MSP430F6638IPZ datasheet(47/133 Pages) TI

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8.42 12-Bit ADC, Temperature Sensor and Built-In VMID

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)(1)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX UNIT

VSENSOR

Temperature sensor voltage(2)

(see )Figure 8-16

ADC12ON = 1, INCH = 0Ah,

TA = 0°C

2.2 V

680

3 V

680

TCSENSOR

Temperature coefficient of

sensor(2)

ADC12ON = 1, INCH = 0Ah

2.2 V

2.25

mV/°C

3 V

2.25

tSENSOR(sample)

Sample time required if

channel 10 is selected(3)

ADC12ON = 1, INCH = 0Ah,

Error of conversion result ≤ 1 LSB

2.2 V

100

µs

3 V

100

VMID

AVCC divider at channel 11

ADC12ON = 1, INCH = 0Bh,

VMID ≈ 0.5 × VAVCC

2.2 V

1.06

1.1

1.14

3 V

1.46

1.5

1.54

tVMID(sample)

Sample time required if

channel 11 is selected(4)

ADC12ON = 1, INCH = 0Bh,

Error of conversion result ≤ 1 LSB

2.2 V, 3 V

1000

(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. TI recommends a single-point calibration 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.

(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.

Ambient Temperature (°C)

500

550

600

650

700

750

800

850

900

950

1000

-40 -30 -20 -10 0

10 20 30 40 50 60 70 80

Figure 8-16. Typical Temperature Sensor Voltage

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MSP430F6638, MSP430F6637, MSP430F6636, MSP430F6635, MSP430F6634

MSP430F6633, MSP430F6632, MSP430F6631, MSP430F6630

SLAS566G – JUNE 2010 – REVISED SEPTEMBER 2020

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