ATTINY48-MMHR Atmel, ATTINY48-MMHR Datasheet - Page 172

• Manufacturer Part Number: ATTINY48-MMHR
• Description: MCU AVR 4KB FLASH 12MHZ 28QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY48-MMHR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 24
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.9
172
Analog Noise Canceling Techniques
ATtiny48/88
Figure 17-8. Analog Input Circuitry
Note:
Digital circuitry inside and outside the device generates EMI which might affect the accuracy of
analog measurements. When conversion accuracy is critical, the noise level can be reduced by
applying the following techniques:
Figure 17-9. ADC Power Connections
• Keep analog signal paths as short as possible.
• Make sure analog tracks run over the analog ground plane.
• Keep analog tracks well away from high-speed switching digital tracks.
• If any port pin is used as a digital output, it mustn’t switch while a conversion is in progress.
• The analog supply voltage pin (AV
(V
CC
) via an LC network as shown in
The capacitor in the figure depicts the total capacitance, including the sample/hold capacitor and
any stray or parasitic capacitance inside the device. The value given is worst case.
ADCn
I
IH
I
IL
CC
) should be connected to the digital supply voltage pin
Figure
17-9.
1..100 kOhm
PC1 (ADC1)
PC0 (ADC0)
PA1 (ADC7)
GND
PC7
PA0 (ADC6)
AVCC
PB5
C
VCC
S/H
= 14 pF
V
CC
/2
8008G–AVR–04/11