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Datasheet LM4985TM/NOPB - Texas Instruments Audio Amplifiers

Part Number: LM4985TM/NOPB

Manufacturer: Texas Instruments

Description: Audio Amplifiers

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LM4985, LM4985TMEVAL SNAS346B MAY 2006 REVISED MAY 2006 LM4985 Stereo 135mW Low Noise Headphone Amplifier with Selectable Capacitively Coupled or Output Capacitor-less (OCL) Output and Digitally Controlled (I2C) Volume Control
Check for Samples: LM4985, LM4985TMEVAL
1 FEATURES OCL or capacitively coupled outputs (patent pending) I2C Digitally Controlled Volume Control Available in space-saving 0.4mm lead-pitch micro SMD package Volume control range: 76dB to +18dB Ultra low current shutdown mode 2 2.3V - 5.5V operation Ultra low noise APPLICATIONS Mobile Phones PDAs Portable electronics devices MP3 Players DESCRIPTION
The LM4985 is a stereo audio power amplifier with internal digitally controlled volume control. This amplifier is capable of delivering 68mWRMS per channel into a 16 load or 38mWRMS per channel into a 32 load at 1% THD when powered by a 3.6V power supply and operating in the OCL mode. Boomer audio power amplifiers were designed specifically to provide high


  • Audio Load Resistance: 32 Ohm
  • Available Set Gain: 18 dB
  • Input Signal Type: Single
  • Mounting Style: SMD/SMT
  • Operating Supply Voltage: 3 V, 5 V
  • Operating Temperature Range: - 40 C to + 85 C
  • Output Power: 135 mW
  • Output Signal Type: Differential, Single
  • Output Type: 2-Channel Stereo
  • Package / Case: uSMD
  • Packaging Type: Reel
  • Product: Class-AB
  • Supply Type: Single
  • Supply Voltage Range: 2.3 V to 5.5 V
  • THD plus Noise: 0.08 %, 0.01 %
  • RoHS: Yes

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