MITEL SL2017, SL2017KG, SL2017MP1S, SL2017MP1T Datasheet

FEATURES

■ Single chip full band solution, compatible with
digital and analog transmissions

■ Low noise RF input

■ High input signal handling to eliminate the

requirement for front end AGC

■ Low phase noise local oscillator buffer optimised
for low symbol rate applications

■ Low radiation design

■ IF AGC amplifier with dual selectable outputs

■ ESD protection. (Normal ESD handling

procedures should be observed)

ORDERING INFORMATION

SL2017/KG/MP1S (Tubes)
SL2017/KG/MP1T (Tape and Reel)

The SL2017 is a fully integrated mixer with output AGC,

intended primarily for application in satellite tuners, where it
downconverts the first high IF from the outdoor unit to the
second IF for data demodulation.

The device contains a low noise RF input amplifier and

mixer functioning to 2.15GHz, an integrated low phase noise
local oscillator buffer and an AGC IF output buffer amplifier.
The IF signal is available at one of two outputs selected by the
IF-OP-SEL input.

The signal handling of the SL2017 is sufficient to greatly

simplify or remove the requirement for input AGC with
appropriate image filtering in full band systems, or to remove
the requirement for band limit filtering with appropriate AGC
in half band systems.

APPLICATIONS

■ Satellite tuners

■ Communications systems

Fig.1 Pin connections - top view

MP16

VEE-RF

RF INPUTB

RF INPUT

VCC-RF

VCC-LO

LO

LOB

VEE-LO

AGC CONTROL
IF OUTPUT1
IF OUTPUT1B
VCC-IF
VEE-IF
IF OUTPUT2
IF OUTPUT2B
IF OP SEL

16
15
14
13
12
11
10
9

1
2
3
4
5
6
7
8

SL2017

Full Band Satellite Tuner

Preliminary Information

DS4889 - 1.2 may 1998

2

SL2017

QUICK REFERENCE DATA

Characteristic Units

RF input noise figure 18 dB
Maximum conversion gain 33 dB
Minimum conversion gain -5 dB
IF1 and IF2 output gain match 2 dB
IP3

2T

input referred at minimum conversion gain +3 dBm

IP22T input referred at minimum conversion gain +17 dBm

Fig. 2 Block diagram

LO

LOB

6

7

15

14

IF OUTPUT1

IF OUTPUT1B

11

10

IF OUTPUT2

IF OUTPUT2B

16

AGC CONTROL

9

IF-OP-SEL

2
3

RF INPUTB

RF INPUT

4, 5, 13

1, 8, 12

V

CC

V

EE

3

SL2017

The SL2017 is a downconverter mixer with an output AGC
amplifier, which when used with appropriate external varactor
tuned oscillator performs the first IF tuning function for a full
band satellite receiver system. A block diagram is contained
in Fig. 2.

In application the RF input of the device is interfaced
through appropriate impedance matching to the first IF
signal, which is downlinked from the outdoor unit at typically
950-2150MHz. The RF input preamplifier of the device is
designed for low noise figure and for low distortion so
eliminating the requirement for RF AGC. The preamplifier
also provides gain to the mixer section and back isolation from
the local oscillator section.

The output of the preamplifier is fed to the mixer section
where the RF signal is mixed with the local oscillator
frequency, which is generated by an external oscillator.

Signals from the mixer are fed to the AGC IF amplifier,
which gives an overall conversion gain programmable from

-10 to +30dB. The output of this stage can be switched to one
of two outputs to facilitate IF processing.

FUNCTIONAL DESCRIPTION

Fig. 3 RF input matching network

Fig. 4 Typical external VCO application circuit

6.2nH
TO DEVICE

0.7pF

Fig. 5 LO buffer input impedance

0.50.2 10

+j0.2

+j0.5

+j1

+j2

+j5

2 5

–j5

–j2

–j1

–j0.5

–j0.2

FREQUENCY

MARKERS AT 1.3GHz,

S11:Z0 = 50

Ω

X

X

X

X

NORMALISED

T

O 50

Ω

1.8GHz, 2.3GHz

, 2..8GHz

X

C20
47pF

C22

47pF

1nF

5V

5V

C4
100pF

C5
100pF

C10

1nF

Varactor Line

R1
2K7

R2
5K6R3270

C12
100pF

5V

DV1
IT379

C17

0.5pF

C18

NC

DV2

IT379

R6
22K

TR2

BFR182

C21
100pF

C19
100nF

C52

0.5pF

L1
10nH

34

12

TL1

SNIFFER

R11
22

RF

RF B

C23
2p2F

C24

100pF

RF INPUT

3

Vcc RF

4

LO

6

LO B

7

Vcc LO

5

Vee LO

8

4

SL2017

Fig. 6 IP3 variation with gain setting (minimum)

-20 -10 10 20

30 40

-5

-10

-15

-20

-25

IP3 (dBm)

Conversion gain
(dB)

+5

Applies for a constant IF output level of -14dBm

Applies for a constant IF output level of -14dBm

-20 -10 10 20

30 40

-5

-10

-15

-20

+15

+10

+5

IP2 (dBm)

Fig. 7 IP2 variation with gain setting (minimum)

5

SL2017

Fig. 8 Variation of 1dB gain compression (P1dB) with gain setting (typical)

-10

-20

-30

+10

+30

+20

X

X

X

0

-10

RF input level at P1dB (dBm)

Gain setting (dB)

AGC voltage (V)

Conversion gain (dB)

-20

-15

-10

-5

0

5

10

15

20

25

30

1.2

1.4

1.6

1.8 2

2.2 2.4 2.6

2.8 3

3.2 3.4 3.6 3.8

4

35

Fig.9 Gain variations with AGC voltage (typical)

6

SL2017

RF inputs IF output select input

Local oscillator inputs

IF outputs

AGC input

Fig. 10 Input/Output interface circuits

V

REF4

AGC

12K

CONTROL

2K

V

REF 1

300 300

RF INPUTS

V

REF 3

V

cc

IF-OP-SEL

OUTPUT

50

50

OUTPUTB

V

REF 2

1K 1K

TANK

TANKB

LO

LOB