LA7209V データシートの表示（PDF） - SANYO -> Panasonic
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LA7209V Datasheet PDF : 14 Pages
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Description of Functional Settings
LA7209V
1. ASK modulation driver amplifier: ASK modulates the data and outputs it as an RD signal.
(1) Input settings
Pins 2 and 3 input a 13.56MHz carrier signal (pulse/sine wave) as an inverting/noninverting input pair.
The input dynamic range is 500mVp-p.
I/O Characteristics Sample Data
Input level
Output level
Ra
[mVp-p]
[Vp-p]
[Ω]
Data : high/low
280
7.9/3.9
15
220
6.3/3.3
15
180
4.6/2.5
15
280
7.1/3.3
22
220
5.6/2.9
22
180
4.1/2.3
22
280
6.2/2.9
33
220
4.8/2.5
33
180
3.5/1.5
33
Rb
Rd
Antenna current
IC current
[Ω]
[kΩ]
[mA]
[mA]
Data : high/low
Data : high/low
4.7
1
13.5/6.0
20.9/19.4
4.7
1
10.5/4.8
20.7/19.2
4.7
1
7.8/3.7
20.5/19.0
6.8
1
11.9/4.9
20.9/19.4
6.8
1
9.3/4.0
20.7/19.2
6.8
1
7.0/3.1
20.5/19.0
10
1
10.0/3.9
20.9/19.4
10
1
8.0/3.2
20.7/19.2
10
1
6.0/2.5
20.5/19.0
(2) Setting the degree of modulation
The degree of modulating is set by the ratio of the resistors connected between pins 4 and 5 (Ra) and pins 5 and 6 (Rb).
For types B and C, this is determined by the idling current (Ia) determined by Ra and parallel resistance of Ra + Rb.
The degree of modulation is determined by the idling current (Iab).
(Modulation is performed by switching pin 6 (DATA_SW) on and off.)
For type A, the 100% modulation point is determined by the idling current (Iab) determined by the parallel resistance
of Ra + Rb.
(Modulation is performed by switching pin 4 (TYPE_SW) and pin 6 on and off at the same time.)
Setting the Degree of Modulation
Pin 11
High (Type A)
Low (type B and C)
Pin 4
*1
On
Pin 6
*1 : When type A is selected by setting pin 11 high, SW4 and SW6 operate in a linked manner.
Data high
On
Pin 7
Data low
Off
MOD
CAR
IN+
2
CAR
IN-
3
SW4
TYPE
SW
4
Ia
MOD_E
5
Ib
DATA
SW
6
Ra
Rb
SW6
MOD
DATA
IN
7
TYPE
CTL
11
No.A0641-10/14
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