|
Basic Information
Question 1
What is the difference between the HT6P20X2T3 and HT6P20x2 ?
Answer
The HT6P20X2T3, does not require an external resistor to adjust the bit width and also contains an integrated RF transmitter, which reduces the need for an external power transistor and SAW resonator.
Functional Description
Question 1
What is the advantage of the HT6P20X2T3 compared to the traditional SAW resonator and transistor?
Answer
In addition to the integrated transistor and filter circuits in the device, the HT6P20X2T3, when compared with a traditional SAW resonator, provides more frequency options (300MHz~450MHz) and enhanced operating temperature range.
Application Description
Question 1
What is the batter life if using a CR2032 (3V 170mAh) to transmit for 10 times a day?
Answer
According to calculations using the HT6P20X2T3 which requires 12.5mA to transmit a one by, 3mA to transmit a zero and 2μA when powered-down, the average transmission power consumption is about (12.5+3)/2 = 7.75mA. Taking one sec as a unit, then a transmission 10 times a day requires 77.5mA sec. When added to the power-down time of 86400 seconds, then the device requires 172.8 mA sec per day. This is about 250.3mA sec=0.07mAh. Therefore, one CR2032 battery may be used for 170/0.07= 2428.6 days, which is approximately 6.7 years
Question 2
What special points should be noted when used in remote applications with a range of over 100 meters?
Answer
In considering the HT6P20X2T3 operating at 3.5V with a power output of 9dBm as an example, the remote distance can reach more than 100 meters. However if this available power is not entirely radiated, the effective distance may be quite short. Therefore, for such products, antenna matching, antenna length, high sensitivity at the receiving end and good identification of the decoding program should be all considered. The remote control distance depends after all on the entire system and not just on the transmitter.
|
