W681308DG Datasheet, PDF (57/64 Pages) Nuvotem Talema – W681308 USB Audio Controller from Nuvoton integrates fast 8051 Microcontroller Unit (MCU)

W681308
XXXX PRODUCT DESCRIPTION
20.5 Analog Distortion and Noise Parameters
All ADC tests using Auxiliary input mode @ 0dB gain
20.5.1
8kHz sampling
AVDD=3.13V – 3.47V; V_SS=0V; T_A=-40°C to +85°C; 8kHz sampling
PARAMETER
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion
Total Harmonic Distortion
Frequency Response
Power Supply Rejection
SYMBOL
CONDITION
SNR
THD3
THD8
THD4
Frl
PSRR_A
Idle channel
A-weighted
-3dBFS @ 1020 Hz,
32Ohm speaker load
-3dBFS @ 1020 Hz,
8Ohm speaker load
-6dBFS @ 1020 Hz,
4Ohm speaker load
-3dB Low pass cut-off
V_DDUSB; 35mVrms DC
to 3.4 kHz
A-weighted
TRANSMIT (ADC)
MIN TYP MAX
80
94
--
--
-77
-67
--
-77
-67
--
-79
-69
3.36
70
88
---
RECEIVE (DAC)
MIN TYP MAX
80
88
--
--
-77
-67
--
-70
-60
--
-65
-55
3.36
70
85
---
UNIT
dB
dB
dB
dB
kHz
dB
20.5.2
16kHz sampling
AVDD=3.13V – 3.47V; V_SS=0V; T_A=-40°C to +85°C; 16kHz sampling
PARAMETER
SYMBOL
CONDITION
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion
Total Harmonic Distortion
SNR
THD3
THD8
THD4
Idle channel
A-weighted
-3dBFS @ 1020 Hz,
32Ohm speaker load
-3dBFS @ 1020 Hz,
8Ohm speaker load
-6dBFS @ 1020 Hz,
4Ohm speaker load
TRANSMIT (ADC)
MIN TYP MAX
80
93
--
RECEIVE (DAC)
MIN TYP MAX
UNIT
80
86
--
dB
--
-76
-66
--
-78
-68
dB
--
-76
-66
--
-70
-60
dB
--
-79
-69
--
-65
-55
dB
Frequency Response
Power Supply Rejection
Frl
-3dB Low pass cut-off
6.73
PSRR_A
V_DDUSB; 35mVrms
DC to 6.8 kHz
A-weighted
70
89
---
6.73
kHz
70
85
---
dB
57
Rev1.2