TPA1295H-SO1R-S

TPA1295 3PEAK | Alldatasheet

Document overview

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Technical content

Features

◼ SMALL VOLTAGE OFFSET: ◆ TPA1295: ±100uV (MAX) ◼ WIDE COMMON MODE VOLTAGE: -0.3V to +70V ◼ WIDE CMRR THROUGH COMMON VOLTAGE: 130dB ◼ SUPPLY VOLTAGE: 3V to +18V ◼ ACCURACY and ZERO-DRIFT PERFORMANCE ◆ ±0.5% Gain Error (Max, -40°C ~125°C) ◆ 0.5μV/°C Offset Drift (Max, -40°C ~125°C) ◆ 5ppm/°C Gain Drift (Max, -40°C ~125°C) ◼ THREE GAIN OPTIONS for VOLTAGE OUTPUT ◆ TPA1295T: 20V/V ◆ TPA1295F: 50V/V ◆ TPA1295H: 100V/V

Applications

◼ CURRENT SENSING (High−Side/Low-Side) ◼ BATTERY CHARGERS & POWER MANAGEMENT ◼ AUTOMOTIVE ◼ INDUSTRIAL CONTROL AND AUTOMATION ◼ BASE STATIONS & TELECOM EQUIPMENT

Description

The TPA1295 family is of high voltage, Bi-directional current sense amplifier with voltage output. The TPA1295 can sense drops across shunts at common-mode voltages from – 0.3V to 70 V. The TPA1295 are available with three output voltage scales: 20V/V, 50V/V, 100V/V, with up to 500KHz bandwidth. The TPA1295 operates from single 3V to 18V supply, offers breakthrough performance throughout the −40°C to +125°C temperature range. It features a zero-drift core, which leads t o a typical offset drift of 0.4 μV/°C throughout the operating temperature range and the common-mode voltage range. The TPA1295 family is offered in 8-pin SOP package.

www.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier Table of Contents

Revision History

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.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier Functional Block Diagram & Pin Configuration VS OUT VREF1 VREF2 GND -IN +IN TPA1295 IN- Vs GND VREF1 OUT TPA1295 SOP8 IN+ NC VREF2 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.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier Order Information Model Name Order Number Gain Package Transport Media, Quantity Package Marking TPA1295 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 TPA1295H-SO1R-S Note 1 100V/V 8-Pin SOP Tape and Reel, 4,000 295H Note 1: Future product, contact 3PEAK factory for more information and sample. Absolute Maximum Ratings Note 2 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 Thermal Resistance Package Type θJA θJC Unit 8-Pin SOP 158 43 °C/W 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

www.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier

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 INPUT VOS Input Offset Voltage ±10 ±100 μV VOS TC Note 4 Input Offset Voltage Drift -40°C to 125°C 0.5 μV/°C VCM Common-mode Input Range -40°C to 125°C -0.1 70 V CMRR Common Mode Rejection Ratio -40°C to 125°C, -0.3V < V+ < 70V 110 130 dB DC to 50kHz 90 dB IB Input Bias Current -40°C to 125°C, VCM=12V 12 μA -40°C to 125°C, VCM=70V 210 μA IOS Input Offset Current -40°C to 125°C 1 μA PSRR Power Supply Rejection Ratio 3.0V < V+ < 5.5V 110 dB NOISE RTI Note 5 en Input Voltage Noise Density f = 1kHz 55 nV/√Hz OUTPUT G Gain TPA1295T 20 V/V TPA1295F 50 V/V TPA1295H 100 V/V GE Gain Error -40°C to 125°C ±0.1% ±0.5% GE TC Gain Error Vs Temperature -40°C to 125°C 3 5 ppm CLOAD Maxim capacitive load No oscillation 0.5 nF 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 FREQUENCY RESPONSE BW Bandwidth All Gain Configuration 500 kHz SR Slew Rate VSENSE = VIN+ – VIN– = 500mV 20 V/μs POWER SUPPLY V+ Supply Voltage 3 18 V IQ Quiescent Current 600 1000 μA TEMPERATURE RANGE Specified range -40 125 °C Note 4: Maxim specification is calculated with limited sample quantity in laboratory. Note 5: RTI = referred to input.

www.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier 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 -15 10 35 60 85 110 Vos(uV) Temperature (°C)

www.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier 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 curre nt shunt voltages, especially for fast changing common-mode voltages. In t ypical applications, the TPA1295 family measures current by amplifying the voltage across a shunt resi stor 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.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier Applications Information VS OUT VREF1 VREF2 GND -IN +IN TPA1295 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 TP A1295 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 TP A1295 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 TP A1295 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 I 2R 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 TP129 5 can accurately measure beyond its power -supply voltage, V+. For exampl e, 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.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier Tape and Reel Information Order Number Package D1 (mm) (mm) (mm) (mm) (mm) (mm) (mm) Pin1 Quadrant

www.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier Package Outline Dimensions SOP8

www.3peak.com Rev.A.1 TPA1295 HV, Bi-directional Current Sense Amp lifier IMPORTANT NOTICE AND DISCLAIMER Copyright© 3PEAK 2012-2023. All rights reserved. Trademarks. Any of the 思瑞浦 or 3PEAK trade names, trademarks, graphic marks, and domain names contained in this document /material are the property of 3PEAK. You may NOT reproduce, modify, publish, transmit or distribute any Trademark without the prior written consent of 3PEAK. Performance Information. Performance tests or performance range contained in this document/material are either results of design simulation or actual tests conducted under designated testing environment. Any variation in testing environment or simulation environment, including but not limited to testing method, testing process or testing temperature, may affect actual performance of the product. Disclaimer. 3PEAK provides technical and reliability data (including data sheets), design resources (including reference designs), application or other design recommendations, networking tools, security information and other resources "As Is". 3PEAK makes no warranty as to the absence of defects, and makes no warranties of any kind, express or implied, including without limitation, implied warranties as to merchantability, fitness for a particular purpose or non -infringement of any third -party’s intellectual property rights. Unless otherwise specified in writing, products supplied by 3PEAK are not designed to be used in any life -threatening scenarios, including critical medical applications, automotive safety -critical systems, aviation, aerospace, or any sit uations where failure could result in bodily harm, loss of life, or significant property damage. 3PEAK disclaims all liability for any such unauthorized use.