Datasheet

MSP430F6638, MSP430F6637, MSP430F6636
MSP430F6635, MSP430F6634, MSP430F6633
MSP430F6632, MSP430F6631, MSP430F6630
www.ti.com SLAS566D –JUNE 2010–REVISED AUGUST 2013
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 TEST CONDITIONS V
CC
MIN TYP MAX UNIT
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
(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 +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.
12-Bit ADC, Temperature Sensor and Built-In V
MID
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
2.2 V 680
ADC12ON = 1, INCH = 0Ah,
V
SENSOR
See
(1)
mV
T
A
= 0°C
3 V 680
2.2 V 2.25
TC
SENSOR
ADC12ON = 1, INCH = 0Ah mV/°C
3 V 2.25
2.2 V 100
Sample time required if ADC12ON = 1, INCH = 0Ah,
t
SENSOR(sample)
µs
channel 10 is selected
(2)(3)
Error of conversion result ≤ 1 LSB
3 V 100
2.2 V 1.06 1.1 1.14
ADC12ON = 1, INCH = 0Bh,
V
MID
AV
CC
divider at channel 11 V
V
MID
is approximately 0.5 × V
AVCC
3 V 1.46 1.5 1.54
Sample time required if ADC12ON = 1, INCH = 0Bh,
t
VMID(sample)
2.2 V, 3 V 1000 ns
channel 11 is selected
(4)
Error of conversion result ≤ 1 LSB
(1) The temperature sensor is provided by the REF module. See the REF module parametric, I
REF+
, 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 V
SENSE
= TC
SENSOR
× (Temperature,°C) + V
SENSOR
, where TC
SENSOR
and
V
SENSOR
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 t
SENSOR(on)
.
(4) The on-time t
VMID(on)
is included in the sampling time t
VMID(sample)
; no additional on time is needed.
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