TSC1031IDT

TSC1031 High-voltage, high-side current sense amplifier Datasheet - production data  Low current consumption: ICC max = 360 μA  Pin selectable gain: 50 V/V or 100 V/V  Buffered output  EMI filtering TSSOP8 (Plastic package) Applications  Automotive current monitoring  DC motor control  Photovoltaic systems  Battery chargers  Precision current sources SO-8 (Plastic package)  Current monitoring of notebook computers  Uninterruptible power supplies  High-end power supplies Description The TSC1031 measures a small differential voltage on a high-side shunt resistor and translates it into a ground-referenced output voltage. The TSC1031’s dedicated schematic eases the implementation of EMI filtering in harsh environments. The gain is adjustable to 50 V/V or 100 V/V by a selection pin. Pin connections (top view) Wide input common-mode voltage range, low quiescent current, and tiny TSSOP8 packaging enable use in a wide variety of applications. Features  Independent supply and input common-mode voltages  Wide common-mode operating range: 2.9 to 70 V in single-supply configuration -2.1 to 65 V in dual-supply configuration  Wide common-mode surviving range: -16 to 75 V (reversed battery and load-dump conditions)  Supply voltage range: 2.7 to 5.5 V in single supply configuration March 2014 This is information on a product in full production. The input common-mode and power supply voltages are independent. The common-mode voltage can range from 2.9 to 70 V in the singlesupply configuration or be offset by an adjustable voltage supplied on the Vcc- pin in the dualsupply configuration. With a current consumption lower than 360 μA and a virtually null input leakage current in standby mode, the power consumption in the applications is minimized. DocID016875 Rev 3 1/26 www.st.com Contents TSC1031 Contents 1 Application schematic and pin description . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 6 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Electrical characteristics curves: current sense amplifier . . . . . . . . . 10 5 Parameter definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.1 Common mode rejection ratio (CMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.2 Supply voltage rejection ratio (SVR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.3 Gain (Av) and input offset voltage (Vos) . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.4 Output voltage drift versus temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.5 Input offset drift versus temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.6 Output voltage accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 Maximum permissible voltages on pins . . . . . . . . . . . . . . . . . . . . . . . . 18 7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8.1 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 8.2 TSSOP-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 9 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2/26 DocID016875 Rev 3 TSC1031 1 Application schematic and pin description Application schematic and pin description The TSC1031 high-side current sense amplifier can be used in either single- or dual-supply mode. In the single-supply configuration, the TSC1031 features a wide 2.9 V to 70 V input common-mode range totally independent of the supply voltage. In the dual-supply range, the common-mode range is shifted by the value of the negative voltage applied on the Vccpin. For instance, with Vcc+ = 5 V and Vcc- = -5 V, then the input common-mode range is -2.1 V to 65 V. Figure 1. Single-supply configuration schematic Vsense Iload Rf1 Common-mode voltage: 2.9 V to 70 V Rf2 Cf 5V Cf Vp Vm Rg1 Rg2 Vcc Sense amplifier Voltage buffer Vcc SEL GPIO ADC K2 TSC1031 Vcc- Out Rg3 A1 Gnd Rf3 Gnd µController AM04523 DocID016875 Rev 3 3/26 26 Application schematic and pin description TSC1031 Figure 2. Dual-supply configuration schematic Vsense Iload Common-mode voltage: -2.1 V to 65 V Rf1 Rf2 Cf 5V Cf Vp Vm Rg1 Rg2 Vcc Sense amplifier Voltage buffer Vcc SEL GPIO ADC K2 TSC1031 Vcc- Out Rg3 Gnd A1 Rf3 Gnd µController -5 V AM04524 4/26 DocID016875 Rev 3 TSC1031 Application schematic and pin description Figure 3. Common-mode versus supply voltage in dual-supply configuration Vicm common-mode voltage operating range Max = 70 V Max = 65 V Max = 60 V min = 2.9 V min = -2.1 V Vcc- = 0 V Vcc- = -5 V Single-supply min = -7.1 V Vcc- = -10 V Dual-supply AM04519 Table 1 describes the function of each pin. Their position is shown in the illustration on the cover page and in Figure 1 on page 3. Table 1. Pin description Symbol Type Function Out Analog output The Out voltage is proportional to the magnitude of the sense voltage Vp-Vm. Gnd Power supply Ground line. Vcc+ Power supply Positive power supply line. Vcc- Power supply Negative power supply line. Vp Analog input Connection for the external sense resistor. The measured current enters the shunt on the Vp side. Vm Analog input Connection for the external sense resistor. The measured current exits the shunt on the Vm side. SEL Digital input Gain-select pin. A1 Analog output Connection to the output resistor. DocID016875 Rev 3 5/26 26 Absolute maximum ratings and operating conditions 2 TSC1031 Absolute maximum ratings and operating conditions Table 2. Absolute maximum ratings Symbol Vid Vin_sense Parameter Input pins differential voltage (Vp-Vm) Sensing pins input voltages (Vp, Vm) (1) (2) Value Unit ±20 V -16 to 75 V Vin_sel Gain selection pin input voltage (SEL) -0.3 to Vcc++0.3 V Vin_A1 A1 pin input voltage(2) -0.3 to Vcc++0.3 V -0.3 to 7 V 0 to 15 V Vcc+ Vcc+-Vcc- Positive supply voltage (2) DC supply voltage (2) Vout DC output pin voltage -0.3 to Vcc++0.3 V Tstg Storage temperature -55 to 150 °C Maximum junction temperature 150 °C TSSOP8 thermal resistance junction to ambient 120 C/W SO-8 thermal resistance junction to ambient 125 °C/W HBM: human body model(3) 2.5 kV 150 V 1.5 kV Tj Rthja ESD MM: machine model (4) (5) CDM: charged device model 1. These voltage values are measured with respect to the Vcc- pin. 2. These voltage values are measured with respect to the Gnd pin. 3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 k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 ). 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 Value Unit 2.7 to 5.5 V Vcc+ = 5.5 V max -8 to 0 V Vcc+ = 3 V max -11 to 0 V Vicm Common-mode voltage range referred to pin Vcc (Tmin to Tmax) 2.9 to 70 V Toper Operational temperature range (Tmin to Tmax) -40 to 125 °C Vcc+ Vcc- 6/26 Parameter DC supply voltage in single-supply configuration from Tmin to Tmax (Vcc- connected to Gnd = 0 V) Negative supply voltage in dual-supply configuration from Tmin to Tmax DocID016875 Rev 3 TSC1031 3 Electrical characteristics Electrical characteristics The electrical characteristics given in the following tables are measured under the following test conditions unless otherwise specified.  Tamb = 25° C, Vcc+ = 5 V, Vcc- connected to Gnd (single-supply configuration).  Vsense = Vp-Vm = 50 mV, Vm = 12 V, no load on Out, all gain configurations.  Rf1, Rf2 and Rf3 resistors are short-circuited. Table 4. Supply Symbol Parameter Test conditions Min. Typ. Max. Unit ICC Total supply current Vsense = 0 V, Tmin < Tamb < Tmax 200 360 μA ICC1 Total supply current Vsense = 50 mV Av = 50 V/V Tmin < Tamb < Tmax 300 480 μA Max. Unit Table 5. Input Symbol Parameter DC common-mode rejection DC CMR Variation of Vout versus Vicm referred to input(1) Test conditions Min. Typ. 2.9 V< Vm < 70 V, Tmin < Tamb < Tmax 90 105 dB 95 dB 100 dB AC common-mode rejection Variation of Vout versus Vicm Av = 50 V/V or 100 V/V AC CMR referred to input (peak-to-peak 2.9 V< Vicm < 30 V, 1 kHz sine wave voltage variation) SVR Supply voltage rejection Av = 50 V/V, 2.7 V< VCC < 5.5 V Variation of Vout versus VCC(2) Vsense = 30 mV, Tmin < Tamb < Tmax Vos Input offset voltage(3) Tamb = 25C Tmin < Tamb < Tmax dVos/dT Input offset drift vs. T Av = 50 V/V Tmin < Tamb < Tmax Ilk Input leakage current VCC = 0 V Tmin < Tamb < Tmax Iib Input bias current Vsense = 0 V Tmin < Tamb < Tmax 10 Rg Input resistor value Valid for Rg1 and Rg2 5 VIL Logic low voltage (SEL) VCCmin < VCC < VCCmax Tmin < Tamb < Tmax -0.3 0.5 V VIH Logic high voltage (SEL) VCCmin < VCC < VCCmax Tmin < Tamb < Tmax 1.2 VCC V Isel Gain-select pins (SEL) leakage input current SEL pin connected to GND or VCC Tmin < Tamb < Tmax 85 -20 400 ±500 ±1100 μV +5 μV/°C 1 μA 15 μA k nA 1. See Chapter 5: Parameter definitions on page 13 for the definition of CMR. 2. See Chapter 5 for the definition of SVR. 3. See Chapter 5 for the definition of Vos. DocID016875 Rev 3 7/26 26 Electrical characteristics TSC1031 Table 6. Output Symbol Parameter Test conditions Min. Typ. K1 Sense amplifier gain (K1 = Rg3/Rg1) K2 Current multiplier gain SEL= Gnd SEL= Vcc+ 2.5 5 Av Total gain (Av = 2.K1.K2) SEL= Gnd SEL= Vcc+ 50 100 Output voltage drift vs. T(1) Av = 50 V/V Tmin < Tamb < Tmax Vout/T Vout/Iout Output stage load regulation Max. Unit 10 -10 mA < Iout