參數(shù)資料
型號(hào)： MAX2047ETJ-T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 無(wú)繩電話/電話
英文描述： High-Gain Vector Multipliers
中文描述： TELECOM, CELLULAR, BASEBAND CIRCUIT, QCC32
封裝： 5 X 5 MM, 0.80 MM HEIGHT, TQFN-32
文件頁(yè)數(shù)： 17/22頁(yè)
文件大?。?/td> 999K
代理商： MAX2047ETJ-T
Detailed Description
The MAX2045/MAX2046/MAX2047 provide vector
adjustment through the differential I/Q amplifiers. Each
part is optimized for separate frequency ranges:
MAX2045 for f
IN
= 2040MHz to 2240MHz, MAX2046 for
f
IN
= 1740MHz to 2060MHz, and MAX2047 for f
IN
=
790MHz to 1005MHz. All three devices can be inter-
faced using current- and/or voltage-mode DACs.
The MAX2045/MAX2046/MAX2047 accept differential
RF inputs, which are internally phase shifted 90
degrees to produce differential I/Q signals. The phase
and magnitude of each signal can then be adjusted
using the voltage- and/or current-control inputs.
Figure 1 shows a typical operating circuit when using
both current- and voltage-mode DACs. When using
only one of the two, leave the unused I/Q inputs open.
RF Ports
The RF input and output ports require external matching
for optimal performance. See Figures 1 and 2 for appro-
priate component values. The output ports require
external biasing. In Figures 1 and 2, the outputs are
biased through the balun (T2). The RF input ports can
be driven differentially or single ended (Figures 1, 2)
using a balun. The matching values for the MAX2045/
MAX2046 were set to be the same during characteriza-
tion. An optimized set of values can be found in the
MAX2045/MAX2046/MAX2047 Evaluation Kit
data
sheet.
I/Q Inputs
The control amplifiers convert a voltage, current, or
voltage and current input to a predistorted voltage that
controls the multipliers. The I/Q voltage-mode inputs
can be operated differentially (Figure 1) or single
ended (Figure 2). A 2.5V reference is provided on-chip
for single-ended operation.
M
High-Gain Vector Multipliers
______________________________________________________________________________________
17
Pin Description
PIN
1
2
3
4
5
6
7
8
NAME
VI1
VI2
VQ1
VQ2
II1
II2
IQ1
IQ2
FUNCTION
Noninverting in-phase voltage-control input. Requires common-mode input voltage (2.5V typ).
Inverting in-phase voltage-control input. Requires common-mode input voltage (2.5V typ).
Noninverting quadrature voltage-control input. Requires common-mode input voltage (2.5V typ).
Inverting quadrature voltage-control input. Requires common-mode input voltage (2.5V typ).
Noninverting in-phase current-control input. This pin can only sink current. It cannot source current.
Inverting in-phase current-control input. This pin can only sink current. It cannot source current.
Noninverting quadrature current-control input. This pin can only sink current. It cannot source current.
Inverting quadrature current-control input. This pin can only sink current. It cannot source current.
2.5V Reference Output. Integrated reference voltage provides a 2.5V output for single-ended voltage-
control applications. For single-ended operation, connect REFOUT to the inverting voltage inputs (VI2,
VQ2).
9
REFOUT
10, 11, 14,
15, 16, 19,
20, 21,
23
–
27, 30,
31, 32
12
13
17, 18
GND
Ground
RFOUT1
RFOUT2
V
CC
Noninverting RF Output
Inverting RF Output
Supply Voltage
22
RBIAS
Bias Setting Resistor. Connect a 280
(
±
1%) resistor from this pin to ground to set the bias current for
the IC.
28
29
RFIN1
RFIN2
Noninverting RF Input
Inverting RF Input
Exposed
Pad
—
Exposed Pad. Exposed pad on the bottom of the IC should be soldered to the ground plane for proper
heat dissipation and RF grounding.
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