LTC5577

10

5577f

For more information www.linear.com/LTC5577

TesT circuiT

APPLICATION

RF MATCH

LO MATCH

IF MATCH

RF (MHz)

LO

C3

C4

L3

C5

C6

L1, L2

300 to 400

HS

330pF

18pF

2.2nH

47pF

15pF

560nH

375 to 525

HS

330pF

15pF

2nH

27pF

8.2pF

560nH

700 to 1000

HS

330pF

6pF

—

6.8pF

2.7pF

560nH

1300 to 4300

LS, HS

8.2pF

0.7pF

—

3.9pF

—

560nH

4900

LS

1.8nH (L)

0.7pF

—

1pF

—

10nH*

5900

LS

0.25pF

—

—

1pF

—

10nH*

LS = Low side, HS = High side. *IF = 900MHz

REF DES

VALUE

SIZE

VENDOR

C1, C2, C7, C8

1nF

0402

Murata

C3 - C6

See Table

0402

Murata

R1, R2

115Ω, 1%

0402

C9

1µF

0603

AVX

L1, L2

See Table

0603

Coilcraft 0603LS

L3

See Table

0402

Coilcraft 0402HP

Figure 1. Standard Downmixer Test Circuit Schematic (Wideband 100Ω Differential IF Output)

RF

0.015"

0.062"

0.015"

GND

BIAS

GND

DC2070A

EVALUATION BOARD

LAYER STACK-UP

(NELCO N4000-13)

DC2070A

EVAL BOARD

50

C3

C4

5577 F01

NC

EN

3.3V

180mA

C1

C9

NC

LTC5577

LO

IADJ

C5

C6

17

GND

2

3

RF

1 GND

4 GND

GND 9

6

5

7

8

EN

TEMP

12

11

10

GND

GND

16

14

15

13

50

50

50

50

180°

0°

C8

C7

R1

R2

L1

L2

L3

C2

180°

COMBINER