The ISA eight channel 192kHz A-D converter outperforms every other converter yet devised, and was the first audio A-D converter to utilise Burr-Brown Pro Audio Amplifiers and flagship PCM4220 A-D converter chips. With cutting-edge conversion technology seated within Focusrite custom analogue circuitry, the card delivers unparalleled performance; specifications include a dynamic range of 122dB and jitter less than 250 picoseconds.
The card can be retrofitted to an ISA428, ISA428 MkII or ISA828 at any time and, thanks to its convenient 25-pin D-Type connector, integrates seamlessly with Pro Tools HD as well as other popular hard disk recorders and mixing desks.
All eight converters are always available with this option, even when using the ISA428 and ISA428 MkII. When installed in one of these four-channel mic preamps, the the extra 4 converters of the A-D card are fed by four XLR inputs on the back labeled "ADC Input".
Digital formats include an eight-channel single/dual wire AES/EBU and S/PDIF output, as well as an eight-channel ADAT lightpipe (SMUX/SMUX2) output. Word clock i/o is provided via dedicated BNC connectors.
Output formats (All channels)
- AES/EBU (5V / 110 ohms), S/PDIF (0.8V / 75 ohms)
- ADAT lightpipe (SMUX I/II/IV, channels 1-4 only in 176.4kHz, 192kHz mode)
- S/PDIF lightpipe (channels 1-4 only; mutually exclusive with ADAT lightpipe)
- 24 bits, internally configurable to 16 or 20 bits if necessary.
AES3 output jitter
- <:1500ps, 50Hz-100kHz
- <:350ps, 700Hz-100kHz
- All ranges: 20Hz–20kHz ± 0.3dB (100Hz–20kHz ± 0.1dB)
- 176.4kHz, 192kHz : 17Hz–90kHz ± 0.5dB
- –121.5dB A-weighted, audio band-limited, 1kHz, -60dB FS input
- Maximum 0.0033% at –1dB FS (1kHz)
- Minimum 0.0008% at –15dB FS (1kHz)
Idle channel noise
- 117.5dB at 44.1kHz, CCIR-weighted, full bandwidth
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