TP3054-X NSC [National Semiconductor], TP3054-X Datasheet

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TP3054-X

Manufacturer Part Number
TP3054-X
Description
Extended Temperature Serial Interface CODEC/Filter COMBO Family
Manufacturer
NSC [National Semiconductor]
Datasheet
© 2005 National Semiconductor Corporation
TP3054-X, TP3057-X
Extended Temperature Serial Interface CODEC/Filter
COMBO
General Description
The TP3054, TP3057 family consists of µ-law and A-law
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 µ-law or A-law PCM format. The
decode portion of each device consists of an expanding
decoder, which reconstructs the analog signal from the com-
panded µ-law or A-law code, a low-pass filter which 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 de-
vices require two 1.536 MHz, 1.544 MHz or 2.048 MHz
transmit and receive master clocks, which may be asynchro-
nous; 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
NS Package Number V20A
Order Number TP3057V-X
®
®
Plastic Chip Carriers
are registered trademarks of National Semiconductor Corporation.
Family
Top View
DS008674
00867408
Features
n −40˚C to +85˚C operation
n Complete CODEC and filtering system (COMBO)
n µ-law, 16-pin — TP3054
n A-law, 16-pin — TP3057
n Designed for D3/D4 and CCITT applications
n
n Low operating power — typically 50 mW
n Power-down standby mode — typically 3 mW
n Automatic power-down
n TTL or CMOS compatible digital interfaces
n Maximizes line interface card circuit density
n Dual-In-Line or PCC surface mount packages
n See also AN-370, “Techniques for Designing with
including:
CODEC/Filter COMBO Circuits”
— Transmit high-pass and low-pass filtering
— Receive low-pass filter with sin x/x correction
— Active RC noise filters
— µ-law or A-law compatible COder and DECoder
— Internal precision voltage reference
— Serial I/O interface
— Internal auto-zero circuitry
±
5V operation
Order Number TP3054WM-X
NS Package Number M16B
NS Package Number N16E
Order Number TP3054N-X
Dual-In-Line Package
Top View
00867401
www.national.com
March 2005

Related parts for TP3054-X

TP3054-X Summary of contents

Page 1

... TP3054-X, TP3057-X Extended Temperature Serial Interface CODEC/Filter COMBO ® Family General Description The TP3054, TP3057 family consists of µ-law and A-law 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) ...

Page 2

Block Diagram Pin Descriptions Symbol Function V Negative power supply pin. BB ± −5V 5%. BB GNDA Analog ground. All signals are referenced to this pin Analog output of the receive power R amplifier. V Positive ...

Page 3

... ASYNCHRONOUS OPERATION For asynchronous operation, separate transmit and receive clocks may be applied. MCLK 2.048 MHz for the TP3057, or 1.536 MHz, 1.544 MHz for the TP3054, and need not be synchronous. For best transmis- sion performance, however, MCLK with MCLK X logic levels to the MCLK ...

Page 4

... The decoder is A-law (TP3057) or µ-law (TP3054) and the 5th order low pass filter corrects for the sin x/x attenuation due to the 8 kHz sample/hold. The filter is then followed by a 2nd order RC active post-filter/power amplifier capable of driving a 600Ω ...

Page 5

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

Page 6

Timing Specifications Unless otherwise noted, limits printed in BOLD characters are guaranteed for V −40˚C to +85˚C by correlation with 100% electrical testing at T production tests and/or product design and characterization. All signals referenced to GNDA. Typicals specified at ...

Page 7

7 www.national.com ...

Page 8

www.national.com 8 ...

Page 9

... Receive Gain Variations with RRL Level = 25˚C. All other limits are assured by correlation with other A = +5.0V Conditions Nominal 0 dBm0 Level is 4 dBm (600Ω) 0 dBm0 Max Overload Level TP3054 (3.17 dBm0) TP3057 (3.14 dBm0) T =25˚C, V =5V, V =− Input dBm0 at 1020 Hz x ...

Page 10

... Hz−1000 Hz RA f=1000 Hz−1600 Hz f=1600 Hz−2600 Hz f=2600 Hz−2800 Hz f=2800 Hz−3000 Hz TP3054 (Note 3) TP3057 (Note 3) PCM Code is Alternating Positive and Negative Zero — TP3054 TP3057 PCM Code Equals Positive Zero — f=0 kHz to 100 kHz, Loop Around + Measurement Vrms X V =5.0 V +100 mVrms ...

Page 11

... Note 4: PPSR , NPSR , and CT are measured with a −50 dBm0 activation signal applied R–X Note 5: TP3054/57 are measured using C message weighted filter for µ-law and psophometric weighted filter for A-law. Note 1.544 MHz MCLK freq. is −70 dB max. 50% X–R X (Continued) = 25˚ ...

Page 12

Applications Information POWER SUPPLIES While the pins of the TP3050 family are well protected against electrical misuse 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 π-Pad Attenuator Note: See Application Note 370 for further details. dB 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 (Continued) TABLE 2. Attentuator Tables for Z1=Z2=300Ω (All ...

Page 14

Typical Synchronous Application www.national.com FIGURE 4. 14 00867406 ...

Page 15

... Physical Dimensions inches (millimeters) unless otherwise noted Dual-In-Line Package (M) Order Number TP3054WM-X NS Package Number M16B Molded Dual-In-Line Package (N) Order Number TP3054N-X NS Package Number N16E 15 www.national.com ...

Page 16

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry ...

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