max2057etxt Maxim Integrated Products, Inc., max2057etxt Datasheet - Page 9

• Manufacturer Part Number: max2057etxt
• Description: Max2057 1700mhz To 2500mhz Variable-gain Amplifier With Analog Gain Control
• Manufacturer: Maxim Integrated Products, Inc.

9, 10, 12, 14,
5, 13, 16, 25,
1, 3, 4, 6, 7,
21–24, 27,
28, 30, 31,
33, 34, 36
Exposed
Paddle
18, 19,
PIN
32
11
15
17
20
26
29
35
2
8
ATTN_OUT
AMP_IN
OUT_A
NAME
V
R
R
GND
IN_A
GND
OUT
V
CNTL
SET1
SET2
_______________________________________________________________________________________
IN
CC
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.
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
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.
Analog Gain-Control Input. Limit voltages applied to this pin to a 1V to 4.5V range when V
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.
Amplifier Input. Internally matched to 50Ω over the operating frequency band. Connect to ATTN_OUT
through a DC-blocking capacitor.
Attenuator Output. Internally matched to 50Ω over the operating frequency band. Connect to AMP_IN
through a DC-blocking capacitor.
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.
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.
1700MHz to 2500MHz Variable-Gain
Amplifier with Analog Gain Control
FUNCTION
Pin Description
CC
is
9