lmx2505lq1321 National Semiconductor Corporation, lmx2505lq1321 Datasheet
lmx2505lq1321
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lmx2505lq1321 Summary of contents
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... LMX2505 is available in a 28-pin leadless leadframe pack- age (LLP). Functional Block Diagram FastLock ™ trademark of National Semiconductor Corporation. TRI-STATE ® registered trademark of National Semiconductor Corporation. PLLatinum is a trademark of National Semiconductor Corporation. ™ © 2004 National Semiconductor Corporation Features n Small Size 5 5 0.75 mm 28-Pin LLP Package ...
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Connection Diagram NOTE: Analog ground connected through exposed die attached pad. Pin Descriptions Pin Number Name 1 OSCin 2 GND GND ...
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... Ordering Information Part Number RF1 Min. (MHz) LMX2505LQX1321 1270.22 LMX2505LQ1321 1270.22 Part Number Description Typical Application Circuit Note 1: Refer to RF2 VCO Tuning Range vs. External Inductance plot to aid in selecting the appropriate external inductance, PCB trace and L1, for the desired frequency range. RF1 Max. ...
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Absolute Maximum Ratings 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Parameter Symbol Ratings Supply Voltage -0 Voltage on any pin V ...
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Electrical Characteristics ˚C; Limits in boldface type apply over the operating temperature range from -20 ˚C ≤ noted.) (Continued) Symbol Parameter RF1 VCO for PDC1500 L(f) Phase Noise when RF1 VCO for RF1out PDC1500 is ...
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Electrical Characteristics ˚C; Limits in boldface type apply over the operating temperature range from -20 ˚C ≤ noted.) (Continued) Symbol Parameter DIGITAL INTERFACE (DATA, CLK, LE, LD, CE, BS) V High-Level Input Voltage IH V ...
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Typical Performance Characteristics RF2 VCO Tuning Range vs. External Inductance (Note 13) Note 12: Typical performance characteristics do not guarantee specific performance limits. For guaranteed specifications, refer to the Electrical Characteristics section. Note 13: The frequency range is defined as ...
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Functional Description GENERAL The LMX2505 is a highly integrated frequency synthesizer system for Japan PDC wireless communication systems. The LMX2505 supports dual band operation for 800 MHz and 1500 MHz. The LMX2505 includes all functional blocks for the RF PLL ...
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Functional Description BAND SELECT MODE The BS pin and BS bit can be used to select one of the two RF VCO outputs. When using the BS pin, the BS bit must be set to 0, and when using the ...
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Functional Description HIGH SPEED LOCK-UP MODE Two frequency-locking modes are provided: a Normal mode and a High Speed mode for faster lock times. The HS bit in register R0 controls the locking mode. TABLE 5. Lock-up Modes HS Bit 0 ...
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Programming Description GENERAL PROGRAMMING INFORMATION The serial interface has a 24-bit shift register to store the incoming data bits temporarily. The incoming data is first loaded into the shift register from MSB to LSB. The data is shifted at the ...
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Programming Description R0 REGISTER The R0 register address bits (R0 [1:0]) are “00”. The Rx/Tx bit selects between receive and transmit modes and, in conjunction with the band select bit (BS), the channel spacing to be synthesized. The RF_PD bit ...
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Programming Description PULSE SWALLOW FUNCTION RF_B + RF_A + (RF_FN / FD VCO RF_B + RF_A + (RF_FN / FD VCO f : Output frequency of voltage controlled ...
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Programming Description R1 REGISTER The R1 register address bits (R1 [1:0]) are “01”. The SPI_DEF bit allows for the programming of words R3 to R5. Under most circumstances, the SPI_DEF bit should be set to 1. The LD bit sets ...
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Programming Description R2 REGISTER The R2 register address bits (R2 [1:0]) are “10”. MSB (Default) R3 REGISTER The R3 register address bits (R3 [2:0]) are “011”. This register is ...
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... 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. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...