AD8210 (Rev. F) - Analog Devices

1 VSUPPLY. IS. RS. +IN IN V+. VS. AD8210 . LOAD. VREF 1. G = +20 VOUT. VREF 2. GND. 05147-001. AD8210 Data Sheet TABLE OF CONTENTS. Features .. 1 Unidirectional Operation .. 11. Applications .. 1 Bidirectional Operation .. 11. Functional Block Diagram .. 1 Input Filtering .. 13. General Description .. 1 Applications Information .. 14. Revision History .. 2 High-Side Current Sense with a Low-Side Switch .. 14. Specifications .. 3 High-Side Current Sense with a High-Side Switch .. 14. Absolute Maximum Ratings .. 4 H-Bridge Motor Control .. 14. ESD 4 Outline Dimensions .. 15. Pin Configuration and Function Descriptions .. 5 Ordering Guide .. 15. Typical Performance Characteristics .. 6 Automotive Products.

2 15. Theory of Operation .. 10. Modes of Operation .. 11. REVISION HISTORY 2/2012 Rev. B to Rev. C. 5/2020 Rev. E to Rev. F Changes to Ordering Guide .. 15. Change to Table 2 .. 4. Deleted Figure 3, Renumbered Sequentially .. 5 5/2009 Rev. A to Rev. B. Changes to Table 3 .. 5 Changes to Ordering Guide .. 15. Changes to Figure 7 and Figure 8 .. 6. Changes to Figure 9 to Figure 14 .. 7 4/2007 Rev. 0 to Rev. A. Changes to Figure 15 .. 8 Changes to Features ..1. Added Figure 16 and Figure 17 .. 8 Changes to Input Section ..3. Updated Outline Dimensions .. 15. 9/2017 Rev. D to Rev. E. Change to Ordering 15 4/2006 Revision 0: Initial Version 6/2013 Rev. C to Rev. D. Added Automotive Information (Throughout).

3 1. Changes to Equation 1 .. 13. Added Automotive Products Section .. 15. Rev. F | Page 2 of 16. IN 1 8 +IN. GND 2 AD8210 7 VREF1. VREF2 3 TOP VIEW 6 V+. NC 4 (Not to Scale) 5 OUT. 05147-003. NC = NO CONNECT. 200 2000. 180. 160 1600. 140. 120 1200. 100. 80 800. GAIN ERROR (ppm). 60. 40 400. VOSI ( V). 20. 0 0. 20. 40 400. 60. 80 800. 100. 120 1200. 140. 160 1600. 180. 200 2000. 40 20. 05147-033. 40 20. 05147-030. 0 20 40 60 80 100 120 0 20 40 60 80 100 120. 30 10 10 30 50 70 90 110 30 10 10 30 50 70 90 110. TEMPERATURE ( C) TEMPERATURE ( C). 140 30. 25. 130 20. 15. 120 10. 5. 110 0. CMRR (dB). +125 C +25 C. GAIN (dB). 5. 100 10. 15. 90 20. 40 C 25. 80 30. 35. 70 40. 45. 60 50. 05147-032. 05147-014.

4 100 1k 10k 100k 10 100 1k 10k 100k 1M 10M. FREQUENCY (Hz) FREQUENCY (Hz). 140. INPUT (100mV/DIV). 130. +25 C. 120. OUTPUT (500mV/DIV). 110. 40 C. CMRR (dB). +125 C. 100. 90. 80. 70. 05147-017. 60. 05147-031. 100 1k 10k 100k 400ns/DIV. FREQUENCY (Hz). INPUT (100mV/DIV) OUTPUT (4V/DIV). OUTPUT ERROR ( ). OUTPUT (500mV/DIV). 05147-018. 05147-024. 400ns/DIV 4 s/DIV. INPUT (200mV/DIV) OUTPUT (4V/DIV). OUTPUT ERROR ( ). OUTPUT (2V/DIV). 05147-016. 05147-025. 1 s/DIV 4 s/DIV. INPUT (200mV/DIV). INPUT (50V/DIV). OUTPUT (200mV/DIV). OUTPUT (2V/DIV). 05147-015. 05147-019. 1 s/DIV 200ns/DIV. 8. MAXIMUM OUTPUT SINK CURRENT (mA). 7. INPUT (50V/DIV). 6. 5. OUTPUT (200mV/DIV). 4. 3. 2. 1. 05147-020. 0. 05147-022.

5 200ns/DIV 40 20 0 20 40 60 80 100 120 140. TEMPERATURE ( C). 700 11. COMMON-MODE STEP RECOVERY ERROR (mV). MAXIMUM OUTPUT SOURCE CURRENT (mA). 10. 600. 9. 8. 500. 7. 400 6. 5. 300. 4. 200 3. 2. 100. 1. 0 0. 05147-117. 05147-026. 40 20 0 20 40 60 80 100 120 140. 60 150 240 330 420 510 600 690. RISE TIME (ns) TEMPERATURE ( C). 800 COMMON-MODE STEP RECOVERY ERROR (mV). 700 OUTPUT VOLTAGE RANGE (V). 600 500. 400. 300. 200 100 0 05147-023. 05147-118. 60 150 240 330 420 510 600 690 0 FALL TIME (ns) OUTPUT SOURCE CURRENT (mA). 3500. OUTPUT VOLTAGE RANGE FROM GND (V). 3000. 2500. COUNT. 2000. 1500. 1000. 500. 0 0. 05147-035. 05147-038. 0 1 2 3 4 5 6 7 8 9 0 3 6 9 12 15 18 20. OUTPUT SINK CURRENT (mA) GAIN DRIFT (ppm/ C).

6 +125 C. +25 C. 4000. 40 C. SUPPLY CURRENT (mA). 3000. COUNT. 2000. 1000. 0. 05147-036. 05147-027. 2 0 2 4 6 8 65 0 COMMON-MODE VOLTAGE (V) VOS (mV). 2100. 4000 +125 C. +25 C. 1800. 3500 40 C. 1500 3000. 1200 2500. COUNT. COUNT. 2000. 900. 1500. 600. 1000. 300. 500. 0 0. 10 9 6 3 05147-037. 05147-034. 0 3 6 9 10 0 VOS DRIFT ( V/ C) VOS (mV). ISHUNT. RSHUNT. R1 R2. VS. AD8210 . A1. VREF 1. Q1 Q2. VOUT = (ISHUNT RSHUNT ) 20. A2. R3 R4. VREF 2. GND. 05147-004. Data Sheet AD8210 . MODES OF OPERATION. The AD8210 can be adjusted for unidirectional or bidirectional V+ Referenced Output operation. This mode is set when both reference pins are tied to the UNIDIRECTIONAL OPERATION positive supply. It is typically used when the diagnostic scheme requires detection of the amplifier and wiring before power is Unidirectional operation allows the AD8210 to measure applied to the load (see Figure 29 and Table 5).

7 Currents through a resistive shunt in one direction. The basic modes for unidirectional operation are ground referenced RS. output mode and V+ referenced output mode. +IN IN. In unidirectional operation, the output can be set at the negative rail (near ground) or at the positive rail (near V+) VS. when the differential input is 0 V. The output moves to the opposite rail when a correct polarity differential input voltage is AD8210 . F. 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 VREF 1. to be positive to move the output up (see Table 5). If the output is set at the positive rail, the input polarity needs to be negative OUTPUT.

8 G = +20. to move the output down (see Table 6). Ground Referenced Output VREF 2. When using the AD8210 in this mode, both reference inputs are tied to ground, which causes the output to sit at the negative GND. rail when the differential input voltage is zero (see Figure 28. 05147-006. and Table 4). RS Figure 29. V+ Referenced Output +IN IN Table 5. V+ = 5 V. VIN (Referred to IN) VO. VS F 0V V. 250 mV V. AD8210 . BIDIRECTIONAL OPERATION. Bidirectional operation allows the AD8210 to measure currents VREF 1. through a resistive shunt in two directions. The output offset can be set anywhere within the output range. Typically, it is set OUTPUT. G = +20 at half scale for equal measurement range in both directions.

9 In some cases, however, it is set at a voltage other than half scale when the bidirectional current is nonsymmetrical. VREF 2. Table 6. V+ = 5 V, VO = V with VIN = 0 V. GND VIN (Referred to IN) VO. +125 mV V. 05147-005. 125 mV V. Figure 28. Ground Referenced Output Adjusting the output can also be accomplished by applying Table 4. V+ = 5 V voltage(s) to the reference inputs. VIN (Referred to IN) VO. 0V V. 250 mV V. Rev. F | Page 11 of 16. RS. +IN IN. VS F. AD8210 . RS. VREF 1. VREF. +IN IN. 0V VREF VS. G = +20. VS F OUTPUT. AD8210 . VREF 2. VREF. 0V VREF VS GND. VREF 1. 05147-008. OUTPUT. G = +20. VREF 2. GND. 05147-007. RS. +IN IN. VS. AD8210 . F. VREF 1. OUTPUT. G = +20. VREF 2. GND. 05147-009.

10 = = .. RSHUNT < RFILTER. RFILTER 10 CFILTER RFILTER 10 . +IN IN. VS F. AD8210 . VREF. 0V VREF VS. VREF 1. OUTPUT. G = +20. VREF 2. GND. 05147-013. 5V. F. SWITCH. BATTERY +IN VREF1 +VS OUT. SHUNT AD8210 . IN GND VREF2 NC. CLAMP. DIODE. INDUCTIVE. LOAD. 05147-011. NC = NO CONNECT. 5V. INDUCTIVE F. CLAMP LOAD. DIODE. BATTERY +IN VREF1 +VS OUT. SHUNT AD8210 . IN GND VREF2 NC. SWITCH. 05147-010. 5V. NC = NO CONNECT. F. CONTROLLER. MOTOR +IN VREF 1 +VS OUT. AD8210 . SHUNT. IN GND VREF2 NC. 5V. 05147-012. NC = NO CONNECT. ( ). ( ). 8 5. ( ) ( ). ( ) 1 ( ). 4. ( ) ( ). BSC 45 . ( ) ( ). ( ) ( ). 8 . ( ) 0 . COPLANARITY ( ). ( ). ( ) ( ). SEATING ( ). PLANE ( ). COMPLIANT TO JEDEC STANDARDS MS-012-AA. CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS.