000 Voltage Noise(nV/√Hz) 1.5 1 Noise(uV) 100,000 Frequency(Hz) 100 0.5 0 -0.5 -1 -1.5 -2 10 1 G=1 G=10 G=100 G=1000 0 0 2 4 6 8 10 1 Time(s/div) 10,000 1,000,000 Frequency(Hz) Figure 5 0.1Hz to 10Hz RTI Noise www.3peakic.com.cn 100 Figure 6 Noise Density Vs Frequency 7/ 17 Rev.A.2 TPA1286 140 130 120 110 100 90 80 70 60 50 40 30 120 CMRR (dB) EMI Rejection-Ratio(dB) High Voltage, Precision, Zero-drift, Instrumentation Amplifier 100 80 60 G=1 G=10 G=100 G=1000 40 10 100 20 1000 10 Frequency(MHz) 100 100,000 Figure 8 CMRR Vs. Frequency 0 20 -2 -40℃ 18 -4 25℃ 16 -6 125℃ Output Voltage(V) Output Voltage(V) 10,000 Frequency(Hz) Figure 7 EMIRR -8 -10 -12 -14 14 12 10 8 6 4 -40℃ -18 2 25℃ -20 0.00 0 0.00 125℃ -16 0.05 0.10 0.15 0.20 0.05 0.10 0.15 Output Current(A) Output Current(A) Figure 9 Negative Output Voltage Swing Vs. Output Voltage Figure 10 Positive Output Voltage Swing Vs. Output Voltage 0 2.5 -0.5 2 -40℃ Output Voltage(V) Output Voltage(V) 1,000 -1 -1.5 -40℃ -2 25℃ -2.5 0.00 125℃ 0.05 0.10 0.15 125℃ 1.5 1 0.5 0 0.00 0.02 0.04 0.06 Output Current(A) Output Currrent(A) Figure 11 Negative Output Voltage Swing Vs. Output Voltage www.3peakic.com.cn 25℃ Figure 12 Positive Output Voltage Swing Vs. Output Voltage 8/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier 3.4 1 G=1,1Vrms out,2kΩ load 3.2 Supply Current(mA) THD + N (%) G=10,1Vrms out,2kΩ load 0.1 3 2.8 2.6 0.01 2.4 2.2 IN+ = V- = 0V，IN- = V- = 0V 0.001 10 100 1000 2 10000 0 5 10 Frequency(Hz) Figure 13 THD + N Vs. Frequency 25 30 4 3 Nonlinearity(ppm) 3.8 Supply Current(mA) 20 Figure 14 Supply Current Vs. Voltage 3.9 3.7 3.6 3.5 3.4 3.3 3.2 2 1 0 -1 -2 -3 3.1 -4 3.0 -50 0 50 100 -10 150 -5 0 5 10 Outout Voltage(V) Temperature(℃) Gain=1000 Figure15 Supply Current Vs. Temp Figure 16 Gain Nonlineraity 10 20 8 15 6 Nonlinearity(ppm) Nonlinearity(ppm) 15 Supply Voltage(V) 4 2 0 -2 -4 10 5 0 -5 -10 -6 -15 -8 -10 -20 -10 -5 0 5 10 Output Voltage(V) -5 0 5 10 Output Voltage(V) Gain=10 Gain=100 Figure 17 Gain Nonlinearity www.3peakic.com.cn -10 Figure 18 Gain Nonlinearity 9/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier 50 Nonlinearity(ppm) 40 30 20 10 0 -10 -20 -30 -40 -50 -10 -5 0 5 10 Output Voltage(V) Voltage: 2V/div for Output, Time: 10us/div G=1, VREF = Gain=1 GND; VIN=10VPP, Load R=10K Figure 19 Gain Nonlinearity Figure 20 Slew Rate Voltage: 5V/div for Output, Time: 2us/div G=10, VREF = GND; Voltage: 5V/div for Output, Time: 2us/div G=10, VREF = VIN=10VPP, Load R=10K C=100pF GND; VIN=10VPP, Load R=10K C=100pF Figure 21 Positive Overload Recovery Figure 22 Negative Overload Recovery Voltage: 2V/div for Output, Time: 10us/div G=1, VREF = GND; Voltage: 2V/div for Output, Time: 20us/div G=10, VREF = VIN=10VPP, Load R=10K C=100pF GND; VIN=1VPP, Load R=10K C=100pF Figure 23 Large-Signal Pulse Response Figure 24 Large-Signal Pulse Response www.3peakic.com.cn 10/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Voltage: 2V/div for Output, Time: 20us/div G=100, VREF = Voltage: 2V/div for Output, Time: 50us/div G=1000, VREF = GND; VIN=0.1VPP, Load R=10K C=100pF GND; VIN=10mVPP, Load R=10K C=100pF Figure 25 Large-Signal Pulse Response Figure 26 Large-Signal Pulse Response Voltage: 25mV/div for Output, Time: 10us/div G=1, VREF = Voltage: 20mV/div for Output, Time: 20us/div G=10, VREF = GND; VIN=100mVPP, Load R=10K C=100pF GND; VIN=10mVPP, Load R=10K C=100pF Figure 27 Small-Signal Pulse Response Figure 28 Small-Signal Pulse Response Voltage: 50mV/div for Output, Time: 20us/div G=100, VREF = Voltage: 500mV/div for Output, Time: 50us/div G=10, VREF = GND; VIN=2mVPP, Load R=10K C=100pF GND; VIN=2mVPP, Load R=10K C=100pF Figure 29 Small-Signal Pulse Response Figure 30 Small-Signal Pulse Response www.3peakic.com.cn 11/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Operation Overview The TPA1286 is a monolithic instrumentation amplifier (INA) based on the high voltage, precision zero-drift OPA core, and classic 3op amp topology. The TPA1286 also integrates precision resistors to ensure excellent common mode rejection and low gain error. The combination of the zero-drift amplifier core and the precision resistors allows this device to achieve outstanding dc precision and makes the TPA1286 ideal for many high-voltage industrial applications. A unique pinout of the TPA1286U enable to meet a good CMRR specification. The balanced pinout reduces the parasitic that had adversely affected CMRR performance. In addition, this pinout simplifies board layout because associated traces are grouped together. For example, the gain setting resistor pins are adjacent to the inputs, and the reference pin is next to the output. Applications Information TPA1286 Application block diagram Selecting GAIN Resistor The gain of the TPA1286 is set by a single external resistor, RG, connected between RG pins. The value of RG is selected according to below Equation. TPA1286 can be set as G = 1 when no gain resistor is used. Gain accuracy is determined by the accuracy of RG. The stability and temperature drift of the external gain setting resistor, RG, also affects gain. The contribution of RG to gain accuracy and drift can be determined from below equation. 𝐺 =1+ www.3peakic.com.cn 49.4k RG 12/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier REFERENCE INPUT PIN As shown in above Figure, the reference pin, REF, is connected with a 20 kΩ resistor. The output of the instrumentation amplifier is referenced to the voltage on the REF pin; this is useful when the output signal needs to be offset to a precise mid-supply level. For example, a voltage source can be tied to the REF pin to level-shift the output so that the TPA1286 can interface with an ADC. For best performance, source impedance to the REF pin should be kept as low as possible, because parasitic resistance can adversely affect CMRR and gain accuracy. PCB Layout should be very careful to tie REF to the appropriate local cleaning ground. Power Supply Recommendation A stable and cleaning dc voltage should be used to be as power supply of the instrumentation amplifier, which noise on the supply pins can affect performance. Bypass capacitors should be used to decouple the amplifier. A 0.1 μF capacitor should be placed close to each supply pin. Proper Board Layout To maximizes system performance, careful board layout is needed. Traces from the gain setting resistor to the RG pins should be kept as short as possible to minimize parasitic inductance. To ensure the most accurate output, the trace from the REF pin should either be connected to the local ground of the TPA1286, or connected to a voltage that is referenced to the local ground of the TPA1286 www.3peakic.com.cn 13/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier TAPE AND REEL INFORMATION Order Number Package D1 W1 A0 B0 K0 P0 W0 Pin1 (mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant TPA1286-SO1R 8-Pin SOP 330.0 17.6 6.4 5.4 2.1 8.0 12.0 Q1 TPA1286U-SO1R 8-Pin SOP 330.0 17.6 6.4 5.4 2.1 8.0 12.0 Q1 TPA1286-VS1R 8-Pin MSOP 330.0 17.6 5.2 3.3 1.5 8.0 12.0 Q1 TPA1286U-VS1R 8-Pin MSOP 330.0 17.6 5.2 3.3 1.5 8.0 12.0 Q1 TPA1286U-DF7R DFN3X3-8 330.0 16.8 3.3 3.3 1.1 8.0 12.0 Q2 www.3peakic.com.cn 14/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier Package Outline Dimensions SOIC-8 www.3peakic.com.cn 15/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier MSOP8 www.3peakic.com.cn 16/ 17 Rev.A.2 TPA1286 High Voltage, Precision, Zero-drift, Instrumentation Amplifier DFN3X3-8 3PEAK and the 3PEAK logo are registered trademarks of 3PEAK INCORPORATED. All other trademarks are the property of their respective owners. www.3peakic.com.cn 17/ 17 Rev.A.2