SA2111CA SILAN [Silan Microelectronics Joint-stock], SA2111CA Datasheet - Page 4

• Manufacturer Part Number: SA2111CA
• Description: 3V AM/FM +MPX TUNER IC(FOR MECHANICAL TUNING)
• Manufacturer: SILAN [Silan Microelectronics Joint-stock]

(Continued)
FUNCTION DESCRIPTION
Application note:
1.
below:
and GND line.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
When pin3 is open, no AF signal can pass through the AMP stage because of the common mode.
When the value of C3 that connected to pin3 is over 1uF, all AF signal can pass through the AMP stage.
The cut-off frequency fL is determined by the internal resistance 22k
It is possible to reduce the recovered output level at AM mode, by additional resistance between the pin (3)
Pin No.
AM low-cut circuit
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
8
9
FM IF IN
GND
TUN LED
ST LED
QUAD
R-OUT
L-OUT
LPF1
LPF2
MPX IN
DET OUT
AFC
AM OSC
FM OSC
RF V
FM RF OUT
AM RF IN
CC
Symbol
FM IF INPUT
GND for AM, FM IF, FM MPX stage
tuning LED
Stereo LED
FM QUAD. Detector
R-channel Output
L-channel Output
V16=VCC AM
V16=OPEN FM
MPX INPUT
FM & AM DETECT OUTPUT
AUTO FREQUENCY CONTROL
AM OSC
FM OSC
VCC for FM OSC stage
FM RF OUTPUT
AM RF INPUT
VCO stop terminal V15=VCC VCO STOP
LPF terminal for synchronous detector
LPF terminal for phase detector
Bias terminal for AM/FM SW circuit
f
L
2
x
x
22
1
x
10
3
x
C3
(Hz)
Description
(Typ.) and the external capacitor C3 as
Rev: 1.1
SA2111C
Page 4 of 10
2005.10.26