ST25DV64KC datasheet(150/203 Pages) STMICROELECTRONICS

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9.4

RF electrical parameters

This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the

device in RF mode.

The parameters in the DC and AC characteristics 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 256. RF characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

fCC

External RF signal frequency

13.553

13.56

13.567

MHz

H_ISO

Operating field according to ISO(1)

Range 6

TA = -40 °C to 85 °C

150

5000

mA/m

Range 8

TA = -40 °C to 105 °C

MICARRIER

10% carrier modulation index

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

150 mA/m > H_ISO > 1000 mA/m

100% carrier modulation index

MI=(A-B)/(A+B) (2)

100

tMIN CD

Minimum time from carrier generation to

first data(1)

From H-field min

fSH

Subcarrier frequency high(1)

FCC/32

423.75

kHz

fSL

Subcarrier frequency low(1)

FCC/28

484.28

kHz

Time for ST25DVxxKC response(1)

4352/FC

318.6

320.9

323.3

µs

Time between commands(1)

4192/FC

309

311.5

314

µs

Time between commands(1)

4384/FC

323.3

µs

Wt_Block

RF User memory write time (including

internal Verify) (1)(3)

1 Block

5.2

4 Blocks

19.7

Wt_Byte

RF system memory write time including

internal Verify)(1)(3)

1 Byte

4.9

Wt_MB

RF Mailbox write time (from VCD request

SOF to ST25DVxxKC response EOF)(1)(3)

256 Byte

80.7

Read_MB

RF Mailbox read time (from VCD request

SOF to ST25DVxxKC response EOF) (1)(3)

256 Byte

CTUN

Internal tuning capacitor(2)

f = 13.56 MHz

28.5

VBACK

Backscattered level as defined by ISO test

VMIN_1

RF input voltage amplitude between AC0

and AC1, VSS pin left floating, VAC0-VAC1

peak to peak(1)

Inventory and Read operations

4.8

Write operations

5.25

VMIN_2

AC voltage between AC0 and VSS or

between AC1 and VSS (1)

Inventory and Read operations

2.25

Write operations

2.7

tBootRF

Without DC supply (No VCC)(1)

Set up time

0.6

tRF_OFF

RF OFF time(1)

Chip reset

1. Evaluated by Characterization – Not tested in production.

2. Evaluated by Characterization – Tested in production by correlating industrial tester measure with

characterization results.

3. For VCD request coded in 1 out of 4 and ST25DVxxKC response in high data rate, single sub carrier.

ST25DV04KC ST25DV16KC ST25DV64KC

RF electrical parameters

DS13519 - Rev 3

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