Datasheet

MSP430F42x0
MIXED SIGNAL MICROCONTROLLER
SLAS455D − MARCH 2005 − REVISED APRIL 2007
30
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
SD16_A, temperature sensor
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
TC
Sensor
Sensor temperature
coefficient
1.18 1.32 1.46 mV/K
V
Offset,sensor
Sensor offset voltage −100 100 mV
Sttlt
Temperature sensor voltage at T
A
= 85°C 3 V 435 475 515
V
Sensor
Sensor output voltage
(see Note 2)
Temperature sensor voltage at T
A
= 25°C 3 V 355 395 435
mV
V
Sensor
(
see
N
o
t
e
2)
Temperature sensor voltage at T
A
= 0°C 3 V 320 360 400
mV
NOTES: 1. The following formula can be used to calculate the temperature sensor output voltage:
V
Sensor,typ
= TC
Sensor
( 273 + T [°C] ) + V
Offset,sensor
[mV]
2. Results based on characterization and/or production test, not TC
Sensor
or V
Offset,sensor
.
SD16_A, 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 18 50 ppm/K
C
REF
V
REF
load capacitance SD16REFON = 1, SD16VMIDON = 0 (see Note 1) 100 nF
I
LOAD
V
REF(I)
maximum load
current
SD16REFON = 1, SD16VMIDON = 0 3 V ±200 nA
t
ON
Turn on time
SD16REFON = 0−>1, SD16VMIDON = 0,
C
REF
= 100nF
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 100 uV/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_A, 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 varia-
tion 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
= 470nF
3 V 100 μs