mc13145fta Lansdale Semiconductor, Inc., mc13145fta Datasheet - Page 6

• Manufacturer Part Number: mc13145fta
• Description: Uhf Wideband Receiver Subsystem Lna, Mixer, Vco, Prescaler, If Subsystem, Coiless Detector
• Manufacturer: Lansdale Semiconductor, Inc.

ML13145
Page 6 of 17
1, 48
Pin
47
2
3
4
5
6
IF
V ref1
Detector
Phase
Symbol/Type
Det Gain
AFT Out
Det Out
BWadj
48, 1
BWadj
AFT In
V EE
V EE
F adj
2Ib
Rb
47
V ref2
See Figure 3.
Fadj
2I
Figure 3. Coilless Detector Internal Circuit
i
Rf
2
ICO
PIN FUNCTION DESCRIPTION
Description
Rt
www.lansdale.com
i
C t
AFT Out
AFT In
4
3
V CC
A * i
Current Amplifier
COILLESS DETECTOR
Bandwidth Adjust
The deviation bandwidth of the detector response is
determined by the combination of an on–chip
capacitor and an external resistor to ground.
Frequency Adjust
The free running frequency of the detector
oscillator is defined by the combination of an
on–chip capacitor and an external resistor, Radj
from frequency adjust pin to ground.
V EE , Negative Supply
These pins are V EE supply for the coilless detector
circuit.
AFT Out
The AFT is low pass filtered with a corner frequency
below the audio bandwidth allowing the error to be
added to the center frequency adjust signal at Fadj,
Pin 2. The low frequency high pass corner is set by
the external capacitor, Ct from AFT out (Pin 3) to
AFT in (Pin 4) and external resistor, Rt from AFT
out to Fadj (Pin 2).
AFT In
The AFT in is used to set the buffer transfer
function.
Detector Gain
The AFT buffer is used to set the buffer transfer
function.
Detector Output
Set gain and output level of detector with resistor to
Det Out Pin.
Description
LANSDALE Semiconductor, Inc.
A * i
V CC
5
6
Det Out
RI
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