AD7147A-1ACBZ-RL datasheet(4/69 Pages) AD

部品番号	AD7147A-1ACBZ-RL

部品情報	CapTouch Programmable Controller

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AD7147A

Rev. B | Page 3 of 68

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

8.73

9

9.27

ms

12 conversion stages, decimation = 64

17.46

18

18.54

ms

12 conversion stages, decimation = 128

34.9

36

37.1

ms

12 conversion stages, decimation = 256

Resolution

16

Bits

CINx Input Range

±8

pF

No Missing Codes

16

Bits

Guaranteed by design, but not production tested

CINx Input Leakage

25

nA

Maximum Output Load

20

pF

Capacitance load on CINx to ground

Total Unadjusted Error

±20

%

Output Noise (Peak-to-Peak)

12

Codes

Decimation rate = 64

7

Codes

Decimation rate = 128

3

Codes

Decimation rate = 256

Output Noise (RMS)

1.1

Codes

Decimation rate = 64

0.8

Codes

Decimation rate = 128

0.5

Codes

Decimation rate = 256

CSTRAY Offset Range

20

pF

CSTRAY Offset Resolution

0.32

pF

Low Power Mode Delay Accuracy

4

%

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

ACSHIELD

Frequency

250

kHz

Output Voltage

0

VCC

V

Oscillating

Short-Circuit Source Current

10

mA

Short-Circuit Sink Current

10

mA

Maximum Output Load

150

pF

Capacitance load on ACSHIELD to ground

LOGIC INPUTS (SDI, SCLK, CS, SDA, GPIO)

Input High Voltage, VIH

0.7 × VDRIVE

V

Input Low Voltage, VIL

0.4

V

Input High Current, IIH

−1

μA

VIN = VDRIVE

Input Low Current, IIL

1

μA

VIN = GND

Hysteresis

150

mV

OPEN-DRAIN OUTPUTS (SCLK, SDA, INT)

Output Low Voltage, VOL

0.4

V

ISINK = −1 mA

Output High Leakage Current, IOH

±0.1

±1

μA

VOUT = VDRIVE

LOGIC OUTPUTS (SDO, GPIO)

Output Low Voltage, VOL

0.4

V

ISINK = 1 mA, VDRIVE = 1.65 V to 3.6 V

Output High Voltage, VOH

VDRIVE − 0.6

V

ISOURCE = 1 mA, VDRIVE = 1.65 V to 3.6 V

GPO, SDO Floating State Leakage

Current

±1

μA

Pin three-state, leakage measured to GND and VCC

POWER

VCC

2.6

3.3

3.6

V

VDRIVE

1.65

3.6

V

Serial interface operating voltage

ICC

0.8

1

mA

In full power mode, VCC + VDRIVE, Register 0x00, Bits[15:14] = 00

1.1

1.3

mA

In full power mode, VCC + VDRIVE, Register 0x00, Bits[15:14] = 01

1.2

1.5

mA

In full power mode, VCC + VDRIVE, Register 0x00, Bits[15:14] = 10

1.6

1.8

mA

In full power mode, VCC + VDRIVE, Register 0x00, Bits[15:14] = 11

15.5

24

μA

Low power mode, converter idle, VCC + VDRIVE, decimation = 256;

Register 0x00, Bits[15:14] = 01

2.3

10

μA

Full shutdown, VCC + VDRIVE, Register 0x00, Bits[15:14] = 01

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