参数资料
型号: ATICE50MEM
厂商: Atmel
文件页数: 28/73页
文件大小: 0K
描述: ICE50 EXTENSION MEMORY CARD
标准包装: 1
附件类型: ICE50 内存扩展卡
适用于相关产品: 100 引脚 megaAVR 设备
产品目录页面: 615 (CN2011-ZH PDF)
General Description
3.5.3
3.5.4
Analog Comparator
A/D Converter
The Analog Comparator is built around a high speed comparator and a CMOS output
buffer/voltage converter. Figure 3-20 shows the Analog Comparator block diagram. The
total propagation delay from the AIN0 and AIN1 pins to the internal ACO signal is typi-
cally 90ns, max 210ns. For parts, the total propagation delay from the AIN0 and AIN1
pins to the internal ACO signal is typically 500 ns, max 750 ns.
The comparator features an internal hysteresis of typical 1 mV, max 4 mV @ 25 ° C to
ensure clean switching.
Figure 3-20. Analog Comparator Block Diagram
ANALOG COMPARATOR
1.2V
ACBG
ACD
AIN0
+
ACO
-
100R
AIN1
ACME
ADEN
ADC Multiplexer
Output
The block diagram of the ICE50 AD converter is shown in Figure 3-21.
Figure 3-21. ICE50 AD Converter
ADC7
ADC6
ADC5
ADC4
ADC3
ADC2
ADC1
ADC0
330 ?
330 ?
330 ?
330 ?
330 ?
330 ?
330 ?
330 ?
Pos
Input
Mux
V CC
V CC
1.2V
A/D Converter
ADC Multiplexer Output
1x/10x/100x
+
10K
-
ref
10K
1x/2x
+
- ref
10-bit ADC
Vin
Q[0..9]
Vref
Neg
Input
Mux
ADMUX Decoder
+
-
10K
10K
+
-
Vref
2
AVCC
Aref
330 ?
330 ?
2.5V
Voltage
Aref Out Reference
Selection
3-14
2523A–AVR–11/02
ICE50 User Guide
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