19-1256; Rev 2; 10/98
NUAL
KIT MA
ATION
ET
EVALU
TA SHE
WS DA
FOLLO
Direct-Conversion Tuner ICs for
Digital DBS Applications
____________________________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
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).
MAX2102/MAX2105
________________________Applications
DBS Tuners
DVB-Compliant DBS Tuners
Cellular Base Stations
Wireless Local Loop
Broadband Systems
LMDS
PART
MAX2102CWI
MAX2105CWI
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
28 SO
28 SO
Functional Diagram
V
CC
14
QOUT
13
GND
12
GND
11
AGC
10
GND
9
RFIN
8
RFIN
7
V
CC
6
GND
5
V
CC
4
GND
3
IOUT
2
V
CC
1
Q
I
MAX2102
MAX2105
OFFSET CORRECTION
15
QDC
16
QDC
17
IDC
18
IDC
19
GND
20
90°
0°
/64, /65
21
LO
22
LO
23
V
CC
24
GND
25
PSGND
26
PSOUT
27
MOD
28
V
CC
V
CC
†
Patents pending
*Contact
factory for MAX2102/MAX2105 versions with expanded frequency range.
________________________________________________________________
Maxim Integrated Products
1
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.
Direct-Conversion Tuner ICs for
Digital DBS Applications
MAX2102/MAX2105
ABSOLUTE MAXIMUM RATINGS
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
= +70°C)
SO (derate 12.5mW/°C above +70°C) ..........................1.025W
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
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.
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
= 0°C to +70°C; unless otherwise noted.)
PARAMETER
SUPPLY
Operating Supply Voltage Range
Quiescent Supply Current
CONTROL INPUTS, PRESCALER
MOD Input Low Level
MOD Input High Level
MOD Input Bias Current
AGC Input Bias Current
AGC Input Bias Current
IOUT, QOUT Common-Mode Voltage
0V
≤
V
MOD
≤
V
CC
MAX2102
MAX2105
0.5V
≤
V
AGC
≤
4V
1V
≤
V
AGC
≤
4V
2.0
-80
-250
-180
2.2
10
180
180
2.6
0.8
V
V
µA
µA
V
4.75
150
5.25
195
V
mA
CONDITIONS
MIN
TYP
MAX
UNITS
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 100Ω loads; 2kΩ from PSOUT to GND; T
A
= +25°C; unless otherwise noted.)
PARAMETER
RF FRONT END
RFIN Carrier Frequency Range
RFIN Maximum Single-Carrier
Input Power
(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)
Refers to single-carrier power generating
V
IOUT
= V
QOUT
= 0.5Vp-p,
950MHz < f
RFIN
< 2150MHz,
950MHz < f
LO
< 2150MHz (Note 2)
0.5V
≤
V
AGC
≤
4V
1V
≤
V
AGC
≤
4V
MAX2102
MAX2105
MAX2102
MAX2105
50
41
950
2150
MHz
CONDITIONS
MIN
TYP
MAX
UNITS
-19
dBm
RFIN Minimum Single-Carrier
Input Power
-69
dBm
-60
dB
AGC Range
2
_______________________________________________________________________________________
Direct-Conversion Tuner ICs for
Digital DBS Applications
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 100Ω loads; 2kΩ from PSOUT to GND; T
A
= +25°C; unless otherwise noted.)
PARAMETER
CONDITIONS
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
P
RFIN
= -69dBm
P
RFIN
= -60dBm
P
RFIN
= -69dBm
Noise Figure
P
RFIN
= -60dBm
f
RFIN
= 2141MHz,
f
LO
= 2151MHz
MAX2102
MAX2105
MAX2102
MAX2105
MIN
TYP
MAX
UNITS
MAX2102/MAX2105
RFIN Input Third-Order Intercept
6.5
dBm
RFIN Input Second-Order Intercept
15.1
dBm
13.2
15.7
12.9
15.5
11.2
11.5
-0.5
dB/dB
-0.7
2.3:1
dB
AGC = 4V,
MAX2102
P
RFIN
set via servo
loop for V
IOUT
=
MAX2105
V
QOUT
= 0.5Vp-p
MAX2102
MAX2105
Defined as
∆NF/∆Gain;
for AGC range,
Maximum Noise-Figure Variation with defined as single-carrier power range
AGC Gain Setting
of -69dBm to -59dBm (MAX2102) or
-60dBm to -50dBm (MAX2105)
RFIN Worst-Case VSWR across
Band
f
RFIN
= 950MHz to 2150MHz, 50Ω source
Maximum Power of Spurious
Downconversion Products
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)
-32.3
dBc
-49
dBm
-54
LO Leakage at RFIN
P
LO
= -15dBm, P
LO
= -15dBm (differentially driven),
950MHz < f
LO
< 2150MHz (Note 3)
_______________________________________________________________________________________
3
Direct-Conversion Tuner ICs for
Digital DBS Applications
MAX2102/MAX2105
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 100Ω loads; 2kΩ from PSOUT to GND; T
A
= +25°C; unless otherwise noted.)
PARAMETER
LO Input Frequency Range
LO Input Worst-Case VSWR over
Band
(Note 1)
f
LO
= 950MHz to 2150MHz, 50Ω source into
MAX2102 EV kit match circuit
(Note 4)
LO Input Power Level
RFIN to LO Input Isolation
IOUT, QOUT Phase Imbalance
Worst-Case Additional Phase
Imbalance Over Temperature
IOUT, QOUT Amplitude Imbalance
Refers to power level driven into LO,
LO
(differentially driven) (Notes 2, 4)
(Notes 2, 5)
950MHz < f
RFIN
< 2150MHz;
950MHz < f
LO
< 2150MHz; P
RFIN
= -40dBm;
f
IOUT
, f
QOUT
= 125kHz (Note 2)
T
A
= +25°C to +70°C (Notes 2 and 6)
T
A
= +25°C to +0°C (Note 2)
950MHz < f
RFIN
< 2150MHz;
950MHz < f
LO
< 2150MHz; P
RFIN
= -40dBm;
f
IOUT
, f
QOUT
= 125kHz (Note 2)
T
A
= 0°C to +70°C
(Note 2)
2kΩ || 10pF load
PSOUT load = 2kΩ || 5pF (Note 3)
P
RFIN
= -50dBm; AGC = 4V, V
CC
= 5.0V
At -3dB attenuation
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)
MOD = low
MOD = high
64
65
0.8
35
2.7
94
0.45
0.85
65
-0.1
-0.07
-15
-15
28
3
0.6
1
0.5
64
65
Vp-p
%
Vp-p
MHz
dB
dB
degrees
CONDITIONS
MIN
950
1.75:1
-5
dBm
TYP
MAX
2150
UNITS
MHz
OSCILLATOR BUFFER, QUADRATURE GENERATOR, PRESCALER
degrees
dB
Prescaler Divide Ratio
Prescaler Output Swing at PSOUT
Prescaler Duty Cycle at PSOUT
BASEBAND AC CHARACTERISTICS
IOUT, QOUT Clipping Level
Baseband Bandwidth
(at IOUT, QOUT)
Baseband Gain Ripple
(at IOUT, QOUT)
Baseband Group Delay Ripple
(at IOUT, QOUT)
0.45
ns
4
_______________________________________________________________________________________
Direct-Conversion Tuner ICs for
Digital DBS Applications
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 100Ω loads; 2kΩ from PSOUT to GND; T
A
= +25°C; unless otherwise noted.)
PARAMETER
IOUT, QOUT Output Impedance
Maximum IOUT to QOUT Output
Impedance Difference
Power-Supply Ripple Rejection
(measured at IOUT, QOUT)
(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
MIN
TYP
4.7
±1
MAX
10
UNITS
Ω
Ω
MAX2102/MAX2105
32
dB
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 0.22µF 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
100Ω loads, 2kΩ from PSOUT to GND, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2102/05-01
MAX2102
AGC RANGE vs. FREQUENCY
SINGLE-CARRIER POWER FOR 0.5Vp-p
BASEBAND LEVEL (dBm)
SINGLE CARRIER POWER FOR 0.5Vp-p
BASEBAND LEVEL (dBm)
-10
-20
-30
-40
-50
-60
-70
-80
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
RFIN FREQUENCY (GHz)
T
A
= +70°C
T
A
= +25°C
T
A
= 0°C
AGC = 4V
MAX2102/05-02
MAX2105
AGC RANGE vs. FREQUENCY
-10
-20
-30
-40
-50
-60
AGC = 4V
-70
-80
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
RFIN FREQUENCY (GHz)
T
A
= 0°C
T
A
= +25°C
T
A
= +70°C
T
A
= 0°C
AGC = 1V
T
A
= +25°C
T
A
= +70°C
MAX2102/05-01insert
180
170
SUPPLY CURRENT (mA)
160
150
140
130
120
4.75
4.85
5.00
5.15
T
A
= +25°C
PSGND = GND
(PRESCALER ENABLED)
T
A
= +70°C
0
AGC = 1V
T
A
= +70°C
T
A
= +25°C
T
A
= 0°C
AGC RANGE
0
T
A
= 0°C
5.25
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
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