AD7151 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD7151

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

Analog Devices 

AD7151

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

GND 1

VDD 2

NC 3

CIN 4

NC 5

10 SDA

AD7151

TOP VIEW

(Not to Scale)

9 SCL

8 NC

7 OUT

6 EXC

NC = NO CONNECT

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic Description

1

GND

Ground Pin.

2

VDD

Power Supply Voltage. This pin should be decoupled to GND using a low impedance capacitor, for example,

0.1 μF X7R multilayer ceramic.

3

NC

This pin should be left as an open circuit or connected to GND.

4

CIN

CDC Capacitive Input. The measured capacitance (sensor) is connected between the EXC pin and the CIN pin.

5

NC

This pin should be left as an open circuit.

6

EXC

CDC Excitation Output. The measured capacitance is connected between the EXC pin and the CIN pin.

7

OUT

Logic Output. High level on this output indicates proximity detected on the capacitive input.

8

NC

This pin should be left as an open circuit.

9

SCL

Serial Interface Clock Input. Connects to the master clock line. Requires a pull-up resistor if not provided

elsewhere in the system.

10

SDA

Serial Interface Bidirectional Data. Connects to the master data line. Requires a pull-up resistor if not provided

elsewhere in the system.

Rev. 0 | Page 6 of 28

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