MSP430F5529 datasheet(71/115 Pages) TI

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AmbientTemperature- ˚C

MSP430F551x

MSP430F552x

www.ti.com

SLAS590D – OCTOBER 2009 – REVISED APRIL 2010

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

(1)

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

2.2 V

680

ADC12ON = 1, INCH = 0Ah,

VSENSOR

See (2)

TA = 0°C

3 V

680

2.2 V

2.25

TCSENSOR

ADC12ON = 1, INCH = 0Ah

mV/°C

3 V

2.25

2.2 V

Sample time required if

ADC12ON = 1, INCH = 0Ah,

tSENSOR(sample)

µs

channel 10 is selected(3)

Error of conversion result

≤ 1 LSB

3 V

AVCC divider at channel 11,

ADC12ON = 1, INCH = 0Bh

0.48

0.5

0.52 VAVCC

VAVCC factor

VMID

2.2 V

1.06

1.1

1.14

AVCC divider at channel 11

ADC12ON = 1, INCH = 0Bh

3 V

1.44

1.5

1.56

Sample time required if

ADC12ON = 1, INCH = 0Bh,

tVMID(sample)

2.2 V/3 V

1000

channel 11 is selected(4)

Error of conversion result

≤ 1 LSB

(1)

The temperature sensor is provided by the REF module. Please refer to the REF module parametric, IREF+, 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 in order 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 MSP430x5xx Family User's Guide

(SLAU208).

(3)

The typical equivalent impedance of the sensor is 51 k

Ω. 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.

Figure 16. Typical Temperature Sensor Voltage

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