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THAT300

THAT
Part Number THAT300
Manufacturer THAT
Description Low-Noise Matched Transistor Array
Published Jul 11, 2008
Detailed Description FEATURES • 4 Matched NPN Transistors º 300 typical hfe of 100 º 300A minimum hfe of 150 º 300B minimum hfe of 300 • 4 Ma...
Datasheet PDF File THAT300 PDF File

THAT300
THAT300

Overview
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 Low-Noise Matched Transistor Array ICs THAT 300 Series APPLICATIONS • Low Noise Front Ends • Microphone Preamplifiers • Log/Antilog Amplifiers • Current Sources • Current Mirrors • Multipliers 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).
Fabricated in a dielectrically isolated, complementary bipolar process, each transistor is electrically insulated from the others by a layer of insulating oxide (not the reverse-biased PN junctions used in conventional arrays).
As a result, they exhibit inter-device crosstalk and DC isolation similar to that of discrete transistors.
The resulting low collector-to-substrate capacitance produces a typical NPN fT of 350 MHz (325 MHz for the PNPs).
Substrate biasing is not required for normal operation, though the substrate should be ac-grounded to optimize speed and minimize crosstalk.
An eight-transistor bare-die array with similar performance characteristics (the THAT 380G) is also available ...


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