TDA6650ATT Datasheet, PDF (9/54 Pages) NXP Semiconductors – 5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog)

NXP Semiconductors
TDA6650ATT; TDA6651ATT
5 V mixer/oscillator and low noise PLL synthesizer
START
ADDRESS
BYTE
DIVIDER
BYTE 1
DIVIDER
BYTE 2
CONTROL CONTROL CONTROL CONTROL
BYTE 1 BYTE 2 BYTE 1 BYTE 2
STOP
I²C-bus transmission dedicated to
the MOPLL
Fig 4. Example of I²C-bus transmission frame
50 µs
START
ADDRESS
BYTE
I²C-bus transmission
dedicated to
another IC
fce921
Table 6. I²C-bus write data format
Name
Byte Bit
Ack
MSB^[1]
LSB
Address byte
1
1
1
0
0
0
MA1 MA0 R/W = 0 A
Divider byte 1 (DB1) 2
0
N14
N13
N12
N11
N10
N9
N8
A
Divider byte 2 (DB2) 3
N7
N6
N5
N4
N3
N2
N1
N0
A
Control byte 1 (CB1); 4
1
T/A = 1 T2
T1
T0
R2
R1
R0
A
see Table 7
1
T/A = 0 0
0
ATC
AL2
AL1
AL0
A
Control byte 2 (CB2) 5
CP2
CP1
CP0
BS5
BS4
BS3
BS2
BS1
A
[1] MSB is transmitted first.
Table 7. Description of write data format bits
Bit
Description
A
acknowledge
MA1 and MA0
programmable address bits; see Table 8
R/W
logic 0 for write mode
N14 to N0
programmable LO frequency;
N = N14 × 2¹⁴ + N13 × 2¹³ + N12 × 2¹² + ... + N1 × 2¹ + N0
T/A
test/AGC bit
T/A = 0: the next 6 bits sent are AGC settings
T/A = 1: the next 6 bits sent are test and reference divider ratio settings
T2, T1 and T0
test bits; see Table 9
R2, R1, and R0
reference divider ratio and programmable frequency step; see Table 10
ATC
AGC current setting and time constant; capacitor on pin AGC = 150 nF
ATC = 0: AGC current = 220 nA; AGC time constant = 2 s
ATC = 1: AGC current = 9 µA; AGC time constant = 50 ms
AL2, AL1 and AL0 AGC take-over point bits; see Table 11
CP2, CP1 and CP0 charge pump current; see Table 12
BS5, BS4, BS3, BS2 PMOS ports control bits
and BS1
BSn = 0: corresponding port is off, high-impedance state (status at
power-on reset)
BSn = 1: corresponding port is on; V_O = V_CC − V_DS(sat)
TDA6650ATT_6651ATT_2
Product data sheet
Rev. 02 — 2 February 2007
© NXP B.V. 2007. All rights reserved.
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