Datasheet

MSP430F42x
MIXED SIGNAL MICROCONTROLLER
SLAS421A − APRIL 2004 − REVISED JUNE 2007
30
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
SD16, built-in voltage reference
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
REF
Internal reference
voltage
SD16REFON = 1, SD16VMIDON = 0 3 V 1.14 1.20 1.26 V
I
REF
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
C
REF
V
REF
load
capacitance
SD16REFON = 1, SD16VMIDON = 0 (see Note 1) 100 nF
I
LOAD
V
REF
maximum load
current
SD16REFON = 0 3 V ±200 nA
t
ON
Turn-on time SD16REFON = 0 → 1, SD16VMIDON = 0, C
REF
= 100 nF 3 V 5 ms
DC PSR
DC power supply
rejection,
ΔV
REF
/ΔV
CC
SD16REFON = 1, SD16VMIDON = 0, V
CC
= 2.5 V to 3.6 V 200 μV/V
NOTES: 1. There is no capacitance required on V
REF
. However, a capacitance of at least 100nF is recommended to reduce any reference
voltage noise.
SD16, built-in reference output buffer
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
REF,BUF
Reference buffer
output voltage
SD16REFON = 1, SD16VMIDON = 1 3 V 1.2 V
I
REF,BUF
Reference Supply +
Reference output
buffer quiescent
current
SD16REFON = 1, SD16VMIDON = 1 3 V 385 600 μA
C
REF(O)
Required load
capacitance on
V
REF
SD16REFON = 1, SD16VMIDON = 1 470 nF
I
LOAD,Max
Maximum load
current on V
REF
SD16REFON = 1, SD16VMIDON = 1 3 V ±1 mA
Maximum voltage
variation vs. load
current
|I
LOAD
| = 0 to 1mA 3 V −15 +15 mV
t
ON
Turn-on time SD16REFON = 0 → 1, SD16VMIDON = 1, C
REF
= 470 nF 3 V 100 μs
SD16, external reference input
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
REF(I)
Input voltage range SD16REFON = 0 3 V 1.0 1.25 1.5 V
I
REF(I)
Input current SD16REFON = 0 3 V 50 nA