Description
The THAT 300, 320 and 340 are large geometry, 4-transistor, monolithic NPN and/or PNP arrays. They exhibit both high speed and low noise, with excellent parameter matching between transistors of the same gender. Typical base-spreading resistance is 25 Ω for the PNP devices (30 Ω for the low-gain NPNs), so their resulting voltage noise is under 1 nV/√Hz. This makes the 300 series ideally suited for low-noise amplifier input stages, log amplifiers, and many other applications. The four-NPN transistor array is available in versions selected for hfe with minimums of 150 (300A) or 300 (300B).

FEATURES
• 4 Matched NPN Transistors
    º 300 typical hfe of 100
    º 300A minimum hfe of 150
    º 300B minimum hfe of 300
• 4 Matched PNP Transistors
    º 320 typical hfe of 75
• 2 Matched PNP and 2 Matched NPN Transistors
    º 340 PNP typical hfe of 75
    º 340 NPN typical hfe of 100
• Low Voltage Noise
    º 0.75 nV/ √Hz (PNP)
    º 0.8 nV/ √Hz (NPN)
• High Speed
    º fT = 350 MHz (NPN)
    º fT = 325 MHz (PNP)
• 500 μV matching between devices
• Dielectrically Isolated for low crosstalk and high DC isolation
• 36V VCEO

APPLICATIONS
• Low Noise Front Ends
• Microphone Preamplifiers
• Log/Antilog Amplifiers
• Current Sources
• Current Mirrors
• Multipliers