WM8725 Wolfson Microelectronics plc, WM8725 Datasheet - Page 5

• Manufacturer Part Number: WM8725
• Description: 99db Stereo Dac
• Manufacturer: Wolfson Microelectronics plc

WM8725
ELECTRICAL CHARACTERISTICS
w
Test Conditions
V
Digital Logic Levels
Input LOW level
Input HIGH level
Analogue Output Levels
Load Resistance
Maximum capacitance load
Output DC level
Reference Levels
Potential divider resistance
Voltage at CAP
DAC Circuit Specifications
SNR (Note 1)
Full scale output voltage
THD (Full scale)
THD+N (Dynamic range)
Frequency response
Transition band
Out of band rejection
Channel Separation
Gain mismatch
channel-to-channel
Audio Data Input and System Clock Timing Information
BCKIN pulse cycle time
BCKIN pulse width high
BCKIN pulse width low
BCKIN rising edge to LRCIN edge
LRCIN rising edge to BCKIN
rising edge
DIN setup time
DIN hold time
System clock pulse width high
System clock pulse width low
Notes:
1.
2.
DD
= 5V, GND = 0V, T
Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured
“A” weighted over a 20Hz to 20kHz bandwidth.
All performance measurements done with 20kHz low pass filter. Failure 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.
PARAMETER
A
= +25
o
C, fs = 48kHz, SCKI = 256fs unless otherwise stated.
SYMBOL
t
t
SCKIH
t
t
t
SCKIL
V
V
t
t
BCY
BCH
t
t
BCL
DS
DH
BL
LB
IH
IL
V
Into 10kohm VDD = 5V, 0dB
Into 10kohm VDD = 3V, 0dB
DD
To midrail or AC coupled
To midrail or AC coupled
to CAP and CAP to GND
TEST CONDITIONS
(5V supply)
(3V supply)
VDD = 5V
VDD = 5V
VDD = 3V
5V or 3V
-60dB
0dB
20,000
MIN
100
2.3
0.9
2.0
80
90
50
50
30
30
30
30
13
13
1
1
0
V
0.01
TYP
100
100
-40
2.5
1.0
0.6
DD
99
97
92
90
±1
/2
PD Rev 4.1 August 2004
20,000
MAX
0.02
120
0.8
2.7
1.1
±5
Production Data
%FSR
V
V
UNIT
kΩ
kΩ
pF
kΩ
dB
dB
dB
Hz
Hz
dB
dB
ns
ns
ns
ns
ns
ns
ns
ns
ns
RMS
RMS
%
V
V
V
V
5