THAT140 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – Quad Low-Noise NPN / PNP Transistor Array

THAT Corporation
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
— f_t= 350 MHz (NPN)
— f_t= 325 MHz (PNP)
· Excellent Matching - 500 mV typ
· Dielectrically Isolated
· 25 V V_CEO
Quad Low-Noise
NPN / PNP Transistor Array
THAT140
APPLICATIONS
· Microphone Preamplifiers
· Tape Head Preamplifiers
· Current Sources
· Current Mirrors
· Log/Antilog Amplifiers
· Multipliers
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 W base spread-
ing 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 these parts an
ideal choice for low-noise amplifier input stages.
Fabricated on a Complementary Bipolar Dielec-
trically Isolated process, all four transistors are elec-
trically isolated from each other by a layer of oxide.
The resulting low collector-to-substrate capacitance
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 devices.
Dielectric isolation also minimizes crosstalk and
provides complete DC isolation.
Substrate biasing is not required for normal oper-
ation, though the substrate should be grounded to
optimize speed. The monolithic construction assures
excellent parameter matching and tracking over tem-
perature.
14 13 ₁₂ 11 10 9 ⁸
Q2
NC
Q4
Q1
Q3
SUB
123456 7
Figure 1. Pin Configuration
THAT Corporation; 45 Sumner St., Milford, Massachusetts; 01757-1656; USA
Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com