MSP430G2955
MSP430G2855
MSP430G2755
www.ti.com
SLAS800 –MARCH 2013
10-Bit ADC, Built-In Voltage Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VREF+ ≤ 1 mA, REF2_5V = 0
VCC
MIN
2.2
TYP
MAX UNIT
I
I
I
I
Positive built-in reference
analog supply voltage range
VCC,REF+
V
VREF+ ≤ 1 mA, REF2_5V = 1
2.9
VREF+ ≤ IVREF+max, REF2_5V = 0
VREF+ ≤ IVREF+max, REF2_5V = 1
1.41
2.35
1.5
2.5
1.59
V
Positive built-in reference
voltage
VREF+
3 V
3 V
2.65
Maximum VREF+ load
current
ILD,VREF+
±1
±2
mA
IVREF+ = 500 µA ± 100 µA,
Analog input voltage VAx ≈ 0.75 V,
REF2_5V = 0
VREF+ load regulation
3 V
3 V
LSB
IVREF+ = 500 µA ± 100 µA,
Analog input voltage VAx ≈ 1.25 V,
REF2_5V = 1
±2
IVREF+ = 100 µA→900 µA,
VAx ≈ 0.5 × VREF+,
Error of conversion result ≤ 1 LSB,
VREF+ load regulation
response time
400
ns
ADC10SR = 0
Maximum capacitance at
VREF+ pin
CVREF+
TCREF+
I
VREF+ ≤ ±1 mA, REFON = 1, REFOUT = 1
3 V
3 V
100
pF
ppm/
°C
Temperature coefficient(1)
IVREF+ = const with 0 mA ≤ IVREF+ ≤ 1 mA
±100
Settling time of internal
reference voltage to 99.9%
VREF
IVREF+ = 0.5 mA, REF2_5V = 0,
REFON = 0 → 1
tREFON
3.6 V
3 V
30
2
µs
µs
IVREF+ = 0.5 mA,
REF2_5V = 1, REFON = 1,
REFBURST = 1, ADC10SR = 0
Settling time of reference
buffer to 99.9% VREF
tREFBURST
(1) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C) / (85°C – (–40°C))
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