#9038D

According to multiple headfiers requests: 3.5mm jack unbalanced output DAC+HPA 200mW@40ohm in the same case as #9038SG3. The same as 9038SG3, 9038D will work with Tweak app.

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Specifications(TBD):

Status:                            production

Retail cost:                     TBD $100

Materials:                       sandblasted/black anodized aluminum/laser mark/ES9038Q2M/OPA1622/OPA1602

                                        Susumu resistors, Murata C0G caps, AVX tantalum caps, Taiwanese connectors

Dimensions:                   48x22x9mm


Weight:                           12g


Power:                             USB +5V rail no internal battery, 95mA idle current, the device                                                                                           contains >4000uF of capacitance for the power rails filtering


Input:                               USB-C, PCM up to 32b/384kHz, DSD256

                                         USB bridge Comtrue CT7601CR custom FW


Output:                            standard unbalanced output 3.5mm jack, HW volume control .5db/step


Output impedance:       .07 Ohm@1000Hz Agilent U1733C

Output power:                180mW@32 Ohm@1kHz@THD=1%

                                         200mW@40 Ohm@1kHz@THD=1%

                                         120mW@16 Ohm@1kHz@THD=1%

                                         measured at +.5dbFS level, typical PC USB2 port powered 

                                         the hot unit produces less power

Frequency response:   5-80kHz +.05/-1db@ 32b/384kHz


SNR=DR@50MHz_MCLK:                      125db(A) typical, referenced to 2.75VRMS

 from the second batch 100% units are calibrated with the result printed on the case, >123db(A) is normal grade 

THD+N@1kHz@-.5dbFS BW 22-22kHz   .00014%, SINAD 117db typical for 24b/44.1kHz@no-load


THD@1kHz@-.5dbFS BW 22-22kHz   <.0001% typical for 24b/44.1kHz@no-load

THD+N@1kHz@-2.5dbFS BW 22-22kHz  .00018%, SINAD 115db typical 24b/44.1kHz@32ohm

THD+N@1kHz@-7dbFS BW 22-22kHz  .0005% typical for 24b/44.1kHz@16ohm(-6dbfs correspods 120mW)

Crosstalk:                     -135db@1kHz no-load, -82db@1kHz 32ohm load

 The Windows driver is here.

 FW tools are here

Warning: 9038D contains a high-sensitive I/V stage that may cause audible noise when your phone uses LTE  4G, 5g. 

Tech appendix

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Conventional PC USB2 port, 10Kohm vs 32ohm loads THD+N 

THD+N or SINAD at -0.3dbfs the data gathered from two samples, about 2.7VRMS no-load

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THD+N or SINAD at -0.3dbfs the data gathered from two samples, about 2.7VRMS no-load

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Conventional PC USB2 port, 10Kohm load THD+N vs time 

THD+N or SINAD at -2dbfs the data gathered from two samples, about 2.2VRMS 32ohm load
THD+N or SINAD at -2dbfs the data gathered from two samples, about 2.2VRMS 32ohm load

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THD+N or SINAD at -2dbfs the data gathered from two samples, about 2.2VRMS 32ohm load
THD+N or SINAD at -2dbfs the data gathered from two samples, about 2.2VRMS 32ohm load

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Conventional PC USB2 port, 32ohm load THD+N vs time 

AES17 DR at -60dbfs the data gathered from two samples
AES17 DR at -60dbfs the data gathered from two samples

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AES17 DR at -60dbfs the data gathered from two samples
AES17 DR at -60dbfs the data gathered from two samples

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Conventional PC USB2 port, AES17 Dynamic Range A-weighted vs time 

Frequency response PCM384 Slow Lin.Phase
Frequency response PCM384 Slow Lin.Phase

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Frequency response PCM384 Slow Lin.Phase
Frequency response PCM384 Slow Lin.Phase

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Frequency response PCM384 Slow Lin. Phase filter 10-40000Hz at -0.2db

Square wave 1kHz PCM384 Slow Lin.Phase.
Square wave 1kHz PCM384 Slow Lin.Phase.

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Square wave 1kHz PCM384 Slow Lin.Phase.
Square wave 1kHz PCM384 Slow Lin.Phase.

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Nearly ideal square wave 1kHz PCM384 Slow Lin.Phase filter at 200MHz BW scope

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Square wave 1kHz PCM192 Slow Lin.Phase filter at 200MHz BW scope

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Square wave 1kHz PCM96 Slow Lin.Phase filter at 200MHz BW scope

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Square wave 1kHz PCM44.1 Slow Lin.Phase filter at 200MHz BW scope

24/44.1 1kHz -0.5dbfs FFT no load
24/44.1 1kHz -0.5dbfs FFT no load

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24/44.1 1kHz -0.5dbfs FFT no load
24/44.1 1kHz -0.5dbfs FFT no load

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24b/44.1kHz 1kHz -0.5dbfs FFT no load

24/44.1 1kHz -2dbfs 150mW FFT 32ohm load
24/44.1 1kHz -2dbfs 150mW FFT 32ohm load

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24/44.1 1kHz -2dbfs 150mW FFT 32ohm load
24/44.1 1kHz -2dbfs 150mW FFT 32ohm load

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24b/44.1kHz 1kHz -2dbfs 150mW FFT 32ohm load

24/44.1 1kHz -2dbfs 150mW FFT 32ohm load
24/44.1 1kHz -2dbfs 150mW FFT 32ohm load

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24/44.1 1kHz -2dbfs 150mW FFT 32ohm load
24/44.1 1kHz -2dbfs 150mW FFT 32ohm load

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24b/44.1kHz 1kHz -2dbfs 40mW FFT 32ohm load

24b/48kHz 12kHz -2dbfs FFT no load
24b/48kHz 12kHz -2dbfs FFT no load

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24b/48kHz 12kHz -2dbfs FFT no load
24b/48kHz 12kHz -2dbfs FFT no load

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24b/48kHz 12kHz -2dbfs FFT no load