The MAX19997A dual-channel down-conversion mixer is a general-purpose, highly integrated, and versatile down-converter that provides high linearity performance and low noise figure for 1800MHz to 2900MHz base station applications. The MAX19997A fully supports the low-end and high-end LO injection architectures in WiMAX â„¢, LTE, WCS, and MMDS wireless infrastructure applications from 2300MHz to 2900MHz. The low-end configuration provides 8.7dB gain, + 24dBm input IP3, and 10.3dB NF. It can provide 8.7dB gain, + 24dBm input IP3 and 10.4dB NF. An additional tuning element (bypass inductor) is added to each RF port to further extend the range of high-end LO injection architecture down to 1800MHz.
The device integrates an unbalanced transformer at the RF and LO ports. In addition, the device includes an LO buffer, two double balanced mixers, and a pair of differential IF output amplifiers. The MAX19997A requires a LO drive with a typical value of 0dBm, and the power supply current is guaranteed to be less than 420mA to achieve the expected linearity index.
The MAX19997A is available in a compact 6mm x 6mm, 36-pin, thin QFN lead-free package with exposed pad. In the extended temperature range of TC = -40 ° C to + 85 ° C, electrical performance is guaranteed.
Key features
1800MHz to 2900MHz RF frequency range
1950MHz to 3400MHz LO frequency range
50MHz to 500MHz IF frequency range
Support low-end and high-end LO injection
8.7dB conversion gain
+ 24dBm input IP3
10.3dB noise figure
+ 11.3dBm input 1dB compression point
2 x 2 spurious suppression at 70dBc (typical) at PRF = -10dBm
Dual channels are ideal for diversity receiver applications
Integrated LO buffer
Internal LO and RF baluns support single-ended input
-3dBm to + 3dBm low LO drive
Pin compatible with MAX19999 3000MHz to 4000MHz mixer
Pins are similar to MAX9995 / MAX9995A and MAX19995 / MAX19995A 1700MHz to 2200MHz mixers and MAX9985 / MAX9985A and MAX19985 / MAX19985A 700MHz to 1000MHz mixers
42dB channel-to-channel isolation
Use + 5.0V or + 3.3V single power supply
External current setting resistor allows compromise selection of mixer's low power / low performance operating mode
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Drum type Rice Cooker
Features
This type rice cooker is famous with drum type appearance, which is easy operation and easy clean.
There are two type of inner pot , one type called white pot which is without non-stick but cheaper price .another one called non-stick pot is polished with emery, Also there are two type non-stick with different price ,it`s depending on different demands to use.
And the inner pot cannot be burned on the stove, which will make the pot transfigured and bad contact with the heating plate. While cooking , the heating plate or the fuse is most likely to be burned for the bad contact of the inner pot and the heating plate, Besides, make sure to dry the pot before putting into the outer shell of the rice cooker ,or else the drops of water flowing on the heating plate, will make the heating plate rusted.
Applications
Many peoples are used drum type rice cooker for congee and soup, some of peoples are prefer to use this type rice cooker for steaming.
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