ATZB-24-A2 Atmel, ATZB-24-A2 Datasheet - Page 94

• Manufacturer Part Number: ATZB-24-A2
• Description: KIT MOD 802.15.4/ZIGB 2.4GHZ ANT
• Manufacturer: Atmel

Specifications of ATZB-24-A2

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: Home/Building Automation, Industrial Control and Monitoring
• Power - Output: 3dBm
• Sensitivity: -101dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 19mA
• Current - Transmitting: 18mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kBytes Flash, 8kBytes RAM, 4kBytes EEPROM
• Antenna Connector: On-Board, Chip
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Tool Type: Wireless Development Kit
• Core Architecture: AVR
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Description/function: ZigBit 2.4 GHz Dual Chip Antenna
• Wireless Frequency: 2.4 GHz
• Interface Type: UART, I2C, SPI
• Operating Voltage: 1.8 V to 3.6 V
• Output Power: 3 dBm
• Antenna: Chip Antenna
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8069Q–AVR–12/10
Figure 36-1. Analog Comparator Voltage Scaler vs. Scalefac
3.
4. ADC gain stage output range is limited to 2.4 V
Problem fix/Workaround
Use external voltage input for the analog comparator if accurate voltage levels are needed
ADC has increased INL error for some operating conditions
Some ADC configurations or operating condition will result in increased INL error.
In signed mode INL is increased to:
– 6LSB for sample rates above 1Msps, and up to 8 LSB for 2Msps sample rate.
– 6LSB for reference voltage below 1.1V when VCC is above 3.0V.
– 20LSB for ambient temperature below 0 degree C and reference voltage below 1.3V.
In unsigned mode, the INL error cannot be guaranteed, and this mode should not be used.
Problem fix/Workaround
None, avoid using the ADC in the above configurations in order to prevent increased INL
error. Use the ADC in signed mode also for single ended measurements.
The amplified output of the ADC gain stage will never go above 2.4 V, hence the differential
input will only give correct output when below 2.4 V/gain. For the available gain settings, this
gives a differential input range of:
–
–
–
–
–
–
–
16x
32x
64x
3.5
2.5
1.5
0.5
1x
2x
4x
8x
3
2
1
0
0
T = 25°C
gain:
gain:
gain:
gain:
gain:
gain:
gain:
5
10
300
150
2.4
1.2
0.6
75
38
15
V
V
V
mV
mV
mV
mV
20
25
SCALEFAC
30
35
40
45
50
55
XMEGA A4
60
65
3.3 V
2.7 V
1.8 V
94