8N3DV85AC-0049CDI8

LVPECL Dual-Frequency  Programmable VCXO IDT8N3DV85 DATASHEET General Description Features The IDT8N3DV85 is a LVPECL Dual-Frequency Programmable VCXO with very flexible frequency and pull-range programming capabilities. The device uses IDT’s fourth generation FemtoClock® NG technology for an optimum of high clock frequency and low phase noise performance. The device accepts 2.5V or 3.3V supply and is packaged in a small, lead-free (RoHS 6) 6-lead ceramic 5mm x 7mm x 1.55mm package. • Fourth Generation FemtoClock® NG technology • Programmable clock output frequency from 15.476MHz to 866.67MHz and from 975MHz to 1,300MHz • • • Two factory-programmed output frequencies • • • VCXO pull range programmable from typical ±12.5 to ±787.5ppm • • • • • RMS phase jitter @ 622.08MHz (12kHz - 20MHz):0.46ps (typical) The device can be factory-programmed to any two frequencies in the range of 15.476MHz to 866.67MHz and from 975MHz to 1,300MHz to the very high degree of frequency precision of 218Hz or better. The output frequency is selected by the FSEL pin. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements. VCO frequency programming resolution is 218Hz and better Factory-programmable VCXO pull range and control voltage polarity One 2.5V or 3.3V LVPECL clock output FSEL control input for frequency selection, LVCMOS/LVTTL compatible RMS phase jitter @ 622.08MHz (50kHz - 80MHz): 0.47ps (typical) 2.5V or 3.3V supply voltage -40°C to 85°C ambient operating temperature Lead-free (RoHS 6) 6-lead ceramic 5mm x 7mm x 1.55mm package Block Diagram Pin Assignment PFD & LPF ÷P OSC FemtoClock® NG VCO 1950-2600MHz Q nQ ÷N 114.285 MHz 2 A/D VC FSEL Pulldown ÷MINT, MFRAC 9 7 23 VC 1 6 VCC FSEL 2 5 nQ VEE 3 4 Q IDT8N3DV85 6-lead ceramic 5mm x 7mm x 1.55mm package body CD Package Top View Configuration Register (ROM) (Frequency, Pull range, Polarity) IDT8N3DV85CCD REVISION A OCTOBER 30, 2013 1 ©2013 Integrated Device Technology, Inc. IDT8N3DV85 Data Sheet LVPECL DUAL-FREQUENCY PROGRAMMABLE VCXO Pin Description and Characteristic Tables Table 1. Pin Descriptions Number Name Type Description 1 VC Input 2 FSEL Input 3 VEE Power Negative power supply. 4, 5 Q, nQ Output Differential clock output. LVPECL interface levels. 6 VCC Power Positive power supply. VCXO Control Voltage input. Pulldown Frequency select pin. See Table 3A for function. LVCMOS/LVTTL  interface levels. NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values. Table 2. Pin Characteristics Symbol Parameter CIN Input Capacitance RPULLDOWN Test Conditions Minimum Typical Maximum Units FSEL 5.5 pF VC 10 pF Input Pulldown Resistor 50 k IDT8N3DV85CCD REVISION A OCTOBER 30, 2013 2 ©2013 Integrated Device Technology, Inc. IDT8N3DV85 Data Sheet LVPECL DUAL-FREQUENCY PROGRAMMABLE VCXO Function Tables Table 3A. Frequency Selection Input FSEL Operation 0 (default) Frequency 0 1 Frequency 1 NOTE: Frequency 0 and 1 are factory-programmed by IDT. Any frequency combination within the available frequency range can be ordered. For order information, see FemtoClock NG Ceramic-Package XO and VCXO Ordering Product Information document. . Table 3B. Output Frequency Range 15.476MHz to 866.67MHz 975MHz to 1,300MHz NOTE: Supported output frequency range. The output frequency can be programmed to any frequency in this range and to a precision of 218Hz or better. IDT8N3DV85CCD REVISION A OCTOBER 30, 2013 3 ©2013 Integrated Device Technology, Inc. IDT8N3DV85 Data Sheet LVPECL DUAL-FREQUENCY PROGRAMMABLE VCXO Principles of Operation Frequency Configuration The block diagram consists of the internal 3rd overtone crystal and oscillator which provide the reference clock fXTAL of 114.285MHz. The PLL includes the FemtoClock® VCO along with the Pre-divider (P), the feedback divider (M) and the post divider (N). The P, M, and N dividers determine the output frequency based on the fXTAL reference. The feedback divider is fractional supporting a huge number of output frequencies. Internal registers are used to hold up to two different factory pre-set configuration settings. The configuration is selected via the FSEL pin. Changing the FSEL control results in an immediate change of the output frequency to the selected register values. The P, M, and N frequency configurations support an output frequency range 15.476MHz to 866.67MHz and 975MHz to 1,300MHz. An order code is assigned to each frequency configuration and the VCXO pull-range programmed by the factory (default frequencies). For more information on the available default frequencies and order codes, please see the Ordering Information Section in this document. For available order codes, see the FemtoClock NG Ceramic-Package XO and VCXO Ordering Product Information document. For more information on programming capabilities of the device for custom frequency and pull-range configurations, see the FemtoClock NG Ceramic 5x7 Module Programming Guide. The devices use the fractional feedback divider with a delta-sigma modulator for noise shaping and robust frequency synthesis capability. The relatively high reference frequency minimizes phase noise generated by frequency multiplication and allows more efficient shaping of noise by the delta-sigma modulator. The output frequency is determined by the 2-bit pre-divider (P), the feedback divider (M) and the 7-bit post divider (N). The feedback divider (M) consists of both a 7-bit integer portion (MINT) and an 18-bit fractional portion (MFRAC) and provides the means for high-resolution frequency generation. The output frequency fOUT is calculated by: 1 MFRAC + 0.5 f OUT = f XTAL  ------------  MINT + ------------------------------------PN 18 2 (1) Table 3A. Frequency Selection Input FSEL Selects 0 (default) Frequency 0 1 Frequency 1 IDT8N3DV85CCD REVISION A OCTOBER 30, 2013 4 ©2013 Integrated Device Technology, Inc. IDT8N3DV85 Data Sheet LVPECL DUAL-FREQUENCY PROGRAMMABLE VCXO Absolute Maximum Ratings NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Item Rating Supply Voltage, VCC 3.71V Inputs, VI -0.5V to VCC + 0.5V Outputs, IO  Continuous Current Surge Current 50mA 100mA Package Thermal Impedance, JA 49.4C/W (0 mps) Storage Temperature, TSTG -65C to 150C  DC Electrical Characteristics Table 4A. Power Supply DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = -40°C to 85°C Symbol Parameter VCC Power Supply Voltage IEE Power Supply Current Test Conditions Minimum Typical Maximum 3.135 Units 3.3 3.465 V 130 160 mA Typical Maximum Units Table 4B. Power Supply DC Characteristics, VCC = 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C Symbol Parameter VCC Power Supply Voltage IEE Power Supply Current Test Conditions Minimum 2.375 2.5 2.625 V 120 155 mA Typical Maximum Units Table 4C. LVPECL DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = -40°C to 85°C Symbol Parameter Test Conditions Minimum VOH Output High Voltage; NOTE 1 VCC – 1.4 VCC – 0.9 V VOL Output Low Voltage; NOTE 1 VCC – 2.0 VCC – 1.7 V VSWING Peak-to-Peak Output Voltage Swing 0.6 1.0 V Maximum Units NOTE 1: Outputs terminated with 50 to VCC – 2V. Table 4D. LVPECL DC Characteristics, VCC = 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C Symbol Parameter Test Conditions Minimum Typical VOH Output High Voltage; NOTE 1 VCC – 1.4 VCC – 0.9 V VOL Output Low Voltage; NOTE 1 VCC – 2.0 VCC – 1.5 V VSWING Peak-to-Peak Output Voltage Swing 0.4 1.0 V NOTE 1: Outputs terminated with 50 to VCC – 2V. IDT8N3DV85CCD REVISION A OCTOBER 30, 2013 5 ©2013 Integrated Device Technology, Inc. IDT8N3DV85 Data Sheet LVPECL DUAL-FREQUENCY PROGRAMMABLE VCXO Table 4E. LVCMOS/LVTTL DC Characteristic, VCC = 3.3V ± 5% or 2.5V ± 5%, VEE = 0V, TA = -40°C to 85°C Symbol Parameter Test Conditions Minimum Maximum Units VCC = 3.3V 2 VCC + 0.3 V VCC = 2.5V 1.7 VCC + 0.3 V VCC = VIN = 3.465V -0.3 0.7 V VCC = VIN = 2.5V -0.3 VIH Input High Voltage VIL Input Low Voltage IIH Input High Current FSEL VCC = VIN = 3.465V or 2.625V IIL Input Low Current FSEL VCC = 3.465V or 2.625V, VIN = 0V IDT8N3DV85CCD REVISION A OCTOBER 30, 2013 6 -5 Typical 0.7 V 150 µA µA ©2013 Integrated Device Technology, Inc. IDT8N3DV85 Data Sheet LVPECL DUAL-FREQUENCY PROGRAMMABLE VCXO AC Electrical Characteristics Table 5A. AC Characteristics, VCC = 3.3V ± 5% or 2.5V ± 5%, TA = -40°C to 85°C Symbol Parameter fOUT Output Frequency Q, nQ fI Initial Accuracy fS fA fT Temperature Stability Test Conditions Minimum Typical Maximum Units 15.476 866.67 MHz 975 1,300 MHz Measured @ 25°C, VC = VCC/2 ±10 ppm Option code = A or B ±100 ppm Option code = E or F ±50 ppm Option code = K or L ±20 ppm Frequency drift over 10 year life ±3 ppm Frequency drift over 15 year life ±5 ppm Option code A, B (10 year life) ±113 ppm Option code E, F (10 year life) ±63 ppm Option code K, L (10 year life) ±33 ppm 6 12 ps 2 3 ps Aging Total Stability tjit(cc) Cycle-to-Cycle Jitter; NOTE 1 622.08MHz tjit(per) RMS Period Jitter tjit(Ø) RMS Phase Jitter (Random); NOTE 2 622.08MHz, Integration Range: 12kHz - 20MHz 0.46 0.71 ps tjit(Ø) RMS Phase Jitter (Random); NOTE 2 622.08MHz, Integration Range: 50kHz - 80MHz 0.47 0.72 ps 500MHz