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WM8998 Datasheet(PDF) 23 Page - Wolfson Microelectronics plc

Part # WM8998
Description  High Performance Audio Hub CODEC
PDF  307 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8998 Datasheet(HTML) 23 Page - Wolfson Microelectronics plc

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Production Data
WM8998
w
PD, October 2014, Rev 4.0
23
Test Conditions
DBVDD1 = DBVDD2 = DBVDD3 = LDOVDD = CPVDD = AVDD = 1.8V,
DCVDD = 1.2V (powered from LDO1), MICVDD = 3.0V (powered from LDO2), SPKVDDL = SPKVDDR = 4.2V,
TA = +25ºC, 1kHz sinusoid signal, fs = 48kHz, Input PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
MICVDD Charge Pump and Regulator (CP2 and LDO2)
Output voltage
VMICVDD
1.7
2.7
3.3
V
Programmable output voltage step
size
50
mV
Maximum output current
8
mA
Start-up time
4.7µF on MICVDD,
IMICBIASn = 1mA
4.5
ms
Frequency Locked Loop (FLL1, FLL2)
Output frequency
Normal operation,
input reference supplied
13
50
MHz
Free-running mode,
no reference supplied
30
Lock Time
FREF = 32kHz,
FOUT = 24.576MHz
10
ms
FREF = 12MHz,
FOUT = 24.576MHz
1
RESET pin Input
RESET input pulse width
(To trigger a Hardware Reset, the
RESET input must be asserted for
longer than this duration)
1
µs
Test Conditions
The following electrical characteristics are valid across the full range of recommended operating conditions.
Device Reset Thresholds
AVDD Reset Threshold
VAVDD
VAVDD rising
0.96
V
VAVDD falling
0.54
DCVDD Reset Threshold
VDCVDD
VDCVDD rising
1.03
V
VDCVDD falling
0.48
DBVDD1 Reset Threshold
VDBVDD1
VDBVDD1 rising
0.96
V
VDBVDD1 falling
0.54
Note that the reset thresholds are derived from simulations only, across all operational and process corners.
Device performance is not assured outside the voltage ranges defined in the “Recommended Operating Conditions” section.
Refer to this section for the WM8998 power-up sequencing requirements.



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