huaxindianzi 2TS026000AP

This product is a 2520-4P 26.000MHz 9PF ±10PPM quartz crystal unit. Under standard atmospheric conditions, measurements and tests are conducted at an ambient temperature of 25 ± 10°C and relative humidity of 40%~70%; if results are in question, measurements shall be performed within an ambient temperature of 25 ± 2°C and relative humidity of 40%~70%. Electrical characteristics are measured using S&A 250B or equivalent equipment. The F-T curve of an AT-cut crystal can be modeled as a third-order polynomial F(T) = C3(T - T0)^3 + C2(T - T0)^2 + C1(T - T0) + C0, where C0 is ±10 ppm, C1 is -0.4 ~ -0.1 ppm/°C, C2 is -4.5×10^-4 ~ 4.5×10^-4 ppm/°C², and C3 is 8.5×10^-5 ~ 11.5×10^-5 ppm/°C³. Drive level dependency, GPS quality specifications, thermistor specifications, and other related content are also defined.

• Ambient temperature 25 ± 10°C, relative humidity 40%~70% under standard atmospheric conditions; when in doubt, ambient temperature 25 ± 2°C, relative humidity 40%~70%
• AT-cut crystal F-T curve modeled as third-order polynomial F(T) = C3(T - T0)^3 + C2(T - T0)^2 + C1(T - T0) + C0
• C0: ±10 ppm; C1: -0.4 ~ -0.1 ppm/°C; C2: -4.5×10^-4 ~ 4.5×10^-4 ppm/°C²; C3: 8.5×10^-5 ~ 11.5×10^-5 ppm/°C³
• Drive level dependency measurement points: 15 points above and below (29 data points total); ESR variation ratio (max - min)/min < 20%; bidirectional measurement repeatability (ESR2 - ESR1)/ESR1 < 10%
• Crystal perturbation specification 1 (residual frequency stability slope): residual slope shall be within ±50 ppb/°C under specified temperature variation conditions
• Crystal perturbation specification 2 (small orbit hysteresis 2): average peak-to-peak frequency difference calculated at nine temperature points under specified temperature cycling conditions