MAX1441 Datasheet, PDF (6/41 Pages) Maxim Integrated Products – Automotive, Two-Channel Proximity and Touch Sensor

Automotive, Two-Channel Proximity and
Touch Sensor
Pin Configuration
TOP VIEW
P0.4 1
P0.3/TMS 2
P0.2/INT2/TDI 3
P0.1/ INT1/ TDO 4
P0.0/ INT0 / TCK 5
RESET 6
AGUD1 7
SINPUT1 8
VAA 9
VBATT 10
MAX1441
TSSOP
20 V_DD
19 DGND
18 OUT1
17 OUT2
16 I.C.
15 I.C.
14 AGUD2
13 SINPUT2
12 AGND
11 N.C.
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15, 16
17
18
19
20
Pin Description
NAME
P0.4
P0.3/TMS
P0.2/INT2/TDI
P0.1/INT1/TDO
P0.0/INT0/TCK
RESET
AGUD1
SINPUT1
VAA
VBATT
N.C.
AGND
SINPUT2
AGUD2
I.C.
OUT2
OUT1
DGND
VDD
FUNCTION
CPU Port 0 Bit 4. Digital input/output.
CPU Port 0 Bit 3/TMS. Digital input/output.
CPU Port 0 Bit 2/TDI. Digital input/output with configurable edge-triggered interrupt.
CPU Port 0 Bit 1/TDO. Digital input/output with configurable edge-triggered interrupt.
CPU Port 0 Bit 0/TCK. Digital input/output with configurable edge-triggered interrupt.
Active-Low Reset Input. RESET requires an external pullup to VDD.
Active Guard 1. Driven guard (active shield) output for channel 1.
Sensor Input 1. Capacitive sensor electrode input for channel 1.
Analog Power Supply. VAA is internally connected to the output of an on-chip 3.4V linear regulator.
Connect V_AA to V_DD. Bypass V_AA with a 0.47FF capacitor to AGND as close to V_AA as possible.
Power-Supply Voltage. Input to the 3.4V on-chip linear regulator. Bypass VBATT to AGND with a
0.1FF capacitor as close to V_BATT as possible.
No Connection. Not internally connected. Leave N.C. unconnected.
Analog Ground. Connect AGND to DGND.
Sensor Input 2. Capacitive sensor electrode input for channel 2.
Active Guard 2. Driven guard (active shield) output for channel 2.
Internally Connected. Leave unconnected.
Open-Drain Output 2. CPU port 0 bit 6.
Open-Drain Output 1. CPU port 0 bit 5.
Digital Ground. Connect DGND to AGND.
Digital Power Supply. Connect VDD to VAA. Bypass VDD with a 0.47FF capacitor to DGND as
close to V_DD as possible.
6