MSP30X11X2 Datasheet, PDF (26/49 Pages) Texas Instruments – MIXED SINGNAL MICROCONTROLLER

MSP430x11x2, MSP430x12x2
MIXED SIGNAL MICROCONTROLLER
SLAS361C − JANUARY 2002 − REVISED DECEMBER 2003
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
10-bit ADC, built-in reference
PARAMETER
TEST CONDITIONS
MIN NOM MAX UNIT
VREF+
VCC(min)
IVREF+
Positive built-in reference
voltage output
VCC minimum voltage,
Positive built-in reference
active
REF2_5V = 1 for 2.5 V
IVREF+ ≤ IVREF+max
REF2_5V = 0 for 1.5 V
IVREF+ ≤ IVREF+max
REF2_5V = 0, IVREF+ ≤ 1mA
REF2_5V = 1, IVREF+ ≤ 0.5mA
REF2_5V = 1, IVREF+ ≤ 1mA
Load current out of VREF+
terminal
3V
2.2 V/3 V
2.2 V
3V
2.35 2.5
1.41 1.5
2.2
VREF+ + 0.15
VREF+ + 0.15
2.65
V
1.59
V
±0.5
mA
±1
IL(VREF)+ ^†
Load-current regulation
VREF+ terminal
IVREF+ = 500 µA +/− 100 µA
Analog input voltage ~0.75 V;
REF2_5V = 0
IVREF+ = 500 µA ± 100 µA
Analog input voltage ~1.25 V;
REF2_5V = 1
2.2 V
3V
3V
±2
LSB
±2
±2 LSB
tDL(VREF) _+‡
Load current regulation
VREF+ terminal
IVREF+ =100 µA → 900 µA,
VCC=3 V, Ax ~0.5 x VREF+
Error of conversion result ≤ 1 LSB
ADC10SR = 0
ADC10SR = 1
400
ns
2000
CVREF+
Capacitance at pin VREF+
(see Note 1)
REFON =1, IVREF+ ≤ ±1 mA
2.2 V/3 V
100 pF
TREF+†
Temperature coefficient of
built-in reference
IVREF+ is a constant in the range of
0 mA ≤ IVREF+ ≤ 1 mA
2.2 V/3 V
±100 ppm/°C
tREFON†
Settle time of internal
reference voltage and
VREF+
(see Note 2)
IVREF+ = 0.5 mA,VREF+ = 1.5 V, VCC = 3.6 V,
REFON = 0 → 1
IVREF+ = 0.5 mA, VREF+ = 1.5 V,
VCC = 2.2 V, REFON = 1
ADC10SR = 0
ADC10SR = 1
30
0.8 ^µs
2.5
† _{Not production tested, limits characterized}
‡ _{Not production tested, limits verified by design}
NOTES: 1. The capacitance applied to the internal buffer operational amplifier, if switched to terminal P2.4/TA2/A4/VREF+/VeREF+ (REFOUT=1),
must be limited; the reference buffer may become unstable otherwise.
NOTES: 2. The condition is that the error in a conversion started after tREFON is less than ±0.5 LSB.
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