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AD822 Scheda tecnica(PDF) 15 Page - Analog Devices

Il numero della parte AD822
Spiegazioni elettronici  MicroConverter짰 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU
PDF  88 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD822 Scheda tecnica(HTML) 15 Page - Analog Devices

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ADuC841/ADuC842/ADuC843
Rev. 0 | Page 15 of 88
EXTERNAL REFERENCE (V)
50
0.5
1.0
2.0
2.5
5.0
55
1.5
60
65
70
75
80
–100
–95
–90
–85
–80
–75
–70
AVDD /DVDD = 5V
fS = 152kHz
SNR
THD
Figure 19. Typical Dynamic Performance vs. VREF, VDD = 5 V
EXTERNAL REFERENCE (V)
80
75
65
50
70
55
AVDD/DVDD = 3V
f
S = 152kHz
0.5
1.5
2.5
SNR
THD
60
–70
–75
–85
–100
–80
–95
–90
1.0
2.0
3.0
Figure 20. Typical Dynamic Performance vs. VREF, VDD = 3 V
FREQUENCY (kHz)
64
66
68
70
72
76
80
78
74
62
60
AVDD /DVDD = 5V
Figure 21. Typical Dynamic Performance vs. Sampling Frequency
TEMPERATURE (
°C)
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
–40
25
85
AVDD/DVDD = 3V
SLOPE = –1.4mV/
°C
Figure 22. Typical Temperature Sensor Output vs. Temperature
GENERAL DESCRIPTION (continued)
The parts also incorporate additional analog functionality with
two 12-bit DACs, power supply monitor, and a band gap
reference. On-chip digital peripherals include two 16-bit ∑-∆.
DACs, a dual output 16-bit PWM, a watchdog timer, a time
interval counter, three timers/counters, and three serial I/O
ports (SPI, I2C, and UART).
On the ADuC812 and the ADuC832, the I2C and SPI interfaces
share some of the same pins. For backwards compatibility, this
is also the case for the ADuC841/ADuC842/ADuC843.
However, there is also the option to allow SPI operate separately
on P3.3, P3.4, and P3.5, while I2C uses the standard pins. The
I2C interface has also been enhanced to offer repeated start,
general call, and quad addressing.
On-chip factory firmware supports in-circuit serial download
and debug modes (via UART) as well as single-pin emulation
mode via the EA pin. A functional block diagram of the parts is
shown on the first page.



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