TP3069

TP3069 ‘‘Enhanced’’ Serial Interface CMOS CODEC Filter COMBO September 1994 TP3069 ‘‘Enhanced’’ Serial Interface CMOS CODEC Filter COMBO General Description The TP3069 (A-law) is a monolithic PCM CODEC Filter utilizing the A D and D A conversion architecture shown in Figure 1 and a serial PCM interface The device is fabricated using National’s advanced double-poly CMOS process (microCMOS) Similar to the TP305X family this device features an additional Receive Power Amplifier to provide push-pull balanced output drive capability The receive gain can be adjusted by means of two external resistors for an output level of up to g 6 6V across a balanced 600X load Also included is an Analog Loopback switch and a TSX output Note See also AN-370 ‘‘Techniques for Designing with CODEC Filter COMBO Circuits ’’ Features Y Y Y Y Y Y Y Y Complete CODEC and filtering system including Transmit high-pass and low-pass filtering Receive low-pass filter with sin x x correction Active RC noise filters A-law compatible COder and DECoder Internal precision voltage reference Serial I O interface Internal auto-zero circuitry Receive push-pull power amplifiers Designed for D3 D4 and CCITT applications g 5V operation Low operating power typically 70 mW Power-down standby mode typically 3 mW Automatic power-down TTL or CMOS compatible digital interfaces Maximizes line interface card circuit density COMBO and TRI-STATE are registered trademarks of National Semiconductor Corp Block Diagram TL H 105...