ADM6315-31D3ARTZR7

FEATURES FUNCTIONAL BLOCK DIAGRAM VCC GND VREF ADM6315 RESET RESET CIRCUITRY MR DEBOUNCE 00081-001 Specified over temperature Low power consumption (5 μA typical) Precision voltage monitor of voltages from 2.5 V to 5 V at 100 mV increments Reset assertion down to VCC > 1 V Reset timeout periods: 1 ms, 20 ms, 140 ms, or 1120 ms (minimum) Built-in manual reset Pin compatible with the ADM811 Available in SOT-143 package Figure 1. APPLICATIONS Microprocessor systems Controllers Intelligent instruments Automotive systems Safety systems Portable instruments VCC SYSTEM POWER ADM6315 RESET MR 10kΩ MICROPROCESSOR SYSTEM RESET GND GND 00081-011 Data Sheet Open-Drain Microprocessor Supervisory Circuit in 4-Lead SOT-143 ADM6315 Figure 2. Typical Operating Circuit GENERAL DESCRIPTION The ADM6315 is a reliable voltage monitoring device that is suitable for use in most voltage monitoring applications. The ADM6315 is designed to monitor as little as a 1.8% degradation of a power supply voltage. The ADM6315 can monitor all voltages (at 100 mV increments) from 2.5 V to 5 V. Included in this circuit is a debounced manual reset input. RESET can be activated using an ordinary switch (pulling MR low), a low input from another digital device, or a degradation of the supply voltage. Rev. H The manual reset function is very useful, especially if the circuit in which the ADM6315 is operating enters into a state that can be detected only by the user. Allowing the user to reset a system manually can reduce the damage or danger that could otherwise be caused by an out of control or locked up system. The ADM6315 is available in a cost efficient and space efficient SOT-143 package. Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©1999–2018 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADM6315 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications ....................................................................................... 1 Theory of Operation .........................................................................7 Functional Block Diagram .............................................................. 1 Interfacing to Output of Other Devices .....................................7 General Description ......................................................................... 1 Benefits of an Accurate RESET Threshold ....................................7 Revision History ............................................................................... 2 Detailed Description .....................................................................7 Specifications..................................................................................... 3 Manual Reset Input .......................................................................7 Absolute Maximum Ratings............................................................ 4 Transient Immunity ......................................................................7 Thermal Resistance ...................................................................... 4 Outline Dimensions ..........................................................................8 ESD Caution .................................................................................. 4 Ordering Guide .............................................................................8 Pin Configuration and Function Descriptions ............................. 5 REVISION HISTORY 9/2013—Rev. F to Rev. G Changed Date in Revision F Revision History ............................. 2 Updated Outline Dimensions ......................................................... 8 2/2003—Rev. A to Rev. B Edits to Features.................................................................................1 Edits to Specifications .......................................................................2 Edits to Absolute Maximum Ratings ..............................................3 Edits to Ordering Guide ...................................................................3 Edits to Table I and Table II .............................................................6 Edits to Table III and Table IV .........................................................7 Updated Outline Dimensions ..........................................................8 12/2011—Rev. E to Rev. F Added Automotive Part ..................................................... Universal Changes to Ordering Guide ............................................................ 8 10/2001—Rev. 0 to Rev. A Edits to Table III ................................................................................7 Edits to Table IV ................................................................................7 9/2007—Rev. D to Rev. E Changes to Absolute Maximum Ratings ....................................... 4 Updated Outline Dimensions ......................................................... 8 Changes to Ordering Guide ............................................................ 8 1999—Revision 0: Initial Version 11/2018—Rev. G to Rev. H Change to Features Section ............................................................. 1 Deleted Automotive Products Section ........................................... 8 Changes to Ordering Guide ............................................................ 8 4/2006—Rev. C to Rev. D Updated Format .................................................................. Universal Updated Outline Dimensions ......................................................... 8 Changes to Ordering Guide ............................................................ 8 12/2003—Rev. B to Rev. C Edit to Absolute Maximum Ratings ............................................... 3 Edits to Ordering Guide .................................................................. 4 Deleted Table I and Table II ............................................................ 6 Deleted Table III and Table IV ........................................................ 7 Updated Outline Dimensions ......................................................... 8 Rev. H | Page 2 of 8 Data Sheet ADM6315 SPECIFICATIONS VCC = full operating range, TA = TMIN to TMAX, VCC typical = 5 V, unless otherwise noted. Table 1. Parameter SUPPLY Operating Voltage VCC Supply Current Min Typ 1 Max Unit Test Conditions/Comments 5.5 12 15 10 12 VTH + 1.8% VTH + 2.5% VTH + 3.5% TA = −40°C to +85°C VCC = 5.5 V, no load, TA = −40°C to +85°C VCC = 5.5 V, no load, TA = −40°C to +125°C VCC = 3.6 V, no load, TA = −40°C to +85°C VCC = 3.6 V, no load, TA = −40°C to +125°C TA = 25°C TA = −40°C to +85°C TA = −40°C to +125°C RESET THRESHOLD TEMPERATURE COEFFICIENT 60 V μA μA μA μA V V V ppm/°C VCC TO RESET DELAY RESET ACTIVE TIMEOUT PERIOD ADM6315xxD1 35 μs VCC = falling at 1 mV/μs ms ms ms ms ms ms ms ms TA = −40°C to +85°C TA = −40°C to +125°C TA = −40°C to +85°C TA = −40°C to +125°C TA = −40°C to +85°C TA = −40°C to +125°C TA = −40°C to +85°C TA = −40°C to +125°C VTH > 4 V (VIL) VTH > 4 V (VIH) VTH < 4 V (VIL) VTH < 4 V (VIH) 100 V V V V μs ns ns kΩ 0.4 0.3 0.3 1 V V V μA VCC > 4.25 V, ISINK = 3.2 mA VCC > 2.5 V, ISINK = 1.2 mA VCC > 1 V, ISINK = 80 μA VCC > VTH, RESET deasserted 5 4 RESET VOLTAGE THRESHOLD (VTH) ADM6315xxD2 ADM6315xxD3 ADM6315xxD4 MANUAL RESET Input Threshold VTH − 1.8% VTH − 2.5% VTH − 3.5% 1 0.8 20 16 140 112 1120 896 VTH 1.4 28 200 1570 2 2.4 40 48 280 336 2240 2688 0.8 2.4 0.3 × VCC 0.7 × VCC Minimum Input Pulse Glitch Rejection To Reset Delay Pull-Up Resistance RESET OUTPUT Output Voltage Output Leakage Current 1 32 100 500 63 Rev. H | Page 3 of 8 ADM6315 Data Sheet ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. THERMAL RESISTANCE Table 2. Rating θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. −0.3 V to +6 V −0.3 V to +6 V Package Type 4-Lead SOT-143 Parameter Terminal Voltage (with Respect to Ground) VCC All Other Inputs Input Current VCC Output Current RESET Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec) Vapor Phase (60 sec) Infrared (15 sec) ESD Rating Table 3. Thermal Resistance 20 mA 20 mA −40°C to +125°C −65°C to +160°C 300°C 215°C 220°C 2.5 kV ESD CAUTION Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. H | Page 4 of 8 θJA 330 Unit °C/W Data Sheet ADM6315 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS RESET 2 ADM6315 TOP VIEW (Not to Scale) 4 VCC 3 MR 00081-002 GND 1 Figure 3. Pin Configuration Table 4. Pin Function Descriptions Pin No. 1 2 Mnemonic GND RESET 3 MR 4 VCC Description Ground Reference for All Signals, 0 V. Active Low Logic Output. RESET remains low while VCC is below the reset threshold or when MR is low. RESET then remains low for a minimum of 1 ms, 20 ms, 140 ms, or 1120 ms after VCC rises above the reset threshold and MR is high. Manual Reset. This active low debounced input ignores input pulses of 100 ns (typical) and is guaranteed to accept input pulses of greater than 1 μs. Leave floating when not used. Monitored Supply Voltage. Rev. H | Page 5 of 8 ADM6315 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 50 8 6 VCC = 3V 4 2 –20 0 20 40 60 80 100 125 TEMPERATURE (°C) Figure 4. Supply Current vs. Temperature 25 20 15 10 5 0 0 300 200 300 400 500 600 700 900 800 1000 RESET COMPARATOR OVERDRIVE, (VTH – VCC) (mV) 1.000 250 200 VOD = 20mV 150 VOD = 125mV 50 VOD = 200mV –20 0 20 40 60 80 100 125 TEMPERATURE (°C) Figure 5. Power-Down Reset Delay vs. Temperature 0.990 –40 –20 0 20 40 60 80 100 125 TEMPERATURE (°C) 00081-007 0.995 100 Figure 8. Normalized Reset Threshold vs. Temperature (VCC Falling) 12 1.04 10 SUPPLY CURRENT (µA) 1.06 1.02 1.00 0.98 8 +85°C 6 –40°C +25°C 4 2 –20 0 20 40 60 TEMPERATURE (°C) 80 100 125 00081-005 0.96 0.94 –40 100 NORMALIZED RESET THRESHOLD (V) 350 00081-004 POWER-DOWN RESET DELAY (µs) 30 1.005 400 NORMALIZED RESET TIMEOUT PERIOD (ms) 35 Figure 7. Maximum Transient Duration vs. RESET Comparator Overdrive 450 0 –40 40 Figure 6. Normalized Reset Timeout Period vs. Temperature (VCC Rising) Rev. H | Page 6 of 8 0 0 1 2 3 4 SUPPLY VOLTAGE (V) Figure 9. Supply Current vs. Supply Voltage 5 00081-008 0 –40 VCC = 1V 00081-003 IDD (µA) VCC = 5.5V 45 00081-012 MAXIMUM TRANSIENT DURATION (µs) 10 Data Sheet ADM6315 THEORY OF OPERATION INTERFACING TO OUTPUT OF OTHER DEVICES MANUAL RESET INPUT The ADM6315 series is designed to integrate with as many devices as possible. One feature of the ADM6315 is the RESET open-drain output, which can sink current from sources with a voltage greater than the VCC of the ADM6315 input, making it suitable for use in more diverse applications. The ADM6315 also provides an additional input, MR. This input can be used either as a means for the system operator to reset the system manually via a switch or for a digital circuit to reset the system. BENEFITS OF AN ACCURATE RESET THRESHOLD Because the ADM6315 series can operate effectively even when there are large degradations of the supply voltages (due to an accurate internal voltage reference circuit), the possibility of a malfunction during a power failure is greatly reduced. The MR input (typically) ignores negative-going pulses that are faster than 100 ns, and it is guaranteed to accept any negativegoing input pulse of a duration greater than or equal to 1 μs. If MR is connected to long cables or is used in a noisy environment, placing a 1 μF decoupling capacitor between the MR input and ground further improves the glitch immunity of the ADM6315. VCC VCC TRIP POINT (MIN) VCC TRIP POINT (MIN) VCC TO RESET DELAY VCC VOL RESET ACTIVE TIMEOUT 00081-009 RESET VCC TRIP POINT (MAX) VCC TRIP POINT RESET Figure 10. VCC Power-Down/Brownout Timing Diagram 00081-010 VCC TRIP POINT (MAX) VCC TRIP POINT Figure 11. VCC Power-Up Timing Diagram DETAILED DESCRIPTION The ADM6315 is designed to protect the integrity of a system’s operation by ensuring the proper operation of the system during power-up, power-down, and brownout conditions. When the ADM6315 is powered up, the RESET output of the ADM6315 remains low for a period typically equal to the RESET active timeout period. This feature allows adequate time for the system to power up correctly and for the power supply to stabilize before any devices are brought out of reset and allowed to begin executing instructions. Initializing a system in this way provides a more reliable startup for microprocessor systems. TRANSIENT IMMUNITY As well as being an accurate reset circuit, the ADM6315 has good immunity from negative-going transients (see Figure 7). Because of this characteristic, the ADM6315 is suitable for use in noisy environments. Figure 7 shows the RESET comparator overdrive (the maximum magnitude of negative-going pulses with respect to the typical reset threshold) vs. the pulse duration without a reset. When a brownout condition occurs (assuming VCC is falling at 1 mV/μs), the ADM6315 produces a reset in 35 μs typical. Producing a reset this fast means that the entire system can be reset together before any part of the system’s voltage falls below its recommended operating voltage. This system reset can avoid dangerous and/or erroneous operation of a microprocessorbased system. Rev. H | Page 7 of 8 ADM6315 Data Sheet OUTLINE DIMENSIONS 3.04 2.90 2.80 1.92 BSC 0.20 BSC 4 1.40 1.30 1.20 3 1 2.64 2.10 2 1.72 REF 1.07 0.90 0.75 0.100 0.013 0.89 0.76 0.50 0.30 0.20 0.08 SEATING PLANE 8° 0° 0.54 REF 0.60 0.50 0.40 03-13-2012-B 1.22 0.80 COMPLIANT TO JEDEC STANDARDS TO-253-AA Figure 12. 4-Lead Small Outline Transistor Package [SOT-143] (RA-4) Dimensions shown in millimeters ORDERING GUIDE Model1 ADM6315-44D1ARTRL7 ADM6315-31D1ARTZR7 ADM6315-29D1ARTZR7 ADM6315-26D1ARTZR7 ADM6315-45D2ARTZR7 ADM6315-31D2ARTZR7 ADM6315-29D2ARTZR7 ADM6315-26D2ARTZR7 ADM6315-46D3ARTZR7 ADM6315-44D3ARTZR7 ADM6315-31D3ARTZR7 ADM6315-29D3ARTRL7 ADM6315-26D3ARTZR7 ADM6315-46D4ARTZR7 ADM6315-44D4ARTZR7 ADM6315-31D4ARTZR7 ADM6315-29D4ARTZR7 ADM6315-26D4ARTZR7 1 Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C –40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C Package Description 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 4-Lead SOT-143 Package Option RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 RA-4 Z = RoHS-Compliant Part, # denotes lead-free product may be top or bottom marked. ©1999–2018 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00081-0-11/18(H) Rev. H | Page 8 of 8 Trip Point 4.39 3.08 2.93 2.63 4.50 3.08 2.93 2.63 4.63 4.39 3.08 2.93 2.63 4.63 4.39 3.08 2.93 2.63 Minimum Timeout (ms) 1 1 1 1 20 20 20 20 140 140 140 140 140 1120 1120 1120 1120 1120 Marking Code MDT M7X M7T MDB# MA8 M7Y M7U MEB# M84 MFT# M4G MFC MFB# M85 M9H M7Z M7W MGB#