MSP430F449IPZ datasheet(51/79 Pages) TI

51 / 79 page

MSP430x43x1, MSP430x43x, MSP430x44x1, MSP430x44x

MIXED SIGNAL MICROCONTROLLER

SLAS344G − JANUARY 2002 − REVISED OCTOBER 2009

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature (unless otherwise

noted) (continued)

12-bit ADC, power supply and input range conditions (see Note 1)

PARAMETER

TEST CONDITIONS

VCC

MIN

NOM

MAX

UNIT

AVCC

Analog supply voltage

AVCC and DVCC are connected together,

AVSS and DVSS are connected together,

V(AVSS) = V(DVSS) = 0 V

2.2

3.6

V(P6.x/Ax)

Analog input voltage

range (see Note 2)

All P6.0/A0 to P6.7/A7 terminals.

Analog inputs selected in ADC12MCTLx register

and P6Sel.x=1,

≤ x ≤ 7; V(AVSS) ≤ VP6.x/Ax ≤ V(AVCC)

VAVCC

Operating supply current

into AV

terminal

fADC12CLK = 5.0 MHz

ADC12ON

1 REFON

2.2 V

0.65

1.3

IADC12

into AVCC terminal

(see Note 3)

ADC12ON = 1, REFON = 0

SHT0=0, SHT1=0, ADC12DIV=0

3 V

0.8

1.6

Operating supply current

it AV

fADC12CLK = 5.0 MHz

ADC12ON = 0,

REFON = 1, REF2_5V = 1

3 V

0.5

0.8

IREF+

into AVCC terminal

(see Note 4)

fADC12CLK = 5.0 MHz

ADC12ON

2.2 V

0.5

0.8

(see Note 4)

ADC12ON = 0,

REFON = 1, REF2_5V = 0

3 V

0.5

0.8

Input capacitance

Only one terminal can be selected at one time,

P6.x/Ax

2.2 V

Input MUX ON resistance

≤ VAx ≤ VAVCC

3 V

2000

Ω

NOTES:

1. The leakage current is defined in the leakage current table with P6.x/Ax parameter.

2. The analog input voltage range must be within the selected reference voltage range VR+ to VR− for valid conversion results.

3. The internal reference supply current is not included in current consumption parameter IADC12.

4. The internal reference current is supplied via terminal AVCC. Consumption is independent of the ADC12ON control bit, unless a

conversion is active. The REFON bit enables to settle the built-in reference before starting an A/D conversion.

12-bit ADC, external reference (see Note 1)

PARAMETER

TEST CONDITIONS

VCC

MIN

NOM

MAX

UNIT

VeREF+

Positive external

reference voltage input

VeREF+ > VREF−/VeREF− (see Note 2)

1.4

VAVCC

VREF− /VeREF−

Negative external

reference voltage input

VeREF+ > VREF−/VeREF− (see Note 3)

1.2

(VeREF+ −

VREF−/VeREF−)

Differential external

reference voltage input

VeREF+ > VREF−/VeREF− (see Note 4)

1.4

VAVCC

IVeREF+

Static input current

≤VeREF+ ≤ VAVCC

2.2 V/3 V

±1

µA

IVREF−/VeREF−

Static input current

≤ VeREF− ≤ VAVCC

2.2 V/3 V

±1

µA

NOTES:

1. The external reference is used during conversion to charge and discharge the capacitance array. The input capacitance, Ci, is also

the dynamic load for an external reference during conversion. The dynamic impedance of the reference supply should follow the

recommendations on analog-source impedance to allow the charge to settle for 12-bit accuracy.

2. The accuracy limits the minimum positive external reference voltage. Lower reference voltage levels may be applied with reduced

accuracy requirements.

3. The accuracy limits the maximum negative external reference voltage. Higher reference voltage levels may be applied with reduced

accuracy requirements.

4. The accuracy limits minimum external differential reference voltage. Lower differential reference voltage levels may be applied with

reduced accuracy requirements.

MSP430F449IPZ Datasheet(PDF) 51 Page - Texas Instruments

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