TDA8261TW Datasheet, PDF (5/22 Pages) NXP Semiconductors – Satellite Zero-IF QPSK/8PSK downconverter with PLL synthesizer

Philips Semiconductors
Satellite Zero-IF QPSK/8PSK
downconverter with PLL synthesizer
Product specification
TDA8261TW
PINNING
SYMBOL
XT1
XT2
V_CC(PLL)
PLLGND
AGCIN
BIASN1
RFGND1
V_CC(RF)
RFA
RFB
RFGND2
QOUT
BBGND1
QBBIN
V_CC(BB)
QBBOUT
IBBOUT
BIASN2
IBBIN
BBGND2
IOUT
VCOGND
TKB
TKA
V_CC(VCO)
BVS
VT
CP
AS
SCL
SDA
XTOUT
PIN
DESCRIPTION
1 4 MHz crystal oscillator input 1
2 4 MHz crystal oscillator input 2
3 supply voltage for PLL circuit (5 V)
4 ground for PLL circuit
5 AGC input from satellite
demodulator and decoder
6 RF isolation input 1 (5 V)
7 ground 1 for RF circuit
8 supply voltage for RF stage (5 V)
9 RF signal input A
10 RF signal input B
11 ground 2 for RF circuit
12 quadrature output for external
filtering
13 ground 1 for baseband stage
14 quadrature baseband input after
external filtering
15 supply voltage for baseband stage
(5 V)
16 quadrature baseband output to
satellite demodulator and decoder
17 in-phase baseband output to
satellite demodulator and decoder
18 RF isolation input 2 (5 V)
19 in-phase baseband input after
external filtering
20 ground 2 for baseband stage
21 in-phase output for external filtering
22 ground for VCO circuit
23 VCO tank circuit input B
24 VCO tank circuit input A
25 supply voltage for VCO circuit (5 V)
26 bus voltage select input
27 tuning voltage output for VCO
28 charge pump output
29 address selection input
30 I²C-bus clock input
31 I²C-bus data input and output
32 4 MHz crystal oscillator output to
satellite demodulator and decoder
handbook, halfpage
XT1 1
32 XTOUT
XT2 2
31 SDA
VCC(PLL) 3
PLLGND 4
30 SCL
29 AS
AGCIN 5
28 CP
BIASN1 6
27 VT
RFGND1 7
26 BVS
VCC(RF) 8
25 VCC(VCO)
TDA8261TW
RFA 9
24 TKA
RFB 10
23 TKB
RFGND2 11
22 VCOGND
QOUT 12
21 IOUT
BBGND1 13
20 BBGND2
QBBIN 14
19 IBBIN
VCC(BB) 15
QBBOUT 16
18 BIASN2
17 IBBOUT
MBL855
Fig.2 Pin configuration.
2004 Dec 02
5