Audio, Dual-Matched NPN Transistor Data Sheet MAT12 FEATURES PIN CONFIGURATION Very low voltage noise: 1 nV/Hz maximum at 100 Hz C 1 C Excellent current gain match: 0.5% typical 6 1 2 Low offset voltage (V ): 200 V maximum OS B 2 5 B 1 2 Outstanding offset voltage drift: 0.03 V/C typical High gain bandwidth product: 200 MHz E 3 4 E 1 2 NOTE 1. SUBSTRATE IS CONNECTED TO CASE ON TO-78 PACKAGE. 2. SUBSTRATE IS NORMALLY CONNECTED TO THE MOST NEGATIVE CIRCUIT POTENTIAL, BUT CAN BE FLOATED. Figure 1. 6-Lead TO-78 GENERAL DESCRIPTION The MAT12 is a dual, NPN-matched transistor pair that is degradation of beta and matching characteristics due to reverse specifically designed to meet the requirements of ultralow biasing of the base emitter junction. noise audio systems. The MAT12 is also an ideal choice for accurate and reliable With its extremely low input base spreading resistance (rbb current biasing and mirroring circuits. Furthermore, because is typically 28 ) and high current gain (h typically exceeds the accuracy of a current mirror degrades exponentially with FE 600 at IC = 1 mA), the MAT12 can achieve outstanding signal- mismatches of VBE between transistor pairs, the low VOS of to-noise ratios. The high current gain results in superior the MAT12 does not need offset trimming in most circuit performance compared to systems incorporating commercially applications. available monolithic amplifiers. The MAT12 is a good replacement for the MAT02, and its Excellent matching of the current gain (h ) to about 0.5% performance and characteristics are guaranteed over the FE and low V of less than 10 V typical make the MAT12 ideal extended temperature range of 40C to +85C. OS 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 Rev. A Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20102014 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com 09044-001MAT12 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Resistance .......................................................................4 Pin Configuration ............................................................................. 1 ESD Caution...................................................................................4 General Description ......................................................................... 1 Typical Performance Characteristics ..............................................5 Revision History ............................................................................... 2 Applications Information .................................................................8 Specifications ..................................................................................... 3 Fast Logarithmic Amplifier ..........................................................8 Electrical Characteristics ............................................................. 3 Outline Dimensions ....................................................................... 10 Absolute Maximum Ratings ............................................................ 4 Ordering Guide .......................................................................... 10 REVISION HISTORY 1/14Rev. 0 to Rev. A Change to Gain Bandwidth Product Parameter ........................... 3 7/10Revision 0: Initial Version Rev. A Page 2 of 12