Rainbow Electronics MAX2056 - Manual (Page 10)

MAX2056
Detailed Description
The MAX2056 general-purpose, high-performance VGA
with analog gain control is designed to interface with
50
Ω systems operating in the 800MHz to 1000MHz fre-
quency range.
The MAX2056 integrates two attenuators to provide
22dB or 44dB of precision analog gain control, as well
as a two-stage amplifier that has been optimized to
provide high gain, high IP3, low noise figure, and low-
power consumption. The bias current of each amplifier
stage can be adjusted by individual external resistors
to further reduce power consumption for applications
that do not require high linearity.
800MHz to 1000MHz Variable-Gain
Amplifier with Analog Gain Control
10 ______________________________________________________________________________________
MAX2056
27
EP
26
25
24
23
32 31 30 29 28
GND
V GC
GND
GND
GND
OUT
GND
GND
GND
GND
GND
GND
GND
OUT_A
GND
IN_A
C4
C7
C6
C10
C13
C5
RF
OUTPUT
R1
R2
C2
C1
C15 C9
C3
V CC
V CC
V
CC
C14 C8
V
CC
RF INPUT*
*NOTE: CONNECT THE INPUT ACCORDING TO THE SOLID BOLD LINE IF ONE ATTENUATOR
IS USED. CONNECT THE INPUT ACCORDING TO THE BROKEN LINE IF TWO ATTENUATORS ARE USED.
V CC
V CC
GND GND IN GND GND V
CC
GND GND ATTN_OUT
AMP_IN
GND
36 35 34 33
14 15 16 17 18 10 11 12 13
22
20
21
19
5
4
3
2
9
8
7
6
1
+
-
ATTENUATION
CONTROL
CIRCUITRY
V
CC
V
CNTL GND V
CC
GND
R
SET1 V
CC
R
SET2 GND
Figure 1. Typical Application Circuit