Mitel MP1S High performance broadband downconverter Datasheet

SL2035
High Performance Broadband Downconverter
Preliminary Information
DS5117 Issue 2.1 October 1999
Features
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Ordering Information
Single Chip Broadband Solution
Wide Dynamic Range RF Input
Low Phase Noise Balanced Internal Local Oscillator
High Frequency Range: 1 to 1·3 GHz
ESD Protection 2kV min., MIL-STD-883B Method 3015
Cat.1 (Normal ESD handling procedures should be
observed)
Applications
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Double Conversion Tuners
Digital Terrestrial Tuners
Data Transmit Systems
Data Communications Systems
The SL2035 is a bipolar, broadband wide dynamic range
mixer oscillator, optimised for applications as the
downconverter in double conversion tuner systems. It also
has application in any system where a wide dynamic range
broadband frequency converter is required.
SL2035/IG/MP1S (Tubes)
SL2035/IG/MP1T (Tape and Reel)
The output of the preamplifier is fed to the mixer section
which is optimised for low radiation application. In this stage
the RF signal is mixed with the local oscillator frequency,
which is generated by an on-chip oscillator. The oscillator
block uses an external tuneable network and is optimised
for low phase noise. A typical application is shown in
Figure 5. This block also contains a buffer-amplifier to
interface with an external PLL to allow for frequency
synthesis of the local oscillator.
The IF output can be loaded either differentially or singleended. It is recommended that the differential load as in
Figure 5 is applied as this gives best noise performance. If
the output is loaded single-ended the noise figure will be
degraded. The approximate model of the IF output is shown
in Figure 4.
The SL2035 is a single chip containing all necessary active
circuitry and simply requires an external tuneable resonant
network for the local oscillator. The block diagram is shown
in Figure 1 and pin connections are shown in Figure 2.
In application care should be taken to achieve symmetric
balance to the IF outputs to maximise intermodulation
performance.
In normal application the signal from the high IF output is
connected to the RFIN and RFIN inputs. The RF input
preamplifier of the device is designed for low noise figure
within the operating region and for high intermodulation
distortion intercept so offering good signal to noise plus
composite distortion spurious performance.
Absolute Maximum Ratings
The preamplifier also provides gain to the mixer section
and back isolation from the local oscillator section. The
approximate model of the RF input is shown in Figure 3.
Supply voltage, VCC
RF differential input voltage
All I/O port DC offset
Storage temperature
Junction temperature
Package thermal resistance
Chip to ambient, θJA
Chip to case, θJC
RFIN
IF1
RFIN
IF2
LO2
PRSC1
LO1
Figure 1 SL2035 block diagram
20·3V to 17V
2·5V
20·3 to VCC 10·3V
255°C to 1150°C
1150°C
20°C/W
80°C/W
SL2035
IF2
1
16
IF1
NC
GND
2
15
3
14
NC
VCC/VCO
GND
GND
4
GND
RFIN
RFIN
12
LO2
LO1
6
11
VCC/VCO
7
10
8
9
PRSC1
VCC/LNA
5
SL
2035
13
MP16
Figure 2 Pin connections - top view
Quick Reference Data
All data applies with circuit component values given in Table 1
Characteristic
RF input operating frequency range
Input noise Figure, SSB
Conversion gain
IIP3 input referred
P1dB input referred
LO phase noise at 10 kHz offset, fRF 1 to 1·3GHz, application as in Figure 5
Value
Units
1000-1300
12
11
118
106
,290
MHz
dB
dB
dBµV
dBc
dBc/Hz
Electrical Characteristics
Tamb = 240°C to 185°C, VCC = 5V 65%, VEE = 0V. These characteristics are guaranteed by either production test or
design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated.
Value
Characteristic
Supply current
Input frequency range
Composite peak input signal
Input impedance
Input return loss
Input noise figure
Conversion gain
Pin
Min.
Typ.
9,11,14
7,8
7,8
7,8
7,8
1000
97
27
9
10
8
11
Gain variation within channel
Through gain
116
IIP3
LO operating range
12,13 0·9
295
LO phase noise, 10kHz offset
LO phase noise floor
30
IF output frequency range
1,16
118
290
Max.
Conditions
Units
99
mA
1300
MHz
dBµV
IF output pins 1 and 16 will be nominally
connected to VCC through the differential
balun load as in Figure 5
Operating condition only
See Figure 3
dB
See Note 1
221
dB
TAMB = 27°C, with input matching network
13
as in Figure 5.
dB
With differential load
12
Differential voltage gain to 50Ω load on
14
output of impedance transformer as in
Figure 5
dB
Channel bandwidth 8MHz within operating
0·5
frequency range
dB
995-1305MHz
220
125 dBµV See Note 1
GHz
Application as Figure 5. See Note 2
1·4
288 dBc/Hz Application as Figure 5
TBA dBc/Hz Application as Figure 5
MHz
Compatible with all standard IF frequencies,
60
determined by application
NOTES
1. Any two tones within RF operating range at 92dBµV with output load as in Figure 5.
2. Use low side LO injection.
2
cont…
SL2035
Electrical Characteristics (continued)
Value
Characteristic
Pin
LO and harmonic leakage
to RF input
Fundamental
2nd harmonic
LO Prescaler output swing
LO Prescaler output impedance
IF output impedance
7,8
7,8
10
10
1,16
Min.
Typ.
Max.
72
92
95
25
75
Units
dBµV
dBµV
dBµV
Ω
Ω
Conditions
To device input
To device input
Into 50Ω load
See Figure 4
6
PIN 1
PIN 7
3·3p
6
2p
820
PIN 8
Figure 3 Approximate model of RF input
325
PIN 16
Figure 4 Approximate model of IF output
Application Notes
Figure 5 shows the SL2035 in a typical downconverter
application.
This matches the device output impedance of nominally
400Ω (balanced) to 50Ω (unbalanced).
The network connected to RF input pin 7 and pin 8 is to
improve the matching between the device input and the
source. The source would normally be from the 1·1MHz
IF output of the upconverter (SL2030) via passive BPF
and gain stage all designed for 50Ω characteristic
impedance.
The network connected to the LO pin 12 and pin 13 is a
varactor diode loaded resonant microstrip line resonator.
Fine adjustment of the tuning range can be achieved by
physically moving C19 (see Figure 5) closer to the LO pins.
This extends the bottom end of the tuning range.
The network connected to the IF output pin 1 and pin 16 is
a narrow band tuned balun centred typically on 40MHz.
It is important to provide good decoupling on the 5V
supplies and to use a layout which provides some isolation
between the RF, IF and LO ports.
3
SL2035
IF OUT
SKT3
C52
C4
L6
VCC2
VCC3
C5
L11
L10
C15
GND
GND
GND
SKT1
GND
C1
RFIN
RFIN
RFIN
L5
L3
C54
C11
C14
L8
IF2
C53
VCC3
C6
J2
POWER
1 5V DEVICE SUPPLY
2 GND
L7
VCC1
VCC2
1
16
2
15
3
14
4
SL
2035
5
C17
7
10
8
9
C23
VCC/VCO
R10
C19
LO1
12
11
C9
LO2
13
6
C2
IF1
S1 RESONATOR
SKT4 EXTERNAL
VARACTOR DRIVE
(REMOVE R9)
VCC/VCO
C10
PRSC1
C13
VCC/LNA
D1
VCC1
C3
C18
C37 NC
C8
C21
R9
R12
C22
SKT2
130V
C4
NOTE: Refer to Table 1 for component values
L9
C42
R8
C31
R7
CP
X1 C30
XTAL
REF/COMP
15V
ADDRESS
SDA
J3
SCL5
3
SCL
5V
4
P3
5
P2
SDA5
1
16
2
15
3
14
4
5
6
SP
5659
13
12
11
7
10
8
9
DRIVE
T1
BCW31
VEE
RF I/P
RF I/P
30V
C24
5V
ADC C43
C46
P0
R11
6
I2C BUS
C47
C38
Figure 5 SL2035 upconverter application
4
C34
2
GND
3
5V SYNTHESISER
15V
VCC
P1
J1
POWER
1 30V SYNTHESISER
C41
SL2035
Component
Value/type
Component
Value/type
C1
C2
C3
C4
C5
C8
C9
C10
C11
C13
C14
C15
C17
C18
C19
C21
C22
C23
C24
C30
C31
C34
C36
C37
C38
1nF
1nF
1 nF
10nF
56pF
100pF
100pF
100pF
10µF
100nF
100nF
100pF
100nF
100nF
2pF
1nF
33nF
47pF
1nF
18pF
330nF
100nF
56pF
NC
100nF
C41
C42
C43
C46
C47
D1
L3
L5
L6
L7
L8
L9
L10
L11
R7
R8
R9
R10
R11
R12
S1
T1
X1
4·7µF
3·3nF
100nF
100pF
100pF
IT397
220nH
1·8nH
220nH
220nH
1µH
220nH
680nH
680nH
15kΩ
22kΩ
15kΩ
1kΩ
4·7kΩ
50Ω
Resonator (Figure 6)
BCW31
4MHz crystal
Table 1 Component values for Figure 5
0·5
0·5
1·5
1·0
1·5
0·5
3
3
3
Figure 6 Microstrip resonator (dimensions are in mm)
5
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