ST STB6100 User Manual

8PSK/QPSK direct conversion tuner IC

P

V

P

P

V

Features

■ Direct convers i on

■ Input range 950 to 2150 MHz

■ Low pass filter bandwidth 5 to 36 MHz

■ Fully integrated LO and PLL

■ Differential I/Q outputs

■ Buffered XO output to clock other devices

■ Low external component count

■ Low power consumption

■ 2-wire I

■ Low-cost integrated ZIF tuner for DVB-S2 and

DIRECTV
satellite applications

■ QPSK/8PSK/16APSK and 32APSK support

■ Simple interface to ST’s satellite demodulator

devices

■ Low phase noise, excellent linearity and high

LO harmonics rejection

■ VFQFPN2 5x5x1.0 32 pitch package

²

C serial interface

®

, VSAT and internet through

STB6100

Figure 1. Functional block diagram

GND

CP_BYP

2

26272829303

5

BB

Gain

1

1

6

5

CLK

VCCBB

GND

GND

GND

GND

CCMIX

VCCRF

GND

RFIN

Delta

o

SYN_BY

OP

AMP

Cancellation

Cancellation

TSTA

LD

DC Offset

DC Offset

LD

CP

CP

PDF/(Ni+Nf)

2-Wire BusBW

141312111

AS

DATA

VTUNE

1

0

/2 or /1

Divide

2/4

VREG3

VCCSCV

Sigma

o

0

90

AGC

VCO_BY

3
2

1

2

3

4

5

6

AGC

Control

7

8

9

CCBIAS

24

XTAL

23

XOOUT

22

XTALB

21

XO_BY

20

IOUT

IOUTB

19

18

QOUTB

QOUT

17

Table 1. Device summary

Order code Packing

April 2009 Doc ID 10839 Rev 2 1/5

STB6100 Standard tray version
STB6100T Tape and real

www.st.com

5

Description STB6100

1 Description

The STB6100 ASIC is a highly integrated, low-cost direct conversion (zero IF) tuner IC for
DVB-S2 broadcast satellite applications.

This device includes an LNA, down-converting mixers, baseband low-pass filters, gain
control, on-chip VCO and a low noise PLL. Its wide gain control range is well suited for low
symbol rate applications.

The STB6100 is controlled by a simple two-wire interface and has been designed to
minimize the external bill of materials to reduce manufacturing costs and to simplify the
board layout. The reduced component count ensures greater system reliability leading to
increase consumer satisfaction.

The DVB-S2 standard increases the capacity of satellite broadcasts by as much as 30%, so
enabling the effective deployment of high data rate applications such as high definition TV
and broadband internet. Packaged in VFQFPN2 5x5x1.0 32 pitch 0.50 package, it is ideal
for low cost DBS desi gn.

2/5 Doc ID 10839 Rev 2