LSU404 LOW NOISE, LOW DRIFT MONOLITHIC DUAL N-CHANNEL JFET Linear Systems replaces discontinued Siliconix U404 with LSU404 The U404/ LSU404 is a Low Noise, Low Drift, Monolithic Dual N-Channel JFET The LSU404 is a high-performance monolithic dual JFET featuring extremely low noise, tight offset voltage and low drift over temperature specifications, and is targeted for use in a wide range of precision instrumentation applications. The LSU404 features a 5mV offset and 10-µV/°C drift. The LSU404 is a direct replacement for discontinued Siliconix U404. The hermetically sealed TO-71 & TO-78 packages are well suited for military applications. The 8 Pin P-DIP and 8 Pin SOIC provide ease of manufacturing, and the symmetrical pinout prevents improper orientation. (See Packaging Information). U404 / LSU404 Applications: Wideband Differential Amps High-Speed,Temp-Compensated Single-Ended Input Amps High-Speed Comparators Impedance Converters and vibrations detectors. ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted) SYMBOL CHARACTERISTICS MIN. BVGSS Breakdown Voltage 50 BVGGO Gate‐To‐Gate Breakdown ±50 TRANSCONDUCTANCE YfSS Full Conduction 2000 YfS Typical Operation 1000 |YFS1‐2 / Y FS| Mismatch ‐‐ DRAIN CURRENT IDSS Full Conduction 0.5 |IDSS1‐2 / IDSS| Mismatch at Full Conduction ‐‐ GATE VOLTAGE VGS(off) or Vp Pinchoff voltage ‐0.5 VGS(on) Operating Range ‐‐ GATE CURRENT ‐IGmax. Operating ‐‐ ‐IGmax. High Temperature ‐‐ ‐IGSSmax. At Full Conduction ‐‐ ‐IGSSmax. High Temperature 5 OUTPUT CONDUCTANCE YOSS Full Conduction ‐‐ YOS Operating ‐‐ COMMON MODE REJECTION CMR ‐20 log | V GS1‐2/ V DS| 95 NOISE NF Figure ‐‐ en Voltage ‐‐ CAPACITANCE CISS Input ‐‐ CRSS Reverse Transfer ‐‐ Note 1 – These ratings are limiting values above which the serviceability of any semiconductor may be impaired Available Packages: FEATURES LOW DRIFT LOW NOISE LOW PINCHOFF ABSOLUTE MAXIMUM RATINGS @ 25°C (unless otherwise noted) | V GS1‐2 / T| = 10µV/°C TYP. en = 6nV/Hz @ 10Hz TYP. Vp = 2.5V TYP. Maximum Temperatures Storage Temperature ‐65°C to +150°C Operating Junction Temperature +150°C Maximum Voltage and Current for Each Transistor – Note 1 ‐VGSS Gate Voltage to Drain or Source 50V ‐VDSO Drain to Source Voltage 50V ‐IG(f) Gate Forward Current 10mA Maximum Power Dissipation Device Dissipation @ Free Air – Total 300mW MATCHING CHARACTERISTICS @ 25°C UNLESS OTHERWISE NOTED SYMBOL CHARACTERISTICS VALUE UNITS CONDITIONS | V GS1‐2 / T| max. DRIFT VS. 25 µV/°C VDG=10V, ID=200µA TEMPERATURE TA=‐55°C to +125°C | V GS1‐2 | max. OFFSET VOLTAGE 15 mV VDG=10V, ID=200µA TYP. 60 ‐‐ ‐‐ ‐‐ 0.6 ‐‐ 1 ‐‐ ‐‐ ‐4 ‐‐ ‐‐ 5 ‐‐ 0.2 ‐‐ ‐‐ 20 ‐‐ ‐‐ MAX. ‐‐ ‐‐ 7000 2000 3 10 5 ‐2.5 ‐2.3 ‐15 ‐10 100 5 20 2 ‐‐ 0.5 ‐‐ 8 1.5 UNITS V V µmho µmho % mA % V V pA nA pA pA µmho µmho dB dB nV/Hz pF pF TO-71 / TO-78 (Top View) CONDITIONS VDS = 0 ID=1nA I G= 1nA ID= 0 IS= 0 VDG= 10V VGS= 0V f = 1kHz VDG= 15V ID= 200µA f = 1kHz VDG= 10V VGS= 0V VDS= 15V ID= 1nA VDS=15V ID=200µA VDG= 15V ID= 200µA TA= +125°C VDS =0 VDG= 15V TA= +125°C VDG= 10V VGS= 0V VDG= 15V ID= 500µA VDS = 10 to 20V ID=30µA VDS= 15V VGS= 0V RG= 10M f= 100Hz NBW= 6Hz VDS=15V ID=200µA f=10Hz NBW=1Hz VDS= 15V ID= 200µA f= 1MHz P-DIP / SOIC (Top View) U404 / LSU404 in TO-71 & TO-78 U404 / LSU404 in PDIP & SOIC U404 / LSU404 available as bare die Please contact Micross for full package and die dimensions Micross Components Ltd, United Kingdom, Tel: +44 1603 788967, Fax: +44 1603788920, Email: [email protected] Web: www.micross.com/distribution.aspx