AK7719ECB

DSP Floating-Point 24Bit

GENERAL DESCRIPTION

The AK7719 is a highly integrated digital signal processor DSP with four digital interface ports. AKM’s DSP core is optimized for both narrowband and wideband voice processing, as well as full bandwidth digital audio processing. An integrated clock generator for the DSP master clock eliminates the need for external clocks. The RAM-based DSP can be programmed for user requirements. The AK7719 is housed in a 25-pin CSP package. It is a very low power device, suitable for mobile applications.

FEATURES

□ Embedded DSP

\- Flexible programming with built-in program and data memories

\- Hardware accelerator

\- Word length: 24-bits Data RAM 24-bit floating point

\- Multiplier 20 x 20 Æ 40-bits double precision available

\- Divider 20 / 20 Æ 20-bits

\- ALU: 44-bit arithmetic operation with 4-bit overflow margin

24-bit floating point arithmetic and logic operation

\- Program RAM: 4096w x 36-bits

\- Coefficient RAM: 2048w x 20-bits

\- Data RAM: 2048w x 24-bits 24-bit floating point

\- Offset Register: 32w x 15-bits

\- Delay RAM: 16384w x 24-bits24-bit floating point

\- 5625 steps at 16kHz sampling rate, 1875 steps at 48kHz sampling rate

\- Internal clock generator

□ Audio Interface Format

\- 24-bit Left justified, I2S,

\- 16/24bit linear, 8-bit A-law, 8-bit µ-law PCM

\- Sampling rate 8kHz ~ 48kHz

\- Up/Down Sampling rate converter for Port#2 8kHz → 16kHz

□ μC I/F: I2C-Compatible, SPI

□ Operational, Sleep, Power down

□ Power Supply

VDD DSP Core: 1.2V ±0.1V

TVDD PCM I/F: 1.6V ~ 3.6V

□ Operating Temperature Range: -20°C ~ 85°C

□ Package: 25-Pin WL-CSP 2.62mm x2.93mm, 0.5mm pitch

□ Power Consumption: 6.2mA 7.5mW typ. Narrowband Hands Free mode operation