SANYO LA7209V

Ordering number : ENA0641
Monolithic Linear IC
ISO/IEC-14443 (proximity) RF amplifier
for contact-less IC card and tag
LA7209V
Overview
The LA7209V is a ISO/IEC-14443 (proximity) RF amplifier for contact-less IC card and tag.
Features
• Driver amplifier for ASK modulation (under 500mW) :
Modulation and output level be able to changing by out side constant.
• Diode detector (bridge connecting) : Abstract the data by envelope detector.
• Band pass filter (10kHz to 1MHz) : Data frequency bandwidth pass filter.
• Variable gain amplifier + fixed gain amplifier :
Choosing the wide range output level by additional fixed gain amplifier.
• Comparator (10mVp-p to 2Vp-p) : Converting to the pulse signal of 0/5 volts from small signal.
• Regulator (2V) : Can be use the VCC = 2.7V to 6.0V (recommend VCC : 3V ±10% or 5V ±10%)
• Type changeover switch (card type A/B, C) : All smart card and RF-tag can be read and write by TYPE_CTL.
• Power save (mute) changeover switch : Power save (= 650μA) and output mute can be setting by PWR_CTL.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Symbol
Conditions
VCC max
Pd max
Ta ≤ 75°C *
Ratings
Unit
9.0
V
600
mW
Operating temperature
Topr
-20 to +75
°C
Storage temperature
Tstg
-40 to +125
°C
∗ When mounted on a 114.3mm×76.1mm×1.6mm, glass epoxy board.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
30707 MS PC B8-7269 No.A0641-1/14
LA7209V
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended operating voltage
VCC
Allowable operating voltage range
VCC op
Conditions
Ratings
Unit
5.0
V
2.7 to 6.0
V
Electrical Characteristics at Ta = 25°C, VCC = 5V
Parameter
Symbol
IN
OUT
Ratings
Conditions
min
Consumption current 1
ICC1
T2A
VIN = 3.0Vp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure the flowing current at pin 20.
T3A
typ
Unit
max
15
20
25
mA
7
9.5
12
mA
0.5
0.65
0.8
mA
0
0.1
0.2
mA
9
12
15
Vp-p
1.2
2.5
3.8
Vp-p
70
85
100
%
70
85
100
%
-60
-40
-34
dB
90
100
110
%
25
30
35
%
-43
-39
dBV
1.7
5.0
V
0.0
1.3
V
T7 : 3.0V, SW1 : 2, SW2 : Open, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
Consumption current 2
ICC2
T2A
VIN = 3.0Vp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure the flowing current at pin 22 & 23.
T3A
T7 : 3.0V, SW1 : 2, SW2 : Open, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
Consumption current 1
ICC1S
in power save
T2A
VIN = 3.0Vp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure the flowing current at pin 20 in
T3A
P.S.
T7 : 3.0V, SW1 : 2, SW2 : Open, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
Consumption current 2
ICC2S
in power save
T2A
VIN = 3.0Vp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure the flowing current at pin 22 & 23
T3A
in P.S.
T7 : 3.0V, SW1 : 2, SW2 : Open, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
MOD output level 1
VMOD1
T2A
T22
T3A
T23
VIN = 3.0Vp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure the amplitude of output waveform.
T7 : 3.0V, SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
MOD output level 2
VMOD2
T2A
T22
T3A
T23
VIN = 750mVp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure the amplitude of output waveform.
T7 : 3.0V, SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
MOD output level 3
VMOD3
T2A
T22
T3A
T23
VIN = 750mVp-p, 13.2MHz, Square wave (T2A/T3A :
Opposite) The ratio of VMOD2.
T7 : 3.0V, SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
MOD output level 4
VMOD4
T2A
T22
T3A
T23
VIN = 750mVp-p, 13.8MHz, Square wave (T2A/T3A :
Opposite) The ratio of VMOD2.
T7 : 3.0V, SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
MOD 2nd harmonic
THD2
distortion
T2A
T22
T3A
T23
VIN = 750mVp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure 2nd harmonic distortion of output
waveform.
T7 : 3.0V, SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2,
SW5 : 2, SW6 : 2
Modulation type A
MODA
T2A
T22
T3A
T23
T7
VIN = 3.0Vp-p, 106kHz, Square wave (T7)
VIN = 750mVp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure modulation of output waveform.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2, SW5 : 2, SW6 : 2
Modulation type B
MODB
T2A
T22
T3A
T23
VIN = 3.0Vp-p, 106kHz, Square wave (T7)
VIN = 750mVp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite) Measure modulation of output waveform.
T7
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2, SW5 : 2, SW6 : 2
Modulator output noise
NMOD
T7
level
T22
DC_3V are impressed to T7 and an output noise is
T23
measured.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 2, SW5 : 2, SW6 : 2
MOD DATA input
VDATH
T7
T6
voltage “High“
MOD DATA input
voltage “Low“
DC voltage that T6 sinks.
SW1 : 2, SW2 : 2, SW3 : 3, SW4 : 2, SW5 : 2, SW6 : 2
VDATL
T7
T6
DC voltage that T6 opens.
SW1 : 2, SW2 : 2, SW3 : 3, SW4 : 2, SW5 : 2, SW6 : 2
Continued on next page.
No.A0641-2/14
LA7209V
Continued from preceding page.
Parameter
Symbol
IN
OUT
Ratings
Conditions
min
DET demodulation
DETA
sensitivity type A
T22
T18
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (847kHz)
Measure the C/N ratio of the 847kHz component.
typ
Unit
max
42
45
48
dB
47
50
53
dB
45
48
51
dB
2.5
3.0
3.1
Vp-p
0
0.2
0.4
V
24
30
14
16
18
dB
2.5
3.0
3.1
Vp-p
0
0.2
0.4
V
0.0
1.3
V
1.7
5.0
V
1.7
5.0
V
0.0
1.3
V
SW1 : 1, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 1, SW6 : 2
DET demodulation
DETC
sensitivity type C
T22
T18
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (106kHz)
Measure the C/N ratio of the 106kHz component.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 1, SW6 : 2
DET demodulation
DT423
sensitivity 423k
T22
T18
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (423kHz)
Measure the C/N ratio of the 423kHz component.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 1, SW6 : 2
Comparator sensitivity
SCMP
T16A
T15
Comparator output
VCMPL
T2A
T15
VIN = 10mVp-p, 106kHz, Square wave
Measure the amplitude of output waveform.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 2, SW6 : 2
“Low“
T3A
T7
VIN = 3.0Vp-p, 106kHz, Square wave (T7)
VIN = 3.0Vp-p, 13.5MHz, Square wave (T2A/T3A :
Opposite)
Measure the bottom of DC of output waveform.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 2, SW6 : 2
EVR characteristics 1
GEVR1
T22
T18
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (847kHz)
Measure the output level at Pin 18, Calculate
dB
output/input ratio.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 1, SW6 : 2
EVR characteristics 2
GEVR2
T22
T18
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (847kHz)
Measure the output level at Pin 18,
Calculate GEVR1 minus output level.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 2, SW6 : 2
TAG DET output
VTAG
T22
T10
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (847kHz)
Measure the output level at Pin 18.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 1, SW6 : 2
TAG DET output “Low“
VTAGL
T22
T10
T23
VIN = 5.0Vp-p (13.5MHz)+28mVp-p (847kHz)
Measure the DC bottom level of output wave at Pin 18.
SW1 : 2, SW2 : 2, SW3 : 2, SW4 : 1, SW5 : 1, SW6 : 2
Type Switch ON voltage
TYPON
T11
T4
DC voltage that T4 sinks.
SW1 : Open, SW2 : 2, SW3 : 3, SW4 : 2, SW5 : 2,
SW6 : 2
Type Switch OFF
TYPOF
T11
T4
voltage
DC voltage that T4 opens.
SW1 : Open, SW2 : 2, SW3 : 3, SW4 : 2, SW5 : 2,
SW6 : 2
Power save ON voltage
PSON
T12
T20
DC voltage that DC current 1mA or less flows into T20.
SW1 : 2, SW2 : Open, SW3 : 3, SW4 : 2, SW5 : 2,
SW6 : 2
Power save OFF voltage
PSOFF
T12
T20
DC voltage that DC current 10mA or more flows into
T20.
SW1 : 2, SW2 : Open, SW3 : 3, SW4 : 2, SW5 : 2,
SW6 : 2
No.A0641-3/14
LA7209V
Package Dimensions
unit : mm (typ)
3175C
7.8
24
0.5
5.6
7.6
13
12
1
0.15
0.65
(0.33)
1.5max
0.1
(1.3)
0.22
SANYO : SSOP24(275mil)
Block Diagram
T22 T21 T20
10μH
Dummy
Antenna
15pF
24
DET
IN-
T16A
VCC1
5V
T19
3.9kΩ
23
22
21
MOD
MOD
DET
OUTOUT+
IN+
20
VCC
T17
1
19
EVR
CTL
1.8kΩ
1
SW4
18
EVR
OUT
GAIN
10~30dB
LPF
VCC3
VCC3
3V T15 3V T15
T16
2
SW5
+ 10μF 0.1μF
10pF
T18
10kΩ
VCC2
5V
1μH 1μH
100kΩ
T24 T23
2 0.1μF
17
AMP
OUT
16
15
14
COMP TAG
COMP
IN
OUT
REF
13
GND
COMP
AMP
EVR
100Ω
GAIN
30dB
TAG
DET
MOD
ON:TYPE-B/C
REG
CAR
IN+
GND
1
TYPE
SW
CAR
IN-
2
3
2.7kΩ
DATA
MOD_E SW
4
5
6
SW6
2 10Ω 33Ω 2
MOD
DATA
IN
7
T3A
10kΩ
240Ω
240Ω
T2A
T4
100pF
1μF
REG
8
9
100pF
10kΩ
SW3
T5 T6
VCC3
3V
TAG
DET
+
1
T2 T3
COMP
T7 T8
VCC3
3V
T9
PWR
TAG TYPE
SAVE
CTL
OUT CTL
10
11
12
VCC1
VCC3
VCC1
5V
3V
5V
10kΩ
T10
A
1
SW1
B/C 2
T11
1 PWR_SAVE
SW2
2 NOR_OPRT
T12
* Dummy antenna : TDK inductor EL0405
Specifications : L = 1μH ±1%, Q = 50 (at f = 7.96MHz), DC resistance = 0.22Ω (maximum)
No.A0641-4/14
LA7209V
Pin Functions
Pin No.
Pin Name
1
GND
2
CAR_IN+
DC voltage
0V
Signal wave form
Equivalent Circuit
SQUARE-WAVE : 13.5MHz
Pin 2
600μA
0.1Vp-p
300Ω
3
CAR_IN-
0V
SQUARE-WAVE : 13.5MHz
Pin 3
600μA
0.1Vp-p
300Ω
4
TYPE_SW
0V
DC
Pin 4
500Ω
50kΩ
5
MOD_E
1V
DC
Pin 22
Pin 23
Pin 5
6
DATA_SW
0V
DC
Pin 6
500Ω
50kΩ
Continued on next page.
No.A0641-5/14
LA7209V
Continued from preceding page.
Pin No.
Pin Name
7
MOD_DATA_IN
DC voltage
0V
Signal wave form
Equivalent Circuit
SQUARE-WAVE
1.8V~VCC
120μA
50kΩ
50kΩ
Pin 7
GND
8
REG
2V
DC
1kΩ
1kΩ
10pF
330Ω
7kΩ
2kΩ
Pin 8
10.7kΩ 10.7kΩ
12kΩ
13kΩ
10kΩ
620Ω
9
TAG_DET
Pin 9
300Ω
5kΩ
50kΩ
10
TAG_OUT
5V
DC
Pin 10
25μA
11
TYPE_CTL
0V to 1.2V : TYPE_B/C
Pin 11
1.8V to VCC : TYPE_A
90μA
300Ω
50kΩ
1.0V
12
PWR_SAVE_
0V to 1.2V : Normal
CTL
1.8V to VCC : Power_Save
Pin 12
130μA
1.0V
13
100kΩ
300Ω
GND
Continued on next page.
No.A0641-6/14
LA7209V
Continued from preceding page.
Pin No.
14
Pin Name
TAG_REF
DC voltage
0.5V
Signal wave form
Equivalent Circuit
DC
Pin 14
50μA
VREG
300Ω
30kΩ
10kΩ
15
COMP_OUT
1.6V
SQUARE-WAVE
Pin 15
VCC
100μA
GND
16
COMP_IN
1.2V
SQUARE-WAVE
Pin 16
1.6V
0.8V
17
AMP_OUT
4V
50μA
500Ω
500Ω
10kΩ
10kΩ
2.0V
250μA
SQUARE-WAVE
Pin 17
4.4V
160μA
500Ω
3.6V
18
EVR_OUT
4V
50μA
SQUARE-WAVE
Pin 18
4.4V
5kΩ
300Ω
3.6V
50μA
Continued on next page.
No.A0641-7/14
LA7209V
Continued from preceding page.
Pin No.
19
Pin Name
EVR_CTL
DC voltage
1.4V
Signal wave form
Equivalent Circuit
DC
200Ω
250Ω
200Ω
200Ω
200Ω
1kΩ
50μA
1.4V
1pF
Pin 19
20
VCC
5V
DC
21
DET_IN+
DET_IN-
2V
ASK-WAVE : 13.5MHz
24
Pin 21
Pin 24
50μA
10kΩ
3kΩ 3kΩ
4.7kΩ
4Vp-p
20pF 20pF
3kΩ 3kΩ
4.7kΩ
20pF 20pF
1.3V
22
23
MOD_OUT+
MOD_OUT-
5V
ASK-WAVE : 13.5MHz
Pin 22
50μA
Pin 23
8Vp-p
Pin 5
No.A0641-8/14
LA7209V
ASK Modulation Driver Amplifier Signal Flow
ASK modulation output (+)
ASK modulation output (-)
VCC
VCC
VCC
Instruction data
H
22 Rd 22
L
Carrier (-):13.56MHz
Pin 5 voltage
3
Carrier (+):13.56MHz
2
SW4
11
SW6
4
High : Always on
Low : Linked to pin 7
5
Ra
6
Rb
7
Data high : On
Data low : Off
Read Amplifier Signal Flow
100kΩ : Maximum gain
19
4.7kΩ : Minimum gain
fc=30kHz
4.7kΩ
2nd
LPF
HPF
18
30dB
fc=2.5MHz
21
Adjustable
amplifier
Antenna
Fixed
amplifier
17
24
fc=2.5MHz
4.7kΩ
2nd
LPF
10~30dB
4.0V
HPF
fc=30kHz
3.3V
2V
4.0V
No.A0641-9/14
LA7209V
Description of Functional Settings
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
Rb
Rd
Antenna current
[mVp-p]
[Vp-p]
[Ω]
[Ω]
[kΩ]
[mA]
[mA]
Data : high/low
Data : high/low
Data : high/low
IC current
280
7.9/3.9
15
4.7
1
13.5/6.0
20.9/19.4
220
6.3/3.3
15
4.7
1
10.5/4.8
20.7/19.2
180
4.6/2.5
15
4.7
1
7.8/3.7
20.5/19.0
280
7.1/3.3
22
6.8
1
11.9/4.9
20.9/19.4
220
5.6/2.9
22
6.8
1
9.3/4.0
20.7/19.2
180
4.1/2.3
22
6.8
1
7.0/3.1
20.5/19.0
280
6.2/2.9
33
10
1
10.0/3.9
20.9/19.4
220
4.8/2.5
33
10
1
8.0/3.2
20.7/19.2
180
3.5/1.5
33
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
Pin 7
High (Type A)
Low (type B and C)
*1
On
Pin 4
Pin 6
Data high
Data low
On
Off
*1 : When type A is selected by setting pin 11 high, SW4 and SW6 operate in a linked manner.
MOD
SW4
SW6
CAR
IN+
2
CAR
IN3
TYPE
SW
4
MOD_E
5
6
Ia
Ib
Ra
Rb
MOD
DATA
IN
DATA
SW
7
TYPE
CTL
11
No.A0641-10/14
LA7209V
Degree of Modulation Sample Data
Input level
Output level
Ra
Rb
Rd
Antenna current
IC current
Degree of modulatio
[mVp-p]
[Vp-p]
[Ω]
[Ω]
[kΩ]
[mA]
[mA]
[%]
Data : high/low
Data : high/low
Data : high/low
220
4.8/3.9
10
33
1
8.0/6.0
20.7/19.2
10
220
4.8/0.0
10
33
1
8.0/0.1
20.7/19.2
100
* : This IC can support out-of-standard modulation levels by settings using the resistors Ra and Rb described above.
(3) Output level setting
The output level is set by setting the two items (the input level and the idling current) described above and the
damping resistor (Rd) between pins 22 and 23. Note that although an output amplitude (at pins 22 and 23) of about
two times the VCC voltage can be acquired, if the output voltage limit is exceeded, a collision with the pin 5 voltage
occurs and abnormal oscillation due to VCE saturation may occur. In such cases, changes to the antenna structure
(VCC midpoint supply) and/or damping of the output level will be required.
Output Damping Characteristics Sample Data
Rd
Output level
Ra
Rb
Input level
Antenna current
[Ω]
[Vp-p]
[Ω]
[Ω]
[mVp-p]
[mA]
[mA]
Data : high/low
Data : high/low
Data : high/low
IC current
3.9
8.5/4.6
15
4.7
180
7.8/3.7
20.5/19.0
2.2
6.9/3.5
15
4.7
180
7.8/3.7
20.5/19.0
1
4.6/2.5
15
4.7
180
7.8/3.7
20.5/19.0
3.9
8.1/4.3
22
6.8
180
7.0/3.1
20.5/19.0
2.2
6.5/3.3
22
6.8
180
7.0/3.1
20.5/19.0
1
4.1/2.3
22
6.8
180
7.0/3.1
20.5/19.0
3.9
7.5/3.5
33
10
180
6.0/2.5
20.5/19.0
2.2
5.8/2.9
33
10
180
6.0/2.5
20.5/19.0
1
3.5/1.9
33
10
180
6.0/2.5
20.5/19.0
2. Read amplifier (diode detector, bandpass filter, variable amplifier + fixed amplifier) : Data modulation from
the RF signal
(1) Level setting
The input level is determined by voltage division by the capacitors connected between pins 21 and 22 and between
pins 23 and 24 and the IC internal capacitance. However, note that the input dynamic range of pins 21 and 24 is the
same as the VCC voltage.
(2) Variable amplifier gain setting
The gain is determined by the value of the resistor (Rg) connected between pin 19 and ground.
Note that the range of values that may be used for Rg is from 4.7kΩ (minimum gain) to 100kΩ (maximum gain).
Bandpass Filter Characteristics
–5
25
– 10
20
– 15
15
– 20
10
– 25
5
– 30
10
Variable Amplifier Gain Characteristics
30
Gain [dB]
Response [dB]
0
0
100
1000
Frequency [kHz]
10000
0
10
20
30
40
50
60
70
80
90
100
Pin 19 resistance (=Rg) [kΩ]
No.A0641-11/14
LA7209V
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 kΩ to 1 kΩ 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 10kΩ to 24kΩ 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
No.A0641-12/14
LA7209V
Application Circuit Example
Antenna : 4Turn
VCC1
5V
39pF
DATA
OUT
(to P13)
VCC1
5V
10μH
VCC1
5V
10μH
24
DET
IN-
1.0kΩ
23
MOD
OUT-
68kΩ
100μH
10μF
47pF
VCC1
3V
2.2kΩ
+
47pF
VCC1
3V
10pF
22
21
MOD
DET
OUT+
IN+
20
VCC
19
EVR
CTL
18
EVR
OUT
GAIN
10~30dB
LPF
17
AMP
OUT
3.3kΩ
16
15
14
COMP TAG
COMP
OUT
REF
IN
13
GND
COMP
AMP
EVR
6.8kΩ
GAIN
30dB
TAG
DET
MOD
ON:TYPE-B/C
REG
GND
1
CAR
IN+
2
CAR
IN3
TYPE
SW
4
MOD_E
5
DATA
SW
6
MOD
DATA
IN
7
COMP
TAG
DET
REG
8
TAG TYPE
OUT CTL
10
11
VCC1
5V
9
2.7kΩ
15Ω
100Ω
100Ω
OSC
100Ω
4.7Ω
+
1μF
PWR
SAVE
CTL
12
100pF
0.01μF
10kΩ
Data
Command
(to TP30)
TAG
OUT
(to P3)
Reset
CLT
No.A0641-13/14
LA7209V
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products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
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semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
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to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
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limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
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Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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This catalog provides information as of March, 2007. Specifications and information herein are subject
to change without notice.
PS No.A0641-14/14