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參數(shù)資料
| 型號： | MAX2450CEP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 衰減器 |
| 英文描述： | 3V, Ultra-Low-Power Quadrature Modulator/Demodulator |
| 中文描述： | 70 MHz - 160 MHz RF/MICROWAVE QUADRAPHASE MODEM |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 107K |
| 代理商： | MAX2450CEP |
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.
General Desc ription
The MAX2450 combines a quadrature modulator and
quadrature demodulator with a supporting oscillator and
divide-by-8 prescaler on a monolithic IC. It operates
from a single +3V supply and draws only 5.9mA. The
demodulator accepts an amplified and filtered IF signal
in the 35MHz to 80MHz range, and demodulates it into I
and Q baseband signals with 51dB of voltage conver-
sion gain. The IF input is terminated with a 400
thin-
film resistor for matching to an external IF filter. The
baseband outputs are fully differential and have 1.2Vp-p
signal swings. The modulator accepts differential I and
Q baseband signals with amplitudes up to 1.35Vp-p
and bandwidths to 15MHz, and produces a differential
IF signal in the 35MHz to 80MHz range.
Pulling the CMOS-compatible ENABLE pin low shuts
down the MAX2450 and reduces the supply current to
less than 1μA. To minimize spurious feedback, the
MAX2450’s internal oscillator is set at twice the IF via
external tuning components. The oscillator and associ-
ated phase shifters produce differential signals exhibit-
ing low amplitude and phase imbalance, yielding
modulator sideband rejection of 38dB. The MAX2450
comes in a QSOP package.
Applic ations
Digital Cordless Phones
GSM and North American Cellular Phones
Wireless LANs
Digital Communications
Two-Way Pagers
____________________________Features
o
Combines Quadrature Modulator and
Demodulator
o
Integrated Quadrature Phase Shifters
o
On-Chip Oscillator (Requires External Tuning
Circuit)
o
On-Chip Divide-by-8 Prescaler
o
Modulator Input Bandwidth Up to 15MHz
o
Demodulator Output Bandwidth Up to 9MHz
o
51dB Demodulator Voltage Conversion Gain
o
CMOS-Compatible Enable
o
5.9mA Operating Supply Current
1μA Shutdown Supply Current
M
3V, Ultra-Low-Power Quadrature
Modulator/Demodulator
________________________________________________________________ Maxim Integrated Products
1
ENABLE
GND
400
2IF_OUT
1
8
3, 19
9PRE_OUT
14Q_OUT
15Q_OUT
16I_OUT
17I _OUT
20
IF_IN
10
LO_V
CC
11
TANK
12
TANK
4
5
I_IN
I_IN
6
7
Q_IN
Q_IN
V
CC
18
13
LO_GND
BIAS
PRESCALER
MODULATOR
DEMODULATOR
QUADRATURE
PHASE
GENERATOR
÷
2
LOCAL
OSCILLATOR
÷
2
÷
4
BANDGAP
BIAS
MASTER BIAS
Σ
0°
90°
MAX2450
Func tional Diagram
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
IF_IN
GND
V
CC
I_OUT
I_OUT
Q_OUT
Q_OUT
LO_GND
TANK
TANK
IF_OUT
IF_OUT
GND
I_IN
I_IN
Q_IN
Q_IN
ENABLE
PRE_OUT
LO_V
CC
TOP VIEW
12
11
9
10
QSOP
MAX2450
Pin Configuration
19-0455; Rev 1; 9/98
PART
MAX2450CEP
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
20 QSOP
EVALUATION KIT
AVAILABLE
Ordering Information
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX2450CEP+ | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2450CEP+T | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2450CEP-T | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2450CEP-W | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2450CWP | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
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