92HD005 Datasheet, PDF (20/205 Pages) Integrated Device Technology – 4-CHANNEL HD AUDIO CODEC WITH QUAD DIGITAL MICROPHONE INTERFACE

92HD005/92HD005D
4-CHANNEL HD AUDIO CODEC WITH QUAD DIGITAL MICROPHONE INTERFACE
PC AUDIO
1.3.7. Mono Output
MONO Output is supported on pin 32 and has an independent mute and volume control. The MONO
Output derives input from the output of the summing node after DAC0. The following analog signals
feed the summing amplifier that feeds the MONO Output summing amplifier:
• DAC0 Output: When enabled, both DAC0 Outputs are summed together.
• Analog PC Beep: Sourced from pin 12.
• ADC Input: Stereo analog feed into the stereo ADC input.
• The combination of the stereo channels from DAC0 are combined into a single analog signal
with a -6dB degradation in signal strength.
Note: MONO Output only works with the IDT Driver.
1.3.8. Universal Jacks™
The Universal Jacks™ technology allows for the greatest flexibility in board design and implementa-
tion.
For the 92HD005/92HD005D the Universal Jacks™ capabilities are as follows¹:
• Ports A and D² support³:
• Headphone Out
• Line Out
• Line In
• Microphone, with 0/10/20/30/40 dB Microphone boost⁴
• Ports B, C, E, and F support³:
• Line Out
• Line In
• Microphone, with 0/10/20/30/40 dB Microphone boost⁴
• Mono Output cannot be reconfigured
Note: 1) On the 92HD005/92HD005D, only one function can be selected on each pin pair at a
time. For example, a pin pair cannot be configured as an input and output at the same time.
Configuration can be changed at any time.
Note: 2) Port D does not provide a microphone bias pin. Therefore only an internal, fixed-function
microphone can be supported.
Note: 3) Headphone capabilities are provided on Ports A and D, however, audio performance
degrades when 2 headphones are enabled.
Note: 4) When the 40dB microphone boost feature is enabled, additional gain increases greater
than 6dB may result in significant audio quality degradation of the microphone audio input. In
particular, when the 40dB microphone boost is active, the SNR, THD+N and DC offset will
significantly degrade regardless of the input signal level.
1.3.8.1. Jack Detect
SENSE_A pin is used to detect the presence of plugs in ports A, B, C, and D. SENSE_B pin is used
to detect the presence of plugs in ports E and F. Refer to the 92HD005/92HD005D reference design
for port detect circuitry.
IDT™
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4-CHANNEL HD AUDIO CODEC WITH QUAD DIGITAL MICROPHONE INTERFACE
92HD005/92HD005D
V 1.0 12/06