Audio, Dual-Matched

NPN Transistor

Data Sheet

SSM2212

Rev. C

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FEATURES

Very low voltage noise: 1 nV/√Hz maximum at 100 Hz

Excellent current gain match: 0.5%

Outstanding offset voltage drift: 0.03 μV/°C

High gain bandwidth product: 200 MHz

PIN CONNECTIONS

8

7

6

NIC

5

SSM2212

NOTES

1. NIC = NO INTERNAL CONNECTION.

Figure 1. 8-Lead SOIC_N

12

11

10

1

3

4

9

2

SSM2212

NIC

NIC

NIC

NOTES

1. NIC = NO INTERNAL CONNECTION.

Figure 2. 16-Lead LFCSP_WQ

GENERAL DESCRIPTION

The SSM2212 is a dual, NPN-matched transistor pair that is

specifically designed to meet the requirements of ultralow noise

audio systems.

With its extremely low input base spreading resistance (rbb' is

ratios. The high current gain results in superior performance

compared to systems incorporating commercially available

monolithic amplifiers.

ideal for symmetrically balanced designs, which reduce high-

order amplifier harmonic distortion.

Stability of the matching parameters is guaranteed by protection

diodes across the base-emitter junction. These diodes prevent

degradation of beta and matching characteristics due to reverse

biasing of the base-emitter junction.

The SSM2212 is also an ideal choice for accurate and reliable

current biasing and mirroring circuits. Furthermore, because

the accuracy of a current mirror degrades exponentially with

SSM2212 does not need offset trimming in most circuit

applications.

The SSM2212 SOIC performance and characteristics are

guaranteed over the extended temperature range of −40°C to

+85°C.

The SSM2212 is available in 8-lead SOIC and 16-lead LFCSP

packages.