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鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉锛� | PIC16F1823-I/P |
| 寤犲晢锛� | Microchip Technology |
| 鏂囦欢闋佹暩(sh霉)锛� | 58/109闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC MCU 8BIT FLASH 14-DIP |
| 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� | 8-bit PIC® Microcontroller Portfolio |
| 鐗硅壊鐢�(ch菐n)鍝侊細 | Extreme Low Power (XLP) Microcontrollers |
| 妯�(bi膩o)婧�(zh菙n)鍖呰锛� | 30 |
| 绯诲垪锛� | PIC® XLP™ 16F |
| 鏍稿績铏曠悊鍣細 | PIC |
| 鑺珨灏哄锛� | 8-浣� |
| 閫熷害锛� | 32MHz |
| 閫ｉ€氭€э細 | I²C锛孡IN锛孲PI锛孶ART/USART |
| 澶栧湇瑷�(sh猫)鍌欙細 | 娆犲妾㈡脯/寰�(f霉)浣�锛孭OR锛孭WM锛學DT |
| 杓稿叆/杓稿嚭鏁�(sh霉)锛� | 12 |
| 绋嬪簭瀛樺劜(ch菙)鍣ㄥ閲忥細 | 3.5KB锛�2K x 14锛� |
| 绋嬪簭瀛樺劜(ch菙)鍣ㄩ鍨嬶細 | 闁冨瓨 |
| EEPROM 澶у皬锛� | 256 x 8 |
| RAM 瀹归噺锛� | 128 x 8 |
| 闆诲 - 闆绘簮 (Vcc/Vdd)锛� | 1.8 V ~ 5.5 V |
| 鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� | A/D 8x10b |
| 鎸暕鍣ㄥ瀷锛� | 鍏�(n猫i)閮� |
| 宸ヤ綔婧害锛� | -40°C ~ 85°C |
| 灏佽/澶栨锛� | 14-DIP锛�0.300"锛�7.62mm锛� |
| 鍖呰锛� | 绠′欢 |
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ATmega164P/324P/644P
21. ADC - Analog-to-digital Converter
21.1
Features
10-bit Resolution
0.5 LSB Integral Non-linearity
卤2 LSB Absolute Accuracy
65 - 260 s Conversion Time
Up to 15 kSPS at Maximum Resolution
8 Multiplexed Single Ended Input Channels
Differential mode with selectable gain at 1x, 10x or 200x(1)
Optional Left adjustment for ADC Result Readout
0 - V
CC ADC Input Voltage Range
2.7 - V
CC Differential ADC Voltage Range
Selectable 2.56V or 1.1V ADC Reference Voltage
Free Running or Single Conversion Mode
ADC Start Conversion by Auto Triggering on Interrupt Sources
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
Note:
1. Differential Mode is not recommended above 85掳C.
21.2
Overview
The ATmega164P/324P/644P features a 10-bit successive approximation ADC. The ADC is
connected to an 8-channel Analog Multiplexer which allows 8 single-ended voltage inputs con-
structed from the pins of Port A. The single-ended voltage inputs refer to 0V (GND).
The device also supports 16 differential voltage input combinations. Two of the differential inputs
(ADC1, ADC0 and ADC3, ADC2) are equipped with a programmable gain stage. This provides
amplification steps of 0 dB (1x), 20 dB (10x), or 46 dB (200x) on the differential input voltage
before the A/D conversion. Seven differential analog input channels share a common negative
terminal (ADC1), while any other ADC input can be selected as the positive input terminal. If 1x
or 10x gain is used, 8-bit resolution can be expected. If 200x gain is used, 6-bit resolution can be
expected. Note that internal references of 1.1V should not be used on 200x gain.
The ADC contains a Sample and Hold circuit which ensures that the input voltage to the ADC is
held at a constant level during conversion. A block diagram of the ADC is shown in Figure 21-1
The ADC has a separate analog supply voltage pin, AVCC. AVCC must not differ more than
卤0.3 V from V
CC. See the paragraph 鈥淎DC Noise Canceler鈥� on page 251 on how to connect this
pin.
Internal reference voltages of nominally 1.1V, 2.56V or AVCC are provided On-chip. The voltage
reference may be externally decoupled at the AREF pin by a capacitor for better noise
performance.
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