TDA8261TW Datasheet, PDF (4/22 Pages) NXP Semiconductors – Satellite Zero-IF QPSK/8PSK downconverter with PLL synthesizer

Philips Semiconductors
Satellite Zero-IF QPSK/8PSK
downconverter with PLL synthesizer
BLOCK DIAGRAM
Product specification
TDA8261TW
handbook, full pagewidth
RFGND2 BIASN1
BIASN2
BBGND1
IOUT
QBBIN
VCC(BB)
QOUT
IBBIN BBGND2
11
6
18
13
15
21 12 14 19
20
9
RFA
10
RFB
7
RFGND1
8
VCC(RF)
22
VCOGND
VCC(VCO)
25
24
TKA
23
TKB
1
XT1
2
XT2
4
PLLGND
3
VCC(PLL)
31
SDA
30
SCL
29
AS
26
BVS
17
IBBOUT
16
QBBOUT
AGC
CONTROL
5
AGCIN
VCO
FAST PHASE/
FREQUENCY
COMPARATOR
QI
integrated
oscillator
DIVIDE-BY-4
TDA8261TW
OSCILLATOR
15-BIT DIVIDER
f _XTAL
REFERENCE
DIVIDER
f _DIV
DIGITAL PHASE
COMPARATOR
f _COMP
28
CP
CHARGE PUMP
33 V
AMP
27
VT
32
XTOUT
I²C - BUS
CONTROL LOGIC
AND LATCH
POWER - ON
RESET
MBL859
2004 Dec 02
Fig.1 Block diagram.
4