MSP430F5259 datasheet(71/107 Pages) TI1

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MSP430F5259, MSP430F5258, MSP430F5257, MSP430F5256

MSP430F5255, MSP430F5254, MSP430F5253, MSP430F5252

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SLAS903A – MAY 2013 – REVISED JULY 2013

REF, Built-In Reference

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

(1)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

REFVSEL = {2} for 2.5 V

3 V

2.445

2.486

2.527

REFON = 1

REFVSEL = {1} for 2.0 V

Positive built-in reference

VREF+

3 V

1.94

1.97

2.01

voltage

REFON = 1

REFVSEL = {0} for 1.5 V

2.2 V, 3 V

1.461

1.485

1.511

REFON = 1

REFVSEL = {0} for 1.5 V

2.2

AVCC minimum voltage,

AVCC(min)

Positive built-in reference

REFVSEL = {1} for 2.0 V

2.2

active

REFVSEL = {2} for 2.5 V

2.7

fADC10CLK = 5.0 MHz

REFON = 1, REFBURST = 0,

3 V

µA

REFVSEL = {2} for 2.5 V

fADC10CLK = 5.0 MHz

Operating supply current

IREF+

REFON = 1, REFBURST = 0,

3 V

15.5

µA

into AVCC terminal(2)

REFVSEL = {1} for 2.0 V

fADC10CLK = 5.0 MHz

REFON = 1, REFBURST = 0,

3 V

13.5

µA

REFVSEL = {0} for 1.5 V

IVREF+ = 0 A

Temperature coefficient of

ppm/

TCREF+

built-in reference(3)

°C

REFVSEL = (0, 1, 2}, REFON = 1

2.2 V

REFON = 0, INCH = 0Ah,

Operating supply current

ISENSOR

µA

into AVCC terminal(4)

ADC10ON = N/A, TA = 30°C

3 V

2.2 V

770

ADC10ON = 1, INCH = 0Ah,

VSENSOR

See (5)

TA = 30°C

3 V

770

2.2 V

1.06

1.1

1.14

ADC10ON = 1, INCH = 0Bh,

VMID

AVCC divider at channel 11

VMID is approximately 0.5 × VAVCC

3 V

1.46

1.5

1.54

ADC10ON = 1, INCH = 0Ah,

Sample time required if

tSENSOR(sample)

µs

channel 10 is selected(6)

Error of conversion result

≤ 1 LSB

ADC10ON = 1, INCH = 0Bh,

Sample time required if

tVMID(sample)

µs

channel 11 is selected(7)

Error of conversion result

≤ 1 LSB

AVCC = AVCC (min) - AVCC(max),

Power supply rejection ratio

PSRR_DC

TA = 25°C,

120

µV/V

(dc)

REFVSEL = (0, 1, 2}, REFON = 1

AVCC = AVCC (min) - AVCC(max),

TA = 25°C,

Power supply rejection ratio

PSRR_AC

6.4

mV/V

(ac)

f = 1 kHz,

ΔVpp = 100 mV,

REFVSEL = (0, 1, 2}, REFON = 1

AVCC = AVCC (min) - AVCC(max),

Settling time of reference

tSETTLE

µs

voltage(8)

REFVSEL = (0, 1, 2}, REFON = 0

→ 1

(1)

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

(2)

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

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

(3)

Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C)/(85°C – (–40°C)).

(4)

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 already included in IREF+.

(5)

The temperature sensor offset can be significant. A single-point calibration is recommended to minimize the offset error of the built-in

temperature sensor.

(6)

The typical equivalent impedance of the sensor is 51 k

Ω. The sample time required includes the sensor-on time tSENSOR(on).

(7)

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

(8)

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

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