Databook.fxp 1/14/99 12:22 PM Page B-42 B-42 01/99 IFN424, IFN425, IFN426 Dual N-Channel Silicon Junction Field-Effect Transistor Absolute maximum ratings at TA = 25¡C ¥ Very High Impedance Differential Amplifiers ¥ Electrometers Device Dissapation (Derate 3.2 mW/°C to 50°C) Total Device Dissipation (Derate 6 mW/°C to 150 °C) Storage Temperature Range At 25°C free air temperature: IFN424, IFN425, IFN426 Static Electrical Characteristics Min Typ – 60 Gate Source Breakdown Voltage V(BR)GSS – 40 Gate to Gate Breakdown Voltage BVG1G2 ±40 Gate Reverse Current IGSS Gate Operating Current IG Gate Source Cutoff Voltage VGS(OFF) Gate Source Voltage VGS Drain Saturation Current (Pulsed) IDSS – 0.4 60 400 mW 750 mW – 60 °C to 200 °C Process NJ01 Max Unit Test Conditions V IG = – 1 µA, VDS = ØV V IG = – 1 µA, ID = ØA, IS = ØA –3 pA VGS = – 20V, VDS = ØV –3 nA VGS = – 20V, VDS = ØV – 0.5 pA VDS = 10V, ID = 30 µA – 500 pA VDS = 10V, ID = 30 µA –3 V VDS = 10V, ID = 1 nA – 2.9 V VDS = 10V, ID = 30 µA µA VDS = 10V, VGS = Ø V 1500 µS VDS = 10V, VGS = Ø V f = 1 kHz 1800 TA = +125°C TA = +125°C Dynamic Electrical Characteristics Common Source Forward Transconductance gfs 100 Common Source Output Conductance gos 3 µS VDS = 10V, ID = 30 µA f = 1 kHz Common Source Input Capacitance Ciss 3 pF VDS = 10V, VGS = Ø V f = 1 MHz 1.5 pF VDS = 10V, VGS = Ø V f = 1 MHz 70 nV/√Hz VDS = 10V, ID = 30 µA f = 10 Hz 1 dB VDS = 10V, ID = 30 µA RG = 1 MΩ f = 10 Hz mV VDG = 10V, ID = 30 µA Common Source Reverse Transfer Capacitance Crss Equivalent Short Circuit Input Noise Voltage e¯ N Noise Figure NF 20 Max - IFN424 IFN425 IFN426 Differential Gate Source Voltage |VGS1– VGS2| Differential Gate Source Voltage With Temperature |VGS1– VGS2| ∆T 10 10 15 25 25 40 µV/°C VDG = 10V, ID = 30 µA TA = – 55°C TB = 25°C TC = 125°C Min - IFN424 IFN425 IFN426 Common Mode Rejection Ratio CMRR 1000 N. Shiloh Road, Garland, TX 75042 (972) 487-1287 FAX (972) 276-3375 90 80 80 dB VDG = 10V to 20V, ID = 30 µA TOÐ78 Package Pin Configuration See Section G for Outline Dimensions 1 Source 1, 2 Drain 1, 3 Gate 1, 4 Case, 5 Source 2, 6 Drain 2, 7 Gate 2, 8 Omitted www.interfet.com