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參數(shù)資料
| 型號： | ADUC845 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| 中文描述： | MicroConverter的多通道ADC的24-/16-Bit與嵌入式62 kB閃存以及單周期控制器 |
| 文件頁數(shù)： | 36/108頁 |
| 文件大小： | 1109K |
| 代理商： | ADUC845 |
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ADuC845/ADuC847/ADuC848
DATA OUTPUT CODING
When the primary ADC is configured for unipolar operation,
the output coding is natural (straight) binary with a zero differ-
ential input voltage resulting in a code of 000...000, a midscale
voltage resulting in a code of 100...000, and a full-scale voltage
resulting in a code of 111...111. The output code for any analog
input voltage on the main ADC can be represented as follows:
Code
– (
AIN
×
GAIN
× 2
N
) / (1.024 ×
V
REF
)
Rev. A | Page 36 of 108
where:
AIN
is the analog input voltage.
GAIN
is the PGA gain setting, that is, 1 on the 2.56 V range and
128 on the 20 mV range, and
N
= 24 (16 on the ADuC848).
The output code for any analog input voltage on the auxiliary
ADC can be represented as follows:
Code
= (
AIN
× 2
N
) / (
V
REF
)
with the same definitions as used for the primary ADC above.
When the primary ADC is configured for bipolar operation, the
coding is offset binary with negative full-scale voltage resulting
in a code of 000...000, a zero differential voltage resulting in a
code of 800…000, and a positive full-scale voltage resulting in a
code of 111...111. The output from the primary ADC for any
analog input voltage can be represented as follows:
Code
= 2
N
1
[(
AIN
×
GAIN
) / (1.024 ×
V
REF
) + 1]
where:
AIN
is the analog input voltage.
GAIN
is the PGA gain, that is, 1 on the ±2.56 V range and
128 on the ±20 mV range.
N
= 24 (16 on the ADuC848).
The output from the auxiliary ADC in bipolar mode can be
represented as follows:
Code
= 2
N
1
[(
AIN
/
V
REF
) + 1]
EXCITATION CURRENTS
The ADuC845/ADuC847/ADuC848 contain two matched,
software-configurable 200 μA current sources. Both source
current from AV
DD
, which is directed to either or both of the
IEXC1 (Pin 11 whose alternate functions are P1.6/AIN6) or
IEXC2 (Pin 12, whose alternate functions are P1.7/AIN7) pins
on the device. These currents are controlled via the lower four
bits in the ICON register (Table 30). These bits not only enable
the current sources but also allow the configuration of the
currents such that 200 μA can be sourced individually from
both pins or can be combined to give a 400 μA source from one
or the other of the outputs. These sources can be used to excite
external resistive bridge or RTD sensors (see Figure 70).
ADC POWER-ON
The ADC typically takes 0.5 ms to power up from an initial
start-up sequence or following a power-down event.
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PDF描述 |
|---|---|
| ADUC845BCP8-3 | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| ADUC847BCP8-3 | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| ADUC845BCP8-5 | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| ADUC847BCP8-5 | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| ADUC845BCP62-3 | MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC845_12 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter?? Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
| ADUC845BCP32-3 | 制造商:Analog Devices 功能描述:10 CHANNEL 24 BIT DUAL ADC + FAST 8BIT UP - Trays |
| ADUC845BCP32-5 | 制造商:Analog Devices 功能描述:10 CHANNEL 24 BIT DUAL ADC + FAST 8BIT UP - Trays |
| ADUC845BCP62-3 | 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 56-Pin LFCSP EP |
| ADUC845BCP62-5 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU |
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