Sensor Signal Conditioning IC

www.DataSheet4U.com DRV401 SBVS070A − JUNE 2006 − REVISED OCTOBER 2006 Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensor FEATURES D DESIGNED FOR SENSORS FROM D D D D D D D D D VACUUMSCHMELZE (VAC) SINGLE SUPPLY: 5V POWER OUTPUT: H-Bridge DESIGNED FOR DRIVING INDUCTIVE LOADS EXCELLENT DC PRECISION WIDE SYSTEM BANDWIDTH HIGH-RESOLUTION, LOW-TEMPERATURE DRIFT BUILT-IN DEGAUSS SYSTEM EXTENSIVE FAULT DETECTION EXTERNAL HIGH-POWER DRIVER OPTION DESCRIPTION The DRV401 is designed to control and process signals from specific magnetic current sensors made by Vacuumschmelze GmbH & Co. KG (VAC). A variety of current ranges and mechanical configurations are available. Combined with a VAC sensor, the DRV401 monitors both ac and dc currents to high accuracy. Provided functions include: probe excitation, signal conditioning of the probe signal, signal loop amplifier, an H-bridge driver for the compensation coil, and an analog signal output stage that provides an output voltage proportional to the primary current. It offers overload and fault detection, as well as transient noise suppression. The DRV401 can directly drive the compensation coil, or connect to external power drivers. Therefore, the DRV401 combines with sensors to measure small to very large currents. To maintain the highest accuracy, the DRV401 can demagnetize (degauss) the sensor at power-up and on demand. APPLICATIONS D GENERATOR/ALTERNATOR MONITORING D D D D AND CONTROL FREQUENCY AND VOLTAGE INVERTERS MOTOR DRIVE CONTROLLERS SYSTEM POWER CONSUMPTION PHOTOVOLTAIC SYSTEMS Patents Pending. Compensation PWM Compensation Winding Primary Winding Magnetic Core Field Probe IS2 IP IS1 Probe Interface Integrator Filter H−Bridge Driver PWM ICOMP1 ICOMP2 RS DRV401 Diff Amp VOUT REFIN Timing, Error Detection, and Power Control Degauss VREF VREF +5V GND Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright  2006, Texas Instruments Incorporated www.ti.com DRV401 www.ti.com SBVS070A − JUNE 2006 − REVISED OCTOBER 2006 ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7V Signal Input Terminals: Voltage(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5V to VDD + 0.5V Differential Amplifier(3) . . . . . . . . . . . . . . . . . . . . . . −10V to +10V Current at IS1 and IS2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±75mA Current (pins other than IS1 and IS2)(2) . . . . . . . . . . . . . . ±25mA ICOMP Short Circuit(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +250mA Operating Junction Temperature . . . . . . . . . . . . . −50°C to +150°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . −55°C to +150°C ESD Rating: Human Body Model (HBM) Pins IAIN1 and IAIN2 Only . . . . . . . . . . . . . . . . . . . . . . . . . . . 1kV All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4kV (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported. (2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails must be current limited, except for the differential amplifier input pins. (3) These inputs are not internally protected against over voltage. The differential amplifier input pins must be limited to 5mA, max or ±10V, max. (4) Power-limited; observe maximum junction temperature. This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ORDERING INFORMATION(1) PRODUCT DRV401 PACKAGE-LEAD QFN-20 (5mm x 5mm) PACKAGE PACKAGE DESIGNATOR MARKING RGW HAAQ DRV401 SO-20 DWP DRV401A (1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. 2 DRV401 www.ti.com SBVS070A − JUNE 2006 − REVISED OCTOBER 2006 ELECTRICAL CHARACTERISTICS Boldface limits apply over the specified temperature range: TJ = −40°C to +125°C. At TA = +25°C and VDD1 = VDD2 = +5V with external 100kHz filter BW, and zero output current ICOMP, unless otherwise noted. DRV401 PARAMETER DIFFERENTIAL AMPLIFIER OFFSET VOLTAGE Offset Voltage, RTO(1)(2) Drift, RTO(2) vs Common-Mode, RTO vs Power-Supply, RTO SIGNAL INPUT Common-Mode Voltage Range SIGNAL OUTPUT Signal Over-Range Indication (OVER-RANGE), Delay(2) Voltage Output Swing From Negative Rail(2), OVER-RANGE Trip Level Voltage Output Swing From Positive Rail(2), OVER-RANGE Trip Level Short-Circuit Current(2) ISC Gain, VOUT/VIN_DIFF Gain Error Gain Error Drift Linearity Error FREQUENCY RESPONSE Bandwidth(2) Slew Rate(2) Settling Time, Large-Signal(2) Settling Time(2) INPUT RESISTANCE Differential Common-Mode External Reference Input NOISE Output Voltage Noise Density, f = 1kHz, RTO(2) en Compensation Loop Disabled BW−3dB SR VIN = 1V Step, See Notes 2 and 3 I = +2.5mA, CMP Trip Level I = −2.5mA, CMP Trip Level VOUT Connected To GND VOUT Connected To VDD VDD − 85 VOS dVOS/dT CMRR PSRR CONDITIONS RL = 10kΩ to 2.5V, VREFIN = 2.5V Gain 4V/V −1V to +6V, VREF = 2.5V VREF not included MIN TYP MAX UNITS ±0.01 ±0.1 ±50 ±4 −1 2.5 to 3.5 +48 VDD − 48 −18 +20 4 ±0.02 ±0.1 10 2 6.5 0.9 14 16.5 41 41 20 50 50 170 ±0.1 ±1(3) ±250 ±50 (VDD) + 1 mV µV/°C µV/V µV/V V µs +85 mV mV mA mA V/V % ppm/°C ppm MHz V/µs µs µs ±0.3 RL = 1kΩ CMVR = −1V to = +4V dV ± 2V to 1%, No External Filter dV ± 0.4V to 0.01% 23.5 59 59 kΩ kΩ kΩ nV/√Hz COMPENSATION LOOP DC STABILITY Offset Error(4) Offset Error Drift(2) Gain, Pin Gain = L(2) Power-Supply Rejection Ratio FREQUENCY RESPONSE Open-Loop Gain, Two Modes, 7.8kHz PROBE COIL LOOP Input Voltage Clamp Range Internal Resistor, IS1 or IS2 to VDD1(2) Internal Resistor, IS1 or IS2 to GND1(2) Resistance Mismatch Between IS1 and IS2(2) Total Input Resistance(3) Comparator Threshold Current(3) Minimum Probe Loop Half-Cycle(2) Probe Loop Minimum Frequency No Oscillation Detect (Error) Suppression COMPENSATION COIL DRIVER, H-BRIDGE Peak Current(2) Voltage Swing Output Common-Mode Voltage Wire Break Detect, Threshold Current(5) RHIGH RLOW ppm of RHIGH + RLOW 22 250 250 Probe f = 250kHz, RLOAD = 20Ω Deviation from 50% PWM, Pin Gain = L Deviation from 50% PWM, Pin Gain = L |VICOMP1| − |VICOMP2| Probe Loop f = 250kHz Pin Gain H/L Field Probe Current < 50mA 47 60 0.03 7.5 25 500 24/32 −0.7 to VDD + 0.7 59 75 300 134 28 280 35 VICOMP1 − VICOMP2 = 4.0VPP 20Ω Load ICOMP1 and ICOMP2 Railed 250 4.2 VDD2/2 33 57 71 90 1500 200 34 310 % ppm/°C ppm/V ppm/V dB V Ω Ω ppm W mA ns kHz −200 200 PSRR µs mA VPP V mA 3 DRV401 www.ti.com SBVS070A − JUNE 2006 − REVISED OCTOBER 2006 ELECTRICAL CHARACTERISTICS (continued) Boldface limits apply over the specified temperature range, TJ = −40°C to +125°C, with zero output current ICOMP. At TA = +25°C and VDD1 = VDD2 = +5V with external 100kHz filter BW, unless otherwise noted. DRV401 PARAMETER VOLTAGE REFERENCE Voltage(2) Drift(2) PSRR(2) Load Regulation(2) Short-Circuit Current DEMAGNETIZATION Duration CONDITIONS No Load No Load Load to GND/VDD, dI = 0mA to 5mA REFOUT Connected to VDD REFOUT Connected to GND See Timing Diagram MIN 2.495 TYP 2.5 ±5 ±15 0.15 +20 −18 106 MAX 2.505 ±50 ±200 UNITS V ppm/°C µV/V mV/mA mA mA ms ISC 130(3) DIGITAL I/O LOGIC INPUTS (DEMAG, GAIN, and CCdiag Pins) Pull-Up High Current (CCdiag) Pull-Up Low Current (CCdiag) Logic Input Leakage Current Logic Level, Input: L/H Hysteresis OUTPUTS (ERROR AND OVER-RANGE Pins) Logic Level, Output: L Logic Level, Output: H OUTPUTS (PWM and PWM Pins) Logic Level L Logic Level H CMOS Type Levels 3.5 < VIN < VDD 0 < VIN < 1.5 0 < VIN < VDD 160 5 0.01 2.1/2.8 0.7 0.3 No Internal Pull-Up 0.2 (VDD) − 0.4 µA µA µA V V V 5 4mA Sink Push-Pull Type 4mA Sink 4mA Source V V POWER SUPPLY Specified Voltage Range Power-On Reset Threshold Quiescent Current [I(VDD1) + I(VDD2)] Brownout Voltage Level(2) Brownout Indication Delay TEMPERATURE RANGE Specified Range Operating Range Package Thermal Resistance QFN Surface-Mount SO PowerPAD Surface-Mount (1) (2) (3) (4) (5) (6) VDD VRST IQ 4.5 ICOMP = 0mA, Sensor Not Connected 5 1.8 4 135 5.5 6.8 V V mA V µs °C °C °C/W °C/W TJ TJ qJA qJA See Note 6 See Note 6 −40 −50 40 27 +125 +150 Parameter value referred to output (RTO). See Typical Characteristic curves. Total input resistance and comparator threshold current are inversely related. See Figure 2a. For VAC sensors, 0.2% of PWM offset approximately corresponds to 10mA primary current offset per winding. See Compensation Driver section in Applications Information. See Applications Information section for information on power dissipation, layout considerations, and proper PCB soldering and heat-sinking techniqu