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TSC101

TSC101

  • 厂商:

    STMICROELECTRONICS(意法半导体)

  • 封装:

  • 描述:

    TSC101 - High side current sense amplifier - STMicroelectronics

  • 数据手册
  • 价格&库存
TSC101 数据手册
TSC101 High side current sense amplifier Features ■ ■ ■ ■ ■ ■ ■ Independent supply and input common-mode voltages Wide common-mode operating range: 2.8 to 30V Wide common-mode surviving range: -0.3 to 60V (load-dump) Wide supply voltage range: 4 to 24V Low current consumption: ICC max = 300µA Internally fixed gain: 20V/V, 50V/V or 100V/V Buffered output L SOT23-5 (Plastic package) Pin connections (top view) Applications Out 1 ■ ■ ■ ■ ■ ■ 5 Vcc Automotive current monitoring Notebook computers DC motor control Photovoltaic systems Battery chargers Precision current sources Vp 3 4 Vm Gnd 2 Description The TSC101 measures a small differential voltage on a high-side shunt resistor and translates it into a ground-referenced output voltage. The gain is internally fixed. Wide input common-mode voltage range, low quiescent current, and tiny SOT23 packaging enable use in a wide variety of applications. Input common-mode and power supply voltages are independent. Common-mode voltage can range from 2.8V to 30V in operating conditions and up to 60V in absolute maximum ratings. Current consumption lower than 300µA and wide supply voltage range allow to connect the power supply to either side of the current measurement shunt with minimal error. October 2007 Rev 2 1/17 www.st.com 17 Application schematics and pin description TSC101 1 Application schematics and pin description The TSC101 high-side current-sense amplifier features a 2.8V to 30V input common-mode range that is independent of supply voltage. The main advantage of this feature is to allow high-side current sensing at voltages much greater than the supply voltage (VCC). Figure 1. Application schematics Vsense 2.8V to 30V Rsense 3 4 Iload load Vm Rg2 Vp Rg1 4V to 24V 5 VCC 1 Rg3 Out Vout=Av.Vsense Gnd 2 Table 1 describes the function of each pin. The pin positions are shown in the illustration on the cover page and in Figure 1 above. Table 1. Symbol Out Gnd VCC Vp Vm Pin descriptions Type Analog output Power supply Power supply Analog input Analog input Function The output voltage, proportional to the magnitude of the sense voltage Vp-Vm. Ground line. Positive power supply line. Connection for the external sense resistor. The measured current enters the shunt on the Vp side. Connection for the external sense resistor. The measured current exits the shunt on the Vm side. 2/17 TSC101 Absolute maximum ratings and operating conditions 2 Absolute maximum ratings and operating conditions Table 2. Symbol Vid Vi VCC Vout Tstg Tj Rthja ESD Absolute maximum ratings Parameter Input pins differential voltage (Vp-Vm) Input pin voltages (Vp and Vm) DC supply voltage (1) (1) Value ±60 -0.3 to 60 -0.3 to 25 -0.3 to VCC -55 to 150 150 250 2.5 150 Unit V V V V °C °C °C/W kV V DC output pin voltage(1) Storage temperature Maximum junction temperature SOT23-5 thermal resistance junction to ambient HBM: human body model(2) MM: machine model (3) 1. Voltage values are measured with respect to the ground pin. 2. Human body model: A 100pF capacitor is charged to the specified voltage, then discharged through a 1.5kΩ 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 200pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5Ω). This is done for all couples of connected pin combinations while the other pins are floating. Table 3. Symbol VCC Toper Vicm Operating conditions Parameter DC supply voltage from Tmin to Tmax Operational temperature range (Tmin to Tmax) Common mode voltage range Value 4.0 to 24 -40 to 125 2.8 to 30 Unit V °C V 3/17 Electrical characteristics TSC101 3 Table 4. Symbol ICC Electrical characteristics Supply(1) Parameter Total supply current Test conditions Vsense=0V Tmin < Tamb < Tmax Min. Typ. 165 Max. 300 Unit µA 1. Unless otherwise specified, the test conditions are Tamb=25°C, VCC=12V, Vsense=Vp-Vm=50mV, Vm=12V, no load on Out. Table 5. Symbol Input(1) Parameter Common mode rejection Variation of Vout versus Vicm referred to input(2) Supply voltage rejection Variation of Vout versus VCC(3) Input offset voltage(4) Input offset drift vs. T Input leakage current Input bias current Test conditions 2.8V< Vicm < 30V Tmin < Tamb < Tmax 4.0V< VCC < 24V Vsense=30mV Tmin < Tamb < Tmax Tamb= 25° C Tmin < Tamb < Tmax Tmin < Tamb < Tmax VCC= 0V Tmin < Tamb < Tmax Vsense= 0V Tmin < Tamb < Tmax 5.5 Min. Typ. Max. Unit CMR 90 105 dB SVR 90 105 ±0.2 ±0.9 -3 1 8 ±1.5 ±2.3 dB Vos dVos/dT Ilk Iib mV µV/°C µA µA 1. Unless otherwise specified, the test conditions are Tamb=25°C, VCC=12V, Vsense=Vp-Vm=50mV, Vm=12V, no load on Out. 2. See Common mode rejection ratio (CMR) on page 11 for the definition of CMR. 3. See Supply voltage rejection ratio (SVR) on page 11 for the definition of SVR. 4. See Gain (Av) and input offset voltage (Vos) on page 11 for the definition of Vos. 4/17 TSC101 Table 6. Symbol Av Gain Electrical characteristics Output(1) Parameter Test conditions TSC101A TSC101B TSC101C Tamb=25°C Tmin < Tamb < Tmax Tmin < Tamb < Tmax -10mA < Iout
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