Описание
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 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 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.”
- 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
