peculiarity
Complete codecs and filtering systems, including:
Transmit high-pass and low-pass filtering
Receive a low-pass filter for X/X correction
Active RC noise filter
μ or A-law compatible encoders and decoders
Internal precision voltage reference
Serial I/O interface
Internal automatic zero circuit
Receive a push-pull power amplifier
μ Law - TP3064
A Law - TP3067
Designed for D3/D4 and CCITT applications
± 5V operation
Low operating power is typically 70 milliwatts
Power-down standby mode, usually 3 megawatts
Automatic power off
TTL or CMOS compatible digital interface
Maximize circuit density of line interface cards
illustrate
The architecture of the A/D and D/A converters used by the TP3064 (μ-law) and TP3067 (A-law) monolithic PCM codecs/filters is shown in Figure 1, and a serial PCM interface. These devices all use the national advanced double-layer polysilicon CMOS process (microCMOS).
Similar to the TP305X family, these devices feature an additional receive power amplifier that provides push-pull balanced output drive capability. Adjust the receive gain through a balanced 600 ohm load ± a 6.6V output level via two external resistors.
An analog loopback switch and TS X# output are also included.
See also "Combined codec/filter circuit design techniques." ”AN - 370，