MICROTUNE MT2121

M
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C
R
O
T
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N E®
MT2121 SINGLE-CHIP
BROADBAND TUNER
PRODUCT BRIEF
The MT2121 has been optimized for
high-performance analog and digital
cable set-top boxes, supporting the
48 MHz to 1 GHz range of the cable
spectrum.
RF SILICON AND SUBSYSTEMS SOLUTIONS
FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS
APPLICATIONS
All cable-based applications
MT2121 Single-Chip Broadband Tuner
ƒ Advanced analog/digital set-top
boxes including OpenCable
ƒ Residential gateways
ƒ Home entertainment servers
FEATURES
•
•
•
•
•
•
•
•
Dual-conversion architecture for
consistent performance with no
manual alignments
Proven performance in dualfunction analog and digital
set-top box designs
Eliminates the need for the 28V
to 33V supplies typically
required by traditional cable
tuners
3.3V and 5V serial bus
compatible
Minimal external components;
simple interface to external
filters
Software shutdown mode
Small 8mm x 8mm 56-lead QFN
Quad Flat package available in
lead-free
Can be used in conjunction with
Microtune’s upstream amplifiers
to create a complete RF front
end for bi-directional
set-top box applications
M I C R O T U N E
The MicroTuner™ MT2121 is a
fully integrated single-chip tuner,
with functional blocks specifically
designed to ease implementation of
an OpenCable™ - compliant set-top
box (STB). The MT2121 contains
integrated filter components and
controls that allow for a simple,
alignment-free pre-select filter. This
provides excellent end-to-end
linearity performance for severely
sloped input conditions. The tuner
also has an on-chip amplifier for
Forward Data Channel (FDC)
applications, reducing bill of
materials (BOM) and improving
performance-versus-solutions based
on a directional coupler.
M T2 1 2 1 SIN G L E- C HIP B R O ADB A ND T UN E R
PRODUCT BRIEF
57
4.75
15
MIX 2 IF output load
impedance
Serial control clock
400
MIX2VCCrf
MIX2INp
MIX2INn
AGCCTRL
46
45
44
43
MIX1OUTn
GND
47
MIX1OUTp
49
48
UPCVCC
MIX2OUTp
V
LBinp
4
39
MIX2OUTn
mV
FDCin
5
38
IFVCC
FDCVcc
6
FDCout
7
LO1tcm1
8
35
VCCLO2
LO1tcm2
9
34
LO2LPF
LO1reg
10
33
GND
VCCLO1
11
32
AFCIN
LO1LPF
12
31
VGAINp
GPO
13
30
VGAINn
A1
14
29
VGACTRL
TYPICAL
IF gain range
0.7V to 3.3V control voltage
30 dB
Image rejection
Undesired 90 MHz higher in
frequency.
-75 dBc
22
23
24
25
26
27
28
DVCCLO2
VGAOUTp
VGAOUTn
VGAVCC
VGAVCC
21
XTALp
SROVCC
20
XTALn
SROOUT
19
30 dB
SerVCC
9 dB
0V to 3.3V control voltage
18
Referred to 75Ω
RF gain range
80 mA
10.6 dB
SerData
Input return loss
3.3V
17
At max RF AGC. Measured at
FGA output. FDC not used.
37
LO2tcm
36
LO2reg
270 mA
SerCLK
Noise figure, max RF
gain, at FGA output
Exposed die attach paddle
on package bottom
15
5.0V
MT2121 Pin Diagram
Mix 2 Output
1kHz
-75 dBc/Hz
10kHz
-85 dBc/Hz
100kHz
-105 dBc/Hz
1st IF Saw
2nd IF Saw
Input Balun
Serial control clock
frequency
Noise figure, max RF
gain and IF gain, at
VGA output
GND
40
Power supply
Phase noise
50
V
3
kHz
CONDITION
UPCVCC
PINSe
LBshp
ELECTRICAL CHARACTERISTICS
PARAMETER
51
PINSh
41
Ω
800
LBinn
42
3.45
Supply voltage ripple
52
1
2
5.25
3.15
LBshn
HBinp
HBshp
MHz
16
Supply voltage, 3.3V
53
MHz
HBshn
1220
30
Supply voltage, 5V
MHz
A0
Second intermediate
center frequency
(programmable)
UNIT
1000
54
First intermediate center
frequency
MAX
HBinn
TYP
48
55
MIN
DVCCLO1
PARAMETER
Input range
56
RECOMMENDED OPERATING CONDITIONS
400 kHz
RFAGC at 3.3V. Measured at
VGA output with FDC
connected.
48-1000 MHz In
Pin Diode
Atten
VGA Output
Selectable Preslector
Filter
10.9 dB
IF Gain Control
RF Gain Control
Pin Diode
Controller
FDC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply voltage
Storage temperature range
Lead temperature
(soldering 4 seconds)
Lead free temperature
(soldering 4 seconds)
Input voltage
PLL
Charge
Pump
Charge
Pump
Die Temp
Sensor
MAX
UNIT
-40
5.25
+150
V
°C
+245
°C
+250
°C
VCC +0.3
V
3-bit
AD
Serial
Bus
OOB
Tuner
MIN
-0.3
PLL
GPO
Loop
Filter
Buffered
Reference
Output
Loop
Filter
MT2121 Block Diagram
Microtune, Inc., 2201 Tenth Street, Plano, TX 75074, USA
Tel: +1-972-673-1600, Fax: +1-972-673-1602, E-mail: sales@microtune.com, Web site: www.microtune.com
For a detailed list of design centers, sales offices, and sales representatives, visit our Web site at www.microtune.com.
The information in this document is believed to be accurate and reliable. Microtune assumes no responsibility for any consequences arising from the use of this information, nor from any infringement of patents or
the rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or other rights of Microtune. The information in this publication replaces and supersedes
all information previously supplied, and is subject to change without notice. The customer is responsible for assuring that proper design and operating safeguards are observed to minimize inherent and procedural
hazards. Microtune assumes no responsibility for applications assistance or customer product design.
The devices described in this document are not authorized for use in medical, life-support equipment, or any other application involving a potential risk of severe property or environmental damage, personal
injury, or death without prior express written approval of Microtune. Any such use is understood to be entirely at the user’s risk.
Microtune is a registered trademark of Microtune, Inc. MicroTuner, MicroStreamer, VideoCaster, DataCaster, and the Microtune logo are trademarks of Microtune, Inc. All other trademarks belong to their respective
companies.
Microtune’s products are protected by one or more of the following U.S. patents: 5,625,325; 5,648,744; 5,717,730; 5,737,035; 5,739,730; 5,805,988; 5,847,612; 6,100,761; 6,104,242; 6,163,684; 6,169,569;
6,172,378; 6,177,964; 6,211,745; 6,218,899; 6,268,778; 6,310,387; 6,323,736; 6,355,537; 6,429,502; 6,462,327; 6,535,068; 6,580,313; 6,608,522; 6,631,257; 6,714,776; 6,725,463; 6,744,308 B1; 6,771,124;
6,784,945; 6,804,099; 6,888,406; 6,891,435; 6,906,594; 6,909,886; 6,920,182; 6,963,478; D,469,742 and additional patents pending or filed.
Entire contents Copyright © 1996 - 2005 Microtune, Inc.
MT2121 PB-00067 — Rev 1.2
110805
DECEMBER 2005
AFC In/Temp
Out