Texas Instruments MSP430F643 Series, Руководство пользователя

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MSP430F6438, MSP430F6436, MSP430F6435, MSP430F6433
SLAS720D – AUGUST 2010 – REVISED DECEMBER 2015 www.ti.com
5.39 12-Bit ADC, Linearity Parameters Using an External Reference Voltage
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
1.4 V ≤ dVREF ≤ 1.6 V
(2)
±2
Integral
E
I
2.2 V, 3 V LSB
linearity error
(1)
1.6 V < dVREF
(2)
±1.7
Differential
E
D
(2)
2.2 V, 3 V ±1 LSB
linearity error
(1)
dVREF ≤ 2.2 V
(2)
2.2 V, 3 V ±3 ±5.6
E
O
Offset error
(3)
LSB
dVREF > 2.2 V
(2)
2.2 V, 3 V ±1.5 ±3.5
E
G
Gain error
(3) (2)
2.2 V, 3 V ±1 ±2.5 LSB
dVREF ≤ 2.2 V
(2)
2.2 V, 3 V ±3.5 ±7.1
Total unadjusted
E
T
LSB
error
dVREF > 2.2 V
(2)
2.2 V, 3 V ±2 ±5
(1) Parameters are derived using the histogram method.
(2) The external reference voltage is selected by: SREF2 = 0 or 1, SREF1 = 1, SREF0 = 0. dVREF = V
R+
- V
R-
. V
R+
< AVCC. V
R-
> AVSS.
Unless otherwise mentioned, dVREF > 1.5 V. Impedance of the external reference voltage R < 100 Ω , and two decoupling capacitors,
10 µF and 100 nF, should be connected to VREF+/VREF- to decouple the dynamic current. See also the MSP430F5xx and
MSP430F6xx Family User's Guide ( SLAU208 ).
(3) Parameters are derived using a best fit curve.
5.40 12-Bit ADC, Linearity Parameters Using AVCC as Reference Voltage
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
E
I
Integral linearity error
(1)
See
(2)
2.2 V, 3 V ±1.7 LSB
E
D
Differential linearity error
(1)
See
(2)
2.2 V, 3 V ±1 LSB
E
O
Offset error
(3)
See
(2)
2.2 V, 3 V ±1 ±2 LSB
E
G
Gain error
(3)
See
(2)
2.2 V, 3 V ±2 ±4 LSB
E
T
Total unadjusted error See
(2)
2.2 V, 3 V ±2 ±5 LSB
(1) Parameters are derived using the histogram method.
(2) AVCC as reference voltage is selected by: SREF2 = 0, SREF1 = 0, SREF0 = 0.
(3) Parameters are derived using a best fit curve.
5.41 12-Bit ADC, Linearity Parameters Using the Internal Reference Voltage
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS
(1)
V
CC
MIN TYP MAX UNIT
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 4.0 MHz ±1.7
Integral
E
I
2.2 V, 3 V LSB
linearity error
(2)
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±2.5
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤
4.0 MHz -1 +1.5
Differential
E
D
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 2.7 MHz 2.2 V, 3 V ±1 LSB
linearity error
(2)
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz -1 +2.5
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 4.0 MHz ±2 ±4
E
O
Offset error
(3)
2.2 V, 3 V LSB
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±2 ±4
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤
4.0 MHz ±1 ±2.5 LSB
E
G
Gain error
(3)
2.2 V, 3 V
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±1%
(4)
VREF
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 4.0 MHz ±2 ±5 LSB
Total unadjusted
E
T
2.2 V, 3 V
error
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±1%
(4)
VREF
(1) The external reference voltage is selected by: SREF2 = 0, SREF1 = 0, SREF0 = 1. dVREF = V
R+
- V
R-
.
(2) Parameters are derived using the histogram method.
(3) Parameters are derived using a best fit curve.
(4) The gain error and the total unadjusted error are dominated by the accuracy of the integrated reference module absolute accuracy. In
this mode the reference voltage used by the ADC12_A is not available on a pin.
42 Specifications
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