Low-Noise Matched

Transistor Array ICs

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

FEATURES

• 4 Matched NPN Transistors

• 4 Matched PNP Transistors

• 2 Matched PNP and 2 Matched NPN

Transistors

• Low Voltage Noise

º 0.75 nV/ √Hz (PNP)

º 0.8 nV/ √Hz (NPN)

• High Speed

• 500 μV matching between devices

• Dielectrically Isolated for low crosstalk

and high DC isolation

APPLICATIONS

• Low Noise Front Ends

• Microphone Preamplifiers

• Log/Antilog Amplifiers

• Current Sources

• Current Mirrors

• Multipliers

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

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

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

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).

Description

SO14

340S14-U

DIP14

2-Matched NPN Transistors and

2-Matched PNP Transistors

340P14-U

SO14

320S14-U

DIP14

4-Matched PNP Transistors

320P14-U

SO14

4-Matched NPN Transistors, Beta = 300 min.

300BS14-U

SO14

4-Matched NPN Transistors, Beta = 150 min.

300AS14-U

SO14

300S14-U

DIP14

4-Matched NPN Transistors, Beta = 60 min.

300P14-U

Package

Configuration

Part Number

Table 1. Ordering Information