ATtiny25 Automotive Atmel Corporation, ATtiny25 Automotive Datasheet - Page 137

• Manufacturer Part Number: ATtiny25 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny25 Automotive

• Flash (kbytes): 2 Kbytes
• Pin Count: 8
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 6
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

18. Analog-to-Digital Converter
18.1
18.2
7701E–AVR–02/11
Features
Overview
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The Atmel
verter (ADC). The ADC is connected to 8-pin port A for external sources. In addition to
external sources, the internal temperature sensor can be measured by the ADC. The analog
multiplexer allows 8 single-ended channels or 12 differential channels from port A. The pro-
grammable gain stage provides amplification steps 0dB (1x) and 26dB (20x) for 12 differential
ADC channels.
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
18-1 on page
And internal reference voltage of nominally 1.1V is provided on chip. Alternatively, VCC can
be used as reference voltage for single-ended channels. There is also an option to use an
external voltage reference and turn off the internal voltage reference.
10-bit Resolution
1.0 LSB Integral Non-linearity
±2 LSB Absolute Accuracy
65 - 260µs Conversion Time
Up to 76kSPS at Maximum Resolution
Eight Multiplexed Single-Ended Input Channels
Twelve differential input channels with selectable gain (1x, 20x)
Temperature sensor input channel
Optional Left Adjustment for ADC Result Readout
0 - V
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 Canceller
Unipolar / Bipolar Input Mode
Input Polarity Reversal channels
CC
ADC Input Voltage Range
®
ATtiny24/44/84 features a 10-bit successive approximation analog-to-digital con-
138.
Atmel ATtiny24/44/84 [Preliminary]
Figure
137