ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 425

• 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

8266B-MCU Wireless-03/11
For single ended conversion, the result is
where V
reference (see
represents analog ground, and 0x3FF represents the selected reference voltage minus
one LSB.
If differential channels are used, the result is
where V
input pin, and V
complement form, from 0x200 (-512d) through 0x1FF (+511d). Note that if the user
wants to perform a quick polarity check of the result, it is sufficient to read the MSB of
the result (ADC9 in ADCH). If the bit is one, the result is negative, and if this bit is zero,
the result is positive.
range.
Table 27-7 on
channel pair (ADCn - ADCm) is selected with a gain of GAIN and a reference voltage of
V
Figure 27-16. Differential Measurement Range
REF
.
- V
REF
/GAIN
POS
IN
is the voltage on the selected input pin and V
is the voltage on the positive input pin, V
"Table 27-10" on page 428
page 426 shows the resulting output codes if the differential input
REF
the selected voltage reference. The result is presented in two’s
Figure 27-16 below
ADC
Output code
0x3FF
=
(
0x1FF
ADC
0x000
V
POS
0
0x200
−
=
V
V
shows the decoding of the differential input
NEG
IN
V
V
and
⋅
REF
REF
1024
)
⋅
GAIN
"Table 27-11" on page
ATmega128RFA1
NEG
⋅
512
the voltage on the negative
REF
V
the selected voltage
REF
/GAIN Differential Input
voltage (Volts)
429). 0x000
425