1T397

1T397 Variable Capacitance Diode Description The 1T397 is a variable capacitance diode designed for the electronic tuning of wide band CATV tuners, and it has a super miniature package. Features • Super miniature package • Large capacitance ratio C2/C25=14.5 Min. C1/C28=21.5 Min. C25/C28=1.03 Min. • Small series resistance rs=1.1 Ω Max. • High reverse voltage VR=34 V Structure Silicon epitaxial planar-type diode M-235 Absolute Maximum Ratings (Ta=25 °C) • Reverse voltage VR 34 • Operating temperature Topr –20 to +75 • Storage temperature Tstg –65 to +150 V °C °C Electrical Characteristics Item Reverse current Reverse voltage Diode capacitance Symbol IR VR C2 C25 C2/C25 C1/C28 C25/C28 rs ∆C Conditions VR=28 V IR=1 µA VR=2 V, f=1 MHz VR=25 V, f=1 MHz Min. 34 42.9 2.60 14.5 21.5 1.03 Typ. Max. 10 51.0 3.03 15.5 (Ta=25 °C) Unit nA V pF pF Capacitance ratio Series resistance Capacitance deviation in a matching group CD=14 pF, f=470 MHz VR=1 to 28 V 1.1 2.0 Ω % Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E94610B83-TE 1T397 Diode capacitance vs. Reverse voltage temperature 100 Ta=25°C 50 1.000 Reverse current vs. Ambient temperature VR=28V C-Diode capacitance (pF) 20 10 5 2 IR Reverse current (nA) 1 2 5 10 20 50 VR - Reverse voltage temperature 0.100 1 0.010 0.001 –20 0 20 40 60 80 Ta - Ambient temperature (°C) Forward voltage vs. Ambient temperature 0.90 50 IF=1mA Reverse voltage vs. Ambient temperature IR=10µA VF Forward voltage (V) VR - Reverse voltage (V) 0.80 45 0.70 40 0.60 –20 35 0 20 40 60 80 Ta - Ambient temperature (°C) 30 -20 0 20 40 60 80 Ta - Ambient temperature (°C) —2— 1T397 Diode capacitance vs. Ambient temperature 1.03 VR=1V 1.02 VR=2V VR=7V VR=25V VR=15V C (25°C) C (Ta) 1.01 Diode capacitance 1.00 0.99 0.98 –20 0 20 40 60 80 Ta - Ambient temperature (°C) Reverse current vs. Reverse voltage Thermal coeffcient of diode capacitance vs. Reverse voltage 0.100 Thermal coeffcient of diode capacitance (ppm/°C) 1000 500 200 IR - Reverse current (nA) 0.010 Ta=80°C 100 50 1 2 5 10 20 50 Ta=60°C VR - Reverse voltage (V) 0.001 Ta=25°C 0.0001 1 2 5 10 20 50 VR - Reverse voltage(V) —3— 1T397 Package Outline Unit : mm M-235 + 0.2 ∗1.25 – 0.1 + 0.1 0.3 – 0.05 0.2 ∗0.9 ± 0.1 2 ∗1.7 ± 0.1 1 + 0.1 0.3 – 0.05 2.5 ± 0.2 0 ± 0.05 + 0.1 0.11 – 0.06 0° to 10° NOTE: Dimension “∗” does not include mold protrusion. SONY CODE EIAJ CODE JEDEC CODE M-235 PACKAGE WEIGHT 0.1g Marking CATHODE MARK 2 97 B Notes 1) B:Lot No.(Year and Month of manufacture) Year;Last one digit Month;A,B,C(for Oct. to Dec.) 1 to 9(for Jan.to Sept.) 1 —4—