LMV7231EVAL/NOPB

8 October 2010 980600403 – LMV7231 Evaluation Board User Guide This evaluation board contains the LMV7231 Hex Window Comparator and allows for evaluation of the device. Connectors, Jumpers, Test Points Power Supply There are two test points labeled V+, and GND to power the evaluation board. A single supply per the LMV7231 Datasheet Operating Ratings can be used. Signal Connectors There are three connectors for signals. J1 is a 2x7 100mil Header for the monitored voltage signals. J2 is a 2x14 100mil Header for the input signals. J3 is a 2x7 100mil Header for the output signals. Jumpers The demo board has 3 jumpers. J4 connects the AOSEL pin of the LMV7231 to either VPU or GND. Default AOSEL connected to GND. J5 connects the COPOL pin of the LMV7231 to either VPU or GND. Default COPOL connected to GND. A 3rd jumper can be used at J1 to connect V+ to VPU. Default V+ connected to VPU. Using the board Power Supply Setup Connect a single supply per the Datasheet Operating Ratings to the V+ and GND test points. Monitored Voltage Signals The monitored voltage signals (VIN1, VIN2, VIN3, VIN4, VIN5, VIN6) are connected to the board using jumper J1. Input Signals, AOSEL, and COPOL Access directly to the LMV7231 window comparator inputs (+IN1, -IN1, +IN2, IN2, etc.) and AOSEL and COPOL are available at jumper J2. 1 8 October 2010 Output Signals The comparator output signals (CO1, CO2, CO3, CO4, CO5, CO6, AO) are taken from jumper J3. 3 Resistor Voltage Divider No 3 resistor voltage divider (R7, R8, R9) is populated on Channel 1 to allow customer the flexibility to select resistors in order set their own voltage detection window. See the 3 RESISTOR VOLTAGE DIVIDER SELECTION section of the LMV7231 datasheet for proper resistor selection. Remaining channels have their 3 resistor voltage dividers populated to detect the windows in the table below and are optimized for a signal rising into and out of the voltage detection window. Table 1. Voltage Detection Windows Channel 1 2 3 4 5 6 Window Open 3.3V +/-5% 2.5V +/- 5% 1.8V +/- 5% 1.2V +/- 5% 1.0V +/- 5% Min NA 3.135V 2.375V 1.71V 1.14V 0.95V Max NA 3.465V 2.625V 1.89V 1.26V 1.05V Output Pull-up Resistors and Capacitive Loads Output pull-up resistors (R19, R20, R21, R22, R23, R24, R25) and capacitive load (C2, C3, C4, C5, C6, C7, C8) can be adjusted to meet customer evaluation requirements. By default pull-up resistors are 10 kΩ and capacitive load is unpopulated. VPU VPU is the output pull-up resistor voltage and can be pulled up to any voltage within the Abs Max ratings of the LMV7231. By default VPU is set to V+ with a jumper at J1. AOSEL The state of AOSEL pin determines whether the AO pin is active on an overvoltage or under-voltage event. When tied LOW the AO output will be active upon an over-voltage event. By default AOSEL is set LOW with jumper J4 shorting AOSEL to GND. COPOL The state of the COPOL pin determines whether the CO1-CO6 pins are active “HIGH” or “LOW”. When tied LOW the CO1-CO6 outputs will go LOW to indicate an out of window comparison. By default COPOL is set LOW with jumper J5 shorting COPOL to GND. 2 8 October 2010 AO and Optional AO LED The AO output is the ANDED combination of either the overvoltage comparator outputs or the under-voltage comparator outputs and is controlled by the state of the AOSEL. AO pin is active “LOW”. Footprint for an optional AO LED, D1, and current limiting resistor, R26, have been included on the board to allow a user to visually indicate an out of window event. See BOM for recommended components. 3 8 October 2010 Board Layout, Schematic, and BOM Figure 1. Top of Evaluation Board 4 8 October 2010 Figure 2. Bottom of Evaluation Board 5 8 October 2010 Figure 3. Schematic 6 8 October 2010 Table 2. BOM Item Designator Description Manufacturer Manufacturer P/N Quantity 1 2 10uF Tantalum EIA-D DNS Vishay/Sprague 293D106X0025C2TE3 1 0 4 5 6 7 8 9 10 11 12 C1 C2, C3, C4, C5, C6, C7, C8 C11, C12, C13, C14, C15, C16 C9 C10, C17, C18 J1, J3 J2 J4, J5 R1 R4 R7, R8, R9 R10 0.1uF 0805 DNS Header, 100mil, 2x7, Tin Header, 100mil, 2x14, Tin Header, TH, 100mil, 1x3, Tin 52.3 kohm Resistor, SMT, 0.1% 0805 71.5 kohm Resistor, SMT, 0.1% 0805 DNS 14.3 kohm Resistor, SMT, 0.1% 0805 13 14 R13 R16 15 R2, R5, R11, R14, R17 R3, R6, R12, R15, R18 R19, R20, R21, R22, R23, R24, R25 3 16 17 DNS 0 Kemet C0805C104J5RACTU 1 0 Sullins PEC36DACN 1 Sullins MULTICOMP MULTICOMP PEC36SAAN MCTC0525B5232T5E MCTC0525B7152T5E Susumu RG2012P-1432-B-T5 1 1 1 0 1 19.6 kohm Resistor, SMT, 0.1% 0805 34.8 kohm Resistor, SMT, 0.1% 0805 MULTICOMP Susumu MCTC0525B1962T5E RG2012P-3482-B-T5 1 1 1.0 kohm Resistor, SMT, 0.1% 0805 Susumu RG2012P-102-B-T5 5 9.53 kohm Resistor, SMT, 0.1% 0805 Susumu RG2012P-9531-B-T5 5 10 kohm Resistor, SMT, 0805 Vishay/Dale CRCW080510k0FKEA 7 18 R26 DNS [1.0 kohm Resistor, SMT, 0.1% 0805] Susumu RG2012P-102-B-T5 0 19 20 21 22 TP1, TP2 D1 U1 Shunts TERMINAL TURRET DBL .084"L DNS [LED Domed Green Clear 1210 SMD] LMV7231 Hex Window Comparator CONN SHUNT CLOSED TOP .100 TIN Keystone Lite-On Inc National Semi Molex 1593-2 LTST-C930GKT LMV7231SQ 15-38-1026 2 0 1 3 7 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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