TP3057WM Electronic IC Chips Enhanced Serial Interface CODEC
electronic integrated circuit
,linear integrated circuits
TP3054, TP3057
‘‘Enhanced’’ Serial Interface CODEC/Filter COMBOÉ Family
General Description
The TP3054, TP3057 family consists of m-law and A-law monolithic PCM CODEC/filters utilizing the A/D and D/A conversion architecture shown inFigure 1, and a serial PCM interface. The devices are fabricated using National’s advanced double-poly CMOS process (microCMOS).
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 m-law or A-law PCM format.
The decode portion of each device consists of an expanding decoder, which reconstructs the analog signal from the companded m-law or A-law code, a low-pass filter which corrects for the sin x/x response of the decoder output and rejects signals above 3400 Hz followed by a single-ended power amplifier capable of driving low impedance loads.
The devices require two 1.536 MHz, 1.544 MHz or 2.048 MHz transmit and receive master clocks, which may be asynchronous; transmit and receive bit clocks, which may vary from 64 kHz to 2.048 MHz; and transmit and receive frame sync pulses. The timing of the frame sync pulses and PCM data is compatible with both industry standard formats.
Features
- Complete CODEC and filtering system (COMBO) including:
- Transmit high-pass and low-pass filtering
- Receive low-pass filter with sin x/x correction
- Active RC noise filters
- m-law or A-law compatible COder and DECoder
- Internal precision voltage reference
- Serial I/O interface
- Internal auto-zero circuitry
- m-law, 16-pin----TP3054
- A-law, 16-pin----TP3057
- Designed for D3/D4 and CCITT applications
- ±5V operation
- Low operating power----typically 50 mW
- Power-down standby mode----typically 3 mW
- Automatic power-down
- TTL or CMOS compatible digital interfaces
- Maximizes line interface card circuit density
- Dual-In-Line or surface mount packages
- See also AN-370, ‘‘Techniques for Designing with CODEC/Filter COMBO Circuits’’
Absolute Maximum Ratings
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
VCC to GNDA 7V
VBB to GNDA -7V
Voltage at any Analog Input or Output VCC +0.3V to VBB -0.3V
Voltage at any Digital Input or Output VCC +0.3V to GNDA -0.3V
Operating Temperature Range -25℃ to +125℃
Storage Temperature Range -65℃ to +150℃
Lead Temperature (Soldering, 10 seconds) 300℃
ESD (Human Body Model) 2000V
Latch-Up Immunity ---- 100 mA on any Pin
Connection Diagrams
Block Diagram
Stock Offer (Hot Sell)
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