u2741b ATMEL Corporation, u2741b Datasheet
u2741b
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u2741b Summary of contents
Page 1
... Electrostatic sensitive device. Observe precautions for handling. 1. Description The U2741B is a PLL transmitter IC which has been especially developed for the demands of RF low-cost data transmission systems at data rates kBaud. The transmitting frequency range is 300 MHz to 450 MHz. The device can be used in both FSK and ASK systems ...
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... Antenna Antenna XTO VCO Power amp. ASK OR FSK Power up VCC VCO CLK f GND 64 LFVCC f n LFGND LF U2741B UHF ASK/FSK Remote control receiver Demod. Control IF Amp PLL XTO LNA VCO DIVC PWRSET PWRVCC PA ANT PWRGND1 PWRGND2 XTO XTO1 XTO2 1...3 4733B–RKE–09/05 ...
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... Applied to VCC Pitch factor setting for crystal 16 DIVIC L: high crystal frequency H: low crystal frequency 4733B–RKE–09/05 ASK 1 16 FSK 2 15 VCC 3 14 CLK 4 13 U2741B GND 5 12 LFVCC 6 11 LFGND DIVIC PWRSET PWRVCC ANT PWRGND1 PWRGND2 XTO1 XTO2 9 U2741B 3 ...
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... FSK modulated. After switching on at FSK, the VCO locks onto the times higher frequency of the crystal oscillator. 4.1 FSK Transmission The U2741B is switched modulated by means of pin FSK. This is done by connecting capacitor C load capacitor C 4.2 ASK Transmission The U2741B is activated by V modulated by means of pin ASK ...
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... MHz 5 ) recommended by the manufacturer 220 . 4 5-1] can be used for output power evaluation, the exact PWRSET L10/ Load-opt U2741B , C , and nF selected in such 220 nH. L Feed Feed = 1 Load_opt 260 + j330 185 + j268 5 ...
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... U2741B 6 ASK 1 OR FSK 2 Power VCC up 3 CLK VCO PA 4 GND LFVCC 6 f XTO LFGND U2741B 2.0 ... 5 DIVC 16 C PWRSET Loop2 15 R PWRSET PWRVCC ANT Feed PWRGND1 Loop1 12 PWRGND2 11 13.56 MHz XTO1 10 C XTO2 ...
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... Symbol Min. Typ. IS off IS 4 transmit P 1.5 3 Ref P –0.5 1 Ref P Ref P Ref P Ref P 1.5 Ref V V – 0.7V outmax U2741B Unit V mW °C °C °C Unit K/W Max. Unit 0.35 µA 6 dBm 3 dBm –1.5 dB –4.0 dB –5 (peak) –40 dBC –58 dBC 7 ...
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... ASK input - Low level input voltage - High level input voltage - Input current High FSK input - Low level input voltage - High level input voltage - Input current High U2741B 8 = 2. –40°C to +85°C (typically 25°C, 3V) S amb Test Conditions M-version 25°C ...
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... Tube, optimized power-supply rejection, value of C SSO16 differs from M-version, enhanced XTO stability, Pb-free SSO16 Taped and reeled, see above, Pb-free 5 max. 4.9 ±0.1 0. Dimensions Drawing refers to following types: SSO16 Package acc. JEDEC MO 137 AB U2741B 3.95 max. 5 ±0.2 6 ±0.2 technical drawings according to DIN specifications 4 9 ...
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... Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4733B-RKE-09/05 U2741B 10 History Put datasheet in a new template Pb-free Logo on page 1 added Ordering Information on page 9 changed 4733B–RKE–09/05 ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...