TSC102IYDT

TSC102 High-side current sense amplifier plus signal conditioning amplifier Datasheet - production data • Output amplifier for tailor-made signal conditioning • -40 °C to 125 °C operating temperature range • 4 kV ESD protection Applications P TSSOP8 (plastic package) • Battery chargers • Automotive current monitoring • Notebook computers • DC motor control • Photo-voltaic systems • Precision current sources D SO8 (plastic package) • Uninterruptible power supplies • High-end power supplies Description Vm 1 8 Vp Gnd 2 7 A3 A1 3 6 Vcc A2 4 5 Out The TSC102 measures a small differential voltage on a high-side shunt resistor and translates it into a ground-referenced output voltage. The device’s wide input common-mode voltage range, low quiescent current and tiny TSSOP8 packaging enable use in a wide variety of applications (also available in SO8 package). Pin connections (top view) The input common-mode and power supply voltages are independent. The common-mode voltage can range from 2.8 to 30 V in operating conditions. Features • Independent supply and input common-mode voltages • Wide common-mode operating range: 2.8 to 30 V • Wide common-mode surviving range: -16 to 60 V (reversed battery and load-dump conditions) The TSC102 is rugged against abnormal conditions on the input pins: Vp and Vm can withstand up to 60 V in case of voltage spikes, as little as -16 V in case of reversed battery, and up to 4 kV in case of electrostatic discharge. In addition to the current sensing amplifier, the TSC102 offers a fully accessible amplifier for output signal conditioning. The device’s overall current consumption is lower than 420 µA. • Low current consumption: ICC max = 420 µA January 2014 This is information on a product in full production. DocID16754 Rev 3 1/23 www.st.com Contents TSC102 Contents 1 Application schematic and pin description . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics curves: current sense amplifier . . . . . . . . . . 8 5 Electrical characteristics curves: signal conditioning amplifier . . . . 11 6 Parameter definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1 Common-mode rejection ratio (CMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.2 Supply voltage rejection ratio (SVR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.3 Gain (Av) and input offset voltage (Vos) . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.4 Output voltage drift versus temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.5 Output voltage accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8.1 TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8.2 SO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 9 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 DocID16754 Rev 3 TSC102 1 Application schematic and pin description Application schematic and pin description The TSC102 high-side current sense amplifier features a 2.8 V to 30 V input common-mode 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 schematics Signal conditioning amplifier Current sense amplifier 5V Vcc TSC102 6 Vp Iload Out 8 Vsense 5 Av=20 V/V Rsense Vm 1 Gnd 2 A1 3 A2 4 7 A3 Vout AM04508 Table 1 describes the function of each pin. Their position is shown in the illustration on the cover page and in Figure 1 above. Table 1. Pin description Symbol Type Out Analog output Gnd VCC Power supply Function Out voltage is proportional to the magnitude of the sense voltage Vp-Vm Ground line Positive power supply line Vp Connection for the external sense resistor. The measured current enters the shunt on the Vp side Vm Connection for the external sense resistor. The measured current exits the shunt on the Vm side Analog input A1 Connection to current sensing amplifier output A2 Connection to signal conditioning amplifier non-inverting input A3 Connection to signal conditioning amplifier inverting input DocID16754 Rev 3 3/23 23 Absolute maximum ratings and operating conditions 2 TSC102 Absolute maximum ratings and operating conditions Table 2. Absolute maximum ratings Symbol Vid Vi Parameter Value Input pins differential voltage (Vp-Vm) Current sensing input pin voltages (Vp and Vm) Voltage for pins A1, A2, A3, Out, Vcc Tstg Storage temperature Tj Rthja ±20 (1) (1) V1 150 TSSOP8 thermal resistance junction to ambient 120 SO8 thermal resistance junction to ambient 125 (3) CDM: charged device model 4 2.5 MM: machine model(4) (5) V -0.3 to 7 -55 to 150 HBM: human body model for Vm and Vp pins(2) ESD -16 to 60 Maximum junction temperature HBM: human body model Unit °C °C/W kV 200 V 1.5 kV 1. These voltage values are measured with respect to the GND pin. 2. Human body model for Vm and Vp: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ resistor between the Vp or Vm pin and Gnd while the other pins are floating. 3. 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. 4. 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. 5. Charged device model: all pins plus package are charged together to the specified voltage and then discharged directly to ground. Table 3. Operating conditions Symbol 4/23 Parameter Value Unit VCC DC supply voltage from Tmin to Tmax 3.5 to 5.5 V Toper Operational temperature range (Tmin to Tmax) -40 to 125 °C Vicm Common-mode voltage range (Vm pin voltage) 2.8 to 30 V DocID16754 Rev 3 TSC102 3 Electrical characteristics Electrical characteristics Unless otherwise specified, the electrical characteristics given in the following tables have been measured under the following test conditions. • Tamb = 25 °C, VCC = 5 V, Vsense = Vp-Vm = 50 mV, Vm = 12 V. • No load on Out pin. • Signal conditioning amplifier used as a buffer (pin A3 connected to pin Out and pin A1 connected to pin A2). Table 4. Supply Symbol Parameter ICC Total supply current ICC1 Test conditions Vsense = 0 V, pin A1 open, pin A2 shorted to Gnd Tmin < Tamb < Tmax Vsense = 50 mV, pin A1 connected to pin A2 Tmin < Tamb < Tmax Min. Typ. Max. 240 420 - Unit µA 420 700 Min. Typ. Max. 90 100 Table 5. Current sensing amplifier input stage Symbol Parameter Test conditions DC CMR1 DC common-mode rejection Variation of Va1 versus Vicm referred to input(1) AC CMR1 AC common-mode rejection Variation of Va1 versus Vicm referred to input (peak-to-peak voltage variation) 2.8 V< Vm < 30 V 1 kHz sine wave 75 2.8 V < Vm < 30 V 10 kHz sine wave 60 SVR1 Supply voltage rejection Variation of Va1 versus VCC(2) 3.5 V< VCC < 5.5 V -40 °C < Tamb < 125 °C Input offset voltage(3) Tamb = 25 ° C -40 °C < Tamb < 125 °C Input offset drift versus T -40 °C < Tamb < 125 °C Ilk Input leakage current VCC = 0 V Tmin < Tamb < Tmax Iib Input bias current Vsense = 0 V Tmin < Tamb < Tmax Vos dVos/dT 2.8 V < Vm < 30 V -40 °C < Tamb < 150 °C 85 Unit dB 90 ±3 ±1.5 ±2.3 mV ±8 µV/°C 1 µA 5 7 1. See Section 6: Parameter definitions for the definition of CMR 2. See Section 6 for the definition of SVR 3. See Section 6 for the definition of Vos DocID16754 Rev 3 5/23 23 Electrical characteristics TSC102 Table 6. Current sensing amplifier output stage Symbol Av Parameter Test conditions Min. Typ. Gain (variation of Va1 versus Vsense) Max. 20 V/V A1 node high-level saturation voltage Voh1 = Vcc-Va1 Vsense = 1 V Ia1 = 1 mA -40 °C< Tamb < 125 °C 85 Vol1 A1 node low-level saturation voltage Vsense =-1 V Ia1 = 1 mA -40 °C< Tamb < 125 °C 75 Isc1 Short-circuit current A1 connected to VCC or Gnd ΔVa1/ΔT Output voltage drift versus T(1) Tmin < Tamb < Tmax ΔVa1/ΔIa1 Output stage load regulation -5 mA < Ia1< +5 mA Ia1 sink or source current ΔVa1 Total output voltage accuracy(2) Vsense = 50 mV Tamb = 25 ° C Tmin < Tamb < Tmax ±2.5 ±4 ΔVa1 Total output voltage accuracy(2) Vsense = 100 mV Tamb = 25 ° C Tmin < Tamb < Tmax ±2.5 ±4 ΔVa1 Total output voltage accuracy(2) Vsense = 20 mV Tamb = 25 ° C Tmin < Tamb < Tmax ±8 ±10 ΔVa1 Total output voltage accuracy(2) Vsense = 10 mV Tamb = 25 ° C Tmin < Tamb < Tmax ±13 ±16 Voh1 Unit 185 mV 10 165 30 0.4 mA ±400 ppm/°C ±2 mV/mA % 1. See Section 6: Parameter definitions for the definition of output voltage drift versus temperature. 2. Output voltage accuracy is the difference with the expected theoretical output voltage Va1-th = Av * Vsense. See Section 6 for a more detailed definition. Table 7. Current sensing amplifier frequency response Symbol Parameter Test conditions Min. Typ. Max. Unit Va1 settling to 1% final value Vsense = 10 mV to 100 mV, Cload = 47 pF - 7 - µs SR Slew rate Vsense = 10 mV to 100 mV 0.2 0.4 - V/µs BW 3 dB bandwidth Cload = 47 pF - 800 - kHz Min. Typ. Max. Unit - 50 - nV/√ Hz ts Table 8. Current sensing amplifier noise Symbol eN 6/23 Parameter Equivalent input noise voltage Test conditions f = 1 kHz DocID16754 Rev 3 TSC102 Electrical characteristics Table 9. Signal conditioning amplifier Symbol Parameter Test conditions Min. Typ. Max. Unit Vicm Common-mode voltage range Tmin < Tamb < Tmax VIO Input offset voltage Va2 = 1 V Tamb = 25 ° C -40° C < Tamb < 150 °C Input offset voltage drift Tmin < Tamb < Tmax 5 µV/°C Input bias current Va2 = Va3 = VCC/2 10 pA Voh2 Output high-level saturation voltage (Voh2 = VCC-Vout) Va2 = 1 V Va3 = 0 V Iout = 1 mA -40° C< Tamb < 125° C 85 185 Vol2 Va2 = 0 V Va3 = 1 V Output low-level saturation voltage Iout = 1 mA -40 °C< Tamb < 125 °C 75 165 Isc2 Short-circuit current ΔVIO Iib ΔVout/ΔIout Output stage load regulation Out connected to VCC or Gnd 0 Vcc ±3.5 ±4.5 mV mV 12 30 -10 mA < Iout < +10 mA Va2 = 1 V Iout sink or source current mA 300 µV/mA CMR2 DC common-mode rejection Variation of VIO versus Vicm Tmin < Tamb < Tmax 0 V