TSC1021BIYPT

TSC1021 High-side current sense amplifier Datasheet - production data Related products See TSC103 for higher common-mode operating range (2.9 V to 70 V) Applications Automotive current monitoring Notebook computers Server power supplies Telecom equipment Industrial SMPS Current sharing LED current measurement Features Description Wide common-mode operating range independent of supply: 2.8 V to 30 V Wide common-mode survival range: -32 V to 60 V (reversed battery and load-dump conditions) Maximum input offset voltage: ±1.5 mV for Tamb = 25 °C ±2.3 mV for -40 °C < Tamb < 125 °C Maximum total output voltage error: ±1.5 % for Tamb = 25 °C ±2.5 % for -40 °C < Tamb < 125 °C Maximum variation over temperature: dVos/dT = 8 µV/°C dVout/dT = 100 ppm/°C Low current consumption: ICC max = 300 µA -40 °C to 125 °C operating temperature range Internally fixed gain: 20 V/V, 50 V/V EMI filtering November 2015 The TSC1021 measures a small differential voltage on a high-side shunt resistor and translates it into a ground-referenced output voltage. The TSC1021 has been specifically designed for automotive conditions: load-dump protection up to 60 V, reverse-battery protection up to -32 V, ESD protection up to 4 kV and internal filtering for EMI performance. Input common-mode and power supply voltages are independent: the common-mode voltage can range from 2.8 to 30 V in operating conditions and up to 60 V in absolute maximum ratings while the TSC1021 can be supplied by a 5 V independent supply line. The TSC1021 is housed in a tiny TSSOP8 package and integrates a buffer that provides low impedance output to ease interfacing and avoid accuracy losses. The overall device current consumption is lower than 300 µA. DocID017857 Rev 4 This is information on a product in full production. 1/17 www.st.com Contents TSC1021 Contents 1 Application diagram ........................................................................ 3 2 Pin configuration ............................................................................. 4 3 4 Absolute maximum ratings and operating conditions ................. 5 Electrical characteristics ................................................................ 6 5 Electrical characteristics curves: current sense amplifier ........... 8 6 Parameter definitions .................................................................... 11 7 6.1 Common mode rejection ratio (CMR) .............................................. 11 6.2 Supply voltage rejection ratio (SVR) ............................................... 11 6.3 Gain (Av) and input offset voltage (Vos) ......................................... 11 6.4 Output voltage drift versus temperature .......................................... 11 6.5 Output voltage accuracy ................................................................. 12 Package information ..................................................................... 13 7.1 8 9 2/17 TSSOP8 package information ......................................................... 14 Ordering information..................................................................... 15 Revision history ............................................................................ 16 DocID017857 Rev 4 TSC1021 1 Application diagram Application diagram The TSC1021 high-side current-sense amplifier features a 2.8 V to 30 V input commonmode range that is independent of the supply voltage. The main advantage of this feature is that it allows high-side current sensing at voltages much greater than the supply voltage (VCC). Figure 1: Application schematic: high-line current sensing DocID017857 Rev 4 3/17 Pin configuration 2 TSC1021 Pin configuration Figure 2: Pin connections (top view) Table 1: "Pin description" describes the function of each pin. Their position is shown in the illustration on the cover page and in Figure 2: "Pin connections (top view)" above. Table 1: Pin description 4/17 Pin number Symbol Type 1 Vm Analog input Connection for the external sense resistor. The measured current exits the shunt on the Vm side. 3 Gnd Power supply Ground line 4 Out Analog output Buffered output of the current sensing amplifier 6 VCC Power supply Positive power supply line 8 Vp Analog input Connection for the external sense resistor. The measured current enters the shunt on the Vp side. Function DocID017857 Rev 4 TSC1021 3 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Table 2: Absolute maximum ratings Symbol Vid Vi Parameter Input pins differential voltage (Vp-Vm) Voltage for Vcc, Out pins Tstg Storage temperature Rthja (1) (1) -65 to 150 Maximum junction temperature 150 TSSOP8 thermal resistance junction to ambient HBM: human body model for all other pins MM: machine model -32 to 60 (2) (2) (3) CDM: charged device model V -0.3 to 7 HBM: human body model for Vp and Vm pins ESD Unit ±20 Current sensing input pin voltages (Vp and Vm) V1 Tj Value (4) °C °C/Ω 120 4 kV 2 250 V 1.5 kV Notes: (1) Voltage values are measured with respect to the GND pin. (2) Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating. (3) Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of connected pin combinations while the other pins are floating. (4) Charged device model: all pins and package are charged together to the specified voltage and then discharged directly to ground. Table 3: Operating conditions Symbol Parameter VCC DC supply voltage from Tmin to Tmax Toper Operational temperature range (Tmin to Tmax) Vicm Common-mode voltage range (Vm and Vp pin voltage) DocID017857 Rev 4 Value Unit 3.5 to 5.5 V -40 to 125 °C 2.8 to 30 V 5/17 Electrical characteristics 4 TSC1021 Electrical characteristics The electrical characteristics given in the following tables are measured under the following test conditions unless otherwise specified: T amb = 25 °C, VCC = 5 V, Vsense = Vp-Vm = 50 mV, Vm = 12 V, no load on Out, all gain configurations. Table 4: Supply Symbol Parameter Test conditions ICC Total supply current Vsense = 0 V, -40 °C < Tamb < 125 °C ICC1 Total supply current Vsense = 50 mV, -40 °C < Tamb < 125 °C Min. Typ. — — Min. Typ. 90 105 Max. 300 450 Unit µA Table 5: Electrical performances Symbol Parameter Test conditions DC CMR DC common-mode rejection, variation of Vout versus Vm referred to (1) input 2.8 V < Vm < 30 V, -40 °C < Tamb < 125 °C AC CMR AC common mode rejection, variation of Vout versus Vm referred to input (peak-to-peak voltage variation) 2.8 V < Vm < 30 V, DC to 1 kHz sine wave Supply voltage rejection, variation of Vout versus (1) VCC 3.5 V < VCC < 5.5 V, -40 °C< Tamb < 125°C SVR Vos Input offset voltage (1) Max. dB 75 80 Unit 95 2.8 V < Vm < 30 V, Tamb = 25 °C ±1.5 2.8 V < Vm < 30 V, -40 °C < Tamb < 125 °C ±2.3 mV dVos/dT Input offset drift vs. T -40 °C< Tamb < 125 °C 8 µV/°C dVout/dT Output voltage drift vs. T -40 °C< Tamb < 125 °C 100 ppm/°C Ilk Input leakage current VCC = 0 V, -40 °C < Tamb < 125 °C 1 Iib Input bias current Vsense = 0 V, -40 °C < Tamb < 125 °C 7 Av Gain, (variation of Vout versus Vsense) TSC1021A 20 TSC1021B 50 ΔVout ΔVout/ΔIout 6/17 Total output voltage (2) accuracy Output stage load regulation V/V Vsense = 50 mV, Tamb = 25 °C ±1.5 Vsense = 50 mV, Tmin < Tamb < Tmax ±2.5 Vsense = 100 mV, Tamb = 25 °C ±1.5 Vsense = 100 mV, Tmin < Tamb < Tmax ±2.5 Vsense = 20 mV, Tamb = 25 °C ±7 Vsense = 20 mV, Tmin < Tamb < Tmax ±9 Vsense = 10 mV, Tamb = 25 °C ±12 Vsense = 10 mV, Tmin < Tamb < Tmax ±15 -5 mA < Iout