ssm2212

Manufacturer Part Numberssm2212
DescriptionAudio, Dual-matched Npn Transistor Ssm2212
ManufacturerAnalog Devices, Inc.
ssm2212 datasheet
 


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FEATURES
Very low voltage noise: 1 nV/√Hz maximum @ 100 Hz
Excellent current gain match: 0.5%
Low offset voltage (V
): 200 μV maximum
OS
Outstanding offset voltage drift: 0.03 μV/°C
High gain bandwidth product: 200 MHz
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
typically 28 Ω) and high current gain (h
at I
= 1 mA), the SSM2212 can achieve outstanding signal-to-
C
noise ratios. The high current gain results in superior
performance compared to systems incorporating commercially
available monolithic amplifiers.
Excellent matching of the current gain (Δh
low V
of less than 10 μV typical make the SSM2212 ideal for
OS
symmetrically balanced designs, which reduce high-order
amplifier harmonic distortion.
B
Rev.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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.
typically exceeds 600
The SSM2212 is also an ideal choice for accurate and reliable
FE
current biasing and mirroring circuits. Furthermore, because a
current mirror’s accuracy degrades exponentially with mismatches
of V
BE
does not need offset trimming in most circuit applications.
) to about 0.5% and
The SSM2212 performance and characteristics are guaranteed
FE
over the extended temperature range of −40°C to +85°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Audio, Dual-Matched
NPN Transistor
SSM2212
PIN CONFIGURATION
C
C
1
8
1
2
B
B
2
7
1
2
E
E
3
6
1
2
SSM2212
NIC
NIC
4
5
NIC = NO INTERNAL CONNECTION
Figure 1. 8-Lead SOIC_N
between transistor pairs, the low V
of the SSM2212
OS
2010
©
Analog Devices, Inc. All rights reserved.
www.analog.com

ssm2212 Summary of contents

  • Page 1

    ... The high current gain results in superior performance compared to systems incorporating commercially available monolithic amplifiers. Excellent matching of the current gain (Δh low V of less than 10 μV typical make the SSM2212 ideal for OS symmetrically balanced designs, which reduce high-order amplifier harmonic distortion. B Rev ...

  • Page 2

    ... SSM2212 TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration............................................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 4 REVISION HISTORY 7/10—Rev Rev. B Changes to Figure 1.......................................................................... 1 6/10—Rev Rev. A Changes to Fast Logarithmic Amplifier Section .......................... 8 6/10—Revision 0: Initial Version   Thermal Resistance .......................................................................4   ESD Caution...................................................................................4   ...

  • Page 3

    ... 0.08 trimmed 0. 200 ≤ +85° 0.05 23 0.3 35 SSM2212 Max Unit nV/√Hz 1 nV/√Hz 1 nV/√Hz 1 nV/√Hz μV p-p 200 μV 220 μV 50 μV 70 μV 1 μV/°C 0.3 μV/°C V MHz 500 pA nA ...

  • Page 4

    ... SSM2212 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Breakdown Voltage of Collector-to-Base Voltage (BV ) CBO Breakdown Voltage of Collector-to-Emitter Voltage (BV ) CEO Breakdown Voltage of Collector-to-Collector Voltage ( Breakdown Voltage of Emitter-to-Emitter Voltage ( Collector Current ( Emitter Current ( Storage Temperature Range Operating Temperature Range ...

  • Page 5

    ... TEMPERATURE (°C) Figure 6. Current Gain vs. Temperature (Excludes I 0.70 0.65 0.60 0. 0.50 0.45 0.40 0.35 0.30 0.001 0.01 0.1 COLLECTOR CURRENT, I (mA) C Figure 7. Base Emitter Voltage vs. Collector Current SSM2212 = +125° 1µA 100 150 ) CBO 1 10 ...

  • Page 6

    ... SSM2212 100 0.1 0.01 0.001 0.001 0.01 0.1 COLLECTOR CURRENT, I Figure 8. Small Signal Input Resistance vs. Collector Current 1m 0.1m 0.01m 1µ 0.1µ 0.01µ 0.001 0.01 0.1 1 COLLECTOR CURRENT, I Figure 9. Small Signal Output Conductance vs. Collector Current 100 T = –55° +25° 0.1 0.01 0 0.1 0.2 0.3 0.4 0.5 SATURATION VOLTAGE, V Figure 10 ...

  • Page 7

    ... TEMPERATURE (°C) Figure 14. Collector-to-Collector Leakage Current vs. Temperature 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 100 125 Figure 15. Collector-to-Collector Capacitance vs. Reverse Bias Voltage Rev Page REVERSE BIAS VOLTAGE (V) SSM2212 5 0 ...

  • Page 8

    ... APPLICATIONS INFORMATION FAST LOGARITHMIC AMPLIFIER The circuit of Figure modification of a standard logarithmic amplifier configuration. Running the SSM2212 at 2.5 mA per side (full-scale) allows for a fast response with a wide dynamic range. The circuit has a 7 decade current range and a 5 decade voltage range, and it is capable of 2.5 μs settling time to 1% with step ...

  • Page 9

    ... Figure 17. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) Package Description 8-Lead Standard Small Outline Package [SOIC_N] 8-Lead Standard Small Outline Package [SOIC_N] 8-Lead Standard Small Outline Package [SOIC_N] Rev Page SSM2212 0.50 (0.0196) 45° 0.25 (0.0099) 1.27 (0.0500) 0.40 (0.0157) Package Option R-8 R-8 ...

  • Page 10

    ... SSM2212 NOTES Rev Page ...

  • Page 11

    ... NOTES Rev Page SSM2212 ...

  • Page 12

    ... SSM2212 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09043-0-7/10(B) Rev Page ...