SR176

DC and ac parameters

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8

DC and ac parameters

This section summarizes the operating and measurement conditions, and the dc and ac

characteristics of the device. The parameters in the dc and ac characteristic tables that

follow are derived from tests performed under the Measurement Conditions summarized in

the relevant tables. Designers should check that the operating conditions in their circuit

match the measurement conditions when relying on the quoted parameters.

Table 6.

Operating conditions

Symbol

Parameter

Min.

Max.

Unit

Ambient operating temperature

Wafer

–20

85

°C

A3, A4, A5

–20

85

°C

Table 7.

DC characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Regulated voltage

2.5

3.5

V

Retromodulation induced voltage

ISO 10373-6

20

mV

Internal tuning capacitor

13.56 MHz

64

pF

Table 8.

1.

All timing measurements were performed on a reference antenna with the following characteristics:

External size: 75 mm x 48 mm

Number of turns: 3

Width of conductor: 1 mm

Space between 2 conductors: 0.4 mm

Value of the coil: 1.4 µH

Tuning Frequency: 14.4 MHz.

Symbol

Parameter

Condition

Min

Max

Unit

External RF signal frequency

13.553

13.567

MHz

MI=(A-B)/(A+B)

10

14

%

10% rise and fall time

10% to 90%

0.5

1.5

µs

10% modulation pulse width

9.44

µs

ASK modulation data jitter

Coupler to SR176

- 2

+ 2

µs

Minimum time from carrier

generation to first data

From H-field Min

40

µs

Subcarrier frequency

847.5

kHz

Antenna reversal delay

151

µs

Synchronization delay

151

µs

Answer to new request delay

14 ETU

132

µs

Time between request

characters

Coupler to SR176

0

57

µs

Time between answer

characters

SR176 to Coupler

0

µs

Programming time for WRITE

5

ms