Grimm Audio · Studio Electronics
AD1
Grimm Audio AD1 modular 2-to-8-channel analogue-to-digital converter with discrete 1-bit delta-sigma modulators.
fig. 01 · studio electronics
AD1
From Grimm Audio
The AD1 converts analogue signals to 1-bit DSD at 2.8224 MHz using discrete 6th-order continuous-time delta-sigma modulators. Its signal path places only four resistors between the audio input and the feedback DAC. SNR is 116 dB unweighted, THD is -129 dB, and oscillator jitter is below 2.5 ps RMS.
Specifications
| Product type | AD converter |
|---|---|
| Channels | 2 to 8 per chassis |
| Converter type | Discrete 6th-order continuous-time delta-sigma |
| Output format | SDIF3 (BNC) |
| Output rate | 1-bit, 2.8224 MHz (DSD) |
| SNR | 116 dB (unweighted) |
| THD | -129 dB (excluding noise, full-scale) |
| Input impedance | 10 kohm (balanced) |
| Gain range | 0 dB(DSD) = 12 to 24 dBu in 2 dB steps |
| Oscillator jitter | <2.5 ps RMS (integrated to 10 Hz) |
| PLL jitter rejection | 90 dB at 10 Hz (Ultra mode) |
| Sync I/O | 44.1 kHz |