TSC1031 STMicroelectronics, TSC1031 Datasheet

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... 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 selection pin ...

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... Gain (Av) and input offset voltage (V 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/ Doc ID 16875 Rev 2 TSC1031 ...

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... 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 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 Vcc- pin ...

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... Application schematic and pin description Figure 2. Dual-supply configuration schematic Cf 4/26 Vsense Iload Common-mode voltage: -2 Rf1 Rf2 Cf Vcc Vp Vm Rg2 Rg1 Sense Voltage amplifier K2 TSC1031 Rg3 Vcc- A1 Rf3 Doc ID 16875 Rev Vcc SEL buffer GPIO ADC Out Gnd Gnd µController -5 V AM04524 TSC1031 ...

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... TSC1031 Figure 3. Common-mode versus supply voltage in dual-supply configuration common-mode voltage Table 1 describes the function of each pin. Their position is shown in the illustration on the cover page and in Table 1. Pin description Symbol Out Analog output Gnd Power supply Vcc+ Power supply Vcc- Power supply ...

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... Doc ID 16875 Rev 2 Value ± +0.3 cc+ -0 +0.3 cc +0.3 cc+ -55 to 150 150 120 125 2.5 150 1.5 pin. cc- Value 2 -40 to 125 max TSC1031 Unit °C °C °C/W °C Unit °C ...

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... TSC1031 3 Electrical characteristics The electrical characteristics given in the following tables are measured under the following test conditions unless otherwise specified. ● 25° amb ● sense p ● Rf1, Rf2 and Rf3 resistors are short-circuited. Table 4. Supply Symbol Parameter I Total supply current ...

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... Doc ID 16875 Rev 2 Min. Typ. Max 100 ±240 0.3 ±1.5 ±2.5 ±4 ±3.5 ±5 = 25° C ±3.5 ±5 = 25° C ±5.5 ±8 ±10 ± 135 80 125 = Av*V . See Chapter 5 out-th sense TSC1031 Unit V/V ppm/°C mV/ ...

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... TSC1031 Table 7. Frequency response Symbol Parameter ts Output settling final value t Output settling final value SEL Response to common-mode t voltage change. rec Output settling final value SR Slew rate bandwidth Table 8. Noise Symbol Parameter eN Equivalent input noise voltage Test conditions ...

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... T = 125 °C 150 100 50 4.5 5 5.5 Doc ID 16875 Rev 2 Output voltage accuracy vs. Vsense Guaranteed Typical accuracy vs. T accuracy Guaranteed accuracy @ 25 ° Vsense (mV) Supply current vs. Vsense ° -40 ° 125 °C 0 -100 -50 0 Vsense (mV) TSC1031 80 100 50 100 ...

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... TSC1031 Figure 8. Vp pin input current vs. Vsense -40 ° -100 -50 0 Vsense (mV) Figure 10. Output stage low-state saturation voltage vs. output current (Vsense = -1 V) 1200 Output stage sinking current 1000 800 T = 125 °C 600 400 200 Iout (mA) Figure 12 ...

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... Electrical characteristics curves: current sense amplifier Figure 14. Bode diagram -10 -20 -30 1.E+03 1.E+04 1.E+05 Frequency (Hz) Figure 16. Noise Level 120 100 Frequency (Hz) 12/26 Figure 15. Power supply rejection ratio 1.E+01 1.E+06 1.E+07 Doc ID 16875 Rev 2 TSC1031 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 Frequency (Hz) ...

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... TSC1031 5 Parameter definitions 5.1 Common mode rejection ratio (CMR) The common mode rejection ratio (CMR) measures the ability of the current sensing amplifier to reject any DC voltage applied on both inputs V back to the input so that its effect can be compared with the applied differential signal. The CMR is defined by the formula: 5 ...

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... Test conditions for V Av (V/V) 50 100 14/26 versus V characteristics: detail for low V sense Vout Vout_1 Vout_2 Vos Vsense2 and V used for the input offset calculations are detailed in sense2 voltage calculation os V (mV) sense1 50 40 Doc ID 16875 Rev 2 TSC1031 values sense Vsense Vsense1 AM04520 V (mV) sense2 5 5 ...

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... TSC1031 5.4 Output voltage drift versus temperature The output voltage drift versus temperature is defined as the maximum variation of V respect to its value at 25° C over the temperature range calculated as follows: with T < T min amb Figure 18 provides a graphical definition of the output voltage drift versus temperature. On ...

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... The actual value is very slightly different, mainly due to the effects of: ● the input offset voltage V ● the non-linearity. 16/26 Δ amb -------------- - = max --------------------------------------------------------------------- ΔT T amb 25° C < max 1.5 1 0.5 0 -0.5 -1 -1.5 -2 -2.5 -60 -40 - sense , os Doc ID 16875 Rev 25° – – 100 120 140 T (°C) TSC1031 with os ...

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... TSC1031 Figure 20. Vout vs. Vsense theoretical and actual characteristics The output voltage accuracy, expressed as a percentage, can be calculated with the following formula, with 50 V/V or 100 V/V depending on the configuration of the SEL pin. Vout Actual Vout accuracy for Vsense = ⋅ abs – ...

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... Maximum permissible voltages on pins 6 Maximum permissible voltages on pins The TSC1031 can be used in either single or dual supply configuration. The dual-supply configuration is achieved by disconnecting Vcc- and Gnd, and connecting Vcc negative supply. Figure 21 are referred to the Vcc- potential, while the maximum voltages on the positive supply pin, gain selection pins and output pins are referred to the Gnd pin ...

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... TSC1031 7 Application information The TSC1031 can be used to measure current and to feed back the information to a microcontroller. Figure 22. Typical application Rf1 Vp Rg1 5K TSC1031 The current from the supply flows to the load through the R drop equal to V sense inverting input voltage is equal to V input to the same voltage as the inverting input consequence, the amplifier adjusts ...

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... To balance the contribution of R resistor R should be connected between pin A1 and Gnd. The value chosen according to the following formula these precautions having been taken, the TSC1031’s gain is unaffected by the implementation of the input filtering resistors. 20/26 Figure . f and R should be equal balance the contribution on both ...

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... TSC1031 8 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Doc ID 16875 Rev 2 Package information ® ...

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... Dimensions Millimeters Min. Typ. Max. 1.75 0.10 0.25 1.25 0.28 0.48 0.17 0.23 4.80 4.90 5.00 5.80 6.00 6.20 3.80 3.90 4.00 1.27 0.25 0.50 0.40 1.27 1.04 0 8° 0.10 Doc ID 16875 Rev 2 TSC1031 Inches Min. Typ. Max. 0.069 0.004 0.010 0.049 0.011 0.019 0.007 0.010 0.189 0.193 0.197 0.228 0.236 0.244 0.150 0.154 0.157 0.050 0.010 0.020 0.016 0.050 0.040 1° 8° 0.004 ...

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... TSC1031 8.2 TSSOP-8 package information Figure 24. TSSOP8 package mechanical drawing Table 11. TSSOP8 package mechanical data Ref aaa Dimensions Millimeters Min. Typ. Max. 1.20 0.05 0.15 0.80 1.00 1.05 0.19 0.30 0.09 0.20 2.90 3.00 3.10 6.20 6.40 6.60 4.30 4.40 4.50 0.65 0° 8° 0.45 0.60 0.75 1 0.10 Doc ID 16875 Rev 2 Package information Inches Min. Typ. Max. 0.047 0.002 0.006 ...

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... Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q002 or equivalent. 24/26 Package Packaging TSSOP8 Tape & reel SO-8 Tape & reel (1) TSSOP8 Tape & reel (2) SO-8 Tape & reel Doc ID 16875 Rev 2 TSC1031 Marking 1031I TSC1031I 1031Y TSC1031Y ...

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... TSC1031 10 Revision history Table 13. Document revision history Date 04-Jan-2010 29-Apr-2011 Revision 1 Initial release. Added Chapter 4: Electrical characteristics curves: current sense amplifier. Changed Figure Modified Figure 22: Typical Added automotive grade qualification for SO-8 package in Table 12: Order codes. Doc ID 16875 Rev 2 Revision history ...

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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 26/26 Please Read Carefully: © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 16875 Rev 2 TSC1031 ...