MAX2057 查看數據表（PDF） - Maxim Integrated

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MAX2057

1700MHz to 2500MHz Variable-Gain Amplifier with Analog Gain Control

Maxim Integrated 

1700MHz to 2500MHz Variable-Gain

Amplifier with Analog Gain Control

Pin Description

PIN

1, 3, 4, 6, 7,

9, 10, 12, 14,

18, 19,

21–24, 27,

28, 30, 31,

33, 34, 36

2

NAME

GND

OUT_A

FUNCTION

Ground. Connect to the board’s ground plane using low-inductance layout techniques.

Second-Attenuator Output. Internally matched to 50Ω over the operating frequency band. Connect to

IN through a DC-blocking capacitor if greater than 21dB of gain-control range is required. No

connection is required if the second attenuator is not used.

5, 13, 16, 25,

32

VCC

Power Supply. Bypass each pin to GND with capacitors as shown in the Typical Application Circuit.

Place capacitors as close to the pin as possible.

Second-Attenuator Input. Internally matched to 50Ω over the operating frequency band. Connect to a

8

IN_A

50Ω RF source through a DC-blocking capacitor if greater than 21dB of gain-control range is

required. No connection is required if the second attenuator is not used.

11

15

17

20

26

29

35

Exposed

Paddle

VCNTL

RSET1

RSET2

OUT

Analog Gain-Control Input. Limit voltages applied to this pin to a 1V to 4.5V range when VCC is

present to ensure device reliability.

First-Stage Amplifier Bias-Current Setting. Connect to GND through a 1.2kΩ resistor.

Second-Stage Amplifier Bias-Current Setting. Connect to GND through a 2kΩ resistor.

RF Output. Internally matched to 50Ω over the operating frequency band. Requires a DC-blocking

capacitor and a shunt-matching capacitor.

AMP_IN

Amplifier Input. Internally matched to 50Ω over the operating frequency band. Connect to ATTN_OUT

through a DC-blocking capacitor.

ATTN_OUT Attenuator Output. Internally matched to 50Ω over the operating frequency band. Connect to AMP_IN

through a DC-blocking capacitor.

IN

RF Input. Internally matched to 50Ω over the operating frequency band. Connect to a 50Ω RF source

through a DC-blocking capacitor if the second attenuator is not used.

GND

Exposed Paddle Ground Plane. This paddle affects RF performance and provides heat dissipation.

This paddle MUST be soldered evenly to the board’s ground plane for proper operation.

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