MSP430A005IPWR datasheet(25/47 Pages) TI

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MSP430x11x2, MSP430x12x2

MIXED SIGNAL MICROCONTROLLER

SLAS361D − JANUARY 2002 − REVISED AUGUST 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

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

noted) (continued)

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

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

VCC

Analog supply voltage

VSS = 0 V

2.2

3.6

V(P6.x/Ax)

Analog input voltage

range (see Note 2)

All Ax terminals. Analog inputs

selected in ADC10AE register and PxSel.x=1

VSS ≤ VPx.x/Ax ≤ VCC

VCC

Operating supply current

fADC10CLK = 5.0 MHz

ADC10ON = 1, REFON = 0

VCC = 2.2 V

0.52

1.05

IADC10

into VCC terminal

(see Note 3)

ADC10ON = 1, REFON = 0

ADC10SHT0=1, ADC10SHT1=0,

ADC10DIV=0

VCC = 3 V

0.6

1.2

IREF+

Reference operating

supply current,

reference buffer disabled

(see Note 4)

fADC10CLK = 5.0 MHz

ADC10ON = 0,

REFON = 1, REF2_5V = x;

REFOUT = 0

VCC =

2.2V/3 V

0.25

0.4

Reference buffer

fADC10CLK = 5.0 MHz

ADC10ON = 0,

ADC10SR = 0

1.1

1.4

IREFB

operating supply current

(see Note 4)

ADC10ON = 0,

REFON = 1, REF2_5V = 0

REFOUT = 1

ADC10SR = 1

0.46

0.55

CI †

Input capacitance

Only one terminal can be selected

at one time, Px.x/Ax

VCC = 2.2 V

RI†

Input MUX ON resistance

≤ VAx ≤ VCC

VCC = 3 V

2000

Ω

† Not production tested, limits verified by design

NOTES:

1. The leakage current is defined in the leakage current table with Px.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 IADC10.

4. The internal reference current is supplied via terminal VCC. Consumption is independent of the ADC10ON control bit, unless a

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

10-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

VCC

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

VCC

IVeREF+

Static input current

≤VeREF+ ≤ VCC

2.2 V/3 V

±1

µA

IVREF−/VeREF−

Static input current

≤ VeREF− ≤ VCC

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 10-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.

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