Description

 

E1DA Cosmos ADCiso High Precision ADC Analog-to-Digital Converter Audio Measurement ES9822Pro OPA1612

Specification:
- Material and surface processing: aluminum black oxide sandblasting + laser engraving
- Main component: ES9822Pro, OPA1612, RT6863S, for Susumu/Viking resistor, for Murata/Samsung COG capacitor, etc.
- Size: 104 x 61 x 39mm (PCBA: 90 x 50 x 29mm)
- Weight: 157g (PCBA: 34g)
- Power supply: USB-C +5VDC, < 250mA current, there is an independent power supply port for ADCiso version, please power it on first.
- Input:
  USB: bridgeComtrue CT7601PR 768K Custom FW
  XLR: L/R (FDA) up to 10Vrms
  AUX: 2.5mm Jack up to 43Vrms
- Output: USB-C, PCM up to 32B/768kHz, with 8pf isolation
- Note: please do not use a screwdriver to secure the data cable, but use your fingers to avoid damaging the USB-C socket with excessive force.
- Latency: 5mS at 192K ASIO4ALL REW (measured as physical delay/2 from ADC input to the 9038D output)
- Input range/impedance: 1.7Vrms/640ohms; 2.7Vrms/1kohms; 3.5Vrms/1.3kohms; 4.5Vrms/1.66kohms; 6.7Vrms/2.46kohms; 7.6Vrms/2.82kohms; 8.5Vrms/3.12kohms; 10Vrms/3.48kohms; 43Vrms/13.6kohms; (Note: unbalanced impedance will be approximately 30% lower)
- Frequency response: 0.8Hz-320kHz at 32B/768kHz-3dB, depends on the interpolation filter settings
- SNR and DR: 126 - 128dB (A); measured in mono mode; SNR/DR in stereo mode is 3dB lower; measured at 32/48 AP2700
- THD+N and THD:
  THD+N at 1kHz at -0.5dbFS SR48kHz BW 20-20kHz: 0.00007%
  SINAD: 122dB Grade B
  THD at 1kHz at -0.5dbFS BW 22-22kHz: <0.00003% (0.3-0.2PPM)
  Typical for 32b/48kHz all harmonics level: -135 to -145dB
- Crosstalk: < -140dB at 1kHz / ADCiso; <-153dB if not used inputs are shorted

E1DA Cosmos Tweak Windows App Using Precaution:
- This application can adjust the distortion harmonic level, interpolation filter, and ADC integrator settings.
- Harmonic control is similar to the TWEAK9038 for Android application we use for 9038D/SDAC, but not subject to volume control.
- All ADC units are calibrated before sale, so it is best not to change the settings of the Cosmos Tweak Windows application without copying the calibration values.
- For example, after inserting the ADC, run TweakCosmosQT.exe and click the 【Connect&Read】 button to see the calibration value of THD compensation.
  THD ADC1/3:2nd, 3rd as the left channel
  THD ADC2/4:2nd, 3rd as the right channel
  And ADC-IN_SEL for ADC1-4 (usually, all parameters there=11)
- To confirm if the calibration values are correct, click the 【Connect&Read】 button again and check if the app is connected to the hardware. Do not lose the calibration values!
- The typical second compensation value is 0+/-5, and the third compensation value is -7 to -15.
- Why do you think you may need to use this application? If you have an accurate ultra-low loss true string source (such as an AP analyzer, Custom -150db Clean 1kHz oscillator, or Cosmos DAC), you can re-calibrate the Cosmos ADC distortion yourself.
- Just like AP analyzers need to be re-calibrated regularly every year, precision ADCs like Cosmos also need to re-calibrate THD.
- The ADC-IN_SEL parameter can improve the SNR of the ADC.
- Adjusting the slider by 2ch MODE/1ch MODE can switch the STEREO/MONO mode of the ADC, which is the same as adjusting the volume.
- There are 8 filter modes to choose from, with the default mode being apodized linear phase. If you are concerned about latency issues, you can choose the minimum phase filter. All changed parameters will be automatically saved.

Package Included:
- 1 x ADC Converter

Note:
- Please contact our customer service for the software and driver after receiving the product.