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TP3052-X Datasheet

  • TP3052-X

  • Extended Temperature Serial Interface CODEC/Filter COMBO Fam...

  • 668.92KB

  • 16頁

  • NSC

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TP3054-X, TP3057-X Extended Temperature Serial Interface CODEC/Filter COMBO Family
March 2005
TP3054-X, TP3057-X
Extended Temperature Serial Interface CODEC/Filter
COMBO
廬
Family
General Description
The TP3054, TP3057 family consists of 碌-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鈥檚 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 碌-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 碌-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.
Features
n
鈭?0藲C to +85藲C operation
n
Complete CODEC and filtering system (COMBO)
including:
鈥?Transmit high-pass and low-pass filtering
鈥?Receive low-pass filter with sin x/x correction
鈥?Active RC noise filters
鈥?碌-law or A-law compatible COder and DECoder
鈥?Internal precision voltage reference
鈥?Serial I/O interface
鈥?Internal auto-zero circuitry
n
碌-law, 16-pin 鈥?TP3054
n
A-law, 16-pin 鈥?TP3057
n
Designed for D3/D4 and CCITT applications
n
鹵
5V operation
n
Low operating power 鈥?typically 50 mW
n
Power-down standby mode 鈥?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, 鈥淭echniques for Designing with
CODEC/Filter COMBO Circuits鈥?/div>
Connection Diagrams
Plastic Chip Carriers
Dual-In-Line Package
00867401
00867408
Top View
Order Number TP3057V-X
NS Package Number V20A
Top View
Order Number TP3054N-X
NS Package Number N16E
Order Number TP3054WM-X
NS Package Number M16B
COMBO
廬
and TRI-STATE
廬
are registered trademarks of National Semiconductor Corporation.
漏 2005 National Semiconductor Corporation
DS008674
www.national.com

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  • 英文版
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