AD7151BRMZ View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD7151BRMZ

Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing

Analog Devices 

AD7151

SPECIFICATIONS

VDD = 2.7 V to 3.6 V; GND = 0 V; –40°C to +85°C, single-ended capacitance mode, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

CAPACITIVE INPUT

Conversion Input Range CIN to EXC2 3.2

4

1.6

2

0.8

1

0.4

0.5

Resolution3

2.0

1.6

1.4

1.0

Allowed Capacitance CIN to GND3

150

Allowed Resistance CIN to GND3

15

Allowed Serial Resistance3

200

Gain Error

−20

+20

Gain Deviation over Temperature3

0.5

Gain Matching Between Ranges3

−2

+2

Offset Error3

50

Offset Deviation over Temperature3

5

Integral Nonlinearity (INL)3

0.1

Power Supply Rejection3

4

CAPDAC2

Full Range

10

12.5

Resolution (LSB)3

200

Differential Nonlinearity (DNL)3

0.25

AutoDAC Increment/Decrement3

25

75

EXCITATION

Voltage

±VDD/2

Frequency

15.4

16

16.3

Allowed Capacitance EXC to GND3

300

Allowed Resistance EXC to GND3

1

LOGIC OUTPUT (OUT)

Output Low Voltage (VOL)

0.4

Output High Voltage (VOH)

VDD – 0.6

SERIAL INTERFACE INPUTS (SCL, SDA)

Input High Voltage (VIH)

1.5

Input Low Voltage (VIL)

0.8

Input Leakage Current

±0.1

±5

Input Pin Capacitance

6

OPEN-DRAIN OUTPUT (SDA)

Output Low Voltage (VOL)

0.4

Output High Leakage Current (IOH)

0.1

5

POWER SUPPLY MONITOR

VDD Threshold Voltage

2.45

2.65

Unit 1

Test Conditions/Comments

pF

4 pF input range

pF

2 pF input range

pF

1 pF input range

pF

0.5 pF input range

fF

4 pF input range

fF

2 pF input range

fF

1 pF input range

fF

0.5 pF input range

pF

MΩ

kΩ

%

%

%

fF

CIN and EXC pins disconnected

fF

CIN and EXC pins disconnected

%

fF/V

pF

fF

LSB

% of CIN Range

V

kHz

pF

MΩ

V

ISINK = −4 mA

V

ISOURCE = 4 mA

V

V

μA

pF

V

ISINK = −6.0 mA

μA

VOUT = VDD

V

Rev. 0 | Page 3 of 28

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