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Professional supply Integrated circuit IC WM8974CGEFL Mono CODEC with Speaker Driver Audio Interface 24 b 24-QFN
Mono CODEC with Speaker Driver
Product Descriptions
The WM8974 is a low power, high quality mono CODEC designed for portable applications such as Digital Still Camera or Digital Voice Recorder.
The device integrates support for a differential or single ended mic, and includes drivers for speakers or headphone, and mono line output. External component requirements are reduced as no separate microphone or headphone amplifiers are required.
Advanced Sigma Delta Converters are used along with digital decimation and interpolation filters to give high quality audio at sample rates from 8 to 48ks/s. Additional digital filtering options are available in the ADC path, to cater for application filtering such as ‘wind noise reduction’, plus an advanced mixed signal ALC function with noise gate is provided. The digital audio interface supports A-law and -law companding.An on-chip PLL is provided to generate the required Master Clock from an external reference clock. The PLL clock can also be output if required elsewhere in the system.
The WM8974 operates at supply voltages from 2.5 to 3.6V, although the digital supplies can operate at voltages down to 1.71V to save power. The speaker and mono outputs use a separate supply of up to 5V which enables increased output power if required. Different sections of the chip can also be
powered down under software control by way of the selectable two or three wire control interface.
WM8974 is supplied in a very small 4x4mm QFN package, offering high levels of functionality in minimum board area, with high thermal performance.
Product Features
Mono CODEC:
Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1, 48kHz
DAC SNR 98dB, THD -84dB (‘A’-weighted @ 8 – 48ks/s)
ADC SNR 94dB, THD -83dB (‘A’-weighted @ 8 – 48ks/s)
On-chip Headphone/Speaker Driver with ‘cap-less’ connect
- 40mW output power into 16 / 3.3V SPKVDD
- BTL speaker drive 0.9W into 8 / 5V SPKVDD
Additional MONO Line output
Multiple analogue or ‘Aux’ inputs, plus analogue bypass path
Mic Preamps:
Differential or single end Microphone Interface
- Programmable preamp gain
- Psuedo-differential inputs with common mode rejection
- Programmable ALC / Noise Gate in ADC path
Low-noise bias supplied for electret microphones
OTHER FEATURES
5 band EQ (record or playback path)
Digital Playback Limiter
Programmable ADC High-Pass Filter (wind noise reduction)
Programmable ADC Notch Filter
On-chip PLL
Low power, low voltage
- 2.5V to 3.6V (digital: 1.71V to 3.6V)
- power consumption <10mA all-on 48ks/s mode
4x4x0.9mm 24 lead QFN package
Product Applications
Digital Still Camera Audio CODEC
Wireless VoIP and other communication handsets / headsets
Portable audio recorder
General Purpose low power audio CODEC
Specifications
Attribute | Attribute value |
ANSM-Part# | ANSM-WM8974CGEFL |
Category | Integrated Circuits (ICs) |
Interface | |
CODECS | |
Mfr | Cirrus Logic Inc. |
Series | - |
Package | Tray |
Product Status | Obsolete |
Type | Audio |
Data Interface | - |
Resolution (Bits) | 24 b |
Number of ADCs / DACs | 44927 |
Sigma Delta | Yes |
S/N Ratio, ADCs / DACs (db) Typ | 94 / 98 |
Dynamic Range, ADCs / DACs (db) Typ | - |
Voltage - Supply, Analog | 2.5V ~ 3.6V |
Voltage - Supply, Digital | 1.71V ~ 3.6V |
Operating Temperature | -40°C ~ 85°C |
Mounting Type | Surface Mount |
Package / Case | 24-VFQFN Exposed Pad |
Supplier Device Package | 24-QFN (4x4) |
Base Product Number | WM8974 |
Actual product photos
Product Data Book:
For more product information, please download the PDF
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