ADM2914-1SRQZEP-R7

Quad UV/OV Positive/Negative Voltage Supervisor ADM2914-EP FEATURES Quad UV/OV positive/negative supervisor Supervises up to 2 negative rails Adjustable UV and OV input thresholds High threshold accuracy over temperature: ±1.5% 1 V buffered reference output Open-drain UV and OV reset outputs Adjustable reset timeout Outputs guaranteed down to VCC of 1 V Glitch immunity 62 μA supply current 16-lead QSOP package FUNCTIONAL BLOCK DIAGRAM VCC TIMER ADM2914-EP VH1 TIMER 500mV VL1 VH2 UV 500mV VL2 OUTPUT LOGIC VH3 ENHANCED PRODUCT FEATURES 500mV Operating temperature range of −55°C to +125°C Server supply monitoring FPGA/DSP core and I/O voltage monitoring Telecommunications equipment Medical equipment OV VL3 MUX VH4 LOGIC 500mV REF VL4 SEL LATCH REF GND 09789-001 APPLICATIONS Figure 1. GENERAL DESCRIPTION The ADM2914-EP is a quad voltage supervisory IC ideally suited for monitoring multiple rails in a wide range of applications. Each monitored rail has two dedicated input pins, VHx and VLx, which allow each rail to be monitored for both overvoltage (OV) and undervoltage (UV) conditions. A common active low undervoltage (UV) and overvoltage (OV) pin is shared by each of the monitored voltage rails. The ADM2914-EP includes a 1 V buffered reference output, REF, that acts as an offset when monitoring a negative voltage. The three-state SEL pin determines the polarity of the third and fourth inputs, that is, it configures the device to monitor positive or negative supplies. The device incorporates an internal shunt regulator that enables the device to be used in higher voltage systems. This feature requires a resistor to be placed between the main supply rail and the VCC pin to limit the current flow into the VCC pin to no greater than 10 mA. The ADM2914-EP uses the internal shunt regulator to regulate VCC if the supply line exceeds the absolute maximum ratings. The ADM2914-EP offers a latching overvoltage output that can be cleared by toggling the LATCH input pin. The ADM2914-EP is available in a 16-lead QSOP package. The device operates over the extended temperature range of −55°C to +125°C. Additional application and technical information can be found in the ADM2914 data sheet. Rev. 0 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 www.analog.com Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. ADM2914-EP TABLE OF CONTENTS Features .............................................................................................. 1  Absolute Maximum Ratings ............................................................4  Enhanced Product Features ............................................................ 1  ESD Caution...................................................................................4  Applications....................................................................................... 1  Pin Configuration and Function Descriptions..............................5  Functional Block Diagram .............................................................. 1  Typical Performance Characteristics ..............................................6  General Description ......................................................................... 1  Outline Dimensions ..........................................................................8  Revision History ............................................................................... 2  Ordering Guide .............................................................................8  Specifications..................................................................................... 3  REVISION HISTORY 6/11—Revision 0: Initial Version Rev. 0 | Page 2 of 8 ADM2914-EP SPECIFICATIONS TA = −55°C to +125°C. Typical values at TA = 25°C, unless otherwise noted. VCC = 3.3 V, VLx = 0.45 V, VHx = 0.55 V, LATCH = VCC, SEL = VCC, unless otherwise noted. Table 1. Parameter SHUNT REGULATOR VCC Shunt Regulator Voltage, VSHUNT VCC Shunt Regulator Load Regulation, ΔVSHUNT SUPPLY Supply Voltage, VCC 1 Minimum VCC Output Valid, VCCR(MIN) Supply Undervoltage Lockout, VCC(UVLO) Supply Undervoltage Lockout Hysteresis, ΔVCC(HYST) Supply Current, ICC REFERENCE OUTPUT Reference Output Voltage, VREF UNDERVOLTAGE/OVERVOLTAGE CHARACTERISTICS Undervoltage/Overvoltage Threshold, VUOT Undervoltage/Overvoltage Threshold to Output Delay, tUOD VHx, VLx Input Current, IVHL UV/OV Timeout Period, tUOTO OV LATCH CLEAR INPUT OV Latch Clear Threshold Input High, VLATCH(IH) Min Typ Max Unit Test Conditions/Comments 6.2 6.2 6.6 6.6 200 6.9 7.0 300 V V mV ICC = 5 mA TA = −55°C to +125°C ICC = 2 mA to 10 mA 2 25 62 VSHUNT 1 2.1 50 100 V V V mV μA VCC rising VCC = 2.3 V to 6 V 0.985 0.985 1 1 1.015 1.020 V V IVREF = ±1 mA TA = −55°C to +125°C 492.5 50 500 125 6 6 8.5 8.5 507.5 500 ±15 ±30 12.5 14 mV μs nA nA ms ms 2.3 1.9 5 1.2 TA = −55°C to +125°C CTIMER = 1 nF TA = −55°C to +125°C V OV Latch Clear Threshold Input Low, VLATCH(IL) 0.8 V LATCH Input Current, ILATCH ±1 μA VLATCH > 0.5 V −2.8 −2.8 2.8 2.8 μA μA μA μA mV VTIMER = 0 V TA = −55°C to +125°C VTIMER = 1.6 V TA = −55°C to +125°C Referenced to VCC V VCC = 2.3 V; IUV/OV = −1 μA TIMER CHARACTERISTICS TIMER Pull-Up Current, ITIMER(UP) TIMER Pull-Down Current, ITIMER(DOWN) TIMER Disable Voltage, VTIMER(DIS) OUTPUT VOLTAGE Output Voltage High, UV/OV, VOH Output Voltage Low, UV/OV, VOL THREE-STATE INPUT SEL Low Level Input Voltage, VIL High Level Input Voltage, VIH Pin Voltage When Left in High-Z State, VZ −1.3 −1.2 1.3 1.2 −180 −2.1 −2.1 2.1 2.1 −270 1 1.4 0.7 0.6 0.1 0.3 V VCC = 2.3 V; IUV/OV = 2.5 mA 0.01 0.15 V VCC = 1 V; IUV = 100 μA 0.4 V V V V μA μA ISEL = ±10 μA TA = −55°C to +125°C 0.9 0.9 SEL High, Low Input Current, ISEL Maximum SEL Input Current, ISEL(MAX) 1 VHx = VUOT − 5 mV or VLx = VUOT + 5 mV 1.1 1.2 ±25 ±30 SEL tied to VCC or GND The maximum voltage on the VCC pin is limited by the input current. The VCC pin has an internal 6.5 V shunt regulator and, therefore, a low impedance supply greater than 6 V may exceed the maximum allowed input current. When operating from a higher supply than 6 V, always use a dropper resistor. Rev. 0 | Page 3 of 8 ADM2914-EP ABSOLUTE MAXIMUM RATINGS Table 3. Thermal Resistance Table 2. Parameter VCC UV, OV TIMER VLx, VHx, LATCH, SEL ICC Reference Load Current (IREF) IUV, IOV Rating −0.3 V to +6 V −0.3 V to +16 V −0.3 V to (VCC + 0.3 V) −0.3 V to +7.5 V 10 mA ±1 mA 10 mA Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering, 10 sec) −65°C to +150°C −55°C to +125°C 300°C Package Type 16-Lead QSOP ESD CAUTION Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. 0 | Page 4 of 8 θJA 104 Unit °C/W ADM2914-EP PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VH1 1 16 VCC VL1 2 15 TIMER VL2 4 VH3 5 ADM2914-EP TOP VIEW (Not to Scale) 14 SEL 13 LATCH 12 UV VL3 6 11 OV VH4 7 10 REF VL4 8 9 GND 09789-002 VH2 3 Figure 2. ADM2914-EP Pin Configuration Table 4. Pin Function Descriptions Pin No. 1 3 2 4 5 7 Mnemonic VH1 VH2 VL1 VL2 VH3 VH4 6 8 VL3 VL4 9 10 GND REF 11 OV 12 UV 13 LATCH 14 SEL 15 TIMER 16 VCC Description Voltage High Input 1 and Voltage High Input 2. If the voltage monitored by VH1 or VH2 drops below 0.5 V, an undervoltage condition is detected. Connect to VCC when not in use. Voltage Low Input 1 and Voltage Low Input 2. If the voltage monitored by VL1 or VL2 rises above 0.5 V, an overvoltage condition is detected. Tie to GND when not in use. Voltage High Input 3 and Voltage High Input 4. The polarity of these inputs is determined by the state of the SEL pin. When the monitored input is configured as a positive voltage and the voltage monitored by VH3 or VH4 drops below 0.5 V, an undervoltage condition is detected. Conversely, when the input is configured as a negative voltage and the input drops below 0.5 V, an overvoltage condition is detected. Connect to VCC when not in use. Voltage Low Input 3 and Voltage Low Input 4. The polarity of these inputs is determined by the state of the SEL pin. When the monitored input is configured as a positive voltage and the voltage monitored by VL3 or VL4 rises above 0.5 V, an overvoltage condition is detected. Conversely, when the input is configured as a negative voltage and the input rises above 0.5 V, an undervoltage condition is detected. Tie to GND when not in use. Device Ground. Buffered Reference Output. This pin is a 1 V reference that is used as an offset when monitoring negative voltages. This pin can source or sink 1 mA and drive loads up to 1 nF. Larger capacitive loads may lead to instability. Leave unconnected when not in use. Overvoltage Reset Output. OV is asserted low if a negative polarity input voltage drops below its associated threshold or if a positive polarity input voltage exceeds its threshold. The ADM2914-EP allows OV to be latched low. This pin has a weak pull-up to VCC and can be pulled up to 16 V externally. Leave this pin unconnected when not in use. Undervoltage Reset Output. UV is asserted low if a negative polarity input voltage exceeds its associated threshold or if a positive polarity input voltage drops below its threshold. UV is held low for an adjustable timeout period set by the external capacitor tied to the TIMER pin. The UV pin has a weak pull-up to VCC and can be pulled up to 16 V externally via an external pull-up resistor. Leave this pin unconnected when not in use. OV Latch Bypass Input/Clear Pin. When pulled high, the OV latch is cleared. When held high, the OV output has the same delay and output characteristics as the UV output. When pulled low, the OV output is latched when asserted. Input Polarity Select. This three-state input pin allows the polarity of VH3, VL3, VH4, and VL4 to be configured. Connect to VCC or GND, or leave open to select one of three possible input polarity configurations. Adjustable Reset Delay Timer. Connect an external capacitor to the TIMER pin to program the reset timeout delay. Refer to Figure 14 in the Typical Performance Characteristics section. Connect this pin to VCC to bypass the timer. Supply Voltage. VCC operates as a direct supply for voltages up to 6 V. For voltages greater than 6 V, it operates as a shunt regulator. A dropper resistor must be used in this configuration to limit the current to less than 10 mA. When used without the resistor, the voltage at this pin must not exceed 6 V. A 0.1 μF bypass capacitor or greater should be used. Rev. 0 | Page 5 of 8 ADM2914-EP TYPICAL PERFORMANCE CHARACTERISTICS 6.80 0.505 6.75 0.503 6.70 0.502 6.65 0.501 VCC (V) 0.500 0.499 –40°C 6.60 6.55 0.498 6.50 0.497 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 6.40 09789-003 0 2 10 1.020 85 1.015 REFERENCE VOLTAGE, VREF (V) VCC = 6V 80 75 ICC (µA) 8 Figure 6. VCC Shunt Voltage vs. ICC 90 VCC = 3.3V 70 65 VCC = 2.3V 60 1.010 1.005 1.000 0.995 0.990 0.985 55 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 0.980 –40 09789-004 –25 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 Figure 7. Buffered Reference Voltage vs. Temperature Figure 4. Supply Current vs. Temperature 1000 6.80 200µA 1mA 2mA 5mA 10mA 6.70 RESET ASSERTED ABOVE THE LINE 900 800 TRANSIENT DURATION (µs) 6.75 6.65 6.60 6.55 6.50 6.45 700 VCC = 6V 600 500 400 VCC = 2.3V 300 200 100 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 0 0.1 09789-005 6.40 –40 6 ICC (mA) Figure 3. Input Threshold Voltage vs. Temperature 50 –40 4 09789-007 0.495 –40 09789-006 6.45 0.496 VCC (V) +25°C +85°C 1 10 COMPARATOR OVERDRIVE (% OF VTH) Figure 8. Transient Duration vs. Comparator Overdrive Figure 5. VCC Shunt Voltage vs. Temperature Rev. 0 | Page 6 of 8 100 09789-008 THRESHOLD VOLTAGE, VUOT (V) 0.504 3.0 13 2.5 PULL-DOWN CURRENT IUV (mA) 14 12 11 10 9 VHx = 0.45V SEL = VCC 2.0 1.5 1.0 UV = 50mV 0.5 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 –0.5 0 0.9 1000 0.8 900 0.7 5 6 800 WITH 10kΩ PULL-UP +85°C 700 UV/OV, VOL (mV) 0.6 0.5 0.4 0.3 0.2 600 +25°C 500 400 – 40°C 300 0.1 200 WITHOUT PULL-UP 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 SUPPLY VOLTAGE, VCC (V) 0.8 0.9 1.0 0 09789-010 0 0 5 10 15 ISINK (mA) Figure 10. UV Output Voltage vs. VCC 09789-013 100 Figure 13. UV/OV Voltage Output Low vs. Output Sink Current 5.0 10k 4.5 UV/OV TIMEOUT PERIOD, tUOTO (ms) VHx = 0.55V SEL = VCC 4.0 3.5 3.0 2.5 2.0 1.5 1.0 1k 100 10 0.5 0 1 2 3 SUPPLY VOLTAGE, VCC (V) 4 5 1 0.1 09789-011 0 Figure 11. UV Output Voltage vs. VCC 1 10 100 TIMER PIN CAPACITANCE CTIMER (nF) Figure 14. UV/OV Timeout Period vs. Capacitance Rev. 0 | Page 7 of 8 1000 09789-014 UV VOLTAGE (V) 2 3 4 SUPPLY VOLTAGE, VCC (V) Figure 12. ISINK, IUV vs. VCC Figure 9. UV/OV Timeout Period vs. Temperature UV VOLTAGE (V) 1 09789-012 7 –40 –0.1 UV = 150mV 0 8 09789-009 UV/OV TIMEOUT PERIOD, tUOTO (ms) ADM2914-EP ADM2914-EP OUTLINE DIMENSIONS 0.197 (5.00) 0.193 (4.90) 0.189 (4.80) 9 1 8 0.244 (6.20) 0.236 (5.99) 0.228 (5.79) 0.010 (0.25) 0.006 (0.15) 0.069 (1.75) 0.053 (1.35) 0.065 (1.65) 0.049 (1.25) 0.010 (0.25) 0.004 (0.10) COPLANARITY 0.004 (0.10) 0.158 (4.01) 0.154 (3.91) 0.150 (3.81) 0.025 (0.64) BSC SEATING PLANE 0.012 (0.30) 0.008 (0.20) 8° 0° 0.050 (1.27) 0.016 (0.41) 0.020 (0.51) 0.010 (0.25) 0.041 (1.04) REF COMPLIANT TO JEDEC STANDARDS MO-137-AB CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. 01-28-2008-A 16 Figure 15. 16-Lead Shrink Small Outline Package [QSOP] (RQ-16) Dimensions shown in inches and (millimeters) ORDERING GUIDE Model 1 ADM2914-1SRQZEP ADM2914-1SRQZEP-R7 1 Temperature Range −55°C to +125°C −55°C to +125°C Package Description 16-Lead Shrink Small Outline Package [QSOP] 16-Lead Shrink Small Outline Package [QSOP] Z = RoHS Compliant Part. ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09789-0-6/11(0) Rev. 0 | Page 8 of 8 Package Option RQ-16 RQ-16