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參數(shù)資料
| 型號(hào)： | ADUC836BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
| 中文描述： | 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 14 X 14 MM, MO-022-AC-1, MQFP-52 |
| 文件頁數(shù)： | 24/80頁 |
| 文件大?。?/td> | 5913K |
| 代理商： | ADUC836BS |
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ADuC836
–24–
The auxiliary ADC has three external input pins (labeled AIN3
to AIN5) as well as an internal connection to the on-chip tem-
perature sensor. All inputs to the auxiliary ADC are single-ended
inputs referenced to the AGND on the part. Channel selection
bits in the ADC1CON SFR detailed in Table VII allow selection
of one of four inputs.
Two input multiplexers switch the selected input channel to the
on-chip buffer amplifier in the case of the primary ADC and
directly to the
-
modulator input in the case of the auxiliary
ADC. When the analog input channel is switched, the settling
time of the part must elapse before a new valid word is available
from the ADC.
MUX
AIN3
AIN4
AIN5
TEMPESENSOR
MODU-
DIGITAL FILTER
-
ADC
REFIN(–)
REFIN(+)
CHOP
OUTPUT
OUTPUT
DIGTAL OUTPUT
CHOP
-
ADC
-
ARCHITECTURE
CODES. THE ENTIRE
IS CDRIFT ERRORS.
OUTPUT AVERAGE
AIMPLEMENTATION, EACH
FROM THE FILTER IS
WITH ITS PREDECESSOR
TO OFFSET ERRORS.
HIGH FREQUENCY 1-BIT DATA
STIS ALSO CHOPPED) TO THE
ANALOG INPUT VOLTAGE.
-
MODULATOR
PROGRAMMABLE DIGITAL
FILTER
BY THE MODULATOR. THE UPDATE
FILTER ARE PROGRAMMABLE
VIA THE SF SFR.
THE THE CALIBRATION
CBEING PROVIDED AS
THE CONVERSION RESULT.
OUTPUT SCALING
ANALOG INPUT CHOPPING
THREVERSED THROUGH THE
COYIELDS EXCELLENT ADC
OFFSPERFORMANCE.
DIFFERENTIAL REFERENCE
TAND FACILITATES RATIOMETRIC
RVIA THE XREF1 BIT IN ADC1CON.
SHORTED REFERENCE INPUTS.
ANALOG MULTIPLEXER
OR THE ON-CHIP TEMP. SENSOR.
THVIA THE CHANNEL SELECTION
BITS IN ADC1CON.
Figure 8. Auxiliary ADC Block Diagram
Auxiliary ADC
The auxiliary ADC is intended to convert supplementary inputs
such as those from a cold junction diode or thermistor. This ADC
is not buffered and has a fixed input range of 0 V to 2.5 V (assuming
an external 2.5 V reference). The single-ended inputs can be driven
from AIN3, AIN4, or AIN5 pins, or directly from the on-chip
temperature sensor voltage. A block diagram of the auxiliary ADC
is shown in Figure 8.
Analog Input Channels
The primary ADC has four associated analog input pins (labeled
AIN1 to AIN4) that can be configured as two fully differential input
channels. Channel selection bits in the ADC0CON SFR detailed
in Table VI allow three combinations of differential pair selection
as well as an additional shorted input option (AIN2–AIN2).
REV. A
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