AT90LS4433-4AC Atmel, AT90LS4433-4AC Datasheet - Page 64

• Manufacturer Part Number: AT90LS4433-4AC
• Description: IC MCU 4K 4MHZ A/D LV 32TQFP
• Manufacturer: Atmel
• Series: AVR® 90LSr

Specifications of AT90LS4433-4AC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Data Converters: A/D 6x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Analog-to-Digital
Converter
Features
64
AT90S/LS4433
•
•
•
•
•
•
•
•
•
•
The AT90S4433 features a 10-bit successive approximation ADC. The ADC is con-
nected to a 6-channel Analog Multiplexer, which allows each pin of Port C to be used as
an input for the ADC. 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 44.
The ADC has two separate analog supply voltage pins: AVCC and AGND. AGND must
be connected to GND, and the voltage on AVCC must not differ from V
±0.3V. See the section “ADC Noise Canceling Techniques” on page 70 for how to con-
nect these pins.
An external reference voltage must be applied to the AREF pin. This voltage must be in
the range 2.0 - AVCC.
Figure 44. Analog-to-Digital Converter Block Schematic
Reference
10-bit Resolution
±2 LSB Absolute Accuracy
0.5 LSB Integral Non-linearity
65 - 260 µs Conversion Time
Up to 15 kSPS
Six Multiplexed Input Channels
Rail-to-Rail Input Range
Free Run or Single Conversion Mode
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
Analog
External
Inputs
Voltage
8-BIT DATA BUS
CHANNEL
MUX
6-
+
10-BIT DAC
-
SAMPLE & HOLD
COMPARATOR
ADC MULTIPLEXER
SELECT (ADMUX)
ADC CTRL & STATUS
ADC CONVERSION
REGISTER (ADCSR)
COMPLETE IRQ
CONVERSION LOGIC
9
ADC DATA REGISTER
(ADCH/ADCL)
CC
1042H–AVR–04/03
more than
0