AMC7832 Datasheet, PDF (60/70 Pages) Texas Instruments – AMC7832 12-Bit Analog Monitor and Control Solution with Multi-Channel ADC, Bipolar DACs, Temperature Sensor and GPIO Ports

AMC7832
SLAS836 – MARCH 2014
11 Layout
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11.1 Layout Guidelines
• All Power Supply terminals should be bypassed to ground with a low ESR ceramic bypass capacitor. The
typical recommended bypass capacitance is 10-µF ceramic with a X7R or NP0 dielectric.
• To minimize interaction between the analog and digital return currents, the digital and analog sections should
have separate ground planes that eventually connect at some point.
• To reduce noise on the internal reference, a 4.7-µF capacitor is recommended between the REF_CMP and
GND.
• A high-quality ceramic type NP0 or X7R is recommended for its optimal performance across temperature, and
very low dissipation factor.
11.2 Layout Example
Bypass Capacitor
close to DV_DD
0.1uF
0.1uF
DGND 1
DVDD
2
IOVDD
3
RESET
4
SDO
5
SDI
6
SCLK
7
CS
8
GPIO0/ALARMIN
9
GPIO1/ALARMOUT
10
GPIO2/ADCTRIG
11
GPIO3/DAV
12
GPIO4
13
GPIO5
14
GPIO6
15
GPIO7
16
Bypass Capacitor
close to AV_EE
0.1uF
0.1uF
Bypass Capacitor
close to AV_CC
0.1uF
48
ADC_3
47
ADC_4
46
ADC_5
45
LV_ADC12
44
LV_ADC13
43
LV_ADC14
42
LV_ADC15
41
LV_ADC16
40
ADC_6
39
ADC_7
38
ADC_8
37
ADC_9
36
ADC_10
35
ADC_11
34
AVDD2
33 AGND2
0.1uF
0.1uF
Bypass Capacitors
close to AV_DD
0.1uF
Compensation Capacitor
close to REF-CMP pin
Figure 62. AMC7832 Example Board Layout
60
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