TK5551 ATMEL Corporation, TK5551 Datasheet - Page 6

• Manufacturer Part Number: TK5551
• Description: Standard Read/write Id Transponder With Anti-collision
• Manufacturer: ATMEL Corporation

7. Measurement Assembly
6
TK5551
All parameters are measured in a Helmholtz arrangement, which generates a homogenous
magnetic field (see
coils, so the magnetic field can be varied in frequency and field strength.
Figure 7-1.
Figure 7-2.
REFERENCE COIL
( IN PHASE )
24 mm
REFERENCE COIL
Testing Application
Testing Geometry
FIELD GENERATING COIL
Figure 7-1
SENSING COILS ( IN PHASE )
FIELD GENERATING
COILS ( IN PHASE )
GENERATOR
and
TK5551
FUNCTION
5 mm
SENSING COIL
Figure
2 mm
7-2). A function generator drives the field generating
TK5551
30 mm
15 mm
REFERENCE COIL ( IN PHASE )
SENSING COIL
SUBTRACTOR
FIELD GENERATING COIL
AMPLIFIER
1:10
REFERENCE COIL
4709F–RFID–06/06
OUTPUT
VOLTAGE
60 mm