ST95HF datasheet(58/93 Pages) STMICROELECTRONICS

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Electrical characteristics

ST95HF

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DocID025630 Rev 4

Table 52. Reader characteristics

Symbol

Parameter

Min.

Typ.

Max.

Unit

Frequency of operating field (carrier frequency)

13.553

13.56

13. 567

MHz

MI Carrier

Carrier modulation index(1)

ISO/IEC 14443-A

ISO/IEC 14443-B

ISO/IEC 18092

ISO/IEC 15693 (10% modulation)(2)

ISO/IEC 15693 (100% modulation)

1. Maximum values based on design simulation and/or characterization results, and not tested in production.

100

Transmitter specifications (VPS_TX = 2.7 to 3.3 V)

ZOUT differential impedance between TX1 and

TX2(1)

-27-

Output power for 3V operation on pin VPS_TX (1)(2)

2. Parameter measured on samples using recommended output matching network. (Z load is 27

Ω and 0°.)

-55-

Transmitter specifications (VPS_TX = 4.5 to 5.5 V)

ZOUT differential impedance between TX1 and

TX2(1)

-16-

Output power for 5V operation on pin VPS_TX (1) (2)

-230

Receiver specifications

Small signal differential input resistance

(Rx1/Rx2)(1)

-100

VRx1-Rx2

Differential input voltage between pins RX1 and

RX2(3)

3. This voltage can be limited by adding a damping resistor in parallel of the antenna or between ST_R0 and

Ground.

Small signal differential input capacitance

(Cx1/Cx2)(1)

-22-

Sensitivity (106 Kbps data rate)(4)

4. Based on ISO/IEC 10373-6 protocol measurement. The reader sensitivity corresponds to the load

modulation value of the REQ reply sent by an ISO reference card when decoded by the ST95HF.

-8-

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