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Número de pieza | TDA8261TW | |
Descripción | Satellite Zero-IF QPSK/8PSK downconverter with PLL synthesizer | |
Fabricantes | NXP Semiconductors | |
Logotipo | ||
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DATA SHEET
TDA8261TW
Satellite Zero-IF QPSK/8PSK
downconverter with PLL
synthesizer
Product specification
Supersedes data of 2004 Oct 25
2004 Dec 02
1 page Philips Semiconductors
Satellite Zero-IF QPSK/8PSK
downconverter with PLL synthesizer
Product specification
TDA8261TW
PINNING
SYMBOL
XT1
XT2
VCC(PLL)
PLLGND
AGCIN
BIASN1
RFGND1
VCC(RF)
RFA
RFB
RFGND2
QOUT
BBGND1
QBBIN
VCC(BB)
QBBOUT
IBBOUT
BIASN2
IBBIN
BBGND2
IOUT
VCOGND
TKB
TKA
VCC(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
5 Page Philips Semiconductors
Satellite Zero-IF QPSK/8PSK
downconverter with PLL synthesizer
Product specification
TDA8261TW
CHARACTERISTICS
Tamb = 25 °C; VCC = 5 V; unless otherwise specified; RL = 1 kΩ on base band output IBBOUT and QBBOUT;
Vo(p-p) = 750 mV on IBBOUT and QBBOUT.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Supply
VCC
ICC
VPOR
supply voltage
supply current
voltage limit where POR active
4.75
−
−
Performances from pins RFA or RFB to pins IBBOUT or QBBOUT
LOleak
LO leakage through pins RFA
and RFB
−
∆Gv
Gv(max)
dynamic voltage gain range
maximum voltage gain
VAGC = 0 to 3 V
VAGC = 3 V;
see Figs 4 and 5
48
55
Vo(p-p)
IP2i
IP3i
F
Zo
output voltage (peak-to-peak)
2nd-order interception point
3rd-order interception point
noise figure
output impedance on pin IOUT
and QOUT
recommended value
at RF input; VAGC = 0 V
at RF input; VAGC = 0 V
at maximum gain;
VAGC = 3 V; see Fig.6
−
−
−
−
−
Zi input impedance on pin IBBIN
and QBBIN
−
Gv(I-Q)
voltage gain mismatch between
I and Q
in 22.5 MHz band with
bypass capacity 100 nF
between IOUT and IBBIN,
QOUT and QBBIN
−
∆Φ
absolute quadrature error
VAGC = 1.5 V;
Vo = 750 mV (peak to
peak value); measured in
baseband
−
5.00
130
2.7
−75
50
57
750
19
14
18
35
1.0
−
0
5.25
−
−
−
−
−
−
−
−
−
−
−
1
3
V
mA
V
dBm
dB
dB
mV
dBm
dBm
dB
Ω
kΩ
dB
deg
Pulling sensitivity
3/4LO
sensitivity to pulling on the third see Table 9 and Fig.8
harmonic of the external VCO
5/4LO
sensitivity to pulling on the fifth see Table 9 and Fig.8
harmonic of the external VCO
−
−
−40 −35 dBc
−40 −35 dBc
VCO and synthesizer
fosc
ϕn(osc)
oscillator frequency
oscillator phase noise in the
satellite band
ϕn phase noise on baseband
outputs
MDR
main divider ratio
foffset = 100 kHz; out of
PLL loop bandwidth
foffset = 1 and 10 kHz;
fCOMP = 1 MHz; see Fig.7
950
−
−
64
−
−100
−
−
2 175
−94
MHz
dBc/Hz
−78 dBc/Hz
32 767
2004 Dec 02
11
11 Page |
Páginas | Total 22 Páginas | |
PDF Descargar | [ Datasheet TDA8261TW.PDF ] |
Número de pieza | Descripción | Fabricantes |
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