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SSM2142:  Balance Line Driver

Product Details


The SSM2142 is an integrated differential-output buffer amplifier that converts a single-ended input signal to a balanced output signal pair with high output drive. By utilizing low noise thermally matched thin film resistors and high slew rate amplifiers, the SSM2142 helps maintain the sonic quality of audio systems by eliminating power line hum, RF interference, voltage drops, and other externally generated noise commonly encountered with long audio cable runs. Excellent rejection of common-mode noise and offset errors is achieved by laser trimming of the onboard resistors, assuring high gain accuracy. The carefully designed output stage of the SSM2142 is capable of driving difficult loads, yielding low distortion performance despite extremely long cables or loads as low as 600 Ohm, and is stable over a wide range of operating conditions.

Based on a cross-coupled, electronically balanced topology, the SSM2142 mimics the performance of fully balanced transformer-based solutions for line driving. However, the SSM2142 maintains lower distortion and occupies much less board space than transformers while achieving comparable common-mode rejection performance with reduced parts count.

The SSM2142 in tandem with the SSM2141 differential receiver establishes a complete, reliable solution for driving and receiving audio signals over long cables. The SSM2141 features an Input Common-Mode Rejection Ratio of 100 dB at 60 Hz. Specifications demonstrating the performance of this typical system are included in the data sheet.

FEATURES and BENEFITS

  • Transformer-Like Balanced Output
  • Drives 10 V RMS Into a 600 Ω Load
  • Stable When Driving Large Capacitive Loads and Long
    Cables
  • Low Distortion
    0.006% typ 20 Hz–20 kHz, 10 V RMS into 600 Ω
  • High Slew Rate
    15 V/µs typ
  • Low Gain Error
    (Differential or Single-Ended); 0.7% typ
  • Outputs Short-Circuit Protected
  • Available In Space-Saving 8-Pin Mini-DIP Package
  • Low Cost

Functional Block Diagram for SSM2142

Documentation

Title Content Type File Type
SSM2142: Balanced Line Driver Data Sheet (Rev C, 05/2011) (pdf, 227 kB) Data Sheets PDF
AN-938: Digital and Analog Measurement Units for Digital CMOS Microphone Preamplifier ASICs  (pdf, 75 kB) Application Notes PDF
AN-211: The Alexander Current-Feedback Audio Power Amplifier  (pdf, 1154 kB) Application Notes PDF
Audio Processors, Amplifiers Deliver Complete HDTV Audio Subsystem
(EE Times, 10/1/2007)
Product Reviews HTML
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Product Reviews HTML
Analog Devices in Advanced TV Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

SSM2142 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
SSM2142PZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $2.92 $2.65 Y  Material Info PCN Purchase
SSM2142SZ Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $2.92 $2.65 Y  Material Info PCN Purchase
SSM2142SZ-REEL Status: Production 16 ld SOIC - Wide 16 Ind Reel, 1000 - $2.65 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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