MSP430F2012IN datasheet(42/91 Pages) TI

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MSP430F20x3

MSP430F20x2

MSP430F20x1

SLAS491G

– AUGUST 2005 – REVISED APRIL 2011

www.ti.com

10-Bit ADC, Linearity Parameters (MSP430F20x2)

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

Integral linearity error

2.2 V/3 V

±1

LSB

Differential linearity error

2.2 V/3 V

±1

LSB

Offset error

Source impedance RS < 100 Ω

2.2 V/3 V

±1

LSB

Gain error

2.2 V/3 V

±1.1

±2

LSB

Total unadjusted error

2.2 V/3 V

±2

±5

LSB

10-Bit ADC, Temperature Sensor and Built-In VMID (MSP430F20x2)

(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

120

Temperature sensor supply

REFON = 0, INCHx = 0Ah,

ISENSOR

µA

current(1)

TA = 25°C

3 V

160

TCSENSOR

ADC10ON = 1, INCHx = 0Ah(2)

2.2 V/3 V

3.44

3.55

3.66 mV/

°C

VOffset,Sensor

Sensor offset voltage

ADC10ON = 1, INCHx = 0Ah(2)

-100

100

Temperature sensor voltage at

1265

1365

1465

TA = 105°C (T version only)

Temperature sensor voltage at

1195

1295

1395

TA = 85°C

VSENSOR

Sensor output voltage(3)

2.2 V/3 V

Temperature sensor voltage at

985

1085

1185

TA = 25°C

Temperature sensor voltage at

895

995

1095

TA = 0°C

Sample time required if

ADC10ON = 1, INCHx = 0Ah,

tSENSOR(sample)

2.2 V/3 V

µs

channel 10 is selected(4)

Error of conversion result

≤ 1 LSB

2.2 V

N/A

Current into divider at

IVMID

ADC10ON = 1, INCHx = 0Bh

µA

channel 11(4)

3 V

N/A

2.2 V

1.06

1.1

1.14

ADC10ON = 1, INCHx = 0Bh,

VMID

VCC divider at channel 11

VMID ≈ 0.5 × VCC

3 V

1.46

1.5

1.54

2.2 V

1400

Sample time required if

ADC10ON = 1, INCHx = 0Bh,

tVMID(sample)

channel 11 is selected(5)

Error of conversion result

≤ 1 LSB

3 V

1220

(1)

The sensor current ISENSOR is consumed if (ADC10ON = 1 and REFON = 1), or (ADC10ON = 1 and INCH = 0Ah and sample signal is

high).When REFON = 1, ISENSOR is included in IREF+.When REFON = 0, ISENSOR applies during conversion of the temperature sensor

input (INCH = 0Ah).

(2)

The following formula can be used to calculate the temperature sensor output voltage:

VSensor,typ = TCSensor ( 273 + T [°C] ) + VOffset,sensor [mV] or

VSensor,typ = TCSensor T [°C] + VSensor(TA = 0°C) [mV]

(3)

Results based on characterization and/or production test, not TCSensor or VOffset,sensor.

(4)

No additional current is needed. The VMID is used during sampling.

(5)

The on time, tVMID(on), is included in the sampling time, tVMID(sample); no additional on time is needed.

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