Enhanced Serial Interface CMOS CODEC/Filter COMBO
TP3064 TP3067 ‘‘Enhanced’’ Serial Interface CMOS CODEC Filter COMBO
October 1991
TP3064 TP3067 ‘‘Enhanced’’ Serial Int...
Description
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
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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...
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