AS3909 datasheet(8/77 Pages) AMSCO

8 / 77 page

AS3909/AS3910 – 8

ams Datasheet, Confidential: 2013-Oct [3-02]

E l ec t r i c al C h a r ac teri sti c s

Electrical Specification

VDD = 3.3V, Temperature = 25ºC, unless otherwise noted.

Figure 9:

Electrical Characteristics

Output Resistance

250

500

SPI Timing

TSENL

SPI reset (SEN low)

100

TSCLKL

SCLK low

100

TSCLKH

SCLK high

100

TSENCLKR

SEN rising to SCLK rising

first SCLK pulse

TSENCLKF

SCLK falling to SEN falling

last SCLK pulse

Symbol

Parameter

Comments

Min

Typ

Max

Unit

IPD

Supply current in Power-down

mode

0.3

μA

INFC

Supply current in Initial NFC

target mode

3.5

μA

IRD

Supply current in Ready mode

13.56 MHz Xtal used,

MCU_CLK disabled

IRA

Supply current Receiver active

13.56 MHz Xtal used,

MCU_CLK disabled

ILP

Supply current Receiver active,

low power mode

RRFO

RFO1 and RFO2 driver output

resistance

IRFO=10mA

All segments ON

1.5

VRFI

RFI input sensitivity

fSUB=848kHz

(1)

0.5

mVrms

VRFI_LP

RFI input sensitivity, low power

receiver mode

fSUB=848kHz

1.5

mVrms

RRFI

RFI input resistance

kΩ

VPOR

Power on Reset Voltage

1.0

1.4

<2.4

VAGD

AGD voltage

1.4

1.5

1.6

VAR

Regulator drop

After execution of direct

command Adjust

Regulators

250

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

AS3909 Datasheet(PDF) 8 Page - ams AG

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