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LM1971MX 데이터시트(PDF) 1 Page - Texas Instruments |
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LM1971MX 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 20 page LM1971 www.ti.com SNAS104B – FEBRUARY 1995 – REVISED APRIL 2013 LM1971 Overture™ Audio Attenuator Series Digitally Controlled 62 dB Audio Attenuator with/Mute Check for Samples: LM1971 1 FEATURES DESCRIPTION The LM1971 is a digitally controlled single channel 23 • 3-Wire Serial Interface audio attenuator fabricated on a CMOS process. • Mute Function Attenuation is variable in 1 dB steps from 0 dB to −62 • Click and Pop Free Attenuation Changes dB. A mute function disconnects the input from the output, providing over 100 dB of attenuation. • 8-Pin Plastic PDIP and SOIC Packages Available The performance of the device is exhibited by its ability to change attenuation levels without audible APPLICATIONS clicks or pops. In addition, the LM1971 features a low Total Harmonic Distortion (THD) of 0.0008%, and a • Communication Systems Dynamic Range of 115 dB, making it suitable for • Cellular Phones and Pagers digital audio needs. The LM1971 is available in both • Personal Computer Audio Control 8-pin plastic PDIP or SOIC packages. • Electronic Music (MIDI) The LM1971 is controlled by a TTL/CMOS compatible 3-wire serial digital interface. The active low LOAD • Sound Reinforcement Systems line enables the data input registers while the CLOCK • Audio Mixing Automation line provides system timing. Its DATA pin receives serial data on the rising edge of each CLOCK pulse, KEY SPECIFICATIONS allowing the desired attenuation setting to be selected. • Total Harmonic Distortion 0.0008 % (Typ) • Frequency Response > 200 kHz ( −3 dB) (Typ) • Attenuation Range (Excluding Mute) 62 dB (Typ) • Dynamic Range 115 dB (Typ) • Mute Attenuation 102 dB (Typ) Typical Application Figure 1. Typical Audio Attenuator Application Circuit 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 Overture is a trademark of dcl_owner. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 1995–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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