SSM2220PZ

Overview

The SSM2220PZ is a dual, low noise, matched PNP transistor optimized for audio applications. It features an ultralow input voltage noise of typically 0.7 nV/√Hz across the 20 Hz to 20 kHz audio bandwidth. The device offers a high gain bandwidth of 190 MHz typical and a current gain (hFE) of 165 typical at IC = 1 mA. Tight gain matching is specified with a maximum ΔhFE of 3% at IC = 100 μA. The offset voltage is limited to 200 μV maximum at IC = 100 μA. Bulk resistance is typically 0.3 Ω, ensuring accurate logarithmic conformance. The component operates over an extended industrial temperature range of −40°C to +85°C.

Feature Summary

• Ultralow input voltage noise density suitable for demanding preamplifier circuits
• Tight current gain matching between paired transistors to reduce harmonic distortion
• Internal base-to-emitter protection diodes prevent breakdown-induced degradation
• Low bulk resistance ensures precise logarithmic performance

Applications

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

Procurement Notes

Verify the specific package option when ordering, as the SSM2220PZ denotes the 8-lead plastic dual in-line package. Confirm RoHS compliance status via the 'Z' suffix if required by assembly specifications. Ensure the operating environment remains within the specified -40°C to +85°C range to maintain guaranteed electrical characteristics. Cross-reference the datasheet revision C for the most current absolute maximum ratings and thermal resistance values before finalizing design integration.

Selection Notes

Select the SSM2220PZ when low voltage noise and tight gain matching are critical for audio signal integrity. The dual configuration simplifies differential stage design compared to discrete single transistors. Consider the 8-lead PDIP package for through-hole prototyping or applications requiring higher thermal resistance tolerance. Evaluate the 190 MHz gain bandwidth if high-frequency response beyond standard audio bands is required for the specific circuit topology.

Part Context

The SSM2220 series includes variants such as SSM2220S and SSM2220SZ, which utilize the 8-lead standard small outline package. The SSM2220PZ specifically refers to the 8-lead plastic dual in-line package variant. All versions share identical electrical specifications and are designed for the same audio and precision instrumentation applications. The 'Z' suffix indicates RoHS compliance across the product line.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided datasheet. Designers should evaluate other Analog Devices matched transistor pairs or industry-standard low-noise PNP duals based on pin compatibility and noise specifications.