ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 411

• Manufacturer Part Number: ATMEGA128RFA1-ZU
• Description: IC AVR MCU 2.4GHZ XCEIVER 64QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA128RFA1-ZU

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3.5dBm
• Sensitivity: -100dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.5mA
• Current - Transmitting: 14.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB Flash, 4kB EEPROM, 16kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Rf Ic Case Style: QFN
• No. Of Pins: 64
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 16 KB
• Interface Type: JTAG
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 6
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVR128RFA1-EK1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 27-1. Analog to Digital Converter Block Schematic
27.2 Operation
TEM PE RA TURE
8266A-MCU Wireless-12/09
DRT VO LTA GE
AD C[7:0]
REFERENCE
REFERE NCE
INTERNAL
(1.5V/1.6V)
BA NDGAP
S ENS OR
8-BIT D ATABU S
AVD D
SRAM 2
AREF
AVSS
1.2V
ADC[2:0]
ADC MULTIPLEXER
SELECT (ADMU X)
M UX D EC ODER
The Power Reduction ADC bit, PRADC (see
page
The ADC converts an analog input voltage to a 10-bit digital value through successive
approximation. The minimum value represents 0V (conversion result 0x000) and the
maximum value in single ended mode represents the reference voltage minus 1 LSB
(conversion result 0x3FF). The reference voltage can be measured at the AREF pin.
The internal, generated reference voltage can have the values 1.5V, 1.6V or AVDD
where the 1.6V has the highest absolute accuracy. The reference voltage is selected by
writing to the REFSn bits in the ADMUX Register. An external reference voltage can
also be selected. Such an external voltage must be supplied with a very low impedance
R
(see
dependent and changes in the course of the successive approximation process (load
current steps). The internal voltage reference (except AVDD) must not be decoupled by
an external capacitor. Adding unnecessary external capacitance at the AREF pin will
AREF,EXT
R EGISTER B (ADC SR B)
AD C CTRL & STATUS
"ADC Electrical Characteristics" on page
167) must be disabled by writing a logical zero to enable the ADC.
AMPLIFIER
GAIN
(see
"ADC Electrical Characteristics" on page
CLAMP
REG ISTER C (ADC SR C)
AD C C TRL & STATU S
10-bit DAC
REGISTER A (AD CSR A)
AD C C TRL & STATUS
C ON VER SION LOGIC
AD C ON VER SION
C OMPLETE IRQ
"PRR0 – Power Reduction Register0" on
505) seen by the external source is code
PR ESC ALER
AD C
MULTIPLEXER
OUTPUT
SAMPLE & H OLD
ATmega128RFA1
CO MPARATOR
505). The load current I
STA RT
ADTS [2:0]
TRIGGER
SELECT
INTE RRUP T
FLAGS
15
AD C DATA R EG ISTER
(ADC H/AD CL)
L,AREF
411
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