SSM2212CPZ-R7

Overview

The SSM2212CPZ-R7 is a dual, NPN-matched transistor pair designed for ultralow noise audio systems. It features an extremely low input base spreading resistance (typically 28 Ω) and high current gain (hFE typically exceeds 600 at IC = 1 mA). The device offers excellent current gain matching of approximately 0.5% and low offset voltage (VOS), making it ideal for symmetrically balanced designs that reduce harmonic distortion. It operates over an extended temperature range of −40°C to +85°C and is housed in a 16-lead LFCSP package.

Feature Summary

• Very low voltage noise density with a maximum of 1 nV/√Hz at 100 Hz
• Excellent current gain match of 0.5% for superior symmetry
• Low offset voltage drift of 0.03 μV/°C when trimmed
• High gain bandwidth product of 200 MHz

Applications

• Fast logarithmic amplifiers requiring wide dynamic range
• Symmetrically balanced circuit designs to minimize distortion
• Accurate and reliable current biasing circuits
• Current mirroring applications where VBE mismatch affects accuracy

Procurement Notes

Verify the specific ordering suffix to confirm the package type and reel quantity. The CPZ suffix indicates the 16-lead Lead Frame Chip Scale Package. Confirm RoHS compliance status as indicated by the Z suffix in the official Analog Devices ordering guide before finalizing procurement specifications.

Selection Notes

Select this component when ultralow noise performance and precise transistor matching are critical requirements. The LFCSP package provides thermal advantages over SOIC variants but requires careful PCB layout for the exposed pad connection. Ensure the design accommodates the specified operating temperature range and voltage limits for optimal reliability.

Part Context

This part belongs to the SSM2212 series of dual matched NPN transistors. It is functionally equivalent to other SSM2212 variants but differs in packaging. The CPZ variant utilizes a 16-lead LFCSP form factor, distinct from the 8-lead SOIC options available within the same family.

Replacement Considerations

Direct substitutes include other SSM2212 variants such as SSM2212RZ or SSM2212RZ-R7, provided the pinout compatibility between the 16-lead LFCSP and 8-lead SOIC packages is addressed through redesign.