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MFRC522 Datasheet(PDF) 87 Page - NXP Semiconductors |
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MFRC522 Datasheet(HTML) 87 Page - NXP Semiconductors |
87 / 109 page ![]() 112132 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 3.2 — 22 May 2007 87 of 109 NXP Semiconductors MFRC522 Contactless Reader IC 23.2 Current Consumption [1] ITVDD depends on TVDD and the external circuitry connected to Tx1 and Tx2 [2] IPVDD depends on the overall load at the digital pins. [3] During operation with a typical circuitry the overall current is below 100 mA. [4] ISPD and IHPD are the total currents over all supplies. [5] Typical value using a complementary driver configuration and an antenna matched to 40 Ω between TX1 and TX2 at 13.56 MHz [6] ISVDD depends on the load at the MFOUT pin. Table 168: Current Consumption Symbol Parameter Conditions Min Typ Max Unit IHPD Hard Power-down Current AVDD =DVDD = TVDD =PVDD =3V, NRESET =LOW [4] -- 5 μA ISPD Soft Power-down Current AVDD =DVDD = TVDD =PVDD = 3 V [4] -- 10 μA IDVDD Digital Supply Current DVDD =3V - 6.5 9 mA IAVDD Analog Supply Current AVDD =3V, bit RCVOff =0 -7 10 mA IAVDD,RCVOFF Analog Supply Current, receiver switched off AVDD =3V, bit RCVOff =1 - 35mA IPVDD Pad Supply Current [2] -- 40 mA ITVDD Transmitter Supply Current Continuous Wave [1][3] -60[5] 100 mA ISVDD MFIN/MFOUT Pad Supply Current [6] -- 4 mA |
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