データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

LMX2240M データシート(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LMX2240M
部品情報  Intermediate Frequency Receiver
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMX2240M データシート(HTML) 4 Page - National Semiconductor (TI)

  LMX2240M Datasheet HTML 1Page - National Semiconductor (TI) LMX2240M Datasheet HTML 2Page - National Semiconductor (TI) LMX2240M Datasheet HTML 3Page - National Semiconductor (TI) LMX2240M Datasheet HTML 4Page - National Semiconductor (TI) LMX2240M Datasheet HTML 5Page - National Semiconductor (TI) LMX2240M Datasheet HTML 6Page - National Semiconductor (TI) LMX2240M Datasheet HTML 7Page - National Semiconductor (TI) LMX2240M Datasheet HTML 8Page - National Semiconductor (TI) LMX2240M Datasheet HTML 9Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 12 page
background image
Typical Application Block Diagram
TLW11755 – 3
Functional Description
OVERVIEW
The LMX2240 IF demodulator is a low power IF processor
that includes a frequency discriminator an IF hard limiting
amplifier and a received signal strength indicator (RSSI)
The LMX2240 is capable of differentially demodulating an
FM or AM signal with as high an IF as 150 MHz avoiding a
costly second down-conversion The RSSI output can be
used for time gated channel measurements required in
TDMA and other systems Other features include high re-
ceiver sensitivity and a power down mode to allow for stand-
by operation
THE LIMITING AMPLIFIER
The limiting amplifier has a typical gain of 70 dB and a sen-
sitivity of about b75 dBm This allows it to be used in the
DECT system with 20 dB net RF gain in front of it to achieve
a sensitivity of b95 dBm The limiter is a five stage amplifier
with internal compensation at each stage to ensure stability
Two external compensation capacitors are also required to
further enhance stability The input to the limiter is a relative-
ly low impedance to allow easy matching to typical IF sur-
face acoustic wave (SAW) filters The output of the limiter is
connected off chip to an external quadrature tank circuit as
well as connected internally to the discriminator (mixer) The
output impedance of the limiter is 250X (typical)
THE RECEIVED SIGNAL STRENGTH INDICATOR (RSSI)
The RSSI circuit has a range of 70 dB Its output voltage is
proportional to the logarithm of the input signal level The
RSSI circuit has a sensitivity of b82 dBm The output volt-
age of the circuit ranges from 05V to 15V typically
THE FREQUENCY DISCRIMINATOR
The frequency discriminator is a Gilbert cell mixer that re-
quires an external tank circuit to create a 90 phase shift at
the desired frequency The output of this circuit is centered
at 15V by an internal level shifting circuit and a mid-range
voltage (at 15V) is also provided The sensitivity of the dis-
criminator to phase inaccuracies is 55 mVdegree (see Ap-
plications Information) This means that for a phase imbal-
ance of 10
the received eye diagram will be shifted by
about 55 mV off of the 15V mid-range voltage For the typi-
cal case this amounts to about 10% of the output eye dia-
gram (for 400 mVPP output)
4


同様の部品番号 - LMX2240M

メーカー部品番号データシート部品情報
logo
National Semiconductor ...
LMX2216 NSC-LMX2216 Datasheet
258Kb / 12P
   0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer for RF Personal Communications
LMX2216M NSC-LMX2216M Datasheet
258Kb / 12P
   0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer for RF Personal Communications
More results

同様の説明 - LMX2240M

メーカー部品番号データシート部品情報
logo
New Jersey Semi-Conduct...
2N2991 NJSEMI-2N2991 Datasheet
116Kb / 2P
   HIGH-FREQUENCY INTERMEDIATE-POWER TRANSISTORS
logo
Integrated Device Techn...
IDTF1200 IDT-IDTF1200 Datasheet
1Mb / 13P
   Intermediate Frequency Digital Variable Gain Amplifier
logo
Renesas Technology Corp
IDTF1200 RENESAS-IDTF1200 Datasheet
2Mb / 14P
   Intermediate Frequency Digital Variable Gain Amplifier
logo
Integrated Device Techn...
IDTF1240NBGI IDT-IDTF1240NBGI Datasheet
1Mb / 23P
   Dual Intermediate Frequency Digital Variable Gain Amplifier
logo
Panasonic Semiconductor
2SC4787 PANASONIC-2SC4787 Datasheet
40Kb / 2P
   Silicon NPN epitaxial planer type(For intermediate frequency amplification)
logo
NXP Semiconductors
UAA3202M PHILIPS-UAA3202M Datasheet
125Kb / 24P
   Frequency Shift Keying FSK receiver
1997 Aug 12
logo
ams AG
AS3932 AMSCO-AS3932 Datasheet
1Mb / 33P
   3D Low Frequency Wakeup Receiver
logo
Motorola, Inc
MC145436 MOTOROLA-MC145436 Datasheet
449Kb / 6P
   DUAL TONE MULTIPLE FREQUENCY RECEIVER
logo
ams AG
AS3932 AMSCO-AS3932_07 Datasheet
402Kb / 34P
   3D Low Frequency Wakeup Receiver
logo
Sciosense B.V.
AS3932 SCIOSENSE-AS3932 Datasheet
907Kb / 50P
   3D Low Frequency Wakeup Receiver
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com