Description

The SM222TF-AD is a dual low noise matched PNP transistor, specifically designed for audio applications. It offers ultra-low input voltage noise of only 0.7 nV/√Hz, over the audio bandwidth of 20 Hz to 20 kHz. With a gain bandwidth of 190 MHz and an offset voltage of only 200 μV maximum, it is an excellent choice for low noise preamplifier applications.

Specifications and features

• Product Category: IC Chips
• Transistor Type: PNP
• Noise Figure: 0.7 nV/√Hz
• Bandwidth: 190 MHz typical
• Gains at IC = 1 mA, 165 typical – matched with an extremely tight 3% maximum gain matching
• Logarithmic conformance: rBE = 0.3 Ω typical
• Offset voltage of only 200 μV maximum

Application Scenarios

The SM222TF-AD transistor is suitable for a variety of audio-related applications such as:

• Microphone preamplifiers
• Tape head preamplifiers
• Current sources and mirrors
• Low noise precision instrumentation
• Voltage controlled amplifiers/multipliers

Comparison

• Low voltage noise at 100 Hz, only 1 nV/√Hz maximum
• Low offset voltage of 200 μV maximum
• High gain bandwidth: 190 MHz typical
• Noise figure of only 0.7 nV/√Hz
• Outstanding logarithmic conformance (rBE = 0.3 Ω typical)
• Tight 3% maximum gain matching

As no disadvantages are mentioned, it suggests that the SM222TF-AD has no obvious disadvantages.