WM8725GED/RV Ver la hoja de datos (PDF) - Wolfson Microelectronics plc
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WM8725GED/RV Datasheet PDF : 12 Pages
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WM8725
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions
VDD = 5V, GND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Digital Logic Levels
Input LOW level
VIL
Input HIGH level
VIH
Analogue Output Levels
Load Resistance
To midrail or AC coupled
(5V supply)
To midrail or AC coupled
(3V supply)
Maximum capacitance load
5V or 3V
Output DC level
Reference Levels
Potential divider resistance
VDD to CAP and CAP to GND
Voltage at CAP
VDD = 5V
DAC Circuit Specifications
SNR (Note 1)
VDD = 5V
VDD = 3V
Full scale output voltage
Into 10kohm VDD = 5V, 0dB
Into 10kohm VDD = 3V, 0dB
THD (Full scale)
0dB
THD+N (Dynamic range)
-60dB
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
tBCY
BCKIN pulse width high
tBCH
BCKIN pulse width low
tBCL
BCKIN rising edge to LRCIN edge
tBL
LRCIN rising edge to BCKIN
tLB
rising edge
DIN setup time
DIN hold time
System clock pulse width high
System clock pulse width low
tDS
tDH
tSCKIH
tSCKIL
Notes:
MIN
2.0
1
1
80
2.3
90
0.9
0
20,000
100
50
50
30
30
30
30
13
13
TYP
100
VDD/2
100
2.5
99
97
1.0
0.6
0.01
92
-40
90
±1
MAX
UNIT
0.8
V
V
kΩ
kΩ
pF
V
120
kΩ
2.7
V
1.1
0.02
20,000
±5
dB
dB
VRMS
VRMS
%
dB
Hz
Hz
dB
dB
%FSR
ns
ns
ns
ns
ns
ns
ns
ns
ns
1. 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.
2. 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.
w
PD Rev 4.1 August 2004
5
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