AT43USB355M-AC ATMEL [ATMEL Corporation], AT43USB355M-AC Datasheet - Page 59

• Manufacturer Part Number: AT43USB355M-AC
• Description: Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
• Manufacturer: ATMEL [ATMEL Corporation]

Analog-to-digital
Converter
Figure 22. Analog-to-digital Converter Block Schematic
2603G–USB–04/06
Analog
Inputs
VREF
8-bit Data Bus
Feature list:
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The AT43USB355 features a 10-bit successive approximation ADC. The ADC is connected to
a 12-channel Analog Multiplexer to pins AD0 – AD11. The ADC contains a Sample and Hold
Amplifier that ensures that the input voltage to the ADC is held at a constant level during con-
version. A block diagram of the ADC is shown in Figure 22.
An external reference voltage must be applied to the V
range between 2.4V and the VCEXTA voltage.
10-bit Resolution
4 LSB Integral Non-linearity
±2 LSB Absolute Accuracy
12 – 768 µs Conversion Time
Up to 83 kSPS at Maximum Resolution
12 Multiplexed Input Channels
Rail-to-rail Input Range
Free Running or Single Conversion Mode
Interrupt on ADC Conversion Complete
10-bit DAC
+
-
Select (ADMUX)
ADC Multiplexer
Sample and Hold
Comparator
ADC Ctrl and Staus
Register (ADCSR)
ADC Conversion
Complete IRQ
Conversion Logic
Prescaler
15
REF
ADC Data Register
(ADCH/ADCL)
pin. This voltage must be in the
AT43USB355
0
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