iC-TW3 SENSOR SIGNAL CONDITIONER WITH
TEMPERATURE COMPENSATION AND LINE DRIVER
Rev B1, Page 3/24
PACKAGES
PIN CONFIGURATION QFN32 5 mm x 5 mm
PIN FUNCTIONS
No. Name
Function
1 PINZ
2 NINZ
Signal Input Z+
Signal Input Z-
32 31 30 29 28 27 26 25
3 TESTEN Test Mode Enable Input
4 CLK
5 NZO
6 ZO
7 GNDB
8 VDDB
9 NBO
External Clock Input
Signal Output Z-
Signal Output Z+
Driver Ground
+3...+5.5 V Driver Supply Voltage
Signal Output B-
Signal Output B+
Digital Ground
I2C Interface, clock line
I2C interface, data line
+3...+5.5 V Digital Supply Voltage
Driver Ground
24
23
22
21
20
19
18
17
1
2
3
4
TW3
10 BO
5
11 GND
12 SCL
13 SDA
14 VDD
15 GNDA
16 n.c.
code...
6
7
...
8
not connected
Signal Output A+
9
10 11 12 13 14 15 16
17 AO
18 NAO
19 VDDA
20 1W
21 NERR
22 NRST
Signal Output A-
+3...+5.5 V Driver Supply Voltage
1-Wire Interface, bidirectional port
Error Message Output, active low
External Reset Input, active low
23 NSTORE* Coefficient Store Input, active low
24 n.c.
not connected
25 NINA
26 PINA
27 KELVIN
28 GNDIN
29 VDDIN
30 PINB
31 NINB
32 VC
Signal Input A-
Signal Input A+
External Temperature Sensor Input
Input Ground
+3...+5.5 V Input Supply Voltage
Signal Input B+
Signal Input B-
1.21 V Reference Voltage Output,
Reference Voltage Input
TP TP**
Thermal Pad
Notes:
*) Pin NSTORE should be wired to VDD.
**) The Thermal Pad of the QFN package (bottom side) is to be connected to a ground plane on the PCB which
must have GND potential.
ICHAUS [ IC-HAUS GMBH ]
