ADUC842 Analog Devices, ADUC842 Datasheet - Page 15

• Manufacturer Part Number: ADUC842
• Description: Precision Analog Microcontroller: 16MIPS 8052 Flash MCU + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC842

• Mcu Core: 8052
• Mcu Speed (mips): 16
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 8
• Other: PWM

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, I
On the ADuC812 and the ADuC832, the I
share some of the same pins. For backwards compatibility, this
is also the case for the ADuC841/ADuC842/ADuC843.
80
75
70
65
60
55
50
80
75
70
65
60
55
50
Figure 19. Typical Dynamic Performance vs. V
Figure 20. Typical Dynamic Performance vs. V
2
0.5
0.5
C, and UART).
1.0
1.0
EXTERNAL REFERENCE (V)
EXTERNAL REFERENCE (V)
1.5
1.5
2.0
2.0
2.5
AV
f
2.5
S
AV
f
S
2
= 152kHz
DD
DD
= 152kHz
C and SPI interfaces
/DV
/DV
REF
REF
3.0
SNR
SNR
DD
THD
DD
5.0
, V
, V
THD
= 5V
DD
= 3V
DD
= 5 V
= 3 V
–70
–75
–80
–85
–90
–95
–100
–70
–80
–85
–75
–100
–90
–95
∑
-∆.
Rev. 0 | Page 15 of 88
However, there is also the option to allow SPI operate separately
on P3.3, P3.4, and P3.5, while I
I
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.
2
C interface has also been enhanced to offer repeated start,
Figure 21. Typical Dynamic Performance vs. Sampling Frequency
Figure 22. Typical Temperature Sensor Output vs. Temperature
78
74
72
68
66
64
62
60
80
76
70
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
AV
SLOPE = –1.4mV/ ° C
DD
/DV
–40
DD
ADuC841/ADuC842/ADuC843
= 3V
TEMPERATURE ( ° C)
FREQUENCY (kHz)
2
C uses the standard pins. The
25
AV
DD
/DV
85
DD
= 5V