lmv7219-mdc National Semiconductor Corporation, lmv7219-mdc Datasheet

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lmv7219-mdc

Manufacturer Part Number
lmv7219-mdc
Description
7 Nsec, 2.7v To 5v Comparator With Rail-to Rail Output
Manufacturer
National Semiconductor Corporation
Datasheet
© 2004 National Semiconductor Corporation
LMV7219
7 nsec, 2.7V to 5V Comparator with Rail-to-Rail Output
General Description
The LMV7219 is a low-power, high-speed comparator with
internal hysteresis. The LMV7219 operating voltage ranges
from 2.7V to 5V with push/pull rail-to-rail output. This device
achieves a 7ns propagation delay while consuming only
1.1mA of supply current at 5V.
The LMV7219 inputs have a common mode voltage range
that extends 200mV below ground, allowing ground sensing.
The internal hysteresis ensures clean output transitions even
with slow-moving inputs signals.
The LMV7219 is available in the SC70-5 and SOT23-5
packages, which are ideal for systems where small size and
low power are critical.
Typical Application
DS101054
Features
(V
n Propagation delay
n Low supply current
n Input common mode voltage range extends 200mv
n Ideal for 2.7V and 5V single supply applications
n Internal hysteresis ensures clean switching
n Fast rise and fall time
n Available in space-saving packages: 5-pin SC70-5 and
Applications
n Portable and battery-powered systems
n Scanners
n Set top boxes
n High speed differential line receiver
n Window comparators
n Zero-crossing detectors
n High-speed sampling circuits
S
below ground
SOT23-5
= 5V, T
A
= 25˚C, Typical values unless specified)
10105401
November 2004
www.national.com
1.1mA
1.3ns
7ns

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lmv7219-mdc Summary of contents

Page 1

... This device achieves a 7ns propagation delay while consuming only 1.1mA of supply current at 5V. The LMV7219 inputs have a common mode voltage range that extends 200mV below ground, allowing ground sensing. The internal hysteresis ensures clean output transitions even with slow-moving inputs signals ...

Page 2

... Connection Diagram Ordering Information Package Part Number LMV7219M7 5-pin SC70-5 LMV7219M7X LMV7219M5 5-pin SOT23-5 LMV7219M5X Simplified Schematic www.national.com SC70-5/SOT23-5 10105402 Top View Marking Supplied as C15 1k Units Tape and Reel C15 3k Units Tape and Reel C14A 1k Units Tape and Reel C14A ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Machine Body Human Model Body Differential Input Voltage Output Short Circuit Duration + − Supply ...

Page 4

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T − Boldface limits apply at the temperature extremes. Symbol Parameter t Propagation Delay PD t Propagation Delay Skew SKEW t Output Rise Time r t Output Fall ...

Page 5

... Note 9: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings. Note 10: The LMV7219 comparator has internal hysteresis. The trip points are the input voltage needed to change the output state in each direction. The offset voltage is defined as the average of V ...

Page 6

Typical Performance Characteristics Supply Current vs. Supply Voltage Input Offset and Trip Voltage vs. Supply Voltage Sourcing Current vs. Output Voltage www.national.com Unless otherwise specified vs. Supply Voltage OS 10105404 Sourcing Current vs. Output Voltage 10105406 Sinking Current ...

Page 7

Typical Performance Characteristics 25˚C (Continued) Sinking Current vs. Output Voltage Propagation Delay vs. Temperature ( Propagation Delay vs. Input Overdrive Unless otherwise specified, V Propagation Delay vs. Temperature (V = 2.7V, V ...

Page 8

... Propagation Delay ( 10105417 The LMV7219 has a push pull output. When the output switches, there is a direct path between V causing high output sinking or sourcing current during the transition. After the transition, the output current decreases and the supply current settles back to about 1.1mA at 5V, thus conserving power consumption ...

Page 9

... R3 is low enough to affect the bias string and adjustment of R1 may be also required. FIGURE 2. Additional Hysteresis Circuit Layout and Bypassing The LMV7219 requires high-speed layout. Follow these lay- out guidelines: 1. Power supply bypassing is critical, and will improve sta- bility and transient response. A decoupling capacitor such as 0.1µ ...

Page 10

... FIGURE 5. Crystal Oscillator www.national.com IR Receiver The LMV7219 is an ideal candidate to be used as an infrared receiver. The infrared photo diode creates a current relative to the amount of infrared light present. The current creates a voltage across RD. When this voltage level cross the voltage applied by the voltage divider to the inverting input, the output transitions ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SC70-5 NS Package Number MAA05A 11 www.national.com ...

Page 12

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry ...

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