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Электронный компонент: MAX2102

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General Description
The MAX2102/MAX2105
are low-cost direct-conver-
sion tuner ICs designed for use in digital direct-broad-
cast satellite (DBS) television set-top box units. The
direct-conversion architecture reduces system cost
compared to devices with IF-based architectures.
The MAX2102/MAX2105 directly tune L-band signals to
baseband using a broadband I/Q downconverter.
Operating frequency range spans from at least 950MHz
to 2150MHz.
The ICs include a low-noise amplifier (LNA) with auto-
matic gain control (AGC), two downconverter mixers,
an oscillator buffer with 90 quadrature generator and
prescaler, and baseband amplifiers.
The MAX2102 features an AGC range of 50dB, allowing
input power levels as low as -69dBm. The MAX2105
has a reduced AGC range of 41dB and accepts input
power levels down to -60dBm. The reduced AGC range
of the MAX2105 allows the use of a high-gain external
LNA to achieve a lower system noise figure (NF).
________________________Applications
DBS Tuners
Wireless Local Loop
DVB-Compliant DBS Tuners
Broadband Systems
Cellular Base Stations
LMDS
____________________________Features
o
Low-Cost Bipolar Design, Lowest Cost
Architecture
o
Operate from a Single +5V Supply
o
950MHz to 2150MHz Input Frequency Range*
o
On-Chip Quadrature Generator, Dual-Modulus
Prescaler (/64, /65)
o
Input Levels
-69dBm to -19dBm per Carrier (MAX2102)
-60dBm to -19dBm per Carrier (MAX2105)
o
Over 50dB AGC Control Range (MAX2102)
o
Noise Figure = 13.2dB (MAX2102);
IP3 = 6.5dBm (at 1450MHz)
o
Automatic Baseband Offset Correction
o
Easy Interface to MAX1002/MAX1003 Dual ADC
and Popular Baseband ICs
MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
________________________________________________________________
Maxim Integrated Products
1
MAX2102
MAX2105
Q
I
V
CC
QOUT
GND
GND
AGC
GND
RFIN
V
CC
GND
V
CC
GND
IOUT
V
CC
OFFSET CORRECTION
/64, /65
90
0
RFIN
QDC
IDC
IDC
GND
V
CC
LO
V
CC
GND
PSGND
PSOUT
MOD
V
CC
LO
QDC
14
13
12
11
10
9
8
7
6
5
4
3
2
1
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Functional Diagram
19-1256; Rev 2; 10/98
PART
MAX2102
CWI
0C to +70C
TEMP. RANGE
PIN-PACKAGE
28 SO
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Ordering Information
Patents pending
*
Contact factory for MAX2102/MAX2105 versions with expanded frequency range.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX2105
CWI
0C to +70C
28 SO
AGC Input Bias Current
MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +4.75V to +5.25V; GND = 0V; PSGND = GND; AGC = 1.3V; MOD = 0.8V; P
RFIN
= OFF, f
LO
= 1450.125MHz; P
LO
= -15dBm;
IOUT, QOUT = open; T
A
= 0C to +70C; unless otherwise noted.)
AC ELECTRICAL CHARACTERISTICS
(MAX2102 EV kit circuit (Figure 1); V
CC
= +5V; PSGND = open; MOD = GND; f
RFIN
= 2150MHz; P
RFIN
= -19dBm; f
LO
=
2150.125MHz; P
LO
= -15dBm driven single-ended into LO; AGC set via servo loop for V
IOUT
= V
QOUT
= 0.5Vp-p; IOUT, QOUT drive
AC-coupled 100
loads; 2k
from PSOUT to GND; T
A
= +25C; unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to GND ..............................................................-0.5V to +7V
RFIN to RFIN ..........................................................................2V
LO to LO ................................................................................2V
AGC, MOD, RFIN, RFIN, LO, LO to GND .....-0.5V to (V
CC
+ 0.5V)
AGC Current. ....................................................................30mA
IDC to IDC, QDC to QDC.......................................................2V
IOUT or QOUT to GND Short-Circuit Duration ...................10sec
PSOUT to GND Short-Circuit Duration.................................None
IDC, IDC, QDC, QDC to GND ....................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +70C)
SO (derate 12.5mW/C above +70C) ..........................1.025W
Operating Temperature Range...............................0C to +70C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
MAX2102
0V
V
MOD
V
CC
CONDITIONS
mA
150
195
Quiescent Supply Current
V
4.75
5.25
Operating Supply Voltage Range
V
2.2
2.6
IOUT, QOUT Common-Mode Voltage
-250
180
V
0.8
MOD Input Low Level
V
2.0
MOD Input High Level
A
-80
10
MOD Input Bias Current
UNITS
MIN
TYP
MAX
PARAMETER
Refers to single-carrier power generating
V
IOUT
= V
QOUT
= 0.5Vp-p,
950MHz < f
RFIN
< 2150MHz,
950MHz < f
LO
< 2150MHz (Note 2)
(Note 1)
Refers to single-carrier power generating
V
IOUT
= V
QOUT
= 0.5Vp-p,
950MHz < f
RFIN
< 2150MHz,
950MHz < f
LO
< 2150MHz (Note 2)
CONDITIONS
dBm
RFIN Maximum Single-Carrier
Input Power
MHz
950
2150
RFIN Carrier Frequency Range
dBm
-69
RFIN Minimum Single-Carrier
Input Power
50
UNITS
MIN
TYP
MAX
PARAMETER
-19
MAX2102
MAX2105
-60
0.5V
V
AGC
4V
dB
41
AGC Range
MAX2102
MAX2105
RF FRONT END
MAX2105
A
-180
180
AGC Input Bias Current
SUPPLY
CONTROL INPUTS, PRESCALER
0.5V
V
AGC
4V
1V
V
AGC
4V
1V
V
AGC
4V
MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
_______________________________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS
(MAX2102 EV kit circuit (Figure 1); V
CC
= +5V; PSGND = open; MOD = GND; f
RFIN
= 2150MHz; P
RFIN
= -19dBm; f
LO
=
2150.125MHz; P
LO
= -15dBm driven single-ended into LO; AGC set via servo loop for V
IOUT
= V
QOUT
= 0.5Vp-p; IOUT, QOUT drive
AC-coupled 100
loads; 2k
from PSOUT to GND; T
A
= +25C; unless otherwise noted.)
P
RFIN
= -19dBm per tone, AGC set via servo loop for
V
IOUT
= V
QOUT
= 0.5Vp-p per tone,
f1
RFIN
= 1448.1MHz, f2
RFIN
= 1449MHz,
f
LO
= 1451MHz
P
RFIN
= -19dBm per tone, AGC set via servo loop for
V
IOUT
= V
QOUT
= 0.5Vp-p per tone,
f1
RFIN
= 1200MHz, f2
RFIN
= 2150MHz,
f
LO
= 951MHz
f
RFIN
= 1441MHz,
f
LO
= 1451MHz
CONDITIONS
dBm
6.5
RFIN Input Third-Order Intercept
11.2
dBm
15.1
RFIN Input Second-Order Intercept
13.2
12.9
UNITS
MIN
TYP
MAX
PARAMETER
f
RFIN
= 950MHz to 2150MHz, 50
source
Defined as
NF/
Gain; for AGC range,
defined as single-carrier power range
of -69dBm to -59dBm (MAX2102) or
-60dBm to -50dBm (MAX2105)
950MHz < f
RFIN
< 2150MHz, 950MHz < f
LO
<
2150MHz. Dominated by LO second-harmonic power
causing downconversion of unwanted channel. Test
conditions: f
LO
= 1075.5MHz, f
RFIN
= 2150MHz,
P
RFIN
= -69dBm (MAX2102) or -60dBm (MAX2105)
P
LO
= -15dBm, 950MHz < f
LO
< 2150MHz (Note 3)
P
LO
= -15dBm, P
LO
= -15dBm (differentially driven),
950MHz < f
LO
< 2150MHz (Note 3)
2.3:1
dB/dB
-0.5
Maximum Noise-Figure Variation with
AGC Gain Setting
RFIN Worst-Case VSWR across
Band
dBc
-32.3
Maximum Power of Spurious
Downconversion Products
dBm
-49
-54
LO Leakage at RFIN
P
RFIN
= -69dBm
AGC = 4V,
P
RFIN
set via servo
loop for V
IOUT
=
V
QOUT
= 0.5Vp-p
MAX2102
MAX2102
dB
P
RFIN
= -60dBm
MAX2105
15.7
P
RFIN
= -69dBm
f
RFIN
= 2141MHz,
f
LO
= 2151MHz
Noise Figure
MAX2105
P
RFIN
= -60dBm
15.5
MAX2102
MAX2105
11.5
MAX2102
MAX2105
-0.7
MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
4
_______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2102 EV kit circuit (Figure 1); V
CC
= +5V; PSGND = open; MOD = GND; f
RFIN
= 2150MHz; P
RFIN
= -19dBm; f
LO
=
2150.125MHz; P
LO
= -15dBm driven single-ended into LO; AGC set via servo loop for V
IOUT
= V
QOUT
= 0.5Vp-p; IOUT, QOUT drive
AC-coupled 100
loads; 2k
from PSOUT to GND; T
A
= +25C; unless otherwise noted.)
2k
|| 10pF load
T
A
= 0C to +70C
(Note 2)
(Note 1)
At -3dB attenuation
P
RFIN
= -50dBm; AGC = 4V, V
CC
= 5.0V
PSOUT load = 2k
|| 5pF (Note 3)
Vp-p
0.8
Prescaler Output Swing at PSOUT
950MHz < f
RFIN
< 2150MHz;
950MHz < f
LO
< 2150MHz; P
RFIN
= -40dBm;
f
IOUT
, f
QOUT
= 125kHz (Note 2)
950MHz < f
RFIN
< 2150MHz;
950MHz < f
LO
< 2150MHz; P
RFIN
= -40dBm;
f
IOUT
, f
QOUT
= 125kHz (Note 2)
f
LO
= 950MHz to 2150MHz, 50
source into
MAX2102 EV kit match circuit
(Note 4)
Refers to power level driven into LO,
LO (differentially driven) (Notes 2, 4)
65
65
(Notes 2, 5)
CONDITIONS
64
64
Prescaler Divide Ratio
MHz
94
Baseband Bandwidth
(at IOUT, QOUT)
Vp-p
2.7
IOUT, QOUT Clipping Level
%
35
65
Prescaler Duty Cycle at PSOUT
1kHz < (f
IOUT,
f
QOUT
) < 25MHz, 950MHz < f
RFIN
<
2150MHz, 950MHz < f
LO
< 2150MHz (Notes 3, 7, 8)
1kHz < (f
IOUT,
f
QOUT
) < 25MHz, 950MHz < f
RFIN
<
2150MHz, 950MHz < f
LO
< 2150MHz (Notes 3, 7, 8)
ns
0.45
dB
0.45
0.85
Baseband Gain Ripple
(at IOUT, QOUT)
Baseband Group Delay Ripple
(at IOUT, QOUT)
MHz
950
2150
LO Input Frequency Range
dB
0.5
IOUT, QOUT Amplitude Imbalance
degrees
3
IOUT, QOUT Phase Imbalance
1.75:1
LO Input Worst-Case VSWR over
Band
-15
-5
LO Input Power Level
dBm
-15
dB
28
RFIN to LO Input Isolation
UNITS
MIN
TYP
MAX
PARAMETER
MOD = low
MOD = high
T
A
= +25C to +70C (Notes 2 and 6)
degrees
-0.1
0.6
Worst-Case Additional Phase
Imbalance Over Temperature
T
A
= +25C to +0C (Note 2)
-0.07
1
OSCILLATOR BUFFER, QUADRATURE GENERATOR, PRESCALER
BASEBAND AC CHARACTERISTICS
MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
_______________________________________________________________________________________
5
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2102 EV kit circuit (Figure 1); V
CC
= +5V; PSGND = open; MOD = GND; f
RFIN
= 2150MHz; P
RFIN
= -19dBm; f
LO
=
2150.125MHz; P
LO
= -15dBm driven single-ended into LO; AGC set via servo loop for V
IOUT
= V
QOUT
= 0.5Vp-p; IOUT, QOUT drive
AC-coupled 100
loads; 2k
from PSOUT to GND; T
A
= +25C; unless otherwise noted.)
(Note 3)
(Note 3)
V
CC
= 5V + 50mVp-p at 300kHz. Amplitude of
300kHz relative to 500mVp-p measured at IOUT,
QOUT. Measured using MAX2102 EV kit.
CONDITIONS
4.7
10
IOUT, QOUT Output Impedance
1
Maximum IOUT to QOUT Output
Impedance Difference
dB
32
Power-Supply Ripple Rejection
(measured at IOUT, QOUT)
UNITS
MIN
TYP
MAX
PARAMETER
Note 1:
All specifications with guaranteed min/max limits are met within this frequency range. Contact factory for
MAX2102/MAX2105 versions with expanded frequency range.
Note 2:
Guaranteed by production test and/or design and characterization.
Note 3:
Guaranteed by design and characterization.
Note 4:
IOUT, QOUT Phase and Amplitude Imbalance specifications are met within this LO power range.
Note 5:
Tested under two conditions: 1) Normal test: P
RFIN
= -20dBm, and 2) Overdrive test: P
RFIN
= -5dBm but AGC set via servo
loop for V
IOUT
= V
QOUT
= 0.5Vp-p for P
RFIN
= -30dBm.
Note 6:
Negative numbers (-0.1) indicate improvement in quadrature accuracy with increasing temperature.
Note 7:
Includes contribution from front-end gain tilt and delay variations produced by varying f
RFIN
by 30MHz.
Note 8:
1kHz minimum frequency determined by 0.22F offset-correction capacitors. Different value capacitors yield proportionally
different low-frequency cutoffs. Group delay at low frequencies will also be affected. See
Applications Information section.
__________________________________________Typical Operating Characteristics
(MAX2102 EV kit circuit (Figure 1), V
CC
= 5V, PSGND = open, MOD = GND, f
RFIN
= 2150MHz, P
RFIN
= -19dBm, f
LO
= 2150.125MHz,
P
LO
= -15dBm driven single-ended into LO, AGC set via servo loop for V
IOUT
= V
QOUT
= 0.5Vp-p, IOUT, QOUT drive AC-coupled
100
loads, 2k
from PSOUT to GND, T
A
= +25C, unless otherwise noted.)
120
130
140
150
160
170
180
4.75
4.85
5.00
5.15
5.25
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2102/05-01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= 0C
T
A
= +70C
PSGND = GND
(PRESCALER ENABLED)
T
A
= +25C
-80
-60
-70
-40
-50
-30
-20
-10
0
0.8
1.2
1.4
1.0
1.6
1.8
2.0
2.2
MAX2102
AGC RANGE vs. FREQUENCY
MAX2102/05-02
RFIN FREQUENCY (GHz)
SINGLE-CARRIER POWER FOR 0.5Vp-p
BASEBAND LEVEL (dBm)
T
A
= +70C
T
A
= +25C
T
A
= 0C
T
A
= +70C
T
A
= +25C
T
A
= 0C
AGC = 4V
AGC RANGE
AGC = 1V
-80
-50
-60
-70
-40
-30
-10
-20
0
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
MAX2105
AGC RANGE vs. FREQUENCY
MAX2102/05-01insert
RFIN FREQUENCY (GHz)
SINGLE CARRIER POWER FOR 0.5Vp-p
BASEBAND LEVEL (dBm)
T
A
= 0C
AGC = 1V
AGC = 4V
T
A
= 0C
T
A
= +25C
T
A
= +70C
T
A
= +70C
T
A
= +25C