參數(shù)資料
型號(hào)： MC13030DW
廠商： MOTOROLA INC
元件分類(lèi)： 接收器
英文描述： DUAL CONVERSION AM RECEIVER
中文描述： AM, AUDIO SINGLE CHIP RECEIVER, PDSO28
封裝： PLASTIC, SOIC-28
文件頁(yè)數(shù)： 6/16頁(yè)
文件大?。?/td> 386K
代理商： MC13030DW
MC13030
6
MOTOROLA ANALOG IC DEVICE DATA
PIN FUNCTION DESCRIPTION
Pin No.
Internal Equivalent Circuit
Description
1, 2
1
2
10 k
10 k
3.3 V
6.6 mA
150
150
Mixer1 Input
Pins 1 and 2 are equivalent. In the application circuit, 2 is grounded
with a capacitor and 1 is the input. If a load resistor is needed for the
input filter, it can be placed across Pins 1 and 2. Input impedance for
each pin is 10 k. IP3 (third order intercept) at the input is 20 dBm
(127 dB
μ
). To guarantee –50 dB IM3, the input level should not be
greater than 3.5 dBm (103 dB
μ
) (150 mVrms).
3
3
RF Ground
This should be connected to the ground used for the RF circuits.
4
4
5
10 k
5.1 V
4.0 V
3.4 k
FET RF AGC Output
This is the AGC for the cascode transistor connected to the RF amplifier
FET. The no–signal voltage is 5.1 V. The voltage decreases with
increasing input signals. A bypass capacitor and electrolytic capacitor
must be added to filter out RF signals on the transistor and audio signals
in the AGC signal. See Figures 4 and 5.
5
100
22 k
VCC
330
RF AGC2 Output
The voltage on this pin starts at 0 and increases with increasing input
signals. It is normally used to turn on diodes or a transistor connected
across the antenna input and is AGC delayed until Pin 6 reaches 2.7 V.
If the voltage on Pin 5 decreases below 2.0 V, the voltage on this pin will
decrease from 3.1 down to about 1.5 V. The maximum output current is
about 850
μ
A.
6
6
AGC
1.0 k
39 k
3.3 k
RF AGC Adjust
An electrolytic capacitor of 1.0
μ
F must be connected to prevent audio
modulation of the AGC circuits. If there is no resistor on this pin, the RF
AGC starts at an input level to Mixer1
≈
40 mVrms or Mixer2
≈
2.0 mVrms.
Connecting a resistor from Pin 6 to ground increases RF levels required
for AGC to start. It should be used to set the desired AGC level of Mixer2.
If a resistor is not connected to Pin 6, unwanted RF signals will cause the
AGC to start at a very low level, and desired signals may be suppressed.
7
7
500
1.5 k
Mixer1 RF Level Adjust
A resistor from Pin 7 to ground will increase the gain of an amplifier from
the input of Mixer1 to the AGC circuit. It can be used to set the RF AGC
level of Mixer1. The minimum value of R7 is about 680
.
8
8
510
3.3 k
SD
S
Station Detector Signal Level Adjust
A voltage on Pin 8 will set the desired signal strength at which the SD IF
Out on Pin 10 appears. The other input to this comparator is the S (signal
strength) signal. If Pin 8 is grounded, a square wave of the 2nd IF (usually
450 of 455 kHz) is present with very small input levels. This output could
also be used to drive an FM detector if desired.
9
9
IF Ground
Pin 9 is the ground for the IF section.
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