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PDF ISG4042-T Data sheet ( Hoja de datos )
| Número de pieza | ISG4042-T | |
| Descripción | 5V CATV MODEM RF TUNER AND TRANSMITTER | |
| Fabricantes | Sirenza Microdevices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISG4042-T (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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ISG4042-T
5 V CATV MODEM RF TUNER AND
TRANSMITTER
FEATURES
TWO WAY DOCSIS BASED DESIGN:
91-857 MHz Downstream
5-42 MHz Upstream
SINGLE SUPPLY 5 V OPERATION:
With Built in Linear Regulation
SINGLE AGC CONTROL
Simplifies Modem Calibration
ULTRA SMALL SIZE:
1.9 x 2.0 x 0.5 in., 1.9 in3
46.2 x 49.0 x 12.5 mm., 28.5 cc.
DIGITAL LINEAR RF TRANSMITTER:
All Harmonics meets DOCSIS @ 58 dBmV (see note 2)
> 56 dB Gain Range (0.5 dB steps)
INTERFACES DIRECTLY WITH QAM MOD/DEMOD IC's:
(see note 3)
DESCRIPTION AND APPLICATIONS
The ISG4042-T is an RF tuner/transmitter designed for use in
DOCSIS cable modem applications. It is a complete solution
that interfaces directly with QAM Mod/Demod IC's. The tuner/
transmitter integrates a diplex filter, dual conversion receiver,
transmit AGC amplifier, and other RF filtering (see Figure 1).
The diplex filter provides over 40 dB of isolation between the
TX band and the RX band. The receiver channel selects and
converts QAM signals in the RX band down to the IF sampling
frequency. It also provides the necessary gain control to adjust
the input power to the DSP chip. The RF transmitter section
provides > 56 dB of digitally controlled range while maintaining
excellent linearity performance.
ELECTRICAL CHARACTERISTICS (VCC = 5 V, ±2 %, TA = 25°C) (see note 4)
SYMBOLS
PARAMETERS
UNITS
MIN
TYP
MAX
RF Performance (RX)
www.DataSheet4U.com
fOP
VAGC
NFMAX
RLIN
Operating Frequency Range (Center to Center)
Input Signal Level
Maximum Voltage Gain
Automatic Voltage Gain Control Range
IF Automatic Voltage Gain Control
Noise Figure (at Max Voltage Gain)
Phase Noise at 10 kHz Offset
LO Radiation at RF Input
Resolution
Lock Time (end to end channel)
Input Impedance (Nominal)
Input Return Loss
Channel Bandwidth USA
Output Frequency
Passband Ripple over 5.36 MHz Bandwidth
Image Rejection
Inband Group Delay
CSO1
CTB1
Output Frequency Offset
Output IF Voltage Level
Output IF Load
MHz
dBmV
dB
dB
V
dB
dBc/Hz
dBm
kHz
msec.
ohms
dB
MHz
MHz
dB
dB
ns
dBc
dBc
kHz
VPP
KΩ
91
-15
45
0
6
50
45
45
-35
57
8
-85
-40
31.25
18
75
6
43.75
1
50
50
1
1
857
15
3.3
10
-82
2
100
+35
Notes:
1. 110 Channels at +15 dBmV/tone.
2. 160K Symbol rate; under DOCSIS PHY - 17 high condition.
3. Application specification for TI 4040/4042.
4. Specifications apply to test conditions listed.
* PHY 7/17/18 Data available upon request.
Performance tests and ratings for Sirenza Microdevices products were performed internally by Sirenza and measured using specific computer systems and/or components and reflect the approximate
performance of the products as measured by those tests. Any difference in circuit implementation, test software, or test equipment may affect actual performance. The information provided herein is
believed to be reliable at press time and Sirenza Microdevices assumes no responsibility for the use of this information. All such use shall be entirely at the users own risk. Prices and specifications for
Sirenza Microdevices products are subject to change without notice. Buyers should consult Sirenza Microdevices standard terms and conditions of sale for Sirenzas limited warranty with regard to its
products. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. Sirenza Microdevices does not authorize or warrant any product for use in life-
support devices and/or systems.
303 S. Technology Court, Broomfield, CO 80021
303-327-3030
www.sirenza.com
1
REV. F
4/1/2005
1 page  
TYPICAL PERFORMANCE CURVES
PASSBAND AMPLITUDE RIPPLE
RES BW 300 KHz
VBW 100 KHz
SWP 20.0 msec
43.75 MHz
SPAN 10.00 MHz
PHASE NOISE (Narrowband)
REF = -15.00 dBm
RES BW 1.0 KHz
VBW 1 KHz
SWP 275 msec
PNOISE @ 10 KHz
= 85 dBc/Hz
MKR ∆ = -54.71 dB
ISG4042-T
AGC RANGE
70
60
50
40
30
20
10
0
0 0.5 1 1.5 2 2.5 3
Volts (V)
PHASE NOISE (Broadband)
REF = -22.00 dBm
RES BW 1.0 KHz
VBW 1 KHz
SWP 625 msec
PNOISE @ 100 KHz
= 109 dBc/Hz
MKR ∆ = -79.31 dB
43.75 MHz
SPAN 25 KHz
TX DIPLEXER RESPONSE
40
30
20
10
0
-10
-20
-30
-40
-50
5 15 25 35 45 55 65 75 85 95 105 115 125
Frequency
43.75 MHz
SPAN 250 KHz
CONVERSION vs. FREQUENCY
60
59
58
57 25º C
56
55
70º C
54
53
52
51
50
80 180 280 380 480 580 680 780 880
Frequency (MHz)
303 S. Technology Court, Broomfield, CO 80021
303-327-3030
5
www.sirenza.com
REV. F
4/1/2005
5 Page | ||
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| PDF Descargar | [ Datasheet ISG4042-T.PDF ] | |
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