参数资料
型号: EFM32G840F128
厂商: Energy Micro
文件页数: 30/69页
文件大小: 0K
描述: IC MCU 32BIT 128KB FLASH 64QFN
特色产品: EFM32 Gecko
标准包装: 1
系列: Gecko
核心处理器: ARM? Cortex?-M3
芯体尺寸: 32-位
速度: 32MHz
连通性: EBI/EMI,I²C,IrDA,智能卡,SPI,UART/USART
外围设备: 欠压检测/复位,DMA,LCD,POR,PWM,WDT
输入/输出数: 56
程序存储器容量: 128KB(128K x 8)
程序存储器类型: 闪存
RAM 容量: 16K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 3.8 V
数据转换器: A/D 8x12b,D/A 2x12b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 标准包装
其它名称: 914-1015-6
...the world's most energy friendly microcontrollers
2013-06-28 - EFM32G840FXX - d0008_Rev1.60
36
www.energymicro.com
Symbol
Parameter
Condition
Min
Typ
Max
Unit
200 kSamples/s, 12 bit, differ-
ential, VDD reference
79
dBc
200 kSamples/s, 12 bit, differ-
ential, 2xVDD reference
79
dBc
After calibration, single ended
0.3
mV
VADCOFFSET
Offset voltage
After calibration, differential
0.3
mV
-1.92
mV/°C
TGRADADCTH
Thermometer output gradi-
ent
-6.3
ADC
Codes/
°C
DNLADC
Differential non-linearity
(DNL)
±0.7
LSB
INLADC
Integral non-linearity (INL),
End point method
±1.2
LSB
MCADC
No missing codes
11.999
1
12
bits
1On the average every ADC will have one missing code, most likely to appear around 2048 +/- n*512 where n can be a value in
the set {-3, -2, -1, 1, 2, 3}. There will be no missing code around 2048, and in spite of the missing code the ADC will be monotonic
at all times so that a response to a slowly increasing input will always be a slowly increasing output. Around the one code that is
missing, the neighbour codes will look wider in the DNL plot. The spectra will show spurs on the level of -78dBc for a full scale
input for chips that have the missing code issue.
The integral non-linearity (INL) and differential non-linearity parameters are explained in Figure 3.25 (p.
36) and Figure 3.26 (p. 37) , respectively.
Figure 3.25. Integral Non-Linearity (INL)
Ideal t ransfer
curve
Digit al ouput code
Analog Input
INL= |[ (VD-VSS)/VLSBIDEAL] - D| where 0 < D < 2
N - 1
0
1
2
3
4092
4093
4094
4095
VOFFSET
Act ual ADC
t ranfer funct ion
before offset and
gain correct ion
Act ual ADC
t ranfer funct ion
aft er offset and
gain correct ion
INL Error
(End Point INL)
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