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PDF WM1824 Data sheet ( Hoja de datos )
| Número de pieza | WM1824 | |
| Descripción | 24-bit 192kHz Stereo DAC | |
| Fabricantes | Wolfson Microelectronics | |
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WM1824
24-bit 192kHz Stereo DAC with 2Vrms Ground Referenced Line Output
DESCRIPTION
The WM1824 is a stereo DAC with integral charge pump.
This provides 2Vrms line driver outputs using a single 3.3V
power supply rail.
The device features ground-referenced outputs and the use
of a DC servo to eliminate the need for line driving coupling
capacitors and effectively eliminate power on pops and
clicks.
The device is controlled and configured via a hardware
control interface.
The device supports all common audio sampling rates
between 8kHz and 192kHz using all common MCLK fs
rates. The audio interface operates in slave mode.
The WM1824 has a 3.3V tolerant digital interface, allowing
logic up to 3.3V to be connected.
The device is available in a 24-pin QFN.
FEATURES
High performance stereo DAC with ground referenced line
driver
Audio Performance
106dB SNR (‘A-weighted’)
-89dB THD @ -1dBFS
120dB mute attenuation
All common sample rates from 8kHz to 192kHz supported
Hardware control mode
Data formats: LJ, I2S
Maximum 1mV DC offset on Line Outputs
Pop/Click suppressed Power Up/Down Sequencer
AVDD, LINEVDD and DBVDD can operate at +3.3V ±10%
allowing single supply
24-lead QFN package
Operating temperature range: -40°C to 85°C
APPLICATIONS
Consumer digital audio applications requiring 2Vrms output
Games Consoles
Set Top Box
A/V Receivers
DVD Players
Digital TV
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
Production Data, December 2011, Rev 4.1
Copyright 2011 Wolfson Microelectronics plc
1 page  
Production Data
WM1824
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously
operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given
under Electrical Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically
susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling
and storage of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
AVDD, LINEVDD, DBVDD
Voltage range digital inputs
Voltage range analogue inputs
Temperature range, TA
Storage temperature after soldering
Notes
1. Analogue grounds must always be within 0.3V of each other.
2. LINEVDD and AVDD must always be within 0.3V of each other.
MIN
-0.3V
LINEGND -0.3V
AGND -0.3V
-40°C
-65°C
MAX
+4.5V
LINEVDD +0.3V
AVDD +0.3V
+125°C
+150°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analogue supply range
AVDD, LINEVDD
2.97 3.3 3.63
V
Ground
AGND, LINEGND
0V
Digital Buffer supply range
DBVDD
1.62 3.63 V
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PD, Rev 4.1, December 2011
5
5 Page 
Production Data
WM1824
On power down, PORB is asserted low whenever LINEVDD or AVDD drop below the
minimum threshold Vpora_low.
Test Conditions
LINEVDD = AVDD = DBVDD = 3.3V AGND = LINEGND = 0V, TA = +25oC
PARAMETER
SYMBOL
TEST CONDITIONS
Power Supply Input Timing Information
VDD level to POR defined
(LINEVDD/AVDD rising)
Vpora
Measured from LINEGND
VDD level to POR rising edge
(VMID rising)
Vpord_hi
Measured from LINEGND
VDD level to POR rising edge
(LINEVDD/AVDD rising)
Vpora_hi
Measured from LINEGND
VDD level to POR falling edge
(LINEVDD/AVDD falling)
Vpora_lo
Measured from LINEGND
Table 2 Power on Reset
Note: All values are simulated results
MIN TYP MAX UNIT
158
0.63 0.8
1
1.44 1.8 2.18
0.96 1.46 1.97
mV
V
V
V
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PD, Rev 4.1, December 2011
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet WM1824.PDF ] | |
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