MCRF450/451/452/455
TABLE 2-8: INTERNAL RESONANT CAPACITANCE AND ANTENNA INDUCTANCE
REQUIREMENTS
Device
Name
Resonant
Capacitance
(Antenna A to
VSS)
External
Inductance
Requirement
between Antenna
A and VSS for
13.56 MHz tag
Connection to External
Antenna Circuit
Reference
MCRF451 95 pF ±10%
1.45 µH ±10%
Antenna A, B, and
VSS pads
This device requires three
connections to an external circuit.
Good for direct die attachment onto
antenna.
MCRF452 30 pF ±10%
4.591 µH ±10%
Antenna A and VSS pads This device requires only two
antenna connections. Good for both
direct die attachment and COB.
MCRF455 50 pF ±10%
2.76 µH ±10%
Antenna A, B, and
VSS pads
This device requires three
connections to an external circuit.
Good for direct die attachment onto
antenna.
Note: The internal capacitance value for bumped die is about 1 pF higher than the unbumped die’s capacitor.
2003 Microchip Technology Inc.
DS40232H-page 11