MSP430F563X Datasheet, PDF (60/101 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F563x
SLAS650A – JUNE 2010 – REVISED JULY 2010
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REF, Built-In Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)⁽¹⁾
PARAMETER
V_REF+
Positive built-in reference
voltage output
AV_CC(min)
AV_CC minimum voltage,
Positive built-in reference
active
TEST CONDITIONS
REFVSEL = {2} for 2.5 V
REFON = REFOUT = 1
I_VREF+ = 0 A
REFVSEL = {1} for 2 V
REFON = REFOUT = 1
I_VREF+ = 0 A
REFVSEL = {0} for 1.5 V
REFON = REFOUT = 1
I_VREF+ = 0 A
REFVSEL = {0} for 1.5 V
REFVSEL = {1} for 2 V
REFVSEL = {2} for 2.5 V
V_CC
MIN TYP
3V
2.5
3V
2.0
2.2 V / 3 V
1.5
2.2
2.3
2.8
I_REF+
Operating supply current into
AV_CC terminal ^{(2) (3)}
f_ADC12CLK = 5 MHz,
REFON = 1, REFOUT = 0, REFBURST = 0
f_ADC12CLK = 5 MHz,
REFON = 1, REFOUT = 1, REFBURST = 0
3V
3V
I_L(VREF+)
C_VREF+
TC_REF+
Load-current regulation,
V_REF+ terminal⁽⁴⁾
Capacitance at V_REF+
terminal
Temperature coefficient of
built-in reference⁽⁶⁾
REFVSEL = {0, 1, 2}
I_VREF+ = +10 µA / -1000 µA
AV_CC = AV_CC(min) for each reference level.
REFVSEL = {0, 1, 2}, REFON = REFOUT = 1
REFON = REFOUT = 1, ⁽⁵⁾
0 mA ≤ I_VREF+ ≤ I_VREF+(max)
I_VREF+ is a constant in the range of
0 mA ≤ I_VREF+ ≤ –1 mA
REROUT = 0
2.2 V/3 V
2.2 V/3 V
20
TBD
PSRR_DC
Power Supply Rejection Ratio
(DC)
AV_CC = AV_CC(min) - AV_CC(max)
T_A = 25°C
REFVSEL = {0, 1, 2}, REFON = 1, REFOUT =
0 or 1
TBD
PSRR_AC
Power Supply Rejection Ratio
(AC)
AV_CC = AV_CC(min) - AV_CC(max)
T_A = 25°C
REFVSEL = {0, 1, 2}, REFON = 1, REFOUT =
0 or 1
TBD
AV_CC = AV_CC(min) - AV_CC(max)
REFVSEL = {0, 1, 2}, REFOUT = 0, REFON =
75
0→1
t_SETTLE
Settling time of reference
voltage ⁽⁷⁾
AV_CC = AV_CC(min) - AV_CC(max)
C_VREF = C_VREF(max)
REFVSEL = {0, 1, 2}, REFOUT = 1, REFON =
75
0→1
MAX UNIT
±1%
±1% V
±1%
V
TBD
µA
TBD
TBD µV/mA
100 pF
TBD
ppm/
°C
TBD µV/V
mV/V
µs
(1) The reference is supplied to the ADC by the REF module and is buffered locally inside the ADC. The ADC uses two internal buffers, one
smaller and one larger for driving the V_REF+ terminal. When REFOUT = 1, the reference is available at the V_REF+ terminal, as well as,
used as the reference for the conversion and utilizes the larger buffer. When REFOUT = 0, the reference is only used as the reference
for the conversion and utilizes the smaller buffer.
(2) The internal reference current is supplied via terminal AV_CC. Consumption is independent of the ADC12ON control bit, unless a
conversion is active. REFOUT = 0 represents the current contribution of the smaller buffer. REFOUT = 1 represents the current
contribution of the larger buffer without external load.
(3) The temperature sensor is provided by the REF module. Its current is supplied via terminal AV_CC and is equivalent to I_REF+ with REFON
= 1 and REFOUT = 0.
(4) Contribution only due to the reference and buffer including package. This does not include resistance due to PCB trace, etc.
(5) Two decoupling capacitors, 10µF and 100nF, should be connected to VREF to decouple the dynamic current required for an external
reference source if it is used for the ADC12_A. See also the MSP430x5xx Family User's Guide (SLAU208).
(6) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C)/(85°C – (–40°C)).
(7) The condition is that the error in a conversion started after t_REFON is less than ±0.5 LSB. The settling time depends on the external
capacitive load when REFOUT = 1.
60
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