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...
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
us...