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PDF FX118 Data sheet ( Hoja de datos )
| Número de pieza | FX118 | |
| Descripción | Duplex Frequency Inverter | |
| Fabricantes | Consumer Microcircuits Limited | |
| Logotipo |  |
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CML Semiconductor Products
PRODUCT INFORMATION
FX118 Duplex Frequency Inverter
for Cordless Telephones
Publication D/118/3 July 1994
Features/Applications
Frequency Inversion Scrambling
Full-Duplex Operation
High Baseband and Carrier
www.DataSheet4UR.ceomjection
Audio Lowpass and Bandpass
Filtering On-Chip
Xtal Oscillator Stabilty
Low Power Requirement
(3.0 Volt Minimum)
Cordless Telephones
Base and Handheld Applications
Input Gain Adjustment
Plastic DIL and S.O.I.C. Package
Styles
C1 AMP OUT
C1 IN
INPUT AMP
V BIAS
XTAL/CLOCK
XTAL
V BIAS
INPUT AMP
C2 IN
C2 AMP OUT
LPF(1) OUT
LPF(1)
B MOD(1) IN
BAL MOD (1)
+0.5dB
CHANNEL 1 (C1)
-4.0dB
CLOCKS
and
LOGIC
FILTER CLOCKS
111kHz
CARRIER
3.3kHz
CHANNEL 2 (C2)
-4.0dB
+0.5dB
LPF(2)
LPF(2) OUT
BAL MOD (2)
B MOD(2) IN
Fig.1 FX118 Duplex Frequency Inverter
BPF(1)
+4.0dB
+4.0dB
BPF(2)
C1 OUT
VDD
V BIAS
V SS
C2 OUT
FX118
Brief Description
The FX118 is a low-power, full-duplex frequency
inverter available to provide voice privacy for cordless
telephone systems by mixing the incoming audio with an
internally produced carrier frequency (3.3kHz).
This chip contains two completely separate audio
channels (C1 and C2) each comprising a “component-
adjustable” input amplifier, a 10th-order lowpass filter, a
balanced modulator and a 14th-order bandpass filter
output.
The on-chip modulation process has the properties of
high baseband and carrier frequency rejection which
when combined with high-order output filtering,
produces a high-quality recovered voiceband audio.
The frequency stability of the FX118 is achieved by an
on-chip oscillator employing an external 4.433619MHz
Xtal or clock input to produce the common carrier
frequency and the sampling clocks for the switched
capacitor low and bandpass filters.
This microcircuit has a low power requirement of 3.0
volts (min.) and is encapsulated in either 16-pin DIL or
small outline SMD (S.O.I.C.) plastic packages both of
which are of a physical size suitable for either base or
handset type telephone instruments as well as battery-
portable and mobile communications systems.
1
1 page  
Specification
Absolute Maximum Ratings
Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is not
implied.
Supply voltage
Input voltage at any pin (ref V = 0V)
SS
Sink/source current (supply pins)
(other pins)
Total
device
dissipation
@
T
AMB
25°C
Derating
-0.3 to 7.0V
-0.3 to (V + 0.3V)
DD
+/- 30mA
+/- 20mA
800mW Max.
10mW/°C
Operating temperature range:
FX118DW/P
-40°C to +85°C
Storage temperature range:
FX118DW/P
-40°C to +85°C
Operating Limits
www.DataSheetA4Ull .dceomvice characteristics are measured under the following conditions unless otherwise specified:
VDD = 3.75V. TAMB = 25°C. Xtal/Clock f0 = 4.433619MHz. Audio level 0dB ref: = 388mV rms @ 1.0kHz.
Characteristics
See Note
Min.
Typ.
Max.
Unit
Static Values
Supply Voltage
Supply Current
Input Impedance
(Amplifiers)
Output Impedance (LP Filters)
Output Impedance (C1, C2 )
Output Impedance (C1, C2 Amps)
On-Chip Xtal Oscillator
RIN
R
OUT
Inverter Gain
Gain/Bandwidth Product
Dynamic Values
Analogue Signal Input Levels
SINAD
6
Unwanted Modulation Products
1, 2
Carrier Breakthrough
1, 2
Baseband Breakthrough
1, 2
Carrier Frequency
Analogue Output Noise
3
Analogue Output Noise
5
Filters
Input Lowpass Filter
1
Cut-Off Frequency (-3dB)
Passband Ripple (300Hz - 3kHz)
Attenuation at 3.3kHz
Attenuation at 3.6kHz
Passband Gain
Output Bandpass Filter
1, 4
Passband Frequencies
Passband Ripple
Low Freq. Roll-Off <200Hz
High Freq. – Attenuation at 3.4kHz
Passband Gain
Overall Modulated and De-Modulated Channel Response
Passband Frequencies (Tx and Rx Channel)
Passband Ripple
Low Freq. Roll-Off <250Hz
High Freq. – Attenuation at 3.4kHz
Passband Gain
4
Distortion
1
3.0
–
1.0
–
–
–
10.0
–
–
–
-16.0
–
–
–
–
–
–
–
–
–
–
–
–
300
–
12.0
–
3.5
300
-3.0
18.0
–
–
–
3.75
4.0
10.0
2.0
200
10.0
–
10.0
10.0
10.0
–
30.0
-40.0
-55.0
-40.0
3299
-42.0
-46.0
3100
±1.0
30.0
45.0
0.5
–
±1.0
–
48.0
4.5
–
–
–
48.0
0.5
3.0
5.5
6.0
–
–
–
–
–
–
–
–
4.0
–
–
–
–
–
–
–
–
–
–
–
–
3000
–
–
–
5.5
3000
2.0
–
–
–
–
V
mA
MΩ
kΩ
Ω
kΩ
MΩ
kΩ
V/V
MHz
dB
dB
dB
dB
dB
Hz
dB
dBp
Hz
dB
dB
dB
dB
Hz
dB
dB/oct.
dB
dB
Hz
dB
dB/oct.
dB
dB
%
Notes:
1. Measured with an audio input level of -3.0dB.
2. With respect to a single modulated (scrambling) channel.
3. Measured with a short circuit input, at any analogue output, in a 30.0kHz bandwidth.
4. With Input Amplifier gain at 0dB.
5. Measured psophometrically weighted, at any analogue output.
6. Measured in a 30kHz bandwidth.
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet FX118.PDF ] | |
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