Low-Noise Matched
Transistor Array ICs
THAT 300 Series
FEATURES
APPLICATIONS
•4 Matched NPN Transistors
•Low Noise Front Ends
º 300 typical hfe of 100
º 300A minimum hfe of 150
º 300B minimum hfe of 300
•Microphone Preamplifiers
•Log/Antilog Amplifiers
•Current Sources
•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
•Current Mirrors
º fT = 350 MHz (NPN)
º fT = 325 MHz (PNP)
•500 μV matching between devices
•Dielectrically Isolated for low crosstalk
and high DC isolation
•Multipliers
•36V VCEO
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 transis-
tors 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 ampli-
fiers, and many other applications. The four-NPN
transistor array is available in versions selected for
hfe with minimums of 150 (300A) or 300 (300B).
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 opera-
tion, 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 from THAT Corporation. Please contact us
directly or through your local distributor for more
information. Military-grade temperature range
packages are available from TT Semiconductor (see
www.ttsemiconductor.com for more information).
Fabricated in a dielectrically isolated, comple-
mentary bipolar process, each transistor is electri-
cally insulated from the others by
a layer of
insulating oxide (not the reverse-biased PN junctions
Part Number
Configuration
4-Matched NPN Transistors, Beta = 60 min.
Package
DIP14
SO14
SO14
SO14
DIP14
SO14
DIP14
SO14
300P14-U
300S14-U
300AS14-U
300BS14-U
320P14-U
320S14-U
340P14-U
340S14-U
4-Matched NPN Transistors, Beta = 150 min.
4-Matched NPN Transistors, Beta = 300 min.
4-Matched PNP Transistors
2-Matched NPN Transistors and
2-Matched PNP Transistors
Table 1. Ordering Information
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
Copyright © 2010, THAT Corporation. Document 600041 Rev 02