ATxmega32D4 Atmel Corporation, ATxmega32D4 Datasheet - Page 224

• Manufacturer Part Number: ATxmega32D4
• Manufacturer: Atmel Corporation

Specifications of ATxmega32D4

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Speed: No
• Usb Interface: No
• Spi: 4
• Twi (i2c): 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 200
• Analog Comparators: 2
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 14
• Input Capture Channels: 14
• Pwm Channels: 14
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

20. ADC - Analog to Digital Converter
20.1
20.2
8210B–AVR–04/10
Features
Overview
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The ADC converts analog voltages to digital values. The ADC has 12-bit resolution and is capa-
ble of converting up to 200K samples per second. The input selection is flexible, and both single-
ended and differential measurements can be done. For differential measurements an optional
gain stage is available to increase the dynamic range. In addition several internal signal inputs
are available. The ADC can provide both signed and unsigned results.
ADC measurements can either be started by application software or an incoming event from
another peripheral in the device. The latter ensure the ADC measurements can be started with
predictable timing, and without software intervention. The ADC has one channel, meaning there
is one input selection (MUX selection) and one result register available.
Both internal and external analog reference voltages can be used. A very accurate internal
1.00V reference is available.
An integrated temperature sensor is available and the output from this can be measured with the
ADC. A VCC/10 signal and the Bandgap voltage can also be measured by the ADC.
12-bit resolution
Up to 200 Ksps conversion rate
Single-ended or Differential measurements
Signed and Unsigned mode
8 - 16 single-ended inputs
8x4 differential inputs without gain
8x4 differential input with gain
3 internal inputs
1x, 2x, 4x, 8x, 16x, 32x or 64x software selectable gain
8-, or 12-bit selectable resolution
Minimum single result propagation delay of 4.25µs with 8-bit resolution
Minimum single result propagation delay of 5.0µs with 12-bit resolution
Built-in accurate reference
Optional external reference
Optional event triggered conversion for accurate timing
Optional interrupt/event on compare result
– Temperature Sensor
– VCC voltage divided by 10
– Bandgap voltage
XMEGA D
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