TP3057 National Semiconductor, TP3057 Datasheet

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TP3057

Manufacturer Part Number
TP3057
Description
Manufacturer
National Semiconductor
Datasheet

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C 1995 National Semiconductor Corporation
TP3054 TP3057
‘‘Enhanced’’ Serial Interface
CODEC Filter COMBO Family
General Description
The TP3054 TP3057 family consists of
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 ad-
vanced double-poly CMOS process (microCMOS)
The encode portion of each device consists of an input gain
adjust amplifier an active RC pre-filter which eliminates very
high frequency noise prior to entering a switched-capacitor
band-pass filter that rejects signals below 200 Hz and above
3400 Hz Also included are auto-zero circuitry and a com-
panding coder which samples the filtered signal and en-
codes it in the companded -law or A-law PCM format The
decode portion of each device consists of an expanding
decoder which reconstructs the analog signal from the
companded
corrects for the sin x x response of the decoder output and
rejects signals above 3400 Hz followed by a single-ended
power amplifier capable of driving low impedance loads
The devices require two 1 536 MHz 1 544 MHz or 2 048
MHz transmit and receive master clocks which may be
asynchronous transmit and receive bit clocks which may
vary from 64 kHz to 2 048 MHz and transmit and receive
frame sync pulses The timing of the frame sync pulses and
PCM data is compatible with both industry standard formats
Connection Diagrams
COMBO and TRI-STATE are registered trademarks of National Semiconductor Corporation
Order Number TP3054WM or TP3057WM
Order Number TP3054N or TP3057N
Order Number TP3054J or TP3057J
See NS Package Number M16B
See NS Package Number N16A
See NS Package Number J16A
-law or A-law code a low-pass filter which
Dual-In-Line Package
Top View
TL H 5510
-law and A-law
TL H 5510– 1
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Complete CODEC and filtering system (COMBO)
including
A-law 16-pin TP3057
Designed for D3 D4 and CCITT applications
Low operating power typically 50 mW
Power-down standby mode typically 3 mW
Automatic power-down
TTL or CMOS compatible digital interfaces
Maximizes line interface card circuit density
Dual-In-Line or surface mount packages
See also AN-370 ‘‘Techniques for Designing with
CODEC Filter COMBO Circuits’’
g
-law 16-pin TP3054
5V operation
Transmit high-pass and low-pass filtering
Receive low-pass filter with sin x x correction
Active RC noise filters
Internal precision voltage reference
Serial I O interface
Internal auto-zero circuitry
-law or A-law compatible COder and DECoder
See NS Package Number V20A
Order Number TP3057V
Plastic Chip Carriers
Top View
RRD-B30M125 Printed in U S A
August 1994
TL H 5510– 10

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TP3057 Summary of contents

Page 1

... Serial Interface CODEC Filter COMBO Family General Description The TP3054 TP3057 family consists of 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 ad- ...

Page 2

Block Diagram Pin Description Symbol Function V Negative power supply pin GNDA Analog ground All signals are referenced to this pin VF O Analog output of the receive power ampli- R fier ...

Page 3

... ASYNCHRONOUS OPERATION For asynchronous operation separate transmit and receive clocks may be applied MCLK and 048 MHz for the TP3057 or 1 536 MHz 1 544 MHz for the X R TP3054 and need not be synchronous For best transmis- sion performance however MCLK with MCLK ...

Page 4

... The receive section consists of an expanding DAC which drives a fifth order switched-capacitor low pass filter clocked at 256 kHz The decoder is A-law (TP3057) or -law (TP3054) and the 5th order low pass filter corrects for the sin x x attenuation due to the 8 kHz sample hold The ...

Page 5

... Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications V to GNDA GNDA BB Voltage at any Analog Input or Output Electrical Characteristics ...

Page 6

Timing Specifications Unless otherwise noted limits printed in BOLD characters are guaranteed for correlation with 100% electrical testing ...

Page 7

Timing Diagrams 7 ...

Page 8

Timing Diagrams (Continued) 8 ...

Page 9

... Unless otherwise noted limits printed in BOLD characters are guaranteed for correlation with 100% electrical testing Conditions Nominal 0 dBm0 Level is 4 dBm (600 ) 0 dBm0 Max Overload Level TP3054 (3 17 dBm0) TP3057 (3 14 dBm0 ...

Page 10

... Hz– 2600 2600 Hz– 2800 2800 Hz– 3000 Hz e TP3054 TP3057 PCM Code is Alternating Positive and Negative Zero TP3054 PCM Code Equals Positive Zero TP3057 f 0 kHz to 100 kHz Loop Around e Measurement Vrms dBm0 e b ...

Page 11

... Units dBC 36 dBC 29 dBC 30 dBC 14 dBC 15 dBC TP3057 A-Law (Includes Even Bit Inversion ...

Page 12

Applications Information POWER SUPPLIES While the pins of the TP305X family are well protected against electrical misuse it is recommended that the stan- dard CMOS practice be followed ensuring that ground is connected to the device before any other connections ...

Page 13

Applications Information (Continued) TABLE II Attentuator Tables for ...

Page 14

... Connection Diagrams (Continued) Plastic Chip Carrier TL H 5510 – 7 Top View Order Number TP3057V See NS Package Number V20A 14 ...

Page 15

... Physical Dimensions inches (millimeters) Order Number TP3054WM or TP3057WM Cavity Dual-In-Line Package (J) Order Number TP3054J or TP3057J NS Package Number J16A Molded Small Outline Package (WM) NS Package Number M16B 15 ...

Page 16

... Physical Dimensions inches (millimeters) (Continued) Order Number TP3054N or TP3057N LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or ...

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