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TP3057N 数据表(PDF) 1 Page - National Semiconductor (TI) |
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TP3057N 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 16 page TLH5510 August 1994 TP3054 TP3057 ‘‘Enhanced’’ Serial Interface CODECFilter COMBO Family General Description The TP3054 TP3057 family consists of m-law and A-law monolithic PCM CODECfilters utilizing the AD and DA conversion architecture shown in Figure 1 and a serial PCM interface The devices are fabricated using National’s ad- vanced 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 com- panding coder which samples the filtered signal and en- codes 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 xx 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 1536 MHz 1544 MHz or 2048 MHz transmit and receive master clocks which may be asynchronous transmit and receive bit clocks which may vary from 64 kHz to 2048 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 Y Complete CODEC and filtering system (COMBO) including Transmit high-pass and low-pass filtering Receive low-pass filter with sin xx correction Active RC noise filters m -law or A-law compatible COder and DECoder Internal precision voltage reference Serial IO interface Internal auto-zero circuitry Y m -law 16-pinTP3054 Y A-law 16-pinTP3057 Y Designed for D3D4 and CCITT applications Y g 5V operation Y Low operating powertypically 50 mW Y Power-down standby modetypically 3 mW Y Automatic power-down Y TTL or CMOS compatible digital interfaces Y Maximizes line interface card circuit density Y Dual-In-Line or surface mount packages Y See also AN-370 ‘‘Techniques for Designing with CODECFilter COMBO Circuits’’ Connection Diagrams Dual-In-Line Package TLH5510 – 1 Top View Order Number TP3054J or TP3057J See NS Package Number J16A Order Number TP3054N or TP3057N See NS Package Number N16A Order Number TP3054WM or TP3057WM See NS Package Number M16B Plastic Chip Carriers TLH5510 – 10 Top View Order Number TP3057V See NS Package Number V20A COMBO and TRI-STATE are registered trademarks of National Semiconductor Corporation C1995 National Semiconductor Corporation RRD-B30M125Printed in U S A |
类似零件编号 - TP3057N |
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类似说明 - TP3057N |
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