STLC7550 datasheet(1/17 Pages) STMICROELECTRONICS

部件名	STLC7550

功能描述	LOW POWER LOW VOLTAGE ANALOG FRONT END

PDF	17 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 17 page

STLC7550

LOW POWER LOW VOLTAGE ANALOG FRONT END

November 1998

TQFP44 (10 x 10 x 1.40 mm)

(Full Plastic Quad Flat Pack)

ORDER CODE : STLC7550TQFP

.

GENERAL PURPOSE SIGNAL PROCESSING

ANALOG FRONT END (AFE)

.

TARGETED

FOR

V.34bis

MODEM

AND

56Kbps MODEM APPLICATIONS

.

16-BIT OVERSAMPLING

Σ∆ A/D AND D/A

CONVERTERS

.

83dB SIGNAL TO NOISE RATIO FOR SAM-

PLING FREQUENCY UP TO 9.6kHz @ 3V

.

87dB DYNAMIC RANGE @ 3V

.

FILTER BANDWIDTHS :

0.425 x THE SAMPLING FREQUENCY

.

ON-CHIP REFERENCE VOLTAGE

.

SINGLE POWER SUPPLY RANGE :

2.7 TO 5.5V

.

LOW POWER CONSUMPTION LESS THAN

30mW OPERATING POWER 3V

.

STAND-BY MODE POWER CONSUMPTION

LESS THAN 3

µW at 3V

.

PROGRAMMING SAMPLING FREQUENCY

.

MAX. SAMPLING FREQUENCY : 45kHz

.

SYNCHRONOUS SERIAL INTERFACE FOR

PROCESSOR DATAS EXCHANGE. MASTER

OR SLAVE OPERATIONS

.

0.50

µm CMOS PROCESS

.

TQFP44 PACKAGE

.

STLC7546 MODE OF OPERATION COMPATIBLE

DESCRIPTION

The STLC7550 is a single chip Analog Front-end

(AFE) designed to implement modems up to

56Kbps.

It has been especially designed for host processing

application in which the modulation software

(V.34bis, 56Kbps) is performed by the main applica-

tion processor : Pentium, Risc or DSP processors.

The main target of this device is stand alone appli-

ances as Hand Held PC (HPC), Personnal Digital

Assistants (PDA), Webphones, Network Comput-

ers, Set Top Boxes for Digital Television (Satellite

and Cable).

To comply with such applications STLC7550 is

powered nominally at 3V only.

Maximum Power Dissipation 30mW is well suited

for Battery operations.

In case of battery low, STLC7550 will continue to

work even at a 2.7V level.

STLC7550 also provides clock generator for all

sampling frequencies requested for V.34bis and

56Kbps applications.

This new AFE can also be used for PC mother

boards or add-on cards or stand alone MODEMs.

It can be used in a master mode or slave mode.

The slave mode eases multi AFE architecture de-

sign in saving external logical glue.

TQFP48 (7 x 7 x 1.40mm)

(Full Plastic Quad Flat Pack)

ORDER CODE : STLC7550TQF7

1/17

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