AD7150 datasheet(3/28 Pages) AD

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Data Sheet

AD7150

Rev. A | Page 3 of 28

SPECIFICATIONS

VDD = 2.7 V to 3.6 V; GND = 0 V; −40°C to +85°C, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit1

Test Conditions/Comments

CAPACITIVE INPUT

Conversion Input Range CIN to EXC2

3.2

4 pF input range

1.6

2 pF input range

0.8

1 pF input range

0.4

0.5

0.5 pF input range

Resolution3

2.0

4 pF input range

1.6

2 pF input range

1.4

1 pF input range

1.0

0.5 pF input range

Allowed Capacitance CIN to GND3

100

Allowed Resistance CIN to GND3

MΩ

Allowed Serial Resistance3

125

kΩ

Gain Error

−20

+20

Gain Deviation over Temperature3

0.5

Gain Matching Between Ranges3

−2

Offset Error3

CIN and EXC pins disconnected

Offset Deviation over Temperature3

CIN and EXC pins disconnected

Integral Nonlinearity (INL)3

0.1

Channel-to-Channel Isolation3

Power Supply Rejection3

fF/V

CAPDAC2

Full Range

12.5

Resolution (LSB)3

200

Differential Nonlinearity (DNL)3

0.25

LSB

AutoDAC Increment/Decrement3

% of CIN Range

EXCITATION

Voltage

±VDD/2

Frequency

30.9

32.8

kHz

Allowed Capacitance EXC to GND3

300

Allowed Resistance EXC to GND3

MΩ

LOGIC OUTPUTS (OUT1, OUT2)

Output Low Voltage (VOL)

0.4

ISINK = −4 mA

Output High Voltage (VOH)

VDD – 0.6

ISOURCE = 4 mA

SERIAL INTERFACE INPUTS (SCL, SDA)

Input High Voltage (VIH)

1.5

Input Low Voltage (VIL)

0.8

Input Leakage Current

±0.1

±5

μA

Input Pin Capacitance

OPEN-DRAIN OUTPUT (SDA)

Output Low Voltage (VOL)

0.4

ISINK =

−6.0 mA

Output High Leakage Current (IOH)

0.1

μA

VOUT = VDD

POWER SUPPLY MONITOR

VDD Threshold Voltage

2.45

2.65

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