MSP430G2X31 Datasheet, PDF (28/52 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430G2x31
MSP430G2x21
SLAS694C – FEBRUARY 2010 – REVISED JULY 2010
www.ti.com
10-Bit ADC, Built-In Voltage Reference – MSP430G2x31 Only
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_CC,REF+
V_REF+
I_LD,VREF+
PARAMETER
TEST CONDITIONS
Positive built-in reference ^IVREF+ ^{≤ 1 mA, REF2_5V = 0}
analog supply voltage range _{IVREF+ ≤ 1 mA, REF2_5V = 1}
Positive built-in reference
voltage
I_VREF+ ≤ I_VREF+max, REF2_5V = 0
I_VREF+ ≤ I_VREF+max, REF2_5V = 1
Maximum VREF+ load
current
V_CC
MIN TYP
2.2
2.9
1.41 1.5
3V
2.35 2.5
3V
I_VREF+ = 500 µA ± 100 µA,
Analog input voltage V_Ax ≉ 0.75 V,
REF2_5V = 0
VREF+ load regulation
3V
I_VREF+ = 500 µA ± 100 µA,
Analog input voltage V_Ax ≉ 1.25 V,
REF2_5V = 1
I_VREF+ = 100 µA→900 µA,
V_REF+ load regulation
response time
V_Ax ≉ 0.5 × VREF+,
Error of conversion result ≤ 1 LSB,
3V
ADC10SR = 0
C_VREF+
Maximum capacitance at
pin VREF+
I_VREF+ ≤ ±1 mA, REFON = 1, REFOUT = 1
3V
TC_REF+
t_REFON
t_REFBURST
Temperature coefficient
I_VREF+ = const with 0 mA ≤ I_VREF+ ≤ 1 mA
Settling time of internal
reference voltage to 99.9%
VREF
Settling time of reference
buffer to 99.9% VREF
I_VREF+ = 0.5 mA, REF2_5V = 0,
REFON = 0 → 1
I_VREF+ = 0.5 mA,
REF2_5V = 1, REFON = 1,
REFBURST = 1, ADC10SR = 0
3V
3.6 V
3V
MAX UNIT
V
1.59
V
2.65
±1 mA
±2
LSB
±2
400 ns
100 pF
±100
ppm/
°C
30 µs
2 µs
28
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