DA1641.004

1 February, 2019

11 (14)

DEVICE OUTLINE CONFIGURATION

Top Marking Information:

1641 = Product Number

VVV = Version Number

YWW = Year Week

QFN-16 3.0x3.0x0.75 PIN DESCRIPTION

Pin Name

Pin

Type

Function

Note

RMON

1

AO

Monitoring oscillator adjustment resistor

RCLK

2

AO

System clock adjustment resistor

DSEL

3

DI

Capacitance change direction selection input

DSEL=VIN: Capacitance increase detection

DSEL=GND: Capacitance decrease detection

TEST

4

DO

Open drain test output of measurement oscillator

FEED

5

AI

Input for piezo sounder feedback terminal

VOB

6

DO

Output for piezo sounder brass (ground) terminal

VOS

7

DO

Output for piezo sounder silver terminal

VOUT

8

AO

Charge pump output

CP2

9

AI/O

Flying capacitor 2 positive terminal

CN2

10

AI/O

Flying capacitor 2 negative terminal

CP1

11

AI/O

Flying capacitor 1 positive terminal

CN1

12

AI/O

Flying capacitor 1 negative terminal

VIN

13

P

Power supply

GND

14

G

Supply ground

2

CS

15

AIO

Capacitive sensor sensing terminal

2

RREF

16

AO

Reference oscillator adjustment resistor

EXP_PAD

-

G

Exposed pad

1

G = Ground, P = Power, D = Digital, A = Analog, I = Input, O = Output, NC = Not Connected

Note 1: On PCB the exposed pad must be connected to GND.

Note 2: Capacitive sensor is connected between CS and GND pins. Parasitic capacitances between these signals and surroundings should

be minimized when routing and wiring these signals to the sensor.