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TDA7427D Datasheet(PDF) 7 Page - STMicroelectronics

Part # TDA7427D
Description  AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
PDF  21 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7427D Datasheet(HTML) 7 Page - STMicroelectronics

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REGISTER NAME
FUNCTION
PC
Programmable counter for VCO frequency
RC
Reference counter PLL
IRC
Reference counter IF
IFCM
IF counter mode selector
EW
Frequency error window IF counter
IFENA
Enable IFRC
CF
Center frequency IF counter
IFS
Sampling time IF counter
PM
Stby, FM, AM, AM swallow mode selector
D
Programmable delay and phase error for lock detector
LPIN1/2
Loop filter input select
PLLSTOP
PLL stop
A
Charge pump high current
B
Charge pump low current
LDENA
Lock detector enable
CURRH
Set current high
OSC
Oscillator adjust
DOUT1
Push pull output 5V
DOUT3
Open collector output
INLOCK
Lock detector output
Table 2. Control Register Functions.
OSC IN
REGISTER
R0 ...R15
PREDIVIDER
:R
PD
AM IN
FM IN
REGISTER
PC0 ...PC4
COUNTER
A
PRESCALER
M/M+1
REGISTER
PC5 ... P15
COUNTER
:B
fref
fsyn
D95AU375A
∆ϕ
TO CHARGE
PUMP
Figure 1. FM and AM (SW) operation (swallow mode)
TDA7427
7/21



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