xwm8722eds ETC-unknow, xwm8722eds Datasheet - Page 5

• Manufacturer Part Number: xwm8722eds
• Description: Stereo Dac With Integrated Tone Generator And Line/variable Level Outputs
• Manufacturer: ETC-unknow

WM8722
Notes: 1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, over a
TERMINOLOGY
1.
2.
3.
4.
5.
6.
Test Conditions
AVDD, DVDD = 5V, AGND, DGND = 0V, T
PARAMETER
Gain mismatch
Frequency Bandwidth
Master volume max gain
Master volume min gain
Master volume step size
(Note 4)
Master volume gain code
80 – 127 (mute)
Mixer trim max gain
Mixer trim min gain
Mixer trim step size
Mono gain
Tone Generator
SINAD (Note 3)
SINAD
SINAD
SINAD
Full scale output voltage;
trims at
Tone Frequency
Tone Duration
Gain adjust range
Gain adjust step size
(Note 4)
Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
Dynamic range (dB) - DR is a measure of the difference between the highest and lowest portions of a signal.
Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB
to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB).
THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band).
Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
Pass-Band Ripple - Any variation of the frequency response in the pass-band region.
2. All performance measurements done with 20kHz low pass filter, and where noted an ‘A’ weighted filter. Failure
3.
4.
20Hz to 20kHz bandwidth.
to use such a filter will result in higher THD+N and lower SNR and Dynamic Range readings than are found in
the Electrical Characteristics. The low pass filter removes out of band noise; although it is not audible it may
affect dynamic specification values.
SINAD is ratio of signal to sum of noise, harmonics and spurii, over a bandwidth from 1Hz up to either 127x
the tone frequency, or 20kHz, whichever is the lower. (This is to allow for the lower frequency tones having
images at 127x and 129x the tone frequency which will fall in the audio band for tones of frequency less than
about 20kHz/128).
Guaranteed monotonic.
SYMBOL
A
= +25
TCLK frequency = 27MHz
TCLK frequency = 27MHz
4kHz to 32kHz tones
TEST CONDITIONS
1kHz to 2kHz tones
2kHz to 4kHz tones
Channel to channel
1Hz to 1kHz tones
o
C, fs = 48kHz, SCKI = 256fs unless otherwise stated.
0dB gain
0dB
-46.5
MIN
0.1
-7
5
1
+/-1%
-34.5
-100
TYP
100
-73
1.5
2.5
1.5
12
62
64
66
70
-6
6
1
32767
+/-5%
AI Rev 2.1 June 2001
Advanced Information
MAX
25.5
-5
7
0
% of FSR
V pk-pk
UNIT
secs
kHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Hz
dB
dB
5