peculiarity
Complete codec and filtering system, including:
Transmission high-pass and low-pass filtering
Receive a low-pass filter with 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 push-pull power amplifier
μ Law - TP3064
Law A - TP3067
Designed for D3/D4 and CCITT applications
± 5V operation
Low operating power is typically 70 milliwatts
Power-down standby mode, typically 3 MW
Automatic power off
TTL or CMOS compatible digital interface
Line interface card circuit density is maximized
illustrate
The architecture of the A/D and D/A converters used in the TP3064 (μ-law) and TP3067 (A-law) monolithic PCM codecs/filters is shown in Figure 1, with 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 to provide push-pull balanced output drive capability. Adjustable receive gain can be achieved through two external resistors through a balanced 600 ohm load ± 6.6V output level.
Also included is an analog loopback switch and TS X# output.
See also "Codec/Filter Combination Circuit Design Techniques." ”AN - 370，