8

RF Device Data

Freescale Semiconductor

MRF372R3 MRF372R5

+

Figure 10. 470-860 MHz Broadband DC Bias Networks

L3

R9A

R9B

R5

GATE

DRAIN

L2

R6

C9

R7

C7

C18

C17

C16

C8

R2

R3

R4T

+

Table 6. 470-860 MHz Broadband DC Bias Networks Component Designations and Values

Designation

Description

C1

0.7 pF Chip Capacitor, ATC

C2, C13

0.8 — 8.0 pF Variable Capacitors, Johansen Gigatrim

C3A, B, C14A, B, C, D

100 pF Chip Capacitors, ATC

C4

4.7 pF,Chip Capacitor, ATC

C5

7.5 pF Chip Capacitor, ATC

C6

10.0 pF Chip Capacitor, ATC

C7A, B

6.2 pF Chip Capacitors, ATC

C8A, B

22 mF, 22 V Tantalum Chip Capacitors, Kemet #T491D226K22AS

C9A, B

0.1 mF, 100 V Chip Capacitors, Vitramon #VJ3640Y104KXBAT

C10

13 pF Chip Capacitor, ATC

C11

6.8 pF Chip Capacitor, ATC

C12

3.9 pF Chip Capacitor, ATC

C15A, B

3.3 pF Chip Capacitors, ATC

C16A, B

10 mF, 35 V Tantalum Chip Capacitors, Kemet #T491D106K35AS

C17A, B

3.3 mF, 100 V Chip Capacitors, Vitramon #VJ3640Y335KXBAT

C18A, B

0.01 mF Chip Capacitors, ATC

L1A, B

12.55 nH, Coilcraft #1606-10

L2A, B

5.45 nH, Coilcraft #0906-5

L3A, B, C

12.5 nH, Coilcraft #A04T

R1A, B

10 Ω, 1/4 W Chip Resistors, Vishay Dale (1210)

R2A, B

2.2 kΩ, 1/4 W Chip Resistors, Vishay Dale (1210)

R3A, B, R10A, B

390 Ω, 1/8 W Chip Resistors, Vishay Dale (1206)

R4TA, B

520 Ω, Thermistor, Vishay #NTHS—1206J14520R5%

R5A, B

6.2 Ω, 1/4 W Chip Resistors, Vishay Dale (1210)

R6A, B

6.8 kΩ, 1/4 W Chip Resistors, Vishay Dale (1210)

R7

100 kΩ Potentiometer, Bourns

R8

47.3 kΩ, 1/8 W Chip Resistor, Vishay Dale (1206)

R9A, B, C, D

180 Ω, 1/4 W Chip Resistors, Vishay Dale (1210)

PCB

MRF372 Printed Circuit Board Rev 1a, Rogers RO4350,

Balun A, B

Vertical 660 MHz Broadband Balun, Printed Circuit Board