AD7143ACPZ-1REEL datasheet(4/57 Pages) AD

부품명	AD7143ACPZ-1REEL

상세설명	Programmable Controller for Capacitance Touch Sensors

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AD7143

Rev. 0 | Page 3 of 56

SPECIFICATIONS

VCC = 2.6 V to 3.6 V, TA = −40oC to +85°C, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

CAPACITANCE-TO-DIGITAL CONVERTER

Update Rate

23

25

26

ms

Eight conversion stages in sequencer, decimation = 256

Resolution

16

Bit

CIN Input Range1

±2

pF

No Missing Codes

16

Bit

Guaranteed by design, but not production tested

CIN Input Leakage

25

nA

Total Unadjusted Error

±20

%

Output Noise (Peak-to-Peak)

7

Codes

Decimation rate = 128

3

Codes

Decimation rate = 256

Output Noise (RMS)

0.8

Codes

Decimation rate = 128

0.5

Codes

Decimation rate = 256

Parasitic Capacitance

40

pF

Parasitic capacitance to ground, per CIN input guaranteed

by characterization

CBULK Offset Range1

±20

pF

CBULK Offset Resolution

156.25

fF

Low Power Mode Delay Accuracy

5

%

% of 200 ms, 400 ms, 600 ms, or 800 ms

EXCITATION SOURCE

Frequency

237.5

240

262.5

kHz

Output Voltage

VCC

V

Short-Circuit Source Current

20

mA

Short-Circuit Sink Current

50

mA

Maximum Output Load

250

pF

Capacitance load on source to ground

CSHIELD Output Drive

10

μA

CSHIELD Bias Level

VCC/2

V

LOGIC INPUTS (SCLK, SDA)

VIH Input High Voltage

0.7 × VDRIVE

V

VIL Input Low Voltage

0.4

V

IIH Input High Voltage

−1

μA

IIL Input Low Voltage

1

μA

VIN = GND

Hysteresis

150

mV

OPEN-DRAIN OUTPUTS (SCLK, SDA, INT)

VOL Output Low Voltage

0.4

V

ISINK = −1 mA

IOH Output High Leakage Current

+0.1

±1

μA

POWER

VCC

2.6

3.3

3.6

V

VDRIVE

1.65

3.6

V

ICC

0.9

1

mA

In full power mode

20

μA

Low power mode, converter idle, TA = 25°C

16

30

μA

Low power mode, converter idle

4.5

μA

Full shutdown, TA = 25°C

2.25

15

μA

Full shutdown

1 CIN and CBULK are defined as follows:

PLASTIC OVERLAY

SENSOR BOARD

CBULK

CIN

CAPACITIVE SENSOR

유사한 부품 번호 - AD7143ACPZ-1REEL

제조업체	부품명	데이터시트	상세설명
Analog Devices	AD7143ACPZ-1REEL	1,006Kb / 56P	Programmable Controller for Capacitance Touch Sensors REV. 0

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