TDA7427A Datasheet, PDF (15/21 Pages) STMicroelectronics – AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

TDA7427A
LOCK DETECTOR & PLL MODE CONTROL
MSB
D7
D6
D5
D4
D3
D2
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
1
0
1
LDENA INLOCK D3
D2
D1
D0
D1
0
0
1
1
PM1
LSB
D0
0
1
0
1
PM0
FUNCTION
PLL standby mode
PLL AM swallow mode
PLL AM direct mode
PLL FM mode
PD phase difference threshold 10ns
PD phase difference threshold 20ns
PD phase difference threshold 30ns
PD phase difference threshold 40ns
Not used in application mode
Activation delay = 4 ⋅ fref
Activation delay = 6 ⋅ fref
Activation delay = 8 ⋅ fref
Digital output 1 at pin ”dout1/inlock”
Inlock information at pin ”dout1/inlock”
No lock detector controlled chargepump
Lock detector controlled chargepump
Bit name
Subaddress = 05H
IF COUNTER REFERENCE CONTROL 1 (LSB)
MSB
D7
D6
D5
D4
D3
D2
D1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
LSB
D0
0
1
0
LSB = 0
LSB = 1
LSB = 2
1
1
1
1
IRC7
1
1
1
1
IRC6
1
1
1
1
IRC5
1
1
1
1
IRC4
1
1
1
1
IRC3
1
1
1
1
IRC2
0
0
1
1
IRC1
0
1
0
1
IRC0
LSB = 252
LSB = 253
LSB = 254
LSB = 255
Bit name
FUNCTION
Subaddress = 06H
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