TP3040 NSC [National Semiconductor], TP3040 Datasheet

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TP3040

Manufacturer Part Number
TP3040
Description
TP3040, TP3040A PCM Monolithic Filter
Manufacturer
NSC [National Semiconductor]
Datasheet

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C 1995 National Semiconductor Corporation
TP3040 TP3040A PCM Monolithic Filter
General Description
The TP3040 TP3040A filter is a monolithic circuit contain-
ing both transmit and receive filters specifically designed for
PCM CODEC filtering applications in 8 kHz sampled sys-
tems
The filter is manufactured using microCMOS technology
and switched capacitor integrators are used to simulate
classical LC ladder filters which exhibit low component sen-
sitivity
TRANSMIT FILTER STAGE
The transmit filter is a fifth order elliptic low pass filter in
series with a fourth order Chebyshev high pass filter It pro-
vides a flat response in the passband and rejection of sig-
nals below 200 Hz and above 3 4 kHz
RECEIVE FILTER STAGE
The receive filter is a fifth order elliptic low pass filter de-
signed to reconstruct the voice signal from the decoded de-
multiplexed signal which as a result of the sampling pro-
cess is a stair-step signal having the inherent sin x x fre-
quency response The receive filter approximates the func-
tion required to compensate for the degraded frequency re-
sponse and restore the flat passband response
Block Diagram
TL H 6660
FIGURE 1
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Designed for D3 D4 and CCITT applications
Low power consumption
Power down mode 0 5 mW
20 dB gain adjust range
No external anti-aliasing components
Sin x x correction in receive filter
50 60 Hz rejection in transmit filter
TTL and CMOS compatible logic
All inputs protected against static discharge due to
handling
a
5V
45 mW (0 dBm0 into 600 )
30 mW (power amps disabled)
b
5V power supplies
RRD-B30M115 Printed in U S A
September 1994
TL H 6660 – 1

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TP3040 Summary of contents

Page 1

... TP3040 TP3040A PCM Monolithic Filter General Description The TP3040 TP3040A filter is a monolithic circuit contain- ing both transmit and receive filters specifically designed for PCM CODEC filtering applications in 8 kHz sampled sys- tems The filter is manufactured using microCMOS technology and switched capacitor integrators are used to simulate ...

Page 2

... CLK0 and PWRI 5 25V (Note All other pins at GND (0V) TP3040 TP3040A V 5 25V V 5 25V CLK0 and PWRI 5 25V (Note All other pins at GND (0V) TP3040 TP3040A PWRI V Power Amp Inactive e BB PWRI V Power Amp Inactive e BB (Note 1) (Note ...

Page 3

... Below 200 Hz (TP3040A) 200 Hz (TP3040) 300 kHz (TP3040A) 300 kHz (TP3040 kHz 3 4 kHz 4 0 kHz 4 6 kHz and Above 0 16 Vrms 1 kHz Signal Applied Gain 10k ...

Page 4

... I Connected to GNDA kHz (TP3040A kHz (TP3040 Below 300 Hz 300 kHz (TP3040A) b 300 kHz (TP3040 kHz 3 4 kHz 4 0 kHz 4 6 kHz and Above f 1 kHz Vrms Input to Sin x x Filter f 1 kHz R 10k ...

Page 5

AC Electrical Characteristics Unless otherwise specified All parameters are specified for a signal level of 0 dBm0 at 1 kHz The 0 dBm0 level assumed Vrms measured at the output ...

Page 6

... CLK Master input clock Input frequency can be se- lected as 2 048 MHz 1 544 MHz or 1 536 MHz PDN The input pin used to power down the TP3040 TP3040A during idle periods Logic 1 (V voltage causes a power down condition An inter- nal pull-up is provided ...

Page 7

... CODEC during sampling Optimum noise and distortion performance will be obtained from the TP3040 TP3040A filter when operated with sys- tem peak overload voltages of and VF O When interfacing to a PCM CODEC with a peak ...

Page 8

Typical Performance Characteristics Transmit Filter Stage Receive Filter Stage TL H 6660– 5 FIGURE 6660 – 6 ...

Page 9

... Physical Dimensions Order Number TP3040J or TP3040AJ Order Number TP3040N or TP3040AN Ceramic Dual-In-Line Package (J) NS Package Number J16A Molded Dual-In-Line Package (M) NS Package Number N16A 9 ...

Page 10

... Physical Dimensions (Continued) Order Number TP3040V or TP3040AV 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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