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CDCM6208V1FRGZR Datasheet(PDF) 10 Page - Texas Instruments |
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CDCM6208V1FRGZR Datasheet(HTML) 10 Page - Texas Instruments |
10 / 87 page ![]() CDCM6208V1F SCAS943 – MAY 2015 www.ti.com 8.10 Differential Input Characteristics (PRI_REF, SEC_REF) VDD_PRI, VDD_SEC = 1.71 V to 1.89 V, 2.375 V to 2.625 V, 3.135 V to 3.465 V, TA = –40°C TO 85°C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fIN Reference and Bypass Input Frequency 0.008 250 MHz VDD_PRI/SEC = 2.5/3.3 V 0.2 1.6 VPP Differential Input Voltage Swing, Peak-to- VI Peak VDD_PRI/SEC = 1.8 V 0.2 1 VPP VDD_PRI/V VDD_PRI/V VICM Input Common Mode Voltage CML input signaling, R4[7:6] = 00 DD_SEC- DD_SEC- V 0.4 0.1 LVDS, VDD_PRI/SEC = 1.8/2.5/3.3 V, VICM Input Common Mode Voltage 0.8 1.2 1.5 V R4[7:6] = 01, R4.1 = d.c., R4.0 = d.c. LVDS (Q4[7:6,4:3] = 01) 15 65 mVpp VHYST Input hysteresis CML (Q4[7:6,4:3] = 00) 20 85 mVpp IIH Input High Current VDD_PRI/SEC = 3.465 V, VIH = 3.465 V 30 µA IIL Input Low Current VDD_PRI/SEC = 3.465V, VIL = 0 V -30 µA ΔV/ΔT Reference Input Edge Rate 20% - 80% 0.75 V/ns IDCDIFF Reference Input Duty Cycle 30% 70% CIN Input Capacitance 2.7 pF 8.11 Crystal Input Characteristics (SEC_REF) VDD_SEC = 1.71 to 1.89 V, 2.375 V to 2.625 V, 3.135 V to 3.465 V,TA = –40°C to 85°C PARAMETER MIN TYP MAX UNIT MODE OF OSCILLATION FUNDAMENTAL See note (1) 10 30.72 MHz Frequency See note (2) 30.73 50 MHz 10 MHz 150(3) Equivalent Series Resistance (ESR) 25 MHz 70(4) Ω 50 MHz 30(5) 1.8 V / 3.3 V SEC_REFP 3.5 4.5 5.5 On-chip load capacitance 1.8 V SEC_REFN 5.5 7.25 8.5 pF 3.3 V SEC_REFN 6.5 7.34 8.5 Drive Level See note (6) 200 µW (1) Verified with crystals specified for a load capacitance of CL=8pF, the pcb related capacitive load was estimated to be 2.3pF, and completed with a load capacitors of 4pF on each crystal terminal connected to GND. XTALs tested: NX3225GA 10MHz EXS00A- CG02813 CRG, NX3225GA 19.44MHz EXS00A-CG02810 CRG, NX3225GA 25MHz EXS00A-CG02811 CRG, and NX3225GA 30.72MHz EXS00A-CG02812 CRG. (2) For 30.73 MHz to 50 MHz, it is recommended to verify sufficient negative resistance and initial frequency accuracy with the crystal vendor. The 50 MHz use case was verified with a NX3225GA 50MHz EXS00A-CG02814 CRG. To meet a minimum frequency error, the best choice of the XTAL was one with CL = 7pF instead of CL = 8pF. (3) With NX3225GA_10M the measured remaining negative resistance on the EVM is 6430 Ω (43 x margin) (4) With NX3225GA_25M the measured remaining negative resistance on the EVM is 1740 Ω (25 x margin) (5) With NX3225GA_50M the measured remaining negative resistance on the EVM is 350 Ω (11 x margin) (6) Maximum drive level measured was 145 µW; XTAL should at least tolerate 200 µW 10 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: CDCM6208V1F |
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