Description

The ETC5057D is a monolithic PCM CODEC/filter in the Interface - CODECs product category. It utilizes the A/D and D/A conversion architecture and features a serial PCM interface. The device is fabricated using doublepoly CMOS process. The encode portion of the ETC5057D consists of an input gain adjust amplifier, an active RC pre-filter, a switched-capacitor band-pass filter, auto-zero circuitry, and a companding coder. It supports both A-law and µ-law PCM formats.

Specifications and features

• 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

Application Scenarios

The ETC5057D is commonly used in various communication systems and equipment where PCM encoding and decoding is required. It can be used in telecommunication devices, voice processing systems, line interface cards, and more.

Comparison

• Supports both A-law and µ-law PCM formats
• Low power consumption
• Wide operating temperature range
• Compact design for maximized circuit density

• No specific disadvantages found