Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Comparator Window NMOS, Open drain WQFN 24 (4x4)

Controller

(FPGA)

Ch. 1

UV1

OV6

OV5

OV4

OV3

OV2

V+ = 3.3V

OV1

+IN1

-IN1

GND

CO1

COPOL

UV6

UV5

UV4

UV3

UV2

UV1

* Open

Drain

AOSEL

OV1

RESERVED

Ch. 6

+IN6

-IN6

CO6

REF

LMV7231

COPOL

REF

UV6 OV6

REF

BST

VCC

RON/SD

VIN

Input = 9V-42V

1.0 PF

115k

100 PH

0.1

22 PF

0.01PF

OUT

= 5V

0.1 PF

0.01 PF

121k

2200

LM25007

RTN

1.15k

95.3

R10

10k

R12

10k

ON/OFF

0.1 PF

*optional

RCL

200k

R11

10k

V+

LMV7231

www.ti.com

SNOSB45E –FEBRUARY 2010–REVISED MARCH 2013

LMV7231 Hex Window Comparator with 1.5% Precision and 400mV Reference

Check for Samples: LMV7231

FEATURES

DESCRIPTION

The LMV7231 is a 1.5% accurate Hex Window

• (For V

= 3.3V ±10%, Typical Unless Otherwise

Comparator which can be used to monitor power

Noted)

supply voltages. The device uses an internal 400mV

• High Accuracy Voltage Reference: 400 mV

reference for the comparator trip value. The

• Threshold Accuracy: ±1.5% (max)

comparator set points can be set via external resistor

dividers. The LMV7231 has 6 outputs (CO1-CO6)

• Wide Supply Voltage Range +2.2V to +5.5V

that signal an under-voltage or over-voltage event for

• Input/Output Voltage Range Above V+

each power supply input. An output (AO) is also

• Internal Hysteresis: 6mV

provided to signal when any of the power supply

inputs have an over-voltage or under-voltage event.

• Propagation Delay: 2.6 µs to 5.6 µs

This ability to signal an under-voltage or over-voltage

• Supply Current 7.7 µA Per Channel

event for the individual power supply inputs, in

• 24 Lead WQFN Package

addition to an output to signal such an event on any

of the power supply inputs adds unparalleled system

• Temperature Range: -40°C to 125°C

protection capability.

APPLICATIONS

The LMV7231’s +2.2V to +5.5V power supply voltage

range, low supply current, and input/output voltage

• Power Supply Voltage Detection

range above V+ make it ideal for a wide range of

• Battery Monitoring

power supply monitoring applications. Operation is

• Handheld Instruments

ensured over the -40°C to +125°C temperature

range. The device is available in a 24-pin WQFN

• Relay Driving

package.

• Industrial Control Systems

Typical Application Circuit

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (21 pages)

PAGE 1
LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 LMV7231 Hex Window Comparator with 1.5% Precision and 400mV Reference Check for Samples: LMV7231 FEATURES DESCRIPTION • The LMV7231 is a 1.5% accurate Hex Window Comparator which can be used to monitor power supply voltages. The device uses an internal 400mV reference for the comparator trip value. The comparator set points can be set via external resistor dividers.
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LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) ESD Tolerance (3) Human Body Model 2000V Machine Model 200V Supply Voltage 6V 6V to (GND − 0.
PAGE 3
LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 +3.3V Electrical Characteristics (continued) Unless otherwise specified, all limits ensured for TA = 25°C, V+ = 3.3V ±10%, GND = 0V, and RL > 1MΩ. Boldface limits apply for TA = –10°C to +70°C.
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LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com PIN DESCRIPTIONS Pin 4 Symbol Type 1 -IN1 Analog Input Negative input for window comparator 1. 2 +IN1 Analog Input Positive input for window comparator 1. 3 -IN2 Analog Input Negative input for window comparator 2. 4 +IN2 Analog Input Positive input for window comparator 2. 5 -IN3 Analog Input Negative input for window comparator 3. 6 +IN3 Analog Input Positive input for window comparator 3.
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LMV7231 www.ti.
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LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics V+ = 3.3V and TA =25°C unless otherwise noted. −In Input Rising Threshold Distribution RELATIVE FREQUENCY (%) RELATIVE FREQUENCY (%) +In Input Rising Threshold Distribution 40 35 30 25 20 15 10 5 0 396 397 398 399 400 401 402 403 404 40 35 30 25 20 15 10 5 0 396 397 398 399 400 401 402 403 404 INPUT RISING THRESHOLD (mV) Figure 2. Figure 3.
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LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 Typical Performance Characteristics (continued) + V = 3.3V and TA =25°C unless otherwise noted. 405 404 403 402 401 400 399 398 397 396 395 Input Rising Threshold Voltage vs. Supply Voltage INPUT RISING THRESHOLD VOLTAGE (mV) INPUT RISING THRESHOLD VOLTAGE (mV) Input Rising Threshold Voltage vs.
PAGE 8
LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) + V = 3.3V and TA =25°C unless otherwise noted. Supply Current vs. Supply Voltage and Temperature Supply Current vs. Output Sink Current 50 125°C 85°C 50 SUPPLY CURRENT (PA) SUPPLY CURRENT (éA) TA = 25°C 49 60 25°C 40 30 -40°C 20 10 0 48 47 46 5.5V 45 44 3.3V 43 42 41 1 2 3 4 5 2.2V 40 0 6 1 SUPPLY VOLTAGE (V) SUPPLY CURRENT (PA) SUPPLY CURRENT (PA) 5.5V 3.3V 2.
PAGE 9
LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 Typical Performance Characteristics (continued) + V = 3.3V and TA =25°C unless otherwise noted. Bias Current vs. Input Voltage Bias Current vs. Input Voltage 0.4 2.0 125°C -IN BIAS CURRENT (nA) BIAS CURRENT (nA) 1.6 0.3 25°C -IN 0.2 -40°C -IN 0.1 25°C +IN 125°C +IN 1.2 0.8 85°C -IN 0.4 -40°C +IN 0.0 0.0 0.6 1.2 1.8 2.4 3.0 0.0 0.0 3.6 85°C +IN 0.6 1.2 INPUT VOLTAGE (V) Figure 21. Output Voltage Low vs.
PAGE 10
LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) + V = 3.3V and TA =25°C unless otherwise noted. Output Short Circuit Current vs. Output Voltage TA = 25°C 80 V+ = 5.5V 60 40 V+ = 3.3V 20 V+ = 2.2V 0 0 1 2 4 5 70 OUTPUT SHORT CIRCUIT CURRENT (mA) OUTPUT SHORT CIRCUIT CURRENT (mA) 100 Output Short Circuit Current vs. Output Voltage V+ = 3.3V 60 25°C 50 40 30 85°C 20 125°C 10 0 0 6 1 1 OUTPUT VOLTAGE (V) 3 Figure 26.
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LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 Typical Performance Characteristics (continued) + V = 3.3V and TA =25°C unless otherwise noted. OITPUT LEAKAGE CURRENT (nA) Output Leakage Current vs. Output Voltage 125°C V+ = 3.3V 10 1 85°C 0.1 0.01 0 1 2 4 5 6 OUTPUT VOLTAGE (V) Figure 32.
PAGE 12
LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com APPLICATION INFORMATION 3 RESISTOR VOLTAGE DIVIDER SELECTION The LMV7231 trip points can be set by external resistor dividers as shown in Figure 33 V+ VIN 0.1 PF COPOL R1 Ch. 1 + - +IN1 * * R2 10k CO1 VOUT + - -IN1 R3 REF COPOL OV1 UV1 Ch. 6 +IN6 CO6 -IN6 REF REF REF LMV7231 OV6 UV6 AOSEL OV1 OV2 OV3 OV4 OV5 OV6 AO * UV1 UV2 UV3 UV4 UV5 UV6 GND 10k * Open Drain RESERVED Figure 33.
PAGE 13
LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 VUV VOV VUV VOUT VOV VOUT VIN VIN R3 set R3 set R2 = R3((VTHF/VTHR)VOV/VUV ± 1) R2 = R3(VOV/VUV ± 1) R1 = R3((1/VTHR)VOV - (VTHF/VTHR)VOV/VUV) R1 = R3((1/VTHR)VOV - VOV/VUV) Ex. VOV = 3.465V, VUV = 3.135V, i.e. VRANGE = 3.3V +/- 5% Ex. VOV = 3.465V, VUV = 3.135V, i.e. VRANGE = 3.3V +/- 5% R3 set to 10 k5 R3 set to 10 k5 R2 = 10k((0.394/0.4)3.465/3.135 ± 1) 8875 R1 = 10k((1/0.4)3.465 - (0.394/0.4)3.465/3.135) R2 = 10k((3.
PAGE 14
LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com The supply independent inputs of the window comparator blocks allow the LMV7231 to be tolerant of system faults. For example if the power is suddenly removed from the LMV7231 due to a system malfunction yet there still exists a voltage on the input, this will not be an issue as long as the monitored input voltage does not exceed absolute maximum ratings.
PAGE 15
LMV7231 www.ti.com SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 Resistor R6 and capacitors C6, C7 are utilized to minimize output ripple voltage per the LM25007 evaluation board application note. The comparator voltage window is set to 5V +/- 5% by R7=1.15kΩ , R8=10Ω, R9=95.3Ω. See 3 RESISTOR VOLTAGE DIVIDER SELECTION section in the Application Information section of the datasheet for details on how to set the comparator voltage window.
PAGE 16
LMV7231 SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision D (March 2013) to Revision E • 16 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMV7231SQ/NOPB WQFN RTW 24 LMV7231SQE/NOPB WQFN RTW LMV7231SQX/NOPB WQFN RTW SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 24 250 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 24 4500 330.0 12.4 4.3 4.3 1.3 8.0 12.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMV7231SQ/NOPB WQFN RTW 24 1000 210.0 185.0 35.0 LMV7231SQE/NOPB WQFN RTW 24 250 210.0 185.0 35.0 LMV7231SQX/NOPB WQFN RTW 24 4500 367.0 367.0 35.
PAGE 20
MECHANICAL DATA RTW0024A SQA24A (Rev B) www.ti.
PAGE 21
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