ISD15100 SERIES

Publication Release Date: May 6, 2011

- 4 -

Revision 1.3

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µ-Law: 6, 7 or 8 bits per sample

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Differential µ-Law: 6, 7 or 8 bits per sample

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PCM: 8, 10 or 12 bits per sample

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Enhanced ADPCM: 2, 3, 4 or 5 bits per sample

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Variable-bit-rate optimized compression. This allows best possible compression given a

metric of SNR and background noise levels.



Oscillator

o

Internal oscillator with internal reference: 2.048 MHz with ±10% deviation

o

Internal oscillator with external resistor: 2.048 MHz with ±5% deviation when Rosc is 80k-ohm

o

External crystal or clock input

o

I

o

Crystals and resonators support standard audio sampling rates of 2.048, 4.096, 8.192, 12.288

and11.2896MHz



Inputs

o

AUXIN: Analog input with 2-bit gain control configured by SPI command

o

ANAIN/ANAOUT:



Analog input with the gain set by two external resistors from ANAOUT to ANAIN, or



Microphone differential input (ANAIN/ANAOUT becomes MIC+/MIC-)

o

Digital AGC:



Automatic gain control of digitized data from the analog input

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Outputs

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PWM: Class D speaker driver to direct drive an 8Ω speaker or buzzer

o

AUDOUT: configurable as a current or voltage single-ended line driver

o

AUXOUT: a single-ended voltage output

o

BTL: a differential voltage output



I/Os

o

SPI interface: MISO, MOSI, SCLK, SSB for commands and digital audio data

o

I

o

8 GPIO pins (4 of the 8 GPIO pins share with I



Three 8-bit Volume Control set by SPI command for flexible mixing

o

VOLA: volume control for the digital audio data from I

o

VOLB: volume control for the digital audio data from decompression block or SPI

o

VOLC: master volume control for PWM, AUDOUT, AUXOUT and I



Operating Voltage: 2.7-3.6V



Standby Current: 1uA typical



Package: Green 48L-LQFP



Temperature Options:

o

Industrial: -40

C to 85C