T H AT
Corporation
FEATURES
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4 Matched NPN Transistors (300)
4 Matched PNP Transistors (320)
2 Matched NPNs and PNPs (340)
4 Matched NP6N - 4 Matched PNP (380)
Monolithic Construction
Low Noise
- 0.75
nV Hz
(
PNP
)
- 0.8
nV Hz
(
NPN
)
High Speed
- f
T
= 350 MHz (NPN)
- f
T
= 325 MHz (PNP)
Excellent Matching 鈥?500
mV
typical
between devices of same gender
Dielectrically Isolated
36V V
CEO
Low-Noise Matched Transistor Array ICs
THAT 300 Series
APPLICATIONS
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Microphone Preamplifiers
Current Sources
Current Mirrors
Log/Antilog Amplifiers
Multipliers
Servos
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DESCRIPTION
The THAT300 Series ICs are large-geometry
monolithic NPN and/or PNP transistor arrays which
combine low noise, high speed and excellent para-
metric matching between devices of the same gender.
The large geometries typically result in 25
W
base
spreading resistance for the PNP devices (30
W
for
the NPNs), producing 0.75
nV Hz
voltage noise
(0.8
nV Hz
for the NPNs). This makes the 300
Series an ideal choice for low-noise amplifier input
stages.
Fabricated on a Complementary Bipolar Dielec-
trically Isolated process, each transistor is electri-
cally isolated from the others by a layer of insulating
oxide. The resulting low collector-to-substrate capac-
itance produces a typical NPN f
T
of 350 MHz,
325 MHz for the PNPs. This delivers ac performance
similar to discrete 2N3904- and 2N3906-class de-
vices. Dielectric isolation also minimizes crosstalk
and provides complete DC isolation.
Substrate biasing is not required for normal op-
eration, though the substrate should be grounded to
optimize speed and minimize inter-device crosstalk.
The monolithic construction assures excellent pa-
rameter matching and tracking over temperature.
Part Number
THAT300P
Configuration
4-Matched NPN Transistors
Package
DIP14
SO14
DIP14
THAT300S
THAT320P
4- Matched PNP Transistors
THAT320S
THAT340P
THAT340S
THAT380G
2 Matched NPN Transistors and
2 Matched PNP Transistors
4 Matched NPN Transistors and
4 Matched PNP Transistors
Table 1. Ordering Info
SO14
DIP14
SO14
Individual Die
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
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