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參數(shù)資料
| 型號： | LA7209V |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Monolithic Linear IC ISO/IEC-14443 (proximity) RF amplifier for contact-less IC card and tag |
| 中文描述： | 單片線性集成電路ISO/IEC-14443（接近）射頻放大器，接觸式IC卡和標(biāo)簽 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 168K |
| 代理商： | LA7209V |
LA7209V
No.A0641-12/14
3. Comparator: Used to provide 0V/5V pulse output of the demodulated data.
(1) Setting the input level
Signals from 10mVp-p to 2Vpp can be handled by using capacitor coupling to input the signal to pin 16.
(2) Setting the output load resistance
The load resistance is set so that the pin 15 current capacity is 2.2mA to 5mA.
Note that this will be the range 2.2 k
Ω
to 1 k
Ω
when VCC = 5 V.
4. Variable threshold TAG detector: Detects tags in the communications area
(1) Setting the input level
The input level is determined by the resistor (Rg) connected between pin 19 and ground. Note however, that since the
output level can also be modified at the same time by pins 17 and 18, the adjustment described in step (2) of the
following item is required.
(2) Setting the detection threshold level
The built-in detector's threshold level can be changed by pin 14, and is set so that it can identify whether or not a TAG
is present.
* : The level goes to 500mV if the pin is left open.
(3) Setting the detection (smoothing) capacitor
The built-in detector's sensitivity is adjusted with pin 9. (Minimum capacitance : 10pF)
(4) Setting the output load resistance
Set the load resistance so that the pin 10 pull-in current is in the range 0.2mA to 0.5mA.
Note that this will be the range 10k
Ω
to 24k
Ω
when VCC = 5 V.
5. Type switching: For IC card type switching
Low (0V to 1V) : Type B/C read/write communication is possible
High (2V to VCC) : Type A read/write communication is possible
6. Power save mode (muting) switching: Used for low-power mode control and driver amplifier output muting
Low (0V to 1V) : Normal operation
Read/write communication is possible
High (2V to VCC) : Power saving mode
Read/write communication is not possible
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