MICROTUNE MT1230 Rf silicon and subsystems solutions for broadband communications and automotive electronic Datasheet

M
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RF SILICON AND SUBSYSTEMS SOLUTIONS
FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS
MT1230 IF VARIABLE-GAIN
AMPLIFIER
PRODUCT BRIEF
The MT1230 IF variable-gain
amplifier offers low distortion, low
noise, and low power consumption.
APPLICATIONS
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Cable modems
Telephony over cable
CATV set-top boxes
Cable-ready TVs
Digital TVs
FEATURES
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Analog dB linear gain control
characteristic
Temperature-compensated
gain control
57 dB maximum gain
Supply-independent voltage
gain
95 MHz bandwidth
Low distortion
Low noise
Low power consumption
Single +5V supply
8-pin TSSOP package
M I C R O T U N E
MT1230 IF Variable-Gain Amplifier
The Microtune MT1230 is a
low-cost intermediate frequency
(IF) variable-gain amplifier IC for
use in digital cable TV (CATV),
cable modem, internet protocol
(IP) telephony, cable-ready TV,
and digital TV systems.
The MT1230 provides both a
high impedance differential input
and a low impedance differential
output, making it immune to
common mode noise and
minimizing shielding
requirements. Operating from a
single +5V supply, the two-stage
amplifier design typically draws
20 mA. The temperaturecompensated analog control
voltage produces a dB linear gain
characteristic throughout the
entire control voltage range.
The MT1230 is available in an
8-pin TSSOP package.
M T12 30 I F V ARI ABL E GAIN AMPLI FI ER
PRODUCT BRIEF
TERMINAL CONNECTIONS
PIN
FUNCTION/SYMBOL
1
2
3
4
5
6
7
8
VCC
IN1
IN2
VAGC
GND
OUT2
OUT1
GND
DESCRIPTION
Supply
Amplifier input 1
Amplifier input 2
Gain control
Ground
Amplifier output 2
Amplifier output 1
Ground
2 IN1
OUT2 6
3 IN2
OUT1 7
dB Linear and
Temperature Compensation
PARAMETER
Voltage gain, minimum, VAGC = 0.7
Voltage gain, maximum, VAGC = 3.3
AGC range
Gain variation, over 6 MHz
Frequency range
<1 dB rolloff
<3 dB rolloff
Noise figure
AV = 54 dB
MIN
TYP
54
24
MAX
UNIT
30
dB
dB
dB
dB
57
42
0.5
60
95
AV = 30 dB
dB
16
dB
-53
Output IP3, gain adjusted for
VOUT = 51 dBmV, AV > 30 dB
1 dB compression input
Input impedance
Output impedance
MT1230 Typical Application
MHz
MHz
9.5
Output IM3, gain adjusted for
VOUT = 51 dBmV, AV > 30 dB
4 VAGC
AC ELECTRICAL CHARACTERISTICS
dBc
80
dBmV
34
2.2⏐⏐1.7
34
dBmV
kΩ⏐⏐pF
Ω
MT1230
RF Input
Tuner
IF
PARAMETER
MIN
TYP
MAX
UNIT
20
5.5
24
3.3
V
mA
V
kΩ
0.7
60
ABSOLUTE MAXIMUM RATINGS
MAX
8 GND
UNIT
-0.7
5.5
V
Input voltage levels (all inputs), VCM
-0.7
VCC + 0.7
V
+100
°C
+150
°C
+245
°C
Junction temperature
Lead temperature (soldering, 10 seconds)
Top View
VCC 1
MIN
VCC
Storage temperature range
Demodulator
IF
MT1230 Block Diagram
4.5
PARAMETER
IF
AGC
DC ELECTRICAL CHARACTERISITICS
Supply voltage
Supply current
Gain control voltage
VAGC input impedance
SAW
Filter
-55
IN1 2
7 OUT1
IN2 3
6 OUT2
VAGC 4
5 GND
MT1230 Pin Configuration
Microtune, Inc., 2201 Tenth Street, Plano, TX 75074, USA
Tel: +1-972-673-1600, Fax: +1-972-673-1602, E-mail: [email protected], 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; 6,144,402; 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; D,469,742 and additional patents pending or filed.
Entire contents Copyright © 1996 - 2005 Microtune, Inc.
MT1230 PB-00012 — Rev 1.6
072105
AUGUST 2005
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