ATtiny26 Atmel Corporation, ATtiny26 Datasheet - Page 94

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ATtiny26

Manufacturer Part Number
ATtiny26
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny26

Flash (kbytes)
2 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
16
Ext Interrupts
11
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.12
Eeprom (bytes)
128
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
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
3
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes

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Analog to
Digital
Converter
Features
94
ATtiny26(L)
The ATtiny26(L) features a 10-bit successive approximation ADC. The ADC is connected to an
11-channel Analog Multiplexer which allows eight differential voltage input combinations or 11
single-ended voltage inputs constructed from seven pins from Port A and four pins from Port B.
Seven of the differential inputs are equipped with a programmable gain stage, providing amplifi-
cation steps of 0 dB (1x) and 26 dB (20x) on the differential input voltage before the A/D
conversion. There are four groups of three differential analog input channel selections. All input
channels in each group share a common negative terminal, while another ADC input can be
selected as the positive input terminal. The single-ended voltage inputs refer to 0V (GND).
The ADC contains a Sample and Hold Amplifier 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 Figure 51.
The ADC has an analog supply voltage pin, AVCC. The voltage on AVCC must not differ more
than ±0.3V from V
how to connect these pins.
An internal reference voltage of nominally 2.56V is provided On-chip, and this reference may be
externally decoupled at the AREF pin by a capacitor.
10-bit Resolution
±2 LSB Absolute Accuracy
0.5 LSB Integral Non-linearity
Optional Offset Cancellation
13 - 260 µs Conversion Time
11 Multiplexed Single Ended Input Channels
8 Differential Input Channels
7 Differential Input Channels with Optional Gain of 20x
Optional Left Adjustment for ADC Result Readout
0 - AVCC ADC Input Voltage Range
Selectable ADC Reference Voltage
Free Running or Single Conversion Mode
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
CC
. See the paragraph “ADC Noise Canceling Techniques” on page 105 on
1477K–AVR–08/10

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