Tone Detector
12
MX105A PRELIMINARY INFORMATION
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
V
DD
= 5.0 V @ T = 25°C
AMB
Load resistance on decoder output = 20kΩ.
Notes
Min.
Typ.
Max.
Units
Static Parameters
I
1.0
200
mA
kΩ
Ω
DD
Amplifier Input Impedance
Digital Output Impedance
Analog Output Impedance
Dynamic Parameters
Input Signal
160
500
1000
1200
1000
Ω
Frequency
40
20,000
Hz
Lowest Must Detect Level
Highest Will Not Detect Level
1
1
30
20
mV
RMS
RMS
mV
Highest Will Not Detect f /2
1, 2
30
dB
0
790
20
mV
RMS
RMS
Highest Will Not Detect 5(f )
1, 2
3
dB
0
250
mV
VCO
Frequency
120
2
120,000
10
Hz
Frequency Stability
100
ppm/°C
ppm/V
5000
BW Limiter
BW Range
%f
0
Amplifier
Open Loop Gain
GBWP
60
1.0
0
dB
MHz
dB
Closed Loop Gain
Detect Commutating Filter
Sensitivity (V
)
1
25
mV
RMS
TH
Operating Characteristics Notes:
1. Multiply by V /5V for other supply values.
DD
2. The reference level is V . The following formula converts dB to mV
.
RMS
TH
(dB/20)
mVRMS
=
× VTH
10
3. Observing pins 13, 14, or 15 (DW/J package) will cause a frequency shift due to additional loading. If tuning center
frequency by observing oscillator, design in a buffer amplifier between pin 15 and probe/calibration point and tune with
no input signal. Otherwise, tune by observing detect output band edges while sweeping input signal. VCO center
frequency is 6(f ) at pin 15 while it is 3(f ) at pins 13 and 14.
0
0
© 1997 MX•COM, INC.
www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc.# 20480133.003
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