LMV115MG NSC [National Semiconductor], LMV115MG Datasheet

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LMV115MG

Manufacturer Part Number
LMV115MG
Description
GSM Baseband 30MHz 2.8V Oscillator Buffer
Manufacturer
NSC [National Semiconductor]
Datasheet

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LMV115MGX
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© 2003 National Semiconductor Corporation
LMV115
GSM Baseband 30MHz 2.8V Oscillator Buffer
General Description
The LMV115 is a 30MHz buffer specially designed to mini-
mize the effects of spurious signals from the base band chip
to the oscillator. The buffer also minimizes the influence of
varying load resistance and capacitance to the oscillator and
increases the drive capability.
The input of the LMV115 is internally biased with two equal
resistors to the power supply rails. This allows AC coupling
on the input.
The LMV115 offers a shutdown function to optimize current
consumption. This shutdown function can also be used to
control the supply voltage of an external oscillator. The de-
vice is in shutdown mode when the shutdown pin is con-
nected to V
The LMV115 comes in SC70-6 package. This space saving
product reduces components, improves clock signal and
allows ease of placement for the best form factor.
Schematic Diagram
DD
.
DS200751
Features
(Typical 2.8V supply; values unless otherwise specified)
n Low supply current: 0.3mA
n 2.5V to 3.3V supply
n AC coupling possible without external bias resistors.
n Includes shutdown function external oscillator
n SC70-6 pin package 2.1 x 2mm
n Operating Temperature Range −40˚C to 85˚C
Applications
n Cellular phones
n GSM Modules
n Oscillator Modules
20075129
December 2003
www.national.com

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LMV115MG Summary of contents

Page 1

LMV115 GSM Baseband 30MHz 2.8V Oscillator Buffer General Description The LMV115 is a 30MHz buffer specially designed to mini- mize the effects of spurious signals from the base band chip to the oscillator. The buffer also minimizes the influence of ...

Page 2

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

Page 3

Electrical Characteristics Unless otherwise specified, all limits guaranteed for 50kΩ / 5pF and C L Symbol Parameter Z Input Impedance IN V Output Swing Positive O Output Swing Negative ...

Page 4

... Connection Diagram Ordering Information Package Part Number LMV115MG SC70-6 LMV115MGX www.national.com SC70-6 20075130 Top View Package Marking Transport Media 250 Units Tape and Reel B04 3k Units Tape and Reel 4 NSC Drawing MAA06A ...

Page 5

Typical Performance Characteristics + connected to V /2; Unless otherwise specified. Frequency and Phase Response Phase Response Over Temperature Full Power Bandwidth + − 25˚ 2.8V Frequency Response Over Temperature 20075103 Gain Flatness 0.1dB ...

Page 6

Typical Performance Characteristics + connected to V /2; Unless otherwise specified. (Continued) Transient Response Negative Harmonic Distortion vs. V THD vs. V for Various Frequencies OUT www.national.com + T = 25˚ 2.8V Harmonic Distortion vs. V ...

Page 7

Typical Performance Characteristics + connected to V /2; Unless otherwise specified. (Continued) R vs. Frequency OUT Isolation Output to Input V vs. I (Sourcing) OUT OUT + − 25˚ 2.8V Input Impedance vs. Frequency ...

Page 8

Typical Performance Characteristics + connected to V /2; Unless otherwise specified. (Continued) I Sinking vs vs. V for Unit 1 OS SUPPLY V vs. V for Unit 3 OS SUPPLY www.national.com + T = 25˚ ...

Page 9

Typical Performance Characteristics + connected to V /2; Unless otherwise specified. (Continued) PSRR vs. Frequency Large Signal Pulse Response + − 25˚ 2.8V Small Signal Pulse Response 20075115 20075113 0V, V ...

Page 10

Application Section GENERAL The LMV115 is specially designed to minimize the effects of spurious signals from the base band chip to the oscillator. Beside this the influence of varying load resistance and capacitance to the oscillator is minimized, while increasing ...

Page 11

Application Section (Continued) FIGURE 3. V – V OUT In Figure 3 the input signal is swept between both supply rails (0V - 2.8V). The linear part of the plot ‘V covers approximately the voltage range between 1.0V and 2.0V. ...

Page 12

Application Section (Continued) part itself, adding its own high frequency properties to the overall performance of the circuit good practice to have at least one ground plane on a PCB giving a low impedance path for all decoupling ...

Page 13

Physical Dimensions LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. ...

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