TP3069 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – Enhanced' Serial Interface CMOS CODEC/Filter COMBO

September 1994
TP3069
‘‘Enhanced’’ Serial Interface
CMOS CODEC Filter COMBO
General Description
The TP3069 (A-law) is a monolithic PCM CODEC Filter uti-
lizing the A D and D A conversion architecture shown in
Figure 1 and a serial PCM interface The device is fabricat-
ed using National’s advanced double-poly CMOS process
(microCMOS)
Similar to the TP305X family this device features an addi-
tional Receive Power Amplifier to provide push-pull bal-
anced output drive capability The receive gain can be ad-
justed 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 TS_X out-
put
Note See also AN-370 ‘‘Techniques for Designing with CODEC Filter
COMBO Circuits ’’
COMBO and TRI-STATE are registered trademarks of National Semiconductor Corp
Features
Y _{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
A-law compatible COder and DECoder
Internal precision voltage reference
Serial I O interface
Internal auto-zero circuitry
Receive push-pull power amplifiers
Y _{Designed for D3 D4 and CCITT applications}
Y g_{5V operation}
Y _{Low operating power typically 70 mW}
Y _{Power-down standby mode typically 3 mW}
Y _{Automatic power-down}
Y _{TTL or CMOS compatible digital interfaces}
Y _{Maximizes line interface card circuit density}
Block Diagram
C1995 National Semiconductor Corporation TL H 10578
FIGURE 1
TL H 10578 – 1
RRD-B30M115 Printed in U S A