LT5546

11

5546f

Figure 7. Component Side Silkscreen of Evaluation Board

Figure 8. Component Side Layout of Evaluation Board

Figure 9. Bottom Side Silkscreen of Evaluation Board

Figure 10. Bottom Side Layout of Evaluation Board

APPLICATIO S I FOR ATIO

Figure 11. 2.4GHz to 2.5GHz Receiver Application (RX IF = 280MHz)

EN

STBY

0

°

90

°

1.8V

1

µF

1nF

280MHz

IF SAW BP FILTER

10pF

5546 F11

f/2

LT5546

16

15

7

6

14

13

12

9

2

3

11

10

15nH

15nH

39nH

3.3pF

3.3pF

IF DET

I-MIXER

Q-MIXER

HARD

CLIPPER

HARD

CLIPPER

LPF

LPF

5, 8

RX

FRONT END

MAIN

SYNTHESIZER

AUX

SYNTHESIZER

RX INPUT:

2.4GHz TO 2.5GHz

Q-OUTPUTS

I-OUTPUTS

A/D

A/D

D/A

A/D

BASEBAND

PROCESSOR

1,4,17

1ST LO,

2.12GHz

TO 2.22GHz

2ND LO,

560MHz

–10dBm

VGA

Evaluation Board

The evaluation circuit schematic is drawn in Figure 6. The

components associated with buffers U2 and U3 are in-

cluded to drive a 50

Ω load for evaluation purposes only.

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

There is a unity voltage gain relationship for AC signals

between the evaluation board outputs (I and Q) and the

when the evaluation board outputs are terminated in 50

Ω.