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NJU8721

Features: `Stereo Headphone Power Amplifier : 50mW+50mW `Sixth-order 32fS Over Sampling ∆ & PWM `Internal 8fS Over Sampling Digital Filter `Sampling Frequency : 96kHz (Max.) `De-Emphasis : 32kHz, 44.1kHz, 48kHz `System Clock : 256fS `Digital Processing : Attenuator 107step, LOG Curve: M...

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SeekIC No. : 004434590 Detail

NJU8721: Features: `Stereo Headphone Power Amplifier : 50mW+50mW `Sixth-order 32fS Over Sampling ∆ & PWM `Internal 8fS Over Sampling Digital Filter `Sampling Frequency : 96kHz (Max.) `De-Emphasis ...

NJU8721 Data Sheet

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Part Number:
NJU8721
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

`Stereo Headphone Power Amplifier
                                 : 50mW+50mW
`Sixth-order 32fS Over Sampling ∆ & PWM
`Internal 8fS Over Sampling Digital Filter
`Sampling Frequency  : 96kHz (Max.)
`De-Emphasis  : 32kHz, 44.1kHz, 48kHz
`System Clock  : 256fS
`Digital Processing  : Attenuator 107step, LOG Curve 
                                 : Mute
`Digital Audio Interface : 16bit, 18bit
                                       : I2S, LSB Justified, MSB Justified
`Operating Voltage  : 3.0 to 3.6V
`Driving Voltage  : VDD to 5.25V
`C-MOS Technology
`Package Outline    : SSOP20


Pinout

Connection Diagram


Specifications

PARAMETER SYMBOL RATING UNIT
Supply Voltage VDD
VDDL
VDDR 		-0.3 to +4.0
-0.5 to +5.5
-0.5 to +5.5 		V V
Input Voltage Vin -0.3 ~ VDD+0.3 V
Operating Temperature Topr -40 ~ +85 °C
Storage Temperature Tstg -40 ~ +125 °C
Power Dissipation SSOP20 PD 300 mW

Note 1)  All voltage values are specified as VSS= VSSR= VSSL=0V.
Note 2)  If the LSI is used on condition beyond the absolute maximum rating, the LSI may be destroyed.    Using  LSI  within electrical characteristics is strongly recommended for normal operation.    Use beyond the  electrical characteristics conditions will cause malfunction and poor reliability.
Note 3)  Decoupling capacitors should be connected  between VDD-VSS,  VDDR-VSSR  and  VDDL-VSSL due to  the  stabilized operation. 
 




Description

The NJU8721 is a class  D Headphone Amplifier  featuring 6th  ∆ modulation.  NJU8721 includes Digital  Attenuator, Mute, and De-emphasis circuits.  It  converts Digital source  input to  PWM signal output  which is  output PWM signal converted to analog  signal  with simple  external LC Filter.    The NJU8721  realizes very  high power-efficiency  by class D  operation.    Therefore, it is suitable for portable audio  set and others.  




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