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ST25R95 Datasheet(PDF) 45 Page - STMicroelectronics

No. de pieza ST25R95
Descripción Electrónicos  Near field communication transceiver
PDF  61 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25R95 Datasheet(HTML) 45 Page - STMicroelectronics

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6.3
Power consumption characteristics
TA = –25 °C to 85 °C, unless otherwise specified.
Table 46. Power consumption characteristics (VPS_Main from 2.7 to 3.3 V)
Symbol
Parameter
Condition
Typ.
Max. Unit
ICC (VPS)
Power-up
Supply current in power-up state
TA = 25°C
200
600
µA
ICC (VPS)
Card emulation
Supply current in card emulation mode
TA = 25 °C
2.5
5.0
mA
ICC (VPS) Hibernate
Supply current in Hibernate state
TA = 25 °C
1
5
µA
ICC (VPS) Sleep/Field Detector Supply current in Sleep/Field Detector state
TA = 25 °C
20/25
80
µA
ICC (VPS) Ready
Supply current in Ready state
TA = 25 °C
2.5
5.0
mA
ICC (VPS)
Tag Detect
Average supply current in Tag Detector state
TA = 25 °C, 4 RF bursts per second
50
100
µA
The ST25R95 supports two VPS_TX supply ranges for RF drivers: 2.7V to 3.3V or 4.5V to 5.5V. Antenna
matching circuit must be defined accordingly.
Table 47. Power consumption characteristics (VPS_TX from 2.7 to 3.3 V)
Symbol
Parameter
Condition
Typ.
Max.
Unit
ICC RF (VPS_TX) RF Field ON
Supply current in RF Field (Reader mode) (1)
TA = 25 °C
70
100
mA
ICC RF (VPS_TX) RF Field OFF
Supply current in RF Field (Ready mode) (2)
TA = 25 °C
-
200
µA
ICC RF (VPS_TX) Tag Detect
Peak current during Burst detection (3)
TA = 25 °C
70
100
mA
1. Parameter measured using recommended output matching network (Z load is 27 Ω and 0°).
2. This consumption can be reduced to approximately 2 µA (typ.) by setting a control bit (bit HF2RF) to ‘1’
using command
090468010710. In this case, Reader mode is not available. To re-enable Reader mode,
reset the HF2RF bit to ‘0’ using the command 090468010700 or execute a new ProtocolSelect command.
3. The maximum differential input voltage between pins RX1 and RX2 (VRx1-Rx2) has a peakpeak of 18 V.
Table 48. Power consumption characteristics (VPS_TX from 4.5 to 5.5 V)
Symbol
Parameter
Condition
Typ.
Max.
Unit
ICC RF (VPS_TX) RF Field ON
Supply current in RF Field (Reader mode) (1)
TA = 25 °C
120
200
mA
ICC RF (VPS_TX) RF Field OFF
Supply current in RF Field (Ready mode) (2)
TA = 25 °C
-
300
µA
ICC RF (VPS_TX) Tag Detect
Peak current during Burst detection (3)
TA = 25 °C
120
200
mA
1. Parameter measured using recommended output matching network (Z load is 27 Ω and 0°C).
2. This consumption can be reduced to approximately 2 µA (typ.) by setting a control bit (bit HF2RF) to ‘1’
using command
090468010710. In this case, reader mode is not available. To re-enable Reader mode,
reset the HF2RF bit to ‘0’ using the command 090468010700 or execute a new ProtocolSelect command.
3. The maximum differential input voltage between pins RX1 and RX2 (VRx1-Rx2) has a peakpeak of 18 V.
This voltage can be limited by adding a damping resistor in parallel of the antenna or between ST_Ro and
ground.
ST25R95
Power consumption characteristics
DS12807 - Rev 4
page 45/61



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