●The TP3064 (µ-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 Nationals 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 g6.6V 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."
● 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
● µ-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
● µ-lawTP3064
● A-lawTP3067
● Designed for D3/D4 and CCITT applications
● ±5V operation
● Low operating powertypically 70 mW
● Power-down standby modetypically 3 mW
● Automatic power-down
● TTL or CMOS compatible digital interfaces
● Maximizes line interface card circuit density
