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4.2 Digital Specs
Clocks: Internal, ADAT In, SPDIF In
Low jitter design: < 1 ns in PLL mode, all inputs
Internal clock: 800 ps jitter, random spread spectrum
Jitter suppression of external clocks: about 30 dB (2.4 kHz)
Effective clock jitter influence on AD and DA conversion: near zero
PLL ensures zero dropout, even at more than 100 ns jitter
Digital Bitclock PLL for trouble-free varispeed ADAT operation
Sample frequencies: 32 / 44.1 / 48 / 64 / 88.2 / 96 / 128 / 176.4 / 192 kHz
4.3 Digital Interface
Digital inputs and outputs ground-free transformer coupled
Formats: optical (TOSLINK), RCA (SPDIF, AES/EBU compatible)
High-sensitivity input stage RCA: < 0.2 Vss input level
Output voltage RCA Consumer 0.8 V, Professional 2.3 V
5. Power Supply
In order to make operating the ADI-2 as flexible as possible, the unit contains a switching
regulator of the latest technology, which not only has a high efficiency (> 90%), but also
prevents internal hum noise by operating beyond 100 kHz. Another advantage: the ADI-2
accepts any power supply with voltages between 8 and 28 V DC, no matter which polarity, and
even between 8 and 20 V AC. Given the power supply can deliver the current needed.
The supplied high-quality switching power supply, 12 V / 1.25 A, not only accepts any mains
voltage between 100 V and 240 V (usable world-wide), but is also fully regulated against volt-
age fluctuations. Additionally it only weighs 150 g in spite of its high power of 15 Watts.
The large voltage range of the ADI-2 also allows for the use of a rechargeable lead-battery
instead of a power supply, for completely independent mobile operation. A matching connec-
tion cable (power jack to terminals 6.3 mm) is available from RME. A Panasonic LC-
R122R2PG battery, 12 V 2.2 Ah, can operate the ADI-2 for 4 hours.
User's Guide ADI-2 © RME
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