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U427

Siliconix
Part Number U427
Manufacturer Siliconix
Description monolithic dual n-channel JFET
Published Sep 21, 2019
Detailed Description monolithic dual n-channel JFETs designed for • • • • Very High Input Impedance DiHerential Amplifiers Electrometers • Im...
Datasheet PDF File U427 PDF File

U427
U427

Overview
monolithic dual n-channel JFETs designed for • • • • Very High Input Impedance DiHerential Amplifiers Electrometers • Impedance Converters Performance Curves NNT See Section 4 BENEFITS H --Siliconix • High Input Impedance IG = 5 pA (U427) • High Gain 9fs = 120 Mmho Minimum @ 10 = 30 MA • Low Power Supply Operation VGS(off} = 2 V Maximum (U427) • Minimum System Error and Calibration 25 mV Maximum Offset ABSOLUTE MAXIMUM RATINGS (25°C) TO-78 Saa Section 6 Gate-to-Gate Voltage Gate-Drain or Gate-Source Voltage Gate Current =Device Dissipation (Each Side), T A 25°C ±40V -40 V 10 mA ~~G, G2 (Derate 3.
2 mW;oC to 150°C) .
400mW 8, 82 =Total Device Dissipation, T A 25° C (Derate 6.
0 mW;oC to 150°C) Storage Temperature Range 750mW -65 to +150°C ELECTRICAL CHARACTERISTICS (25°C unless otherwise noted) c S2 405 °2 o 0, G1 b 0 G2 '0 7 01 ,0 S, Bottom View A , 02 0, ~, Characteristic 1 I- 2 1- 3S T I-A 4T I ISc -6 7 BVGSS BVG1G2 IGSS IG VGSlottl VGS lOSS Gate-Source Breakdown Voltage Gate-Gate Breakdown Voltage Gate Reverse Current (Note 1) Gate Operating Current (Note 1) Gate-Source Cutoff Voltage Gate-Source Voltage Saturation Dram Current U427 U428 M,n Typ Max M,n Typ Max -40 -60 -40 -60 ±40 ±40 5 10 5 10 35 35 -0.
4 -20 -0.
4 -3,0 -1.
8 -2.
9 60 1000 60 800 Unit V pA nA pA nA V /J.
A Test Conditions IG = -1 /J.
A, VOS = 0 IG = -1 /J.
A, 10 = O.
IS = 0 T = +2SOC T - + 12SoC VGS = -20 V.
VOS = 0 T "" +25°C T-+12SoC VOG= 10V,10=30/J.
A VDS= 10V.
IO "" 1 nA VOG = 10 V.
10 = 30/J.
A VOS=10V,VGS=0 -8 9 -0 10 y 9ts 90S CISS Common-Source Forward Transconductance Common-Source Output Conductance Common-Source Input Capacitance 300 -_--A" N Crss 9"_12IM 13 C 90S -- 14 - en 15 NF Common-Source Reverse Transfer Capacitance Common-Source Forward Transconductance 120 Common-Source Output Conductance EqUivalent Short Circuit Input NOise Voltage Noise Figure 16 M -A 17 T C -H lB IVGSI - VGS21 IVGSI - VGS21 LIT CMRR Differential Gate...


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