ATmega16M1 Atmel Corporation, ATmega16M1 Datasheet - Page 223
ATmega16M1
Manufacturer Part Number
ATmega16M1
Description
Manufacturer
Atmel Corporation
Specifications of ATmega16M1
Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
27
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Can
1
Lin
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
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
14
Input Capture Channels
1
Pwm Channels
10
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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21. ADC – Analog to Digital Converter
21.1
8209D–AVR–11/10
Features
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The ATmega16M1/32M1/64M1 features a 10-bit successive approximation ADC. The ADC is
connected to an 15-channel Analog Multiplexer which allows eleven single-ended input. The sin-
gle-ended voltage inputs refer to 0V (GND).
The device also supports 3 differential voltage input amplifiers which are equipped with a pro-
grammable gain stage, providing amplification steps of 14dB (5×), 20dB (10×), 26dB (20×), or
32dB (40×) on the differential input voltage before the A/D conversion. On the amplified chan-
nels, 8-bit resolution can be expected.
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
on page
The ADC has a separate analog supply voltage pin, AV
from V
Internal reference voltages of nominally 2.56V or AV
ence may be externally decoupled at the AREF pin by a capacitor for better noise performance.
10-bit Resolution
0.5 LSB Integral Non-linearity
±2 LSB Absolute Accuracy
8µs - 250µs Conversion Time
Up to 120 kSPS at Maximum Resolution
11 Multiplexed Single Ended Input Channels
3 Differential input channels with accurate (5%) programmable gain 5, 10, 20 and 40
Optional Left Adjustment for ADC Result Readout
0 - V
Selectable 2.56V 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 Canceler
Temperature Sensor
LiN Address Sense (ISRC Voltage Measurement)
Vcc Voltage Measurement
CC
CC
224.
ADC Input Voltage Range
. See the paragraph
“ADC Noise Canceler” on page 230
ATmega16M1/32M1/64M1
CC
CC
are provided On-chip. The voltage refer-
. AV
CC
must not differ more than ±0.3V
on how to connect this pin.
Figure 21-1
223
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