MSP430F42x

MIXED SIGNAL MICROCONTROLLER

SLAS421 − APRIL 2004

30

POST OFFICE BOX 655303

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

noted) (continued)

SD16, built-in voltage reference

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

VREF

Internal reference

voltage

SD16REFON = 1, SD16VMIDON = 0

3 V

1.14

1.20

1.26

V

IREF

Reference supply

current

SD16REFON = 1, SD16VMIDON = 0

3 V

175

260

µA

TC

Temperature

coefficient

SD16REFON = 1, SD16VMIDON = 0

3 V

20

50

ppm/K

CREF

VREF load

capacitance

SD16REFON = 1, SD16VMIDON = 0 (see Note 1)

100

nF

ILOAD

VREF maximum load

current

SD16REFON = 0

3 V

±200

nA

NOTES:

1. There is no capacitance required on VREF. However, a capacitance of at least 100nF is recommended to reduce any reference

voltage noise.

SD16, built-in reference output buffer

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

VREF,BUF

Reference buffer

output voltage

SD16REFON = 1, SD16VMIDON = 1

3 V

1.2

V

IREF,BUF

Reference Supply +

Reference output

buffer quiescent

current

SD16REFON = 1, SD16VMIDON = 1

3 V

385

600

µA

CREF(O)

Required load

capacitance on

VREF

SD16REFON = 1, SD16VMIDON = 1

470

nF

ILOAD,Max

Maximum load

current on VREF

SD16REFON = 1, SD16VMIDON = 1

3 V

±1

mA

Maximum voltage

variation vs. load

current

|ILOAD| = 0 to 1mA

3 V

−15

+15

mV

SD16, external reference input

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

VREF(I)

Input voltage range

SD16REFON = 0

3 V

1.0

1.25

1.5

V

IREF(I)

Input current

SD16REFON = 0

3 V

50

nA