LS840_TO-71

LS840 MONOLITHIC DUAL N-CHANNEL JFET Linear Systems Ultra Low Leakage Low Drift Monolithic Dual JFET The LS840 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 LS840 features a 25mV offset and 20-µV/°C drift. The hermetically sealed TO-71 & TO-78 packages are well suited for military and harsh environment applications. (See Packaging Information). FEATURES  LOW DRIFT  | V GS1‐2 / T| ≤5µV/°C  LOW LEAKAGE  IG = 10pA TYP.  LOW NOISE  en = 8nV/√Hz TYP.  LOW OFFSET VOLTAGE  | V GS1‐2|= 2mV TYP.  ABSOLUTE MAXIMUM RATINGS @ 25°C (unless otherwise noted)  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  60V  ‐VDSO  Drain to Source Voltage  60V  ‐IG(f)  Gate Forward Current  50mA  Maximum Power Dissipation  Device Dissipation @ Free Air – Total                 400mW @ +125°C    MATCHING CHARACTERISTICS @ 25°C UNLESS OTHERWISE NOTED SYMBOL  CHARACTERISTICS  VALUE  UNITS  CONDITIONS  | V GS1‐2 / T| max.  DRIFT VS.  5  µV/°C  VDG=20V, ID=200µA  TEMPERATURE  TA=‐55°C to +125°C  | V GS1‐2 | max.  OFFSET VOLTAGE  5  mV  VDG=20V, ID=200µA  TYP.  60  ‐‐    ‐‐  ‐‐  0.6    2  1    2  ‐‐    10  ‐‐  5  ‐‐    ‐‐  0.1  0.01    100  75    ‐‐  ‐‐  ‐‐    4  1.2  0.1  MAX.  ‐‐  ‐‐    4000  1000  3    5  5    4.5  4    50  50  ‐‐  100    10  1  0.1    ‐‐  ‐‐    0.5  10  15  10  5  ‐‐  UNITS  V  V    µmho  µmho  %    mA  %    V  V    pA  nA  pA  pA    µmho  µmho  µmho    dB  CONDITIONS  VDS = 0                  ID=1nA        I G= 1nA               ID= 0               IS= 0    VDG= 20V         VGS= 0V      f = 1kHz       VDG= 20V         ID= 200µA          VDG= 20V              VGS= 0V      VDS= 20V               ID= 1nA                VDS=20V                 ID=200µA    VDG= 20V ID= 200µA  TA= +125°C   VDG = 10V ID= 200µA  VDG= 20V , VDS =0    VDG= 20V              VGS= 0V  VDG=  20V            ID= 200µA  LS840 Applications: Wideband Differential Amps High-Speed,Temp-Compensated SingleEnded Input Amps High-Speed Comparators Impedance Converters and vibrations detectors. ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted) SYMBOL  CHARACTERISTICS  MIN.  BVGSS  Breakdown Voltage  60  BVGGO  Gate‐To‐Gate Breakdown  60    TRANSCONDUCTANCE    YfSS  Full Conduction  1000  YfS  Typical Operation  500  |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  1  VGS(on)  Operating Range  0.5  GATE CURRENT      ‐IGmax.  Operating  ‐‐  ‐IGmax.  High Temperature  ‐‐  ‐IGmax.  Reduced VDG  ‐‐  ‐IGSSmax.  At Full Conduction  ‐‐  OUTPUT CONDUCTANCE      YOSS  Full Conduction  ‐‐  YOS  Operating  ‐‐  |YOS1‐2|  Differential  ‐‐    COMMON MODE REJECTION    CMR  ‐20 log | V GS1‐2/ V DS|  ‐‐  ‐20 log | V GS1‐2/ V DS|  ‐‐    NOISE    NF  Figure  ‐‐  en  Voltage  ‐‐  ‐‐    CAPACITANCE    CISS  Input  ‐‐  CRSS  Reverse Transfer  ‐‐  CDD  Drain‐to‐Drain  ‐‐  Click To Buy   dB  nV/√Hz      pF      ∆VDS = 10 to 20V        ID=200µA  ∆VDS = 5 to 10V        ID=200µA  VDS= 20V      VGS= 0V       RG= 10MΩ  f= 100Hz           NBW= 6Hz  VDS=20V   ID=200µA  f=1KHz NBW=1Hz  VDS=20V   ID=200µA  f=10Hz NBW=1Hz    VDS= 20V,   ID=200µA    Note 1 – These ratings are limiting values above which the serviceability of any semiconductor may be impaired TO-71 & TO-78 (Top View) Available Packages: LS840 / LS840 in TO-78 & TO-71 LS840 / LS840 available as bare die Please contact Micross for full package and die dimensions Tel: +44 1603 788967 Email: chipcomponents@micross.com Web: http://www.micross.com/distribution Information furnished by Linear Integrated Systems and Micross Components is believed to be accurate and reliable. However, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Linear Integrated Systems.