TPA1295F-SO1R-S

TPA1295 HV, Bi-directional Current Sense Amplifier Features ◼ Description SMALL VOLTAGE OFFSET: ◆ TPA1295: ±100uV (MAX) The TPA1295 family is of high voltage, Bi-directional current sense amplifier with voltage output. The TPA1295 can ◼ WIDE COMMON MODE VOLTAGE: -0.3V to +70V sense drops across shunts at common-mode voltages from – ◼ WIDE CMRR THROUGH COMMON VOLTAGE: 130dB 0.3V to 70 V. The TPA1295 are available with three output ◼ SUPPLY VOLTAGE: 3V to +18V voltage scales: 20V/V, 50V/V, 100V/V, with up to 500KHz ◼ ACCURACY and ZERO-DRIFT PERFORMANCE bandwidth. ◼ The TPA1295 operates from single 3V to 18V supply, offers ◆ ±0.5% Gain Error (Max, -40°C ~125°C) ◆ 0.5μV/°C Offset Drift (Max, -40°C ~125°C) breakthrough performance throughout the −40°C to +125°C ◆ 5ppm/°C Gain Drift (Max, -40°C ~125°C) temperature range. It features a zero-drift core, which leads to THREE GAIN OPTIONS for VOLTAGE OUTPUT a typical offset drift of 0.4μV/°C throughout the operating ◆ TPA1295T: 20V/V temperature range and the common-mode voltage range. ◆ TPA1295F: 50V/V The TPA1295 family is offered in 8-pin SOP package. ◆ TPA1295H: 100V/V Applications ◼ CURRENT SENSING (High−Side/Low-Side) ◼ BATTERY CHARGERS & POWER MANAGEMENT ◼ AUTOMOTIVE ◼ INDUSTRIAL CONTROL AND AUTOMATION ◼ BASE STATIONS & TELECOM EQUIPMENT www.3peakic.com.cn 1/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Table of Contents Features .............................................................................................................................................................................................. 1 Applications ......................................................................................................................................................................................... 1 Description .......................................................................................................................................................................................... 1 Revision History .................................................................................................................................................................................. 2 Functional Block Diagram & Pin Configuration .................................................................................................................................... 3 Order Information ................................................................................................................................................................................ 4 Absolute Maximum Ratings ................................................................................................................................................................. 4 ESD, Electrostatic Discharge Protection ............................................................................................................................................. 4 Thermal Resistance ............................................................................................................................................................................ 4 Electrical Characteristics ..................................................................................................................................................................... 5 Typical Performance Characteristics ................................................................................................................................................... 6 Operation Overview ............................................................................................................................................................................. 7 Applications Information ...................................................................................................................................................................... 8 TPA1295 Application block diagram ............................................................................................................................................. 8 Reference pin connection for Bi-directional and Unidirectional Current Measurements ............................................................... 8 Selecting Rsense ......................................................................................................................................................................... 8 Recommended Component Values .............................................................................................................................................. 8 Power Supply Recommendation .................................................................................................................................................. 8 Tape and Reel Information .................................................................................................................................................................. 9 Package Outline Dimensions ............................................................................................................................................................ 10 SOP8.......................................................................................................................................................................................... 10 Revision History Date Revision Notes 2019/10/15 Rev.Pre Initial Version 2020/12/11 Rev. A.0 Released Version 2022/5/1 Rev. A.1 Update order information and package outline dimensions www.3peakic.com.cn 2/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Functional Block Diagram & Pin Configuration VS TPA1295 R4 R1 -IN OUT +IN R2 VREF1 R3 VREF2 GND IN- 1 GND 2 VREF2 3 NC 4 TPA1295 SOP8 PIN No. PIN NAME TPA1295 DESCRIPTION 1 IN- Negative Input 2 GND Ground 3 VREF2 Reference Input 2 4 NC Not connected 5 OUT Output 6 Vs Power supply 7 VREF1 Reference Input 1 8 IN+ Positive Input www.3peakic.com.cn 3/ 10 8 IN+ 7 VREF1 6 Vs 5 OUT Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Order Information Model Name TPA1295 Order Number Gain Package Transport Media, Quantity Package Marking TPA1295T-SO1R-S Note 1 20V/V 8-Pin SOP Tape and Reel, 4,000 295T TPA1295F-SO1R-S 50V/V 8-Pin SOP Tape and Reel, 4,000 295F 100V/V 8-Pin SOP Tape and Reel, 4,000 295H TPA1295H-SO1R-S Note 1 Note 1: Future product, contact 3PEAK factory for more information and sample. Absolute Maximum Ratings Note 2 Supply Voltage …………………..................................18V Operating Temperature Range........–40°C to 125°C Input Common Voltage (Continuous)...............-0.3 to 75V Maximum Junction Temperature................... 150°C Input Current: +IN, –IN Note 3.................................±10mA Storage Temperature Range.......... –65°C to 150°C Note 2: 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 3: 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 2 kV CDM Charged Device Model ESD ANSI/ESDA/JEDEC JS-002 1.5 kV Thermal Resistance Package Type θJA θJC Unit 8-Pin SOP 158 43 °C/W www.3peakic.com.cn 4/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Electrical Characteristics The specifications are at TA = 25°C, VSENSE = VIN+ – VIN– = 1mV, Vs = 12V, VIN+ = 70V, unless otherwise noted Symbol Parameter Conditions Min Typ Max Unit ±10 ±100 μV 0.5 μV/°C 70 V INPUT VOS VOS TC Note 4 VCM CMRR IB Input Offset Voltage Input Offset Voltage Drift -40°C to 125°C Common-mode Input Range -40°C to 125°C -0.1 Common Mode Rejection Ratio -40°C to 125°C, -0.3V < V+ < 70V 110 Input Bias Current 130 dB DC to 50kHz 90 dB -40°C to 125°C, VCM=12V 12 μA -40°C to 125°C, VCM=70V IOS PSRR 210 μA 1 μA Input Offset Current -40°C to 125°C Power Supply Rejection Ratio 3.0V < V+ < 5.5V 110 dB f = 1kHz 55 nV/√Hz TPA1295T 20 V/V TPA1295F 50 V/V TPA1295H 100 V/V NOISE RTI Note 5 en Input Voltage Noise Density OUTPUT G GE Gain Gain Error -40°C to 125°C ±0.1% ±0.5% GE TC Gain Error Vs Temperature -40°C to 125°C 3 5 CLOAD Maxim capacitive load No oscillation 0.5 VOH Output Swing from Supply Rail -40°C to 125°C, Source 500uA 0.10 0.31 V VOL Output Swing from Supply Rail -40°C to 125°C, Sink 500uA 0.01 0.02 V ppm nF FREQUENCY RESPONSE BW Bandwidth All Gain Configuration 500 kHz SR Slew Rate VSENSE = VIN+ – VIN– = 500mV 20 V/μs POWER SUPPLY V+ Supply Voltage IQ Quiescent Current 3 600 18 V 1000 μA 125 °C TEMPERATURE RANGE Specified range -40 Note 4: Maxim specification is calculated with limited sample quantity in laboratory. Note 5: RTI = referred to input. www.3peakic.com.cn 5/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Typical Performance Characteristics The TPA1295T is used for characteristics at TA = 25°C, VSENSE = VIN+ – VIN– = 1mV, Vs = 12V, VIN+ =24V, unless otherwise noted 40 35 30 Vos(uV) 25 20 15 10 5 0 -40 -15 10 35 60 85 110 Temperature (°C) www.3peakic.com.cn 6/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Operation Overview The TPA1295 family is a high voltage power supply, zero drift, difference amplifier that uses a unique architecture to accurately amplify small differential current shunt voltages, especially for fast changing common-mode voltages. In typical applications, the TPA1295 family measures current by amplifying the voltage across a shunt resistor connected to its inputs by 3 gains of 20 V/V, 50V/V, 100V/V. The design provides excellent common-mode rejection, even with PWM common-mode inputs that can change at very fast rates. The TPA1295 features an input offset less than 100uV, and offset drift of less than 400 nV/°C. www.3peakic.com.cn 7/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Applications Information TPA1295 Application block diagram VS TPA1295 R4 -IN R1 OUT +IN R2 VREF1 R3 VREF2 GND Reference pin connection for Bi-directional and Unidirectional Current Measurements The output voltage is set by applying a voltage to the reference voltage inputs, REF1 and REF2. The output of the TPA1295 can be adjusted for unidirectional or bidirectional operation. In unidirectional operation, the output can be set at the negative rail (near ground) or at the positive rail (near Vs) when the differential input is 0 V, both reference inputs are connected to ground or positive supply. In bi-directional operation, the output is set within the output range. Adjusting the output is accomplished by applying voltage(s) to the referenced inputs, VREF1 and VREF2. The output when there is no differential input can be calculated by below equation. Vout = (VREF1+VREF2) * 5/12 Selecting Rsense The zero-drift offset performance of the TPA1295 offers several benefits. Most often, the primary advantage of the low offset characteristic enables lower full-scale drops across the Rsense. For example, non-zero-drift current sense monitors typically require a full-scale range of 100 mV. The TPA1295 family gives equivalent accuracy at a full-scale range on the order of 5~10 mV. This accuracy reduces Rsense dissipation by an order of magnitude with many additional benefits. Alternatively, there are applications that must measure current over a wide dynamic range that can take advantage of the low offset on the low end of the measurement. Most often, these applications can use the lower gains of the TPA1295 to accommodate larger Rsense drops on the upper end of the scale. Recommended Component Values Ideally, the maximum load current develops the full-scale sense voltage across the current-sense resistor. Choose the gain needed to match the maximum output voltage required for the application: Vout = Vsense x Av Where Vsense is the full-scale sense voltage, and Av is the gain of the TP1295. In applications of monitoring a high current, ensure that Rsense is able to dissipate its own I2R power loss. If the resistor’s power dissipation exceeds the nominal value, its value may drift, or it may fail altogether. The TP1295 senses a wide variety of currents with different sense-resistor values. Power Supply Recommendation The input circuitry of the TP1295 can accurately measure beyond its power-supply voltage, V+. For example, the V+ power supply can be 5V, whereas the load power-supply voltage can be as high as 70V. However, the output voltage range of the OUT pin is limited by the voltages on the power-supply pin. www.3peakic.com.cn 8/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Tape and Reel Information Order Number Package D1 W1 A0 B0 K0 P0 W0 (mm) (mm) (mm) (mm) (mm) (mm) (mm) Pin1 Quadrant TPA1295T-SO1R-S 8-Pin SOIC 330.0 17.6 6.4 5.4 2.1 8.0 12.0 Q1 TPA1295F-SO1R-S 8-Pin SOIC 330.0 17.6 6.4 5.4 2.1 8.0 12.0 Q1 TPA1295H-SO1R-S 8-Pin SOIC 330.0 17.6 6.4 5.4 2.1 8.0 12.0 Q1 www.3peakic.com.cn 9/ 10 Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amplifier Package Outline Dimensions SOP8 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 10/ 10 Rev.A.1