Datasheet
MSP430F532x
SLAS678D –AUGUST 2010–REVISED FEBRUARY 2013
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12-Bit ADC, Linearity Parameters Using an External Reference Voltage or 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
1.4 V ≤ dVREF ≤ 1.6 V
(2)
±2.0
E
I
Integral linearity error
(1)
2.2 V, 3 V LSB
1.6 V < dVREF
(2)
±1.7
E
D
Differential linearity error
(1) (2)
2.2 V, 3 V ±1.0 LSB
dVREF ≤ 2.2 V
(2)
2.2 V, 3 V ±1.0 ±2.0
E
O
Offset error
(3)
LSB
dVREF > 2.2 V
(2)
2.2 V, 3 V ±1.0 ±2.0
E
G
Gain error
(3) (2)
2.2 V, 3 V ±1.0 ±2.0 LSB
dVREF ≤ 2.2 V
(2)
2.2 V, 3 V ±1.4 ±3.5
E
T
Total unadjusted error LSB
dVREF > 2.2 V
(2)
2.2 V, 3 V ±1.4 ±3.5
(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 MSP430x5xx and MSP430x6xx
Family User's Guide (SLAU208).
(3) Parameters are derived using a best fit curve.
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 -1.0 +2.0
Differential
E
D
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 2.7 MHz 2.2 V, 3 V -1.0 +1.5 LSB
linearity error
(2)
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz -1.0 +2.5
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 4.0 MHz ±1.0 ±2.0
E
O
Offset error
(3)
2.2 V, 3 V LSB
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±1.0 ±2.0
ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 4.0 MHz ±1.0 ±2.0 LSB
E
G
Gain error
(3)
2.2 V, 3 V
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±1.5%
(4)
VREF
Total ADC12SR = 0, REFOUT = 1 f
ADC12CLK
≤ 4.0 MHz ±1.4 ±3.5 LSB
E
T
unadjusted 2.2 V, 3 V
ADC12SR = 0, REFOUT = 0 f
ADC12CLK
≤ 2.7 MHz ±1.5%
(4)
VREF
error
(1) The internal reference voltage is selected by: SREF2 = 0 or 1, SREF1 = 1, 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 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.
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