U2270B-MFPY Atmel, U2270B-MFPY Datasheet - Page 11
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U2270B-MFPY
Manufacturer Part Number
U2270B-MFPY
Description
IC BASEREADER RFID 125KHZ 16SOIC
Manufacturer
Atmel
Series
U2270Br
Specifications of U2270B-MFPY
Rf Type
Read / Write
Frequency
125kHz
Features
Read/Write Base Station
Package / Case
16-SOIC (0.154", 3.90mm Width)
Current Consumption
4.5mA
Supply Voltage Range
4.5V To 6.3V
Rf Ic Case Style
SOIC
No. Of Pins
16
Filter Terminals
SMD
Ic Generic Number
2270
Operating Temperature Range
-40°C To +105°C
Rohs Compliant
Yes
Pin Count
16
Screening Level
Industrial
Package Type
SOIC
Operating Temperature Max
105°C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
U2270B-MFPY
Manufacturer:
MICROCHIP
Quantity:
1 200
Part Number:
U2270B-MFPY
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
4.1
4684E–RFID–02/08
Application 1
The application of the U2270B includes the two capacitors C
early dependent on the transponder’s data rate. The following table gives the appropriate values
for the most common data rates. The values are valid for Manchester and bi-phase code.
Table 4-2.
The following applications are typical examples. The values of C
transponder’s data rate only. The arrangement to fit the magnetic-coupling situation is also inde-
pendent of other design issues except for one constellation. This constellation, consisting of
diode feedback plus fine frequency tuning together with the two-rail power supply, should be
used if the transmission distance is d
Application using few external components. This application is for intense magnetic coupling
only.
Figure 4-1.
5V
470 k
Data Rate f = 125 kHz
f / 64 = 1.95 Kbits/s
f / 32 = 3.9 Kbits/s
47 nF
Recommended Capacitor Values
Application Circuit 1
1.5 nF
+
1N4148
47 µF
R
1.2 nF
C
IN
1.35 mH
Input Capacitor (C
10 cm.
V
DV
INPUT
COIL1
COIL2
680 pF
1.2 nF
Batt
S
DGND
U2270B
V
EXT
GND
IN
STANDBY
OUTPUT
)
HIPASS
V
S
CFE
110 k
MS
OE
RF
IN
and C
Decoupling Capacitor (C
C
IN
HP
and C
HP
whose values are lin-
100 nF
220 nF
HP
correspond to the
controller
Micro-
U2270B
V
V
DD
SS
HP
)
11