ETC5057集成电路（IC）的编解码器规格书PDF中文资料

ETC5057属于集成电路（IC）的编解码器。由意法半导体集团制造生产的ETC5057编解码器编解码器是用于通过压缩和解压缩来转换数据的半导体器件。数据压缩可提高传输速度并减少存储空间。某些编解码器提供高达 32 位的分辨率，并且分别提供多达 6 个或 8 个模数转换器和数模转换器。除三角积分调制外，还有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 数据接口。

DESCRIPTION

The ETC5057/ETC5054 family consists of A-law and µ–law monolithic PCM CODEC/filters utilizing the A/D and D/A conversion architecture shown in the block diagram below, and a serial PCM interface. The devices are fabricated using doublepoly CMOS process. The encode portion of each device consists of an input gain adjust amplifier, an active RC pre-filter which eliminates very high frequency noise prior to entering a switched-capacitor band-pass filter that rejects signals below 200 Hz and above 3400 Hz. Also included are auto-zero circuitry and a companding coder which samples the filtered signal and encodes it in the companded A-law or µ–law PCM format.

■ COMPLETE CODEC AND FILTERING SYSTEM (DEVICE) INCLUDING:

– Transmit high-pass and low-pass filtering.

– Receive low-pass filter with sin x/x correction.

– Active RC noise filters

– µ-law or A-law compatible COder and DECoder.

– Internal precision voltage reference.

– Serial I/O interface.

– Internal auto-zero circuitry.

■ A-LAW 16 PINS (ETC5057FN, 20 PINS)

■ µ-LAW WITHOUT SIGNALING, 16 PINS (ETC5054FN, 20 PINS)

■ MEETS OR EXCEEDS ALL D3/D4 AND CCITT SPECIFICATIONS

■ ±5V OPERATION

■ LOW OPERATING POWER - TYPICALLY 60 mW

■ POWER-DOWN STANDBY MODE - TYPICALLY 3 mW

■ AUTOMATIC POWER-DOWN

■ TTL OR CMOS COMPATIBLE DIGITAL INTERFACES

■ MAXIMIZES LINE INTERFACE CARD CIRCUIT DENSITY

■ 0 to 70°C OPERATION