AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 189

• Manufacturer Part Number: AT90PWM81-16SN
• Description: IC MCU AVR 8K FLASH ISP 20SOIC
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16SN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SOIC (7.5mm Width)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Timers: 1
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 10 bit, 1 Channel
• Height: 2.35 mm
• Length: 13 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 7.6 mm
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

15. Voltage Reference and Temperature Sensor
15.1
15.2
7734P–AVR–08/10
Features
On Chip voltage Reference and Temperature sensor overview
•
•
•
•
A low power band-gap reference provides AT90PWM81 with an accurate On-chip Bandgap voltage of
1.100 V (Vbg).
Then when SW1 is off and SW2/SW3 is on, the bandgap voltage is multiplied and generates the internal
reference VREF of 2.56V. This reference voltage is used as reference for the ADC, the DAC and can use
a buffer with external decoupling capacitor (when SW0 is on) to enable excellent noise performance with
minimum power consumption as shown on
The selection of the Voltage Reference for all the analog components (ADC, DAC, Comparators) is done
using the REFS1:0 bits in ADMUX register; see
For conditions using the Bandgap and the internal voltage reference, see
Reference Enable Signals and Start-up Time” on page 54
Accurate Voltage Reference of 2.56V
Internal Temperature Sensor
Possibility for Runtime Compensation of Temperature Drift in Both Voltage Reference and On Chip
Oscillators
Low Power Consumption
Figure
“ADC Multiplexer Register – ADMUX” on page
15-1.
“Bandgap and Internal Voltage
AT90PWM81
216.
189