TP3064

TP3064 TP3067 ‘‘Enhanced’’ Serial Interface CMOS CODEC Filter COMBO October 1991 TP3064 TP3067 ‘‘Enhanced’’ Serial Interface CMOS CODEC Filter COMBO General Description The TP3064 (m-law) and TP3067 (A-law) are monolithic PCM CODEC Filters utilizing the A D and D A conversion architecture shown in Figure 1 and a serial PCM interface The devices are fabricated using National’s advanced double-poly CMOS process (microCMOS) Similar to the TP305X family these devices feature 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 See also AN-370 ‘‘Techniques for Designing with CODEC Filter COMBO Circuits ’’ Features Y Y Y Y Y Y Y Y Y COMBO tion and TRI-STATE are registered trademarks of National Semiconductor Corpora- 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 m-law or A-law compatible COder and DECoder Internal precision voltage reference Serial I O interface Internal auto-zero circuitry Receive push-pull power amplifiers m-law TP3064 A-law TP3067 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 i...