3

SL2030

Electrical Characteristics (continued)

139

117

1·0

294

1

95

25

Characteristic

Two tones at 92dB

µV

Two tones at 92dB

µV

128 channels at 62dB

µV

Maximum tuning range 0·9GHz within

band, application as in Figure 6

Application as Figure 6. See Figure 5 for

a typical device

To device input

To device input

Into 50

Ω load

See Figure 4

Conditions

Max.

Min.

Value

Units

dB

µV

dB

µV

dBc

GHz

dBc/Hz

GHz

dB

µV

dB

µV

dB

µV

Ω

Typ.

153

126

2·1

285

1·3

72

92

75

145

121

262

287

IIP2

IIP3

Composite 2nd order

LO operating range

LO phase noise, SSB at 10kHz

offset

IF output frequency range

LO and harmonic leakage

to RF input

Fundamental

2nd harmonic

LO Prescaler output swing

LO Prescaler output impedance

IF output impedance

Pin

12,13

1,16

7,8

7,8

10

10

1,16

Application Notes

Figure 6 shows the SL2030 in a typical upconverter application.

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 a cable, via

passive LPF and PlN-diode attenuator all designed for 75

Ω

characteristic impedance.

The network connected to the IF output pin 1 and pin 16 is

a broadband tuned balun centred typically on 1·1 GHz.

This matches the device output impedance of nominally

400

Ω (balanced) to 50Ω (unbalanced).

Figure 3 Approximate model of RF input

Figure 4 Approximate model of IF output

Figure 5 Phase noise performance

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

shortening the line (top end) or by physically moving C19

(see Figure 6) closer to the LO pins. This extends the

bottom end of the tuning range.

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.

3·3p

6

6

820

PIN 7

PIN 8

2p

325

PIN 1

PIN 16

50 100

200

300

400

500

600

700

800 850

RF INPUT FREQUENCY (MHz)

288

289

290

291

292