dam1021
The dam1021 is a DAC module based on a discrete R-2R sign
magnitude DAC design, with FPGA based FIFO buffering/reclocking and
custom digital filters, < 1 ps jitter clock generator, with 28 bit
resolution so there is headroom, oversampling up to 3.072 Mhz. Up to
24 bit / 384 Khz input from SPDIF, I2S and USB (via USB to I2S
interface board), with isolation on the I2S interface. The board is very
flexible, with digital volume control and filter parameters that can
be downloaded. The board is fully firmware upgradable over a simple
serial connection, which enable new features later on. Now full
support for DSD when using firmware vers 1.05 or newer.
The basis R-2R network has an output voltage of 1.4V RMS and output
impedance of 640 ohm and can therefore drive a lot of things
directly. There is also onboard balanced output drivers that also can
drive high impedance (>= 300 ohm) headphones directly. The power
supply is also onboard, just add a 5W+ toroid transformer.
Pricing, qty 1 excluding local taxes:
dam1021-05: EUR 219 (0.05% resistor version)
No Stock.
dam1021-12: EUR 315 (0.01%/0.02% resistor version)
In Stock.
dam1021-02 is not a stocking item anymore.
What is the difference between boards using 0.01%, 0.02%
or 0.05% resistors ?
Only the harmonic distortion get
better with more precise resistors, and typically they will sound much the
same as the resistors initially are better then specified. But the
more precise resistors has smaller temperature drift and better long
term stability, and therefore will be better in the long term.
dam1021(rev3) |
 dam1021 rev7 |
|
fft -1 db |
fft -60 db |
Specifications:
| Product Name | dam1021-12 | dam1021-05 |
| THD @ -1db | 0.007% | 0.015% |
| THD @ -60dB | 0.03% | 0.09% |
| Resistor Precision | 28 bit, 0.01% - 0.05% Resistors | 28 bit, 0.05% Resistors |
| Clock Jitter RMS | 0.8 pS typical | |
| S/N 20 Khz Bandwith | 127 dB unweighted | |
| Frequency Range +0.1dB -1.0dB | 20hz - 20Khz | |
| Input SPDIF | Coax and Toslink, Up to 24 bit / 192 Khz | |
| Input I2S PCM | Fully Isolated, Up to 24 bit / 384 Khz | |
| Input I2S DSD | Fully Isolated, Up to DoP128 and DSD256 | |
| Output unbuffered | Single ended 1.4V RMS, Zout 640R | |
| Output buffered | Balanced 4.0V RMS, Zout 20R | |
| Power input | +-8-15V DC max 5W, Typ 2W | |
| Board size | 3.2" x 5.8" (81 x 147 mm) | |