DA1641.004
1 February, 2019
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
DSEL
2
3
AO
DI
System clock adjustment resistor
Capacitance change direction selection input
DSEL=VIN: Capacitance increase detection
DSEL=GND: Capacitance decrease detection
Open drain test output of measurement oscillator
Input for piezo sounder feedback terminal
Output for piezo sounder brass (ground) terminal
Output for piezo sounder silver terminal
Charge pump output
Flying capacitor 2 positive terminal
Flying capacitor 2 negative terminal
Flying capacitor 1 positive terminal
Flying capacitor 1 negative terminal
Power supply
TEST
FEED
VOB
VOS
VOUT
CP2
CN2
CP1
CN1
VIN
4
5
6
7
8
DO
AI
DO
DO
AO
AI/O
AI/O
AI/O
AI/O
P
9
10
11
12
13
14
15
16
-
GND
CS
RREF
G
Supply ground
2
2
AIO
AO
G
Capacitive sensor sensing terminal
Reference oscillator adjustment resistor
Exposed pad
EXP_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.
11 (14)
MAS [ MICRO ANALOG SYSTEMS ]
