MSP430F2012IN datasheet(40/91 Pages) TI

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MSP430F20x3

MSP430F20x2

MSP430F20x1

SLAS491G

– AUGUST 2005 – REVISED APRIL 2011

www.ti.com

10-Bit ADC, Built-In Voltage Reference (MSP430F20x2)

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

IVREF+ ≤ 1 mA, REF2_5V = 0

2.2

Positive built-in

VCC,REF+

reference analog

IVREF+ ≤ 0.5 mA, REF2_5V = 1

2.8

supply voltage range

IVREF+ ≤ 1 mA, REF2_5V = 1

2.9

IVREF+ ≤ IVREF+max, REF2_5V = 0

2.2 V/3 V

1.41

1.5

1.59

Positive built-in

VREF+

reference voltage

IVREF+ ≤ IVREF+max, REF2_5V = 1

3 V

2.35

2.5

2.65

2.2 V

±0.5

Maximum VREF+ load

ILD,VREF+

current

3 V

±1

IVREF+ = 500 µA ± 100 µA,

Analog input voltage VAx ≈ 0.75 V,

2.2 V/3 V

±2

REF2_5V = 0

VREF+ load regulation

LSB

IVREF+ = 500 µA ± 100 µA,

Analog input voltage VAx ≈ 1.25 V,

3 V

±2

REF2_5V = 1

IVREF+ = 100 µA to 900 µA,

ADC10SR = 0

400

VREF+ load regulation

VAx ≈ 0.5 x VREF+,

3 V

response time

Error of conversion result

ADC10SR = 1

2000

≤1 LSB

Maximum capacitance

IVREF+ ≤ ±1 mA,

CVREF+

2.2 V/3 V

100

at pin VREF+

(1)

REFON = 1, REFOUT = 1

Temperature

IVREF+ = constant with

TCREF+

2.2 V/3 V

±100

ppm/

°C

coefficient

0 mA

≤ IVREF+ ≤ 1 mA

Settling time of internal

IVREF+ = 0.5 mA, REF2_5V = 0,

tREFON

3.6 V

µs

reference voltage(2)

REFON = 0 to 1

IVREF+ = 0.5 mA,

ADC10SR = 0

REF2_5V = 0,

2.2 V

REFON = 1,

ADC10SR = 1

2.5

REFBURST = 1

Settling time of

tREFBURST

µs

reference buffer(2)

IVREF+ = 0.5 mA,

ADC10SR = 0

REF2_5V = 1,

3 V

REFON = 1,

ADC10SR = 1

4.5

REFBURST = 1

(1)

The capacitance applied to the internal buffer operational amplifier, if switched to terminal P1.4/SMCLK/A4/VREF+/VeREF+/TCK

(REFOUT = 1), must be limited; otherwise, the reference buffer may become unstable.

(2)

The condition is that the error in a conversion started after tREFON or tRefBuf is less than ±0.5 LSB.

MSP430F2012IN 数据表(PDF) 40 Page - Texas Instruments

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