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A NEW ISD15000 SERIES OF RECORD/PLAYBACK DEVICES

The ISD15000 series ICs are multiple message record/playback devices featuring digital compression, digital storage in flash memory, comprehensive memory management, and integrated analog/digital audio signal paths. This family offers excellent audio quality. Unlike other ChipCorder series the ISD15000 series provide an I²S digital audio interface, faster digital recording, higher sampling frequency - up to 48 kHz (and thereby wider bandwidth) and a signal path with SNR equivalent to 12 bit resolution. The digital audio data can be taken via I²S or SPI interface. This data can be either recorded directly without mixing or mixed with the analog audio inputs and sent to the analog outputs. Output digital audio data is available from I²S or SPI interface. Similarly to other ISD devices the ISD15000 series has also built-in analog audio inputs (one of them can be used as a microphone differential input), analog audio line driver and speaker driver output (PWM mode).

Basic features:

multi-message, address-free recording
fast digital recording, up to 1 Mbit/sec
seven record and playback sampling frequencies are available for a given master sample rate
(for a 32 kHz master sample rate, sampling frequencies of 4 / 5.3 / 6.4 / 8 / 12.8 / 16 / 32 kHz are available)
compression algorithms: 2/3/4/5-bit ADPCM, 8/10/12-bit PCM without compression, 6/7/8-bit μ-Law
record duration: 1...32 minutes based on 4-bit ADPCM modulation and 8 kHz sampling frequency.
There are six parts with different duration:
ISD15001 - 1 min
ISD15002 - 2 min
ISD15004 - 4 min
ISD15008 - 8 min
ISD15016 - 16 min
ISD15032 - 32 min
SPI interface for commands and digital audio data
I²S interface for digital audio data
for I²S operation 32 / 44.1 / 48 kHz master sample rates are available
oscillators: internal oscillator with internal or external reference, external crystal or clock input, I²S bit clock input
analog input with 2-bit gain control configured by SPI command
second analog input with the gain set by external resistors or alternatively microphone differential input
automatic gain control of digitized data from the analog input
PWM outputs which can directly drive a speaker or buzzer
a current or voltage single-ended line driver
a single-ended voltage output
three 8-bit volume control
operating voltage range: 2.7 ... 3.6 V
operating temperature range: commercial (0 ... +70 °C) and industrial (-40 ... +85 °C)
package: 48-LQFP, Pb-free

2007-08-08 14:05:38

PDW MARTHEL ul. Sosnowa 24-5 Bielany Wrocławskie 55-040 Kobierzyce
tel. (71) 311 07 11 fax: (71) 311 07 13 marthelinfo@marthel.pl

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