DESCRIPTION
THAT140 is a quad, large-geometry monolithic NPN/PNP transistor array which combines low noise, high speed and excellent parametric matching. The large geometries typically result in 25 Ω base spread ing resistance for the PNP devices (30 Ω for the NPNs), producing 0.75 nV Hz voltage noise (0.8 nV Hz for the NPNs). This makes these parts an ideal choice for low-noise amplifier input stages.
FEATURES
• Two Matched NPN Transistors
  Two Matched PNP Transistors
• Monolithic Construction
• Low Noise
    — 0.75 nV/ Hz (PNP)
    — 0.8 nV/ Hz (NPN)
• High Speed
    — ft= 350 MHz (NPN)
    — ft= 325 MHz (PNP)
• Excellent Matching - 500 μV typ
• Dielectrically Isolated
• 25 V VCEO

APPLICATIONS
• Microphone Preamplifiers
• Tape Head Preamplifiers
• Current Sources
• Current Mirrors
• Log/Antilog Amplifiers
• Multipliers