Rainbow-electronics MAX19995 Manual do Utilizador descarregar pdf (Página 27)

MAX19995

Dual, SiGe, High-Linearity, 1700MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

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Table 1. Component Values

COMPONENT VALUE DESCRIPTION

C1, C2, C7, C8, C14, C16 39pF Microwave capacitors (0402)

C3, C6 0.033µF Microwave capacitors (0603)

C4, C5 — Not used

C9, C13, C15, C17, C18 0.01µF Microwave capacitors (0402)

C10, C11, C12, C19, C20, C21 150pF Microwave capacitors (0603)

L1, L2, L4, L5 330nH Wire-wound high-Q inductors (0805)

L3, L6 10nH

Wire-wound high-Q inductors (0603). Smaller values can be

used at the expense of some performance loss (see the

Typical Operating Characteristics).

806Ω

± 1% r esi stor s ( 0402) . U sed for D C S/PC S b a n d , V

C C

= +5 .0 V

ap p l i cati ons. Lar g er val ues can b e used to r ed uce p ow er at the

exp ense of som e p er for m ance l oss.

681Ω

±1% resistors (0402). Used for UMTS band, V

= +5.0V

applications. Larger values can be used to reduce power at

the expense of some performance loss.

R1, R4

909Ω ±1% resistors (0402). Used for V

= +3.3V applications.

2.32kΩ

± 1% r esi stor s ( 0402) . U sed for D C S/PC S b a n d , V

C C

= +5 .0 V

ap p l i cati ons. Lar g er val ues can b e used to r ed uce p ow er at the

exp ense of som e p er for m ance l oss.

1.5kΩ

±1% resistors (0402). Used for UMTS band, V

= +5.0V

applications. Larger values can be used to reduce power at

the expense of some performance loss.

R2, R5

2.49kΩ ±1% resistors (0402). Used for V

= +3.3V applications.

R3, R6 0Ω 0Ω resistors (1206)

T1, T2 4:1

Transformers (200:50)

U1 — MAX19995 IC

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MAX19995 1

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