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参数资料
| 型号： | MAX2023ETX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/18页 |
| 文件大小： | 0K |
| 描述： | IC MOD/DEMOD HI DYN RNG 36-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 调制器/解调器 |
| 频率： | 1.5GHz ~ 2.3GHz |
| RF 型： | CDMA，EDGE，GSM，TDMA |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
High-Dynamic-Range, Direct Up-/Downconversion
1500MHz to 2500MHz Quadrature Mod/Demod
downconverter is optimized for high linearity and excel-
lent noise performance, typically with a +38dBm IIP3,
an input P1dB of +29.7dBm, and a 9.6dB noise figure.
A wide I/Q port bandwidth allows the port to be used as
an image-reject mixer for downconversion to a quadra-
ture IF frequency.
The RF and LO inputs are internally matched to 50 Ω .
Thus, no matching components are required, and only
DC-blocking capacitors are needed for interfacing.
Demodulator Output Port Considerations
Much like in the modulator case, the four baseband
ports require some form of DC return to establish a
common mode that the on-chip circuitry drives. This
can be achieved by directly DC-coupling to the base-
band ports (staying within the ±3.5V common-mode
range), through an inductor to ground, or through a
low-value resistor to ground. Figure 6 shows a typical
network that would be used to connect to each base-
band port for demodulator operation. This network pro-
vides a common-mode DC return, implements a
high-frequency diplexer to terminate unwanted RF
terms, and also provides an impedance transformation
to a possible higher impedance baseband amplifier.
The network C a , R a , L a , and C b form a highpass/lowpass
network to terminate the high frequencies into a load
while passing the desired lower IF frequencies. Elements
L a , C b , L b , C c , L c , and C d provide a possible imped-
ance transformer. Depending on the impedance being
transformed and the desired bandwidth, a fewer number
of elements could be used. It is suggested that L a and
C b always be used since they are part of the high-fre-
quency diplexer. If power matching is not a concern,
then this would reduce the elements to just the diplexer.
I+
3dB PAD
DC BLOCK
0°
MINI-CIRCUITS
ZFSCJ-2-1
I-
3dB PAD
DC BLOCK
180°
3dB PADS LOOK LIKE 160 I TO GROUND
AND PROVIDES THE COMMON-MODE
DC RETURN FOR THE ON-CHIP CIRCUITRY.
MINI-CIRCUITS
ZFSC-2-1W-S+
0° COMBINER
Q+
Q-
3dB PAD
3dB PAD
DC BLOCK
DC BLOCK
0°
MINI-CIRCUITS
ZFSCJ-2-1
180°
90°
Figure 5. Demodulator Combining Diagram
L d
R a
C a
MAX2023
I/Q OUTPUTS
L a
C b
L b
C c
L c
R b
C d
C e
EXTERNAL
STAGE
Figure 6. Baseband Port Typical Filtering and DC Return Network
14
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相关代理商/技术参数 |
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| MAX2023EVKIT | 功能描述:调节器/解调器 Hi-Dynamic-Range Direct Upconversion 1500MHz - 2300MHz Quadrature Mod/Dem RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| MAX2023EVKIT+ | 功能描述:调节器/解调器 MAX2023 Evaluation Kit RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| MAX20-24.0C | 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE |
| MAX20-24.0CA | 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE |
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