Tags: Decoder Board
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AXera PI Zero Module 5MP AI-ISP Camera Module Designed with SoC Chip AX620Q+SC450AI Image Sensor
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0.5-inch 1024X768 OLED Driver Board High Quality Circuit Board for V760A-5 Wearable Head Mounted Display
$40.24
1PCS SFP+ Dual Mode Optical Module Small Form-factor Pluggable Transceiver Support 10Gbps Transmission with LC Interface
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DAC end product,you need to equip power adapter and cable.
http://www.diykits.cn/bbs/forum.php?mod=viewthread&tid=1711&extra=page%3D1
User Manual
Code:k8k5
R2R DAC Decoder board: dam1021-01:
0.01% resistor version S/N 20 Khz Bandwith 127 dB unweighted Frequency
Range +0.1dB -1.0dB 20hz - 20Khz Output unbuffered Single ended 1.4V
RMS, Zout 625R Output buffered Balanced 4.0V RMS, Zout 20R Power input
7-8V AC or +-7-15V DC max 5W Board size 3.2" x 5.8" (81 x 147 mm)
Introduction:
-
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 upgradeable over a simple serial connection, which
enable new features later on.
- The basis R-2R network has an output
voltage of 1.4V RMS and output impedance of 625 ohm and can therefore
drive a lot of things directly. There is also onboard balanced output
drivers that can drive high impedance (>= 300 ohm) headphones
directly. The power supply is also onboard, just add a 5W or larger
toroid transformer.
- The latest Rev 4.0 version.
- Firmware version: V1.06
- Support DSD256
- Output buffer section change for Rev 4.0
- Change LME49710 & LME49724 into OPA1602
What is the difference between boards using 0.02% or 0.05% resistors ?
Only
the harmonic distortion gets better with more precise resistors, and
typically they will sound much the same as the resistors initially are
better than specified. But the more precise resistors have smaller
temperature drift and better long term stability, and therefore will be
better in the long term.
Standard Configurations:
-dam1021-02:0.02% resistor version
-dam1021-05:0.05% resistor version
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.
Specifications:
dam1021 series
- dam1021-01
THD @ -1 dB output:0.005%
THD @ -60 dB output:0.03%
- dam1021-02
THD @ -1 dB output:0.008%
THD @ -60 dB output:0.05%
- dam1021-05
THD @ -1 dB output:0.015%
THD @ -60 dB output:0.09%
