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Product Detailed Parameters
- Description：IC CODEC STER 36 BALL W-CSP
- Series：-
- Mfr：Cirrus Logic Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Stereo Audio
- Data Interface：I2C, SPI
- Resolution (Bits)：24 b
- Sigma Delta：Yes
- S/N Ratio, ADCs / DACs (db) Typ：94 / 96
- Dynamic Range, ADCs / DACs (db) Typ：-
- Voltage - Supply, Analog：2.4V ~ 3.6V
- Voltage - Supply, Digital：1.62V ~ 1.98V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：36-WFBGA, WLCSP
- Supplier Device Package：36-W-CSP (2.97x3.07)
- Grade：-
- Qualification：-
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Overview
The WM8946ECS/R is a stereo low-power high-fidelity audio CODEC designed for portable devices. It features a 36-ball W-CSP package (2.97 x 3.07 mm) and supports I2C or SPI control interfaces. The device includes six analogue inputs, a two-channel digital microphone interface, and four analogue outputs comprising stereo line and mono BTL headphone/speaker drivers. Key electrical parameters include 94 dB ADC SNR and 96 dB DAC SNR (A-weighted). It operates with digital core supply DCVDD of 1.62 V to 1.98 V and analogue supplies up to 3.6 V. The component supports sample rates from 8 kHz to 48 kHz via I2S.
Feature Summary
- Integrated DSP functions including 3D-stereo enhancement, ReTune parametric filter, dynamic range control, and programmable filters.
- Built-in video buffer function for direct camera sensor interfacing.
- Flexible output mixing supporting single-ended and differential configurations with analogue bypass paths.
- Includes integrated LDO regulator, frequency locked loop (FLL), and digital beep generator.
Applications
- Digital Still Cameras (DSC)
- Multimedia phones
Procurement Notes
Verify the specific ordering suffix 'ECS/R' against the manufacturer's current datasheet revision to confirm package type and tape-and-reel quantity. Ensure compatibility with system voltage requirements, specifically the 1.62 V to 1.98 V digital core supply and up to 3.6 V analogue supplies. Confirm that the 36-ball W-CSP footprint matches the PCB layout design.
Selection Notes
Select this component for applications requiring integrated video buffering alongside audio processing in a compact form factor. Consider the power supply constraints, as the device requires distinct digital and analogue rails. Evaluate the need for the specific DSP features like ReTune if acoustic compensation is required for the target housing or speaker components.
Part Context
The WM8946 belongs to Cirrus Logic's low-power CODEC family, often utilized in mobile and imaging devices where space is limited. It succeeds earlier Wolfson Microelectronics designs, maintaining compatibility with similar functional blocks while offering updated packaging and integration levels suitable for modern portable electronics.
Replacement Considerations
WM8945: Mono variant with touch panel controller. WM8948: Stereo variant with touch panel controller. WM8980: Includes speaker driver and video buffer.
