AK4161 Datasheet, PDF(6/12 Page) Asahi Kasei Microsystems – 6-channel Capacitive Touch Sensor IC

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AK4161 Datasheet, PDF (6/12 Pages) Asahi Kasei Microsystems – 6-channel Capacitive Touch Sensor IC

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[AK4161]

ANALOG CHARACTERISTICS

(Ta = -40ï°C ~ 85ï°C, VDD = 3.3V; unless otherwise specified)

Parameter

Symbol min

typ

max Unit

A/D Converter

Resolution

RESO

Bits

Touch Sensor

Charge Current Variation Against Nominal Value (Note 6) ICHG

-30

Power Supply Current

Measurement Current (All function in active)

Idle Current

Average Supply Current (Note 7)

TSR= 0.25ms

TSR= 0.5ms

TSR= 1ms

TSR= 2ms

TSR= 4ms

TSR=8ms

TSR=16ms

TSR=32ms

TSR=1ms, 20 samplings at 1st order Filter

TSR=32ms, 20 samplings at 1st order Filter

TSR=512ms, 20 samplings at 1st order Filter

Shutdown Current (After External Reset)

IMEAS

IIDLE

IDD

ISHUT

0.765

3.15

687

351

177

489

4.1

1.2

8.0

Note 6. Sense terminal voltage condition: The AD conversion value should be less or equal to VDD-0.2[V]. (It should be

less or equal to VDD-0.3[V] when CC2Xn bit= â1â) The charge current is dependent on the operating voltage,

and is configured by register settings in the range of â0.556 x VDD [uA]â to â70.056 x VDD [uA]â.

Note 7. Measurement Condition: 6 active sense terminals, 2us charge period, 6 samplings at 1st order filter for noise

cancelling, using sense terminal with 22pF capacitance.

MS1450-E-02-PB

-6-

2014/05

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