Features: • DAC SNR 98dB, THD -95dB ('A' weighted @ 48kHz, 3.3V)
• On-chip 400mW BTL Speaker Driver (mono)
• On-chip Headphone Driver° 40mW output power on 16 / 3.3V° THD 80dB at 20mW, SNR 90dB with 16 load
• Stereo and Mono Line-in mix into DAC output
• SeparatelyM ixed Stereo and Mono Outputs
• Digital Tone Control and Bass Boost
• Low Power° Down to 7mW for stereo playback (1.8V / 1.5V supplies)° 10W StandbyM ode
• Low SupplyV oltages° Analogue 1.8V to 3.6V° Digital core: 1.42V to 3.6V° Digital I/O: 1.42V to 3.6V
• Master clocks supported: GSM, CDMA, PDC, USB orstandard audio clocks
• Audio sample rates supported: 8, 11.025, 12, 16, 22.05, 24,32, 44.1, 48, 88.2, 96kHz
• 32-pin QFN package, 5x5x0.9mm size, 0.5mm lead pitchApplication• Smartphone / Multimedia Phone
• Digital Audio PlayerPinout
Specifications
| CONDITION |
MIN |
MAX |
| DBVDD, DCVDD, AVDD supply voltages |
-0.3V |
+3.63V |
| Voltage range digital inputs |
DGND -0.3V |
DVDD +0.3V |
| Voltage range analogue inputs |
AGND -0.3V |
AVDD +0.3V |
| Operating temperature range, TA |
-25°C |
+85°C |
| Storage temperature prior to soldering |
30oC max / 85% RH max |
| Storage temperature after soldering |
-65°C |
+150°C |
| Package bodytem perature (soldering 10 seconds) |
|
+260°C |
| Package bodytem perature (soldering 2 minutes) |
|
+183°C |
DescriptionThe WM8955L is a low power, high qualitys tereo DAC withintegrated headphone and loudspeaker amplifiers, designedto reduce external component requirements in portable digitalaudio applications.
The on-chip headphone amplifiers can deliver 40mW into a16 load. Advanced on-chip digital signal processingperforms bass and treble tone control.
The WM8955L can operate as a master or a slave, andincludes an on-chip PLL. It can use most master clockfrequencies commonlyfound in portable systems, includingUSB, GSM, CDMA or PDC clocks, or standard 256fs clockrates. Different audio sample rates such as 48kHz, 44.1kHz,8kHz and manyot hers are supported.
The WM8955L operates on supplyv oltages from 1.8V up to3.6V, although the digital core can operate on a separatesupplydow n to 1.42V, saving power. Different sections of thechip can also be powered down under software control.The WM8955L is supplied in a verys mall and thin 5x5mmQFN package, ideal for use in hand-held and portablesystems.
WM8955L Data Sheet
