E-STLC7550TQF7 Datasheet E-STLC7550TQF7, STLC7550TQF7 | P1-P3

February 2006 Rev 9 1/24

STLC7550

Low Power Low Voltage Analog Front End

Features

■ 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 sampling

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

3mW at 3V

■ Programming sampling frequency

■ Max. sampling frequency : 45kHz

■ Synchronous serial interface for processor

datas exchange Master or Slave operations

■ 0.50µm CMOS process

■ TQFP48 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 application processor : Pentium, Risc or

DSP processors.

The main target of this device is stand alone

appliances as Hand Held PC (HPC), Personnal

Digital Assistants (PDA), Webphones, Network

Computers, 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

design in saving external logical glue.

Order codes

(*) ECOPACK

(see Section 6)

TQFP48 (7 x 7 x 1.4mm)

(Full Plastic Quad Flat Pack)

Part number Temp range, °CPackage Packing

STLC7550TQF7

0 to 70 TQFP48 Tube

STLC7550TQF7TR

0 to 70 TQFP48 Tape & Reel

E-STLC7550TQF7 (*) 0 to 70 TQFP48 Tube

www.st.com

Obsolete Product(s) - Obsolete Product(s)

Content STLC7550

2/24 Rev 9

Content

1 Pins description & Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1.1 Power Supply (5 pins) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1.2 Host interface (10 pins) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1.3 Clock signals (2 pins) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1.4 Analog interface (9 pins) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Transmit D/A section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.1 Transmit Low Pass Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.2 D/A Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Receive A/D section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.1 A/D Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.2 Receive Low Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 Clock generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.4 Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5 Host interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.6 Control register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.2 Nominal DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.3 Nominal AC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.4 Transmit Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.4.1 Performance of the Tx channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.4.2 Smoothing filter transfer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.5 Receive Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.5.1 Performance of the Rx channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5 Definition and Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Obsolete Product(s) - Obsolete Product(s)

STLC7550 Pins description & Block diagram

Rev 9 3/24

1 Pins description & Block diagram

Figure 1. Pin connection (top view)

Table 1. Pin list

Pin # Pin Name Type Description

1 - 2, 10 to 14,

22 to 26, 34 to

38, 46 to 48

NC - Not connected

3 SCLK O Shift Clock Output

4 FS I/O Frame Synchronization Input (slave)/Output (master)

5 DV

I Positive Digital Power Supply (2.7V TO 5.5V)

6 DGND I Digital Ground

7 MCM I Master Clock Mode

8 XTALOUT O Crystal Output

9 XTALIN/MCLK I Crystal Input (MCM = 1) / External Clock (MCM = 0)

15 HC1 I Hardware Control Input

16 HC0 I Hardware Control Input

17 PWRDWN

I Power down Input

18 M/S

I Master/Slave Mode Control Pin Input

19 V

REFP

O 16-bit D/A and A/D Positive Reference Voltage

20 V

REFN

O 16-bit D/A and A/D Negative Reference Voltage

1234567891011

25 26 27 28 29 30 31 32 33

34 35 36

AGND2

IN-

IN+

AUXIN+

AUXIN- XTALIN/MCLK

XTALOUT

MCM

DGND

SCLK

DOUT

DIN

TSTD1

RESET

OUT-

OUT+

AGND1

REFN

M/S

REFP

PWRDWN

HC0

HC1

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24

E-STLC7550TQF7

Mfr. #:

Buy E-STLC7550TQF7

Manufacturer:

STMicroelectronics

Description:

IC AFE 1 CHAN 16BIT 48TQFP

Lifecycle:

New from this manufacturer.

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E-STLC7550TQF7

E-STLC7550TQF7

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