Focusrite ISA828-A/D-CARD

The ISA eight channel 192kHz A-D converter outperforms every other converter yet devised, and is the first audio A-D conv erter 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 ISA 428 or 828 at any time and, thanks to its convenient 25-pin D-Type connector, integrates seamlessly with ProTools HD as well as other popular hard disk recorders and mixing desks.

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) outputs. Word clock i/o is provided via dedicated BNC connectors.

Specifications

• 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)
• Bit Depth: 24 bits, internally configurable to 16 or 20 bits if necessary
• AES3 output jitter: <:1500ps, 50Hz-100kHz <:350ps, 700Hz-100kHz
• Frequency Response: All range: 20Hz-20kHz +/-0.3dB (100Hz-20kHz +/-0.1dB) 176.4kHz, 192kHz: 17Hz-90kHz +/-0.5dB
• THD+N: -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
• Crosstalk: -100dB at 12kHz
  (paired channels) -95dB at 20kHz