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
μ
A
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,
Δ
V
REF
/
Δ
V
CC
SD16REFON = 1, SD16VMIDON = 0, V
CC
= 2.5 V to 3.6 V
200
μ
V/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
Reference output
buffer quiescent
current
SD16REFON = 1, SD16VMIDON = 1
3 V
385
600
μ
A
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
μ
s
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
