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ST25R95 Datasheet(PDF) 45 Page - STMicroelectronics |
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ST25R95 Datasheet(HTML) 45 Page - STMicroelectronics |
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45 / 61 page  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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