LMV228SD National Semiconductor, LMV228SD Datasheet

LMV228SD

Manufacturer Part Number
LMV228SD
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of LMV228SD

Pin Count
6
Screening Level
Industrial
Package Type
LLP EP
Lead Free Status / Rohs Status
Not Compliant
© 2006 National Semiconductor Corporation
LMV225/LMV226/LMV228
RF Power Detector for CDMA and WCDMA
General Description
The LMV225/LMV226/LMV228 are 30 dB RF power detec-
tors intended for use in CDMA and WCDMA applications.
The device has an RF frequency range from 450 MHz to 2
GHz. It provides an accurate temperature and supply com-
pensated output voltage that relates linearly to the RF input
power in dBm. The circuit operates with a single supply from
2.7V to 5.5V. The LMV225/LMV226/LMV228 have an inte-
grated filter for low-ripple average power detection of CDMA
signals with 30 dB dynamic range. Additional filtering can be
applied using a single external capacitor.
The LMV225 has an RF power detection range from –30
dBm to 0 dBm and is ideally suited for direct use in combi-
nation with resistive taps. The LMV226/LMV228 have a de-
tection range from –15 dBm to 15 dBm and are intended for
use in combination with a directional coupler. The LMV226 is
equipped with a buffered output which makes it suitable for
GSM, EDGE, GPRS and TDMA applications.
The device is active for Enable = HI, otherwise it is in a low
power consumption shutdown mode. During shutdown the
output will be LOW. The output voltage ranges from 0.2V to
2V and can be scaled down to meet ADC input range re-
quirements.
The LMV225/LMV226/LMV228 power detectors are offered
in the thin 1.0 mm x 1.0 mm x 0.6 mm micro SMD package
and the ultra thin 1.0 mm x 1.0 mm x 0.35 mm micro SMD
package. The LMV225 and the LMV228 are also offered in
the 2.2 mm x 2.5 mm x 0.8 mm LLP package.
Typical Application
LMV225
DS200760
20076001
Features
n 30 dB linear in dB power detection range
n Output voltage range 0.2 to 2V
n Logic low shutdown
n Multi-band operation from 450 MHz to 2000 MHz
n Accurate temperature compensation
n Packages:
Applications
n CDMA RF power control
n WCDMA RF power control
n CDMA2000 RF power control
n PA modules
— micro SMD thin 1.0 mm x 1.0 mm x 0.6 mm
— micro SMD ultra thin 1.0 mm x 1.0 mm x 0.35 mm
— LLP 2.2 mm x 2.5 mm x 0.8 mm
(LMV225 and LMV228)
LMV226/LMV228
October 2006
www.national.com
20076046

Related parts for LMV228SD

LMV228SD Summary of contents

Page 1

... SMD package. The LMV225 and the LMV228 are also offered in the 2 2 0.8 mm LLP package. Typical Application LMV225 © 2006 National Semiconductor Corporation Features linear in dB power detection range n Output voltage range 0 Logic low shutdown ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage V - GND DD ESD Tolerance (Note 2) Human Body Model Machine Model Storage Temperature Range 2.7 DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V ...

Page 3

DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V (Note 4) Symbol Parameter Logarithmic Slope (Note 8) Logarithmic Intercept (Note 8) V Output Voltage OUT I Output Current OUT Sourcing/Sinking R Output Impedance OUT ...

Page 4

DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V (Note 4) Symbol Parameter Variation Due to Temperature 5.0 DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V (Note 4) ...

Page 5

DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V (Note 4) Symbol Parameter t Turn-on-Time (Note Rise Time (Note Current Into RF /E Pin ...

Page 6

DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V (Note 4) Symbol Parameter Logarithmic Intercept (Note 8) V Output Voltage OUT I Output Current OUT Sourcing/Sinking R Output Impedance OUT e Output Referred Noise ...

Page 7

DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to V (Note 4) Symbol Parameter Variation Due to Temperature Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings ...

Page 8

... LMV226UR LMV226URX LMV228TL LMV228TLX 4-Bump micro SMD LMV228UR LMV228URX LMV228SD 6-pin LLP LMV228SDX Note: TL and TLX products are offered both with leaded and lead free bumps. UR and URX products are offered with lead free bumps. www.national.com 20076002 Name V Positive Supply Voltage DD ...

Page 9

Block Diagrams 20076064 LMV225 20076049 LMV226 20076047 LMV228 9 www.national.com ...

Page 10

Typical Performance Characteristics LMV225 Unless otherwise specified 2.7V Supply Current vs. Supply Voltage (LMV225) Output Voltage and Log Conformance vs. RF Input Power @ 900 MHz (LMV225) Output Voltage and Log Conformance vs. RF Input Power ...

Page 11

Typical Performance Characteristics LMV225 Unless otherwise specified 2.7V Logarithmic Slope vs. Frequency (LMV225) Output Variation vs. RF Input Power Normalized to 25˚C @ 900 MHz (LMV225) Output Variation vs. RF Input Power Normalized to 25˚C @ ...

Page 12

Typical Performance Characteristics LMV225 Unless otherwise specified 2.7V PSRR vs. Frequency (LMV225 in microSMD) RF Input Impedance vs. Frequency Reactance (LMV225 in micro SMD) www.national.com = 25˚C. (Continued) J 20076023 @ Resistance and RF Input Impedance ...

Page 13

Typical Performance Characteristics LMV226 Unless otherwise specified 2.7V Supply Current vs. Supply Voltage (LMV226) Output Voltage and Log Conformance vs Input Power 900 MHz (LMV226) Output Voltage and Log Conformance vs. RF Input Power ...

Page 14

Typical Performance Characteristics LMV226 Unless otherwise specified 2.7V Logarithmic Slope vs. Frequency (LMV226) Output Variation vs. RF Input Power @ Normalized to 25˚C 900 MHz (LMV226) Output Variation vs. RF Input Power Normalized to 25˚C @ ...

Page 15

Typical Performance Characteristics LMV226 Unless otherwise specified 2.7V PSRR vs. Frequency (LMV226) = 25˚C. (Continued Input Impedance vs. Frequency 20076023 15 @ Resistance and Reactance (LMV226) 20076024 www.national.com ...

Page 16

Typical Performance Characteristics LMV228 in microSMD Unless otherwise specified 2.7V Supply Current vs. Supply Voltage (LMV228 in microSMD) Output Voltage and Log Conformance vs. RF Input Power @ 900 MHz (LMV228 in microSMD) Output Voltage and ...

Page 17

Typical Performance Characteristics LMV228 in microSMD Unless otherwise specified 2.7V Logarithmic Slope vs. Frequency (LMV228 in microSMD) Output Variation vs. RF Input Power Normalized to 25˚C @ 900 MHz (LMV228 in microSMD) Output Variation vs. RF ...

Page 18

Typical Performance Characteristics LMV228 in microSMD Unless otherwise specified 2.7V PSRR vs. Frequency (LMV228 in microSMD) www.national.com = 25˚C. (Continued Input Impedance vs. Frequency Reactance (LMV228 in microSMD) 20076023 18 @ Resistance and 20076024 ...

Page 19

Typical Performance Characteristics LMV228 in LLP Unless otherwise specified 2.7V Supply Current vs. Supply Voltage (LMV228 in LLP) Output Voltage and Log Conformance vs. RF Input Power @ 900 MHz (LMV228 inLLP) Output Voltage and Log ...

Page 20

Typical Performance Characteristics LMV228 in LLP Unless otherwise specified 2.7V Logarithmic Slope vs. Frequency (LMV228 in LLP) Output Variation vs. RF Input Power Normalized to 25˚C @ 900 MHz (LMV228 in LLP) Output Variation vs. RF ...

Page 21

Typical Performance Characteristics LMV228 in LLP Unless otherwise specified 2.7V PSRR vs. Frequency (LMV228 in LLP) = 25˚C. (Continued Input Impedance vs. Frequency 20076065 21 @ Resistance and Reactance (LMV228 in LLP) 20076066 www.national.com ...

Page 22

Application Notes CONFIGURING A TYPICAL APPLICATION The LMV225/LMV226/LMV228 are power detectors in- tended for CDMA and WCDMA applications. Power applied at its input translates voltage on the output through a linear-in-dB response. The LMV225 detector is especially ...

Page 23

Application Notes (Continued) number. The goal is to have a magnitude transfer, which is sufficiently flat in the used frequency range; capacitor C should be chosen significantly larger than capacitor C assure a proper performance of the high resistive tap. ...

Page 24

Application Notes (Continued) FIGURE 5. V vs. RF Input Power P OUT The output voltage variation ∆V OUT input signals that fall within the linear range (in dB) of the detector. In other words, the output variation is independent of ...

Page 25

Application Notes (Continued) FIGURE 8. Gain Cell All gain cell outputs are AM-demodulated with a peak detec- tor and summed together. This results in a logarithmic func- tion. The logarithmic range is about: 20 · n · log (A) where, ...

Page 26

... Physical Dimensions NOTES: UNLESS OTHERWISE SPECIFIED 1. EPOXY COATING 2. FOR SOLDER BUMP COMPOSITION, SEE “SOLDER INFORMATION” IN THE PACKAGE SECTION OF THE NATIONAL SEMICONDUCTOR WEB PAGE (www.national.com). 3. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD. 4. PIN A1 IS ESTABLISHED BY LOWER LEFT CORNER WITH RESPECT TO TEXT ORIENTATION. ...

Page 27

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) NOTES: UNLESS OTHERWISE SPECIFIED 1. FOR SOLDER BUMP COMPOSITION, SEE “SOLDER INFORMATION” IN THE PACKAGE SECTION OF THE NATIONAL SEMICONDUCTOR WEB PAGE (www.national.com). 2. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD. 3. PIN A1 IS ESTABLISHED BY LOWER LEFT CORNER WITH RESPECT TO TEXT ORIENTATION. ...

Page 28

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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