CC430F6137_14 Datasheet, PDF (66/120 Pages) Texas Instruments – MSP430™ SoC With RF Core

ECCN 5E002 TSPA - Technology / Software Publicly Available
CC430F6137, CC430F6135, CC430F6127, CC430F6126, CC430F6125
CC430F5137, CC430F5135, CC430F5133
SLAS554H – MAY 2009 – REVISED SEPTEMBER 2013
www.ti.com
12-Bit ADC, Temperature Sensor and Built-In V_MID(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_SENSOR
PARAMETER
See ^{(2) (3)}
TEST CONDITIONS
ADC12ON = 1, INCH = 0Ah,
T_A = 0°C
V_CC
2.2 V
3V
MIN TYP
680
680
TC_SENSOR
See ⁽³⁾
2.2 V
2.25
ADC12ON = 1, INCH = 0Ah
3V
2.25
t_{SENSOR(sample)}
Sample time required if
channel 10 is selected⁽⁴⁾
ADC12ON = 1, INCH = 0Ah,
2.2 V
30
Error of conversion result ≤ 1 LSB
3V
30
V_MID
AV_CC divider at channel 11,
V_AVCC factor
AV_CC divider at channel 11
ADC12ON = 1, INCH = 0Bh
ADC12ON = 1, INCH = 0Bh
2.2 V
3V
0.48 0.5
1.06 1.1
1.44 1.5
t_VMID(sample)
Sample time required if
channel 11 is selected⁽⁵⁾
ADC12ON = 1, INCH = 0Bh,
Error of conversion result ≤ 1 LSB
2.2 V, 3 V 1000
MAX UNIT
mV
mV/°C
µs
0.52 V_AVCC
1.14
V
1.56
ns
(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 as much as ±20°C. A single-point calibration is recommended to minimize the offset error of the
built-in temperature sensor.
(3) The device descriptor 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.
(4) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t_SENSOR(on).
(5) The on-time t_VMID(on) is included in the sampling time t_VMID(sample); no additional on time is needed.
1000
950
900
850
800
750
700
650
600
550
500
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Ambient Temperature - ˚C
Figure 20. Typical Temperature Sensor Voltage
66
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