ULN-2
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(Created page with "The ULN-2 '''Monitor gain''' On the ULN-2, all monitor controller gain is in the analog domain, and you can adjust the maximum level via the front panel knob for the monito...") |
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'''Monitor gain''' | '''Monitor gain''' | ||
| - | On the ULN-2, all monitor controller gain is in the analog domain, and you can | + | On the [[ULN-2]], all monitor controller gain is in the analog domain, and you can |
adjust the maximum level via the front panel knob for the monitor outputs. | adjust the maximum level via the front panel knob for the monitor outputs. | ||
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'''Save-States''' | '''Save-States''' | ||
| - | There are 9 additional alternative boot states stored in the [ULN-2], and 8 alternative boot states stored in the [ULN-8]. | + | There are 9 additional alternative boot states stored in the [[ULN-2]], and 8 alternative boot states stored in the [[ULN-8]]. |
They are accessed through the front panel up and down buttons. To store a boot state to the hardware, open MIO Console App and | They are accessed through the front panel up and down buttons. To store a boot state to the hardware, open MIO Console App and | ||
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'''Safe-Boot Mode''' | '''Safe-Boot Mode''' | ||
| - | When you safety boot the [ULN-2], | + | When you safety boot the [[ULN-2]], |
| - | hold the the 'up arrow' button (there is no dim button on the [ULN-2]) | + | hold the the 'up arrow' button (there is no dim button on the [[ULN-2]]) |
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'''ULN-2 Conversion''' | '''ULN-2 Conversion''' | ||
| - | The AKM 5383 is a 108 kHz 24-bit ADC, used in both the [ULN-2] and [2882] | + | The AKM 5383 is a 108 kHz 24-bit ADC, used in both the [[ULN-2]] and [[2882]] |
| - | The AKM 4393 is a 96 kHz 24-bit sigma-delta DAC, used in both the [ULN-2] and [2882] | + | The AKM 4393 is a 96 kHz 24-bit sigma-delta DAC, used in both the [[ULN-2]] and [[2882]] |
| - | These are both stereo chips, so the [ULN-2] has one for input and two for output, while the [2882] has four of each of them for the main analog I/O plus an additional DAC for the cans. The [ULN-8] has 8 of each, plus a DAC for the cans. | + | These are both stereo chips, so the [[ULN-2]] has one for input and two for output, while the [[2882]] has four of each of them for the main analog I/O plus an additional DAC for the cans. The [[ULN-8]] has 8 of each, plus a DAC for the cans. |
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| - | SRC in the [2882] and [ULN-2] use a Cirrus Logic CS8420 Digital Audio Sample Rate Converter which runs at 108 kHz and 24-bit for real-time SRC. | + | SRC in the [[2882]] and [[ULN-2]] use a Cirrus Logic CS8420 Digital Audio Sample Rate Converter which runs at 108 kHz and 24-bit for real-time SRC. |
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'''ULN-2 Analog Stages''' | '''ULN-2 Analog Stages''' | ||
| - | Both the [ULN-2] and [2882] use the Excalibur low-noise high-speed JFET-input op-ampsfrom Texas Instruments, | + | Both the [[ULN-2]] and [[2882]] use the Excalibur low-noise high-speed JFET-input op-ampsfrom Texas Instruments, |
| - | and the [ULN-2] adds Burr-Brown OPA 2228 op- amps for high precision and low noise in high-gain situations. | + | and the [[ULN-2]] adds Burr-Brown OPA 2228 op- amps for high precision and low noise in high-gain situations. |
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At 12 Volts the current demand is: | At 12 Volts the current demand is: | ||
| - | [ULN-8] : 3-3.5A | + | [[ULN-8]] : 3-3.5A |
| - | [2882] High Power Mode 1.5A | + | [[2882]] High Power Mode 1.5A |
| - | [2882]: Low Power Mode 1A | + | [[2882]]: Low Power Mode 1A |
| - | [ULN-2] : 0.75A | + | [[ULN-2]] : 0.75A |
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| - | Both the [2882] and [ULN-2] can be bus powered, the [ULN-8] will pass bus power, but does not provide it. (it also must be connected to a computer to power a MIO downstream) | + | Both the [[2882]] and [[ULN-2]] can be bus powered, the [[ULN-8]] will pass bus power, but does not provide it. (it also must be connected to a computer to power a MIO downstream) |
Revision as of 15:41, 20 August 2011
The ULN-2
Monitor gain
On the ULN-2, all monitor controller gain is in the analog domain, and you can adjust the maximum level via the front panel knob for the monitor outputs.
Save-States
There are 9 additional alternative boot states stored in the ULN-2, and 8 alternative boot states stored in the ULN-8.
They are accessed through the front panel up and down buttons. To store a boot state to the hardware, open MIO Console App and
Menu>Utilities>Save BootState x
(X= bootstate number corresponding to front panel button number)
Safe-Boot Mode
When you safety boot the ULN-2,
hold the the 'up arrow' button (there is no dim button on the ULN-2)
ULN-2 Conversion
The AKM 5383 is a 108 kHz 24-bit ADC, used in both the ULN-2 and 2882
The AKM 4393 is a 96 kHz 24-bit sigma-delta DAC, used in both the ULN-2 and 2882
These are both stereo chips, so the ULN-2 has one for input and two for output, while the 2882 has four of each of them for the main analog I/O plus an additional DAC for the cans. The ULN-8 has 8 of each, plus a DAC for the cans.
depending upon the sample rate, these AKM converters run at 128x oversampling – which happens to be the same rate as SACD. The DACs also have an 8x digital filter inside.
SRC in the 2882 and ULN-2 use a Cirrus Logic CS8420 Digital Audio Sample Rate Converter which runs at 108 kHz and 24-bit for real-time SRC.
ULN-2 Analog Stages
Both the ULN-2 and 2882 use the Excalibur low-noise high-speed JFET-input op-ampsfrom Texas Instruments,
and the ULN-2 adds Burr-Brown OPA 2228 op- amps for high precision and low noise in high-gain situations.
Power Requirements
The minimum pre-regulation voltage is 9V.
The Maximum preregulation voltage is 33V.
At 12 Volts the current demand is:
ULN-8 : 3-3.5A
2882 High Power Mode 1.5A
2882: Low Power Mode 1A
ULN-2 : 0.75A
A custom [jump boot] device can be be built with a pair of 9V batteries. It is used to power-on the MIO if the inrush current is too high for some macbooks to power the MIO properly.
Both the 2882 and ULN-2 can be bus powered, the ULN-8 will pass bus power, but does not provide it. (it also must be connected to a computer to power a MIO downstream)
DI Input
the TRS on the Combo Jack is 200K, which is pretty Hi-Z and would be a good DI.