lmx1602tmx National Semiconductor Corporation, lmx1602tmx Datasheet
lmx1602tmx
Available stocks
Related parts for lmx1602tmx
lmx1602tmx Summary of contents
Page 1
... LMX1600 or LMX1602. Powerdown for the PLL is hardware controlled. The LMX1600/01/02 is available pin TSSOP surface mount plastic package. Functional Block Diagram TRI-STATE ® registered trademark of National Semiconductor Corporation. MICROWIRE ™ and PLLatinum ™ are trademarks of National Semiconductor Corporation. © 2005 National Semiconductor Corporation ...
Page 2
Connection Diagrams Order Number LMX1600SLB, LMX1601SLB, or LMX1602SLB Order Number LMX1600TM, LMX1601TM, or LMX1602TM www.national.com 10012922 NS Package Number SLB16A 10012902 NS Package Number MTC16 2 ...
Page 3
Pin Descriptions Pin No. for Pin No. for 16-pin CSP 16-pin Pin Name Package TSSOP Package 16 1 FoLD 1 2 OSC OSC OUT 3 4 GND 4 5 fin AUX AUX 6 ...
Page 4
Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Parameter Power Supply Voltage Voltage on any pin with GND=0V Storage Temperature Range Lead Temp. (solder 4 sec) ESD-Human ...
Page 5
Electrical Characteristics ( 3.0V 25˚C except as specified) CC MAIN CC AUX A Symbol Parameter I High-Level Input Current IH I Low-Level Input Current IL I OSC Input Current OSC Input Current ...
Page 6
Functional Description The basic phase-lock-loop (PLL) configuration consists of a high-stability crystal reference oscillator, a frequency synthe- sizer such as the National Semiconductor LMX1600/01/02, a voltage controlled oscillator (VCO), and a passive loop filter. The frequency synthesizer includes a ...
Page 7
Functional Description comparison cycles. The lock detect output is low when the error between the phase detector outputs is more than 30 ns for one comparison cycle. The lock detect output is always low when the PLL is in ...
Page 8
Programming Description 2.2.2 MAIN_R REGISTER If the Control Bits (CTL [1:0]) are 1 0 when LE transitions high, data is transferred from the 18-bit shift register into a latch which sets the Main PLL 12-bit R counter divide ratio ...
Page 9
Programming Description 2.3.3 12-BIT Programmable Counter Divide Ratio (Aux B COUNTER) Divide Ratio • 4,095 Note 10: Divide ratio 4,095 (Divide ratios less than 3 are prohibited) AUX_B_CNTR ≥ AUX_A_CNTR. See section 2.3.7 for ...
Page 10
Programming Description 2.3.6 Programmable Counter Divide Ratio (Main B COUNTER) Divide Ratio 3 4 • 2,047 Note 13: Divide ratio 2,047 (Divide ratios less than 3 are prohibited) MAIN_B_CNTR ≥ MAIN_A_CNTR. See section 2.3.7 for calculation of ...
Page 11
Programming Description 2.4 CHARGE PUMP CONTROL WORD (CP_WORD) MSB AUX_CP_GAIN BIT LOCATION AUX_CP_GAIN MAIN_R[17] MAIN_CP_GAIN MAIN_R[16] AUX_PD_POL MAIN_R[15] MAIN_PD_POL MAIN_R[14] AUX_CP_GAIN (MAIN_R[17]) and MAIN_CP_GAIN (MAIN_R[16]) are used to select charge pump current magnitude either low gain mode (160 µA ...
Page 12
Programming Description FoLD Note 16: See section 2.5.3 for AUX_R[14] description. 2.5.1 Lock Detect Digital Filter The Lock Detect Digital Filter compares the difference between the phase ...
Page 13
Programming Description 2.5.2 Typical Lock Detect Timing (AUX_PD_POL/MAIN_PD_POL = 1) 2.5.3 OSC Mode Programming The OSC pin can be optimized for operating with an external crystal resonator or an external reference frequency source (i.e. out TCXO). If the application ...
Page 14
Programming Description 2.6 SERIAL DATA INPUT TIMING Note 17: Data shifted into register on clock rising edge. Data is shifted in MSB first. TEST CONDITIONS: The Serial Data Input Timing is tested using a symmetrical waveform around V an ...
Page 15
Programming Description 2.7 TYPICAL APPLICATION EXAMPLE OPERATIONAL NOTES: * VCO is assumed AC coupled increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10Ω 200Ω ...
Page 16
Physical Dimensions Dimensions are in millimeters. Order Number LMX1600TM, LMX1601TM, or LMX1602TM www.national.com inches (millimeters) unless otherwise noted 16-Pin TSSOP Package (MTC16) NS Package Number MTC16 16 ...
Page 17
Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LMX1600SLB, LMX1601SLB, or LMX1602SLB National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time ...