nsc05173 National Semiconductor Corporation, nsc05173 Datasheet

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nsc05173

Manufacturer Part Number
nsc05173
Description
Tp3040, Tp3040a Pcm Monolithic Filter
Manufacturer
National Semiconductor Corporation
Datasheet
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 600X)
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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nsc05173 Summary of contents

Page 1

... The receive filter approximates the func- tion required to compensate for the degraded frequency re- sponse and restore the flat passband response Block Diagram C 1995 National Semiconductor Corporation TL H 6660 Features Designed for D3 D4 and CCITT applications Y ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltages Power Dissipation Input Voltage Voltage at Any Input a or Output ...

Page 3

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

Page 4

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

Page 5

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

Page 6

Connection Diagrams Dual-In-Line Package Top View Order Number TP3040J or TP3040AJ See NS Package J16A or TP3040N or TP3040AN See NS Package N16A Description of Pin Functions Symbol Function The non-inverting input to the transmit filter x ...

Page 7

Functional Description The TP3040 TP3040A monolithic filter contains four main sections Transmit Filter Receive Filter Receive Filter Pow- er Amplifier and Frequency Divider Select Logic ( Figure brief description of the circuit operation for each section is ...

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 ...

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