ATTINY24-15SSZ Atmel, ATTINY24-15SSZ Datasheet - Page 146

• Manufacturer Part Number: ATTINY24-15SSZ
• Description: MCU AVR 2K FLASH 15MHZ 14-SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY24-15SSZ

• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 12
• Eeprom Size: 128 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Program Memory Size: 2KB (2K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Cpu Family: ATtiny
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: SPI/UART
• Total Internal Ram Size: 128Byte
• # I/os (max): 12
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.8
18.8.1
18.8.2
146
ADC Conversion Result
Atmel ATtiny24/44/84 [Preliminary]
Single Ended Conversion
Unipolar Differential Conversion
Figure 18-12. Differential Non-linearity (DNL)
• Quantization Error: Due to the quantization of the input voltage into a finite number of codes,
• Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
After the conversion is complete (ADIF is high), the conversion result can be found in the ADC
result registers (ADCL, ADCH). The form of the conversion result depends on the type of the
conversion, as there are three types of conversion: single-ended conversion, unipolar differen-
tial conversion and bipolar differential conversion.
For single ended conversion, the result is
where V
Table 18-3 on page 148
0x3FF represents the selected reference voltage minus 1LSB. The result is presented in
one-sided form, from 0x3FF to 0x000.
If differential channels and an unipolar input mode are used, the result is
where V
and V
a range of input voltages (1LSB wide) will code to the same value. Always ±0.5LSB.
an ideal transition for any code. This is the compound effect of offset error, gain error,
differential error, non-linearity, and quantization error. Ideal value: ±0.5LSB.
REF
IN
POS
the selected voltage reference.
is the voltage on the selected input pin and V
is the voltage on the positive input pin, V
Output Code
0x000
0x3FF
and
ADC
0
Table 18-4 on page
=
1 LSB
---------------------------------------------------------- -
V
ADC
POS
–
=
V
V
NEG
V
---------------------------- -
REF
IN
V
REF
149). 0x000 represents analog ground, and
1024
1024
NEG
REF
the voltage on the negative input pin,
the selected voltage reference (see
GAIN
V
REF
Input Voltage
7701D–AVR–09/10