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ADUCM330WFS Datasheet(Fiches technique) 16 Page - Analog Devices

Numéro de pièce ADUCM330WFS
Description  Integrated, Precision Battery Sensor for Automotive Systems
Télécharger  17 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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ADuCM330WFS/ADuCM331WFS
Data Sheet
Rev. A | Page 16 of 17
APPLICATIONS INFORMATION
DESIGN GUIDELINES
Before starting design and layout of the ADuCM330WFS/
ADuCM331WFS on a PCB, it is recommended that the
designer become familiar with the following guidelines that
describe any special circuit considerations and layout
requirements needed.
POWER AND GROUND RECOMMENDATIONS
Place capacitors that are connecting to the ADuCM330WFS/
ADuCM331WFS as close to the pins of the device as possible,
with minimal trace length.
Capacitors connected to the 33VDD, AVDD18, and DVDD18
pins must have a low equivalent series resistance (ESR) rating.
All components must be rated accordingly to the temperature
range expected by the application.
EXPOSED PAD THERMAL RECOMMENDATIONS
It is required that the exposed pad on the underside of the
ADuCM330WFS/ADuCM331WFS be connected to ground to
achieve the best electrical and thermal performance. It is recom-
mended that the user connect an exposed continuous copper
plane on the PCB to the ADuCM330WFS/ADuCM331WFS
exposed pad, and that the copper plane have several vias to
achieve the lowest possible resistive thermal path for heat
dissipation to flow through the bottom of the PCB. It is
recommended that these vias be solder filled or plugged.
GENERAL RECOMMENDATIONS
It is highly recommended to use the schematic given with the
component values shown in Figure 3. The component values
shown in Figure 3 were chosen from the characterization tests
and evaluated for optimum performance of the ADuCM330WFS/
ADuCM331WFS.
Configure the GPIOs as inputs with pull-up resistors enabled to
obtain the lowest possible current consumption in shutdown mode.
Set the Cortex-M3 core clock speed to the minimum required
to meet the application requirements.
*LIN 2.2 PHYSICAL TEST PASSED WITH 220pF CAPACITOR.
27
26
12
13
31
33
29
30
23
18
24
25
10µF
10nF
100nF
100nF
100nF
10nF
1nF
10nF
IIN–
14
IIN–_AUX
11
IIN+_AUX
17
VREF
15
VINP_AUX
16
VINM_AUX
IIN+
100µΩ
SHUNT
VBAT
VDD
VBAT
4
5
6
7
8
32
2
3
10
AVDD18
VTEMP
9
GND_SW
20
28
1
33VDD
21
DVDD33
LIN
RESET
DVDD33
1µF
*
22
DVDD18
0.47µF
0.47µF
19
AVDD18
100nF
1kΩ
ELECTRONIC
CONTROL
UNIT
MASTER
LIN BUS ESD
PROTECTION DIODE
PESD1LIN (optional)
LIN
220Ω
100kΩ
220Ω
1kΩ
10kΩ
NTC
0.47µF
ADuCM330WFS/
ADuCM331WFS
OPTIONAL
Figure 3. External Components Recommended for Proper Operation




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