SLAS787 datasheet(27/52 Pages) TI2

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MSP430G2231-Q1

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SLAS787B – NOVEMBER 2011 – REVISED MARCH 2014

9.23 10-Bit ADC, Power Supply and Input Range Conditions

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

(1)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

VCC

Analog supply voltage

VSS = 0 V

2.2

3.6

All Ax terminals, Analog inputs

VAx

Analog input voltage(2)

3 V

VCC

selected in ADC10AE register

fADC10CLK = 5.0 MHz,

ADC10ON = 1, REFON = 0,

IADC10

ADC10 supply current(3)

3 V

0.6

1.2

ADC10SHT0 = 1, ADC10SHT1 = 0,

ADC10DIV = 0

fADC10CLK = 5.0 MHz,

ADC10ON = 0, REF2_5V = 0,

0.25

0.4

REFON = 1, REFOUT = 0

Reference supply current,

IREF+

3 V

reference buffer disabled(4)

fADC10CLK = 5.0 MHz,

ADC10ON = 0, REF2_5V = 1,

0.25

0.4

REFON = 1, REFOUT = 0

fADC10CLK = 5.0 MHz,

Reference buffer supply

ADC10ON = 0, REFON = 1,

IREFB,0

3 V

1.1

1.4

current with ADC10SR = 0(4)

REF2_5V = 0, REFOUT = 1,

ADC10SR = 0

fADC10CLK = 5.0 MHz,

Reference buffer supply

ADC10ON = 0, REFON = 1,

IREFB,1

3 V

0.5

0.7

current with ADC10SR = 1(4)

REF2_5V = 0, REFOUT = 1,

ADC10SR = 1

Only one terminal Ax can be selected

Input capacitance

3 V

at one time

Input MUX ON resistance

0 V

≤ VAx ≤ VCC

3 V

1000

2000

Ω

(1)

The leakage current is defined in the leakage current table with Px.y/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.

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