MSP430F663x
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SLAS566C –JUNE 2010–REVISED AUGUST 2012
12-Bit ADC, Linearity Parameters Using AVCC as Reference Voltage (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
Offset error(3)
Gain error(3)
TEST CONDITIONS
VCC
MIN
TYP
±1
MAX UNIT
±2 LSB
±4 LSB
±5 LSB
(2)
(2)
(2)
EO
EG
ET
See
See
See
2.2 V, 3 V
2.2 V, 3 V
2.2 V, 3 V
±2
Total unadjusted error
±2
(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)
VCC
MIN
TYP
MAX UNIT
ADC12SR = 0, REFOUT = 1
f
f
f
f
f
f
f
f
f
f
f
ADC12CLK ≤ 4.0 MHz
±1.7
LSB
±2.5
Integral
EI
2.2 V, 3 V
linearity error(2)
ADC12SR = 0, REFOUT = 0
ADC12SR = 0, REFOUT = 1
ADC12SR = 0, REFOUT = 1
ADC12SR = 0, REFOUT = 0
ADC12SR = 0, REFOUT = 1
ADC12SR = 0, REFOUT = 0
ADC12SR = 0, REFOUT = 1
ADC12SR = 0, REFOUT = 0
ADC12SR = 0, REFOUT = 1
ADC12SR = 0, REFOUT = 0
ADC12CLK ≤ 2.7 MHz
ADC12CLK ≤ 4.0 MHz
ADC12CLK ≤ 2.7 MHz
ADC12CLK ≤ 2.7 MHz
ADC12CLK ≤ 4.0 MHz
ADC12CLK ≤ 2.7 MHz
ADC12CLK ≤ 4.0 MHz
ADC12CLK ≤ 2.7 MHz
ADC12CLK ≤ 4.0 MHz
ADC12CLK ≤ 2.7 MHz
-1
-1
+1.5
Differential
ED
2.2 V, 3 V
±1 LSB
+2.5
linearity error(2)
±2
±2
±1
±4
EO
EG
ET
Offset error(3)
Gain error(3)
2.2 V, 3 V
2.2 V, 3 V
2.2 V, 3 V
LSB
±4
±2.5 LSB
±1%(4) VREF
±5 LSB
±2
Total unadjusted
error
±1%(4) VREF
(1) The external reference voltage is selected by: SREF2 = 0, SREF1 = 0, SREF0 = 1. dVREF = VR+ - VR-
.
(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.
12-Bit ADC, Temperature Sensor and Built-In VMID
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
2.2 V
3 V
MIN
TYP
680
680
2.25
2.25
MAX UNIT
ADC12ON = 1, INCH = 0Ah,
TA = 0°C
(1)
VSENSOR
See
mV
2.2 V
3 V
TCSENSOR
ADC12ON = 1, INCH = 0Ah
mV/°C
µs
2.2 V
3 V
100
100
Sample time required if
ADC12ON = 1, INCH = 0Ah,
Error of conversion result ≤ 1 LSB
tSENSOR(sample)
channel 10 is selected(2)(3)
2.2 V
3 V
1.06
1.46
1.1
1.5
1.14
V
ADC12ON = 1, INCH = 0Bh,
VMID is approximately 0.5 × VAVCC
VMID
AVCC divider at channel 11
1.54
Sample time required if
channel 11 is selected(4)
ADC12ON = 1, INCH = 0Bh,
Error of conversion result ≤ 1 LSB
tVMID(sample)
2.2 V, 3 V
1000
ns
(1) The temperature sensor is provided by the REF module. See the REF module parametric, IREF+, regarding the current consumption of
the temperature sensor.
(2) The temperature sensor offset can be significant. A single-point calibration is recommended to minimize the offset error of the built-in
temperature sensor. The TLV structure contains calibration values for 30°C ± 3°C and 85°C ± 3°C for each of the available reference
voltage levels. The sensor voltage can be computed as VSENSE = TCSENSOR × (Temperature,°C) + VSENSOR, where TCSENSOR and
VSENSOR can be computed from the calibration values for higher accuracy. See also the MSP430F5xx and MSP430F6xx Family User's
Guide (SLAU208).
(3) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time tSENSOR(on)
.
(4) The on-time tVMID(on) is included in the sampling time tVMID(sample); no additional on time is needed.
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