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AMC7836IPAPR bảng dữ liệu(PDF) 38 Page - Texas Instruments

tên linh kiện AMC7836IPAPR
Giải thích chi tiết về linh kiện  AMC7836 High-Density, 12-Bit Analog Monitor and Control Solution With Multichannel ADC, Bipolar DACs, Temperature Sensor, and GPIO Ports
PDF  91 Pages
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nhà sản xuất  TI2 [Texas Instruments]
Trang chủ  https://www.ti.com
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AMC7836IPAPR bảng dữ liệu(HTML) 38 Page - Texas Instruments

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Temperature (°C)
-40
-25
-10
5
20
35
50
65
80
95
110 125
0
20
40
60
80
100
120
140
160
D001
ADC
12-b
Internal
Reference
(2.5 V)
REF_CMP
C > 4.7 µF
(Minimize
inductance to pin)
Local
Temperatu
re Sensor
AGND2
DAC-0
12-b
DAC-1
12-b
DAC-15
12-b
38
AMC7836
SLAS986D – NOVEMBER 2014 – REVISED FEBRUARY 2018
www.ti.com
Product Folder Links: AMC7836
Submit Documentation Feedback
Copyright © 2014–2018, Texas Instruments Incorporated
7.3.4 Internal Reference
The AMC7836 device includes a high-performance internal reference for the on-chip ADC and 16 DACs (see
Figure 58). The internal reference is a 2.5 V, bipolar transistor-based, precision bandgap reference. A
compensation capacitor (4.7 μF, typical) should be connected between the REF_CMP pin and the AGND2 pin.
The AMC7836 device includes a buffer to drive the ADC and should not be used to drive any external circuitry.
The ADC reference buffer is powered down by default and should be enabled in the ADC configuration register
(address 0x10) during device initialization.
Figure 58. AMC7836 Internal Reference
The internal reference is typically established after power-up in less than 5 ms at TA = 25°C however the
reference settling time is highly dependent on temperature. Figure 59 shows typical reference settling time as a
function of temperature.
Figure 59. Internal Reference Settling Time vs Temperature



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