ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 90

• Manufacturer Part Number: ATMEGA8HVD-4MX
• Description: MCU AVR 8K FLASH 2.1-8V 4MHZ QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8HVD-4MX

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 2.4 V
• Data Converters: A/D 1x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 18-MLF® Exposed Pad (Staggered Leads), DFN
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -

17. ADC - Analog-to-Digital Converter
17.1
90
Features
ATmega4HVD/8HVD
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The ATmega4HVD/8HVD features a 10-bit successive approximation ADC. The single-ended
voltage inputs refer to 0V.
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
17-1.
Internal reference voltage of nominally 1.1V is provided on-chip. External input on PV1 pin is
divided by 5 internally to be within the range of the internal reference votlage.
Figure 17-1. Analog-to-Digital Converter Block Schematic
10-bit Resolution
78 µs Conversion Time @ clk
Up to 13 kSPS at Maximum Resolution
External Input Channel with 0 - 5V Input Voltage Range
External Input Channel (ADC0) with 0 - 1V Input Voltage Range
Internal Temperature Sensor Input Channel
1.1V ADC Reference Voltage (typical value)
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
8-BIT DATABUS
ADC0
GND
PV1
INTERNAL 1.1V
REFERENCE
TEMPERATURE
SENSOR
1/5
ADC
ADC CONTROL & STATUS
= 167 kHz
REGISTER (ADCSRA)
AGND
10-BIT DAC
CONVERSION LOGIC
MUX
15
SAMPLE & HOLD
COMPARATOR
ADC DATA REGISTER
ADC CONVERSION COMPLETE IRQ
(ADCH/ADCL)
+
-
0
8052B–AVR–09/08
Figure