参数资料
型号: ST7FLITE09Y0B3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP16
封装: 0.300 INCH, PLASTIC, DIP-16
文件页数: 7/115页
文件大小: 781K
代理商: ST7FLITE09Y0B3
ST7FLITE0
104/115
ADC CHARACTERISTICS (Cont’d)
Figure 90. ADC Accuracy Characteristics with Amplifier enabled
Note: When the AMPSEL bit in the ADCDRL register is set, it is mandatory that fADC be less than or equal
to 2 MHz. (if fCPU=8MHz. then SPEED=0, SLOW=1).
Notes:
1) Data based on characterization results over the whole temperature range, not tested in production.
2) For precise conversion results it is recommended to calibrate the amplifier at the following two points:
– offset at VINmin =0V
– gain at full scale (for example VIN=250mV)
3) Monotonicity guaranteed if VIN increases or decreases in steps of min. 5mV.
EO
EG
1LSBIDEAL
Vin (LSBIDEAL)
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
ET=Total Unadjusted Error: maximum deviation
between the actual and the ideal transfer curves.
EO=Offset Error: deviation between the first actual
transition and the first ideal one.
EG=Gain Error: deviation between the last ideal
transition and the last actual one.
ED=Differential Linearity Error: maximum deviation
between actual steps and the ideal one.
EL=Integral Linearity Error: maximum deviation
between any actual transition and the end point
correlation line.
n=Amplifier Offset
Digital Result ADCDR
n+5
n+4
n+3
n+2
n+1
0
n+7
n+6
123
45
67
100 101 102 103
(1)
(2)
ET
ED
EL
(3)
250 mV
VSS
1LSB
IDE AL
V
DD A
V
SSA
103
8
×
--------------------------------------
=
Symbol
Parameter
Condit ions
Min
Typ
Max
Unit
VDD(AMP)
Amplifier operating voltage
4.5
5.5
V
VIN
Amplifier input voltage
VDD=5V
0
250
mV
VOFFSET
Amplifier offset voltage
200
mV
VSTEP
Step size for monotonicity3)
5mV
Linearity
Output Voltage Response
Linear
Gain factor
Amplified Analog input Gain2)
71)
891)
Vmax
Output Linearity Max Voltage
VINmax = 250mV,
VDD=5V
2.05
2.2
2.4
V
Vmin
Output Linearity Min Voltage
01)
0.22
0.25
V
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