High Voltage, Bidirectional Current Shunt ... - …

1 LOADAD8210 VOUTG = +20 VSUPPLYISRS+IN INVSV+VREF1 VREF2 GND05147-001AD8210 Data Sheet Rev. F | Page 2 of 16 TABLE OF CONTENTS Features .. 1 Applications .. 1 Functional Block Diagram .. 1 General Description .. 1 Revision History .. 2 Specifications .. 3 Absolute Maximum Ratings .. 4 ESD 4 Pin Configuration and Function Descriptions .. 5 Typical Performance Characteristics .. 6 Theory of Operation .. 10 Modes of Operation .. 11 Unidirectional Operation .. 11 Bidirectional Operation .. 11 Input Filtering .. 13 Applications Information .. 14 High-Side Current Sense with a Low-Side Switch .. 14 High-Side Current Sense with a High-Side Switch .. 14 H-Bridge Motor Control .. 14 Outline Dimensions .. 15 Ordering Guide .. 15 Automotive Products .. 15 REVISION HISTORY 5/2020 Rev. E to Rev. F Change to Table 2.

2 4 Deleted Figure 3, Renumbered Sequentially .. 5 Changes to Table 3 .. 5 Changes to Figure 7 and Figure 8 .. 6 Changes to Figure 9 to Figure 14 .. 7 Changes to Figure 15 .. 8 Added Figure 16 and Figure 17 .. 8 9/2017 Rev. D to Rev. E Change to Ordering 15 6/2013 Rev. C to Rev. D Added Automotive Information (Throughout) .. 1 Changes to Equation 1 .. 13 Added Automotive Products Section .. 15 2/2012 Rev. B to Rev. C Changes to Ordering Guide .. 15 5/2009 Rev. A to Rev. B Changes to Ordering Guide .. 15 4/2007 Rev. 0 to Rev. A Changes to Features .. 1 Changes to Input Section .. 3 Updated Outline Dimensions .. 15 4/2006 Revision 0: Initial Version 05147-003 IN1 GND2 VREF23NC4+IN8 VREF17V+6 OUT5NC= NO CONNECTAD8210 TOP VIEW(Not to Scale)200 200 40 TEMPERATURE ( C)VOSI ( V)180160140120100806040200 20 40 60 80 100 120 140 160 180 30 20 10010203040506070809010011012005147-0301 4060100100kFREQUENCY (Hz)CMRR (dB)1k10k130120110100908070+25 C 40 C+125 C05147-03214060100100kFREQUENCY (Hz)CMRR (dB)1k10k130120110100908070+25 C 40 C+125 C05147-0312000 2000 40 TEMPERATURE ( C)GAIN ERROR (ppm) 30 20 1001020304050607080901001101201600120080 04000 400 800 1200 160005147-03330 501010 MFREQUENCY (Hz)GAIN (dB)1001k10k100k1M2520151050 5 10 15 20 25 30 35 40 4505147-014400ns/DIV05147-017 INPUT (100mV/DIV)OUTPUT (500mV/DIV)400ns/DIV05147-018 INPUT (100mV/DIV)OUTPUT (500mV/DIV)1 s/DIVOUTPUT (2V/DIV)INPUT (200mV/DIV)05147-016 INPUT (200mV/DIV)

3 OUTPUT (2V/DIV)1 s/DIV05147-0154 s/DIVOUTPUT (4V/DIV)05147-024 OUTPUT ERROR ( )4 s/DIV05147-025 OUTPUT (4V/DIV)OUTPUT ERROR ( )200ns/DIVINPUT (50V/DIV)OUTPUT (200mV/DIV)05147-019200ns/DIVOUTPUT (200mV/DIV)INPUT (50V/DIV)05147-0200100200300400500600700 60150240330420510600690 COMMON-MODE STEP RECOVERY ERROR (mV)RISE TIME (ns)05147-117010020030040050060070080060 150240330420510600690 COMMON-MODE STEP RECOVERY ERROR (mV)FALLTI ME(ns)05147-11880 40 TEMPERATURE ( C)MAXIMUM OUTPUT SINK Current (mA)7654321 2002040608010012014005147-022 40 TEMPERATURE ( C)MAXIMUM OUTPUT SOURCE Current (mA)11910876543210 SOURCECURRENT (mA)OUTPUT VOLTAGE RANGE (V) SINK Current (mA)OUTPUT VOLTAGE RANGE FROM GND (V) 265 COMMON-MODE VOLTAGE (V)SUPPLY Current (mA) 1010 VOSDRIFT( V/ C)COUNT180015001200900600300 9 6 3036905147-0340020 GAIN DRIFT (ppm/ C)COUNT350030002500200015001000500369121 51805147-0350 (mV)COUNT4000300020001000 +25 C 40 C+125 C05147-0360 (mV)COUNT4000350030002500200015001000500 +25 C 40 C+125 C05147-037 ISHUNTRSHUNTAD8210 VOUT= (ISHUNT RSHUNT) 20A2R1R2 VSVREF1 VREF2 GND05147-004A1R3R4Q1Q2 Data Sheet AD8210 Rev.

4 F | Page 11 of 16 MODES OF OPERATION The AD8210 can be adjusted for unidirectional or Bidirectional operation. UNIDIRECTIONAL OPERATION Unidirectional operation allows the AD8210 to measure currents through a resistive Shunt in one direction. The basic modes for unidirectional operation are ground referenced output mode and V+ referenced output mode. In unidirectional operation, the output can be set at the negative rail (near ground) or at the positive rail (near V+) when the differential input is 0 V. The output moves to the opposite rail when a correct polarity differential input voltage is applied. In this case, full scale is approximately 250 mV. The required polarity of the differential input depends on the output voltage setting. If the output is set at ground, the polarity needs to be positive to move the output up (see Table 5).

5 If the output is set at the positive rail, the input polarity needs to be negative to move the output down (see Table 6). Ground Referenced Output When using the AD8210 in this mode, both reference inputs are tied to ground, which causes the output to sit at the negative rail when the differential input voltage is zero (see Figure 28 and Table 4). AD8210 OUTPUTG=+20RS+IN F Figure 28. Ground Referenced Output Table 4. V+ = 5 V VIN (Referred to IN) VO 0 V V 250 mV V V+ Referenced Output This mode is set when both reference pins are tied to the positive supply. It is typically used when the diagnostic scheme requires detection of the amplifier and wiring before power is applied to the load (see Figure 29 and Table 5). AD8210 OUTPUTG=+20RS+IN F05147-006 Figure 29. V+ Referenced Output Table 5.

6 V+ = 5 V VIN (Referred to IN) VO 0 V V 250 mV V Bidirectional OPERATION Bidirectional operation allows the AD8210 to measure currents through a resistive Shunt in two directions. The output offset can be set anywhere within the output range. Typically, it is set at half scale for equal measurement range in both directions. In some cases, however, it is set at a voltage other than half scale when the Bidirectional Current is nonsymmetrical. Table 6. V+ = 5 V, VO = V with VIN = 0 V VIN (Referred to IN) VO +125 mV V 125 mV V Adjusting the output can also be accomplished by applying voltage(s) to the reference inputs. AD8210 OUTPUTG = +20RS+IN F0V VREF VSAD8210 OUTPUTG = +20RS+IN FVREF0V VREF FAD8210 OUTPUTG = +20RS+IN INVSVREF1 VREF2 GND05147-009 = =AD8210 OUTPUTG = +20 RSHUNT< RFI LTERCFI LTERRFI LTER 10 RFI LTER 10 +IN F0V VREF VS05147-010 INDUCTI VELOADCLAMPDIODEBATTERYSHUNTSWITCHNC= NO CONNECT5V+INVREF1+VSOUT F05147-011 INDUCTI VELOADCLAMPDIODEBATTERYSHUNTSWITCHNC= NO CONNECT5V+INVREF1+VSOUT NO CONNECTMOTOR5V+INVREF1+VSOUT FCONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FORREFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN TO JEDEC STANDARDS ( ) ( ) ( ) ( ) ( ) ( )45 8 0 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )