Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD1870 and the AD1871
Edited by the Electronicstalk Editorial
Team on 02 November 2001
Stereo audio conversion to 16 or 24bit
resolutiom
Analog Devices has released the AD1870 and the AD1871 stereo audio convertors.
Analog Devices has released the AD1870 and the AD1871 stereo audio convertors The AD1870 is a low-cost, 16bit oversampling stereo audio ADC based on sigma-delta technology intended primarily for digital audio bandwidth applications requiring a single 5V power supply
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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It offers 92dB signal-to-noise ratio (SNR) and -90dB total harmonic distortion and noise (THD+N) performance, and the serial digital output is very flexible with eight user-defined modes, both master and slave.
The AD1870 can also be interfaced to DSP chips (such as ADI's ADSP-219x and SHARC families) with a minimum of glue logic.
The AD1870 features a power-down mode during which the device dissipates less than 100uW typically.
The primary applications are consumer audio electronic appliances such as CD-R, automotive HiFi systems, digital and HDTV.
The AD1871 is a 24bit, 96kHz stereo audio ADC featuring two 24bit conversion channels each with a programmable gain amplifier, multi-bit sigma-delta modulator and decimation filters.
It offers the high performance required for DVD-R and other emerging consumer applications supported by -94dB of THD+N and 105dB of dynamic range.
Each of the AD1871 input channels can be used as either single-ended or differential inputs.
The sigma-delta modulator features a proprietary multibit architecture which realises optimum performance over an audio bandwidth with standard audio sampling rates of 32 to 96kHz.
The AD1871 audio data interface supports all common interface formats such as I2S, left-justified, and right-justified.
The AD1871 also offers a unique cascade mode feature allowing up to four AD1871s (eight channels) to drive a single DSP SPORT.
The cascade mode is especially beneficial in multichannel applications such as high-end consumer ("prosumer") and professional mixing consoles.
The AD1870 is packaged in a 28-pin SSOP and costs $4.52 in 1000-piece quantities.
The AD1871 is also packaged in a 28-pin SSOP and costs $5.09 in 1000 piece quantities.
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