MSP430F532X Datasheet, PDF (65/106 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F532x
www.ti.com
SLAS678D – AUGUST 2010 – REVISED FEBRUARY 2013
REF, Built-In Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)⁽¹⁾
V_REF+
AV_CC(min)
I_REF+
PARAMETER
Positive built-in reference
voltage output
AVCC minimum voltage,
Positive built-in reference
active
Operating supply current into
AVCC terminal^{(2) (3)}
TEST CONDITIONS
REFVSEL = {2} for 2.5 V,
REFON = REFOUT = 1, I_VREF+= 0 A
REFVSEL = {1} for 2.0 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 2.0 V
REFVSEL = {2} for 2.5 V
ADC12SR = 1⁽⁴⁾, REFON = 1, REFOUT = 0,
REFBURST = 0
ADC12SR = 1⁽⁴⁾, REFON = 1, REFOUT = 1,
REFBURST = 0
ADC12SR = 0⁽⁴⁾, REFON = 1, REFOUT = 0,
REFBURST = 0
ADC12SR = 0⁽⁴⁾, REFON = 1, REFOUT = 1,
REFBURST = 0
V_CC
MIN TYP MAX UNIT
3 V 2.4625 2.50 2.5375
3 V 1.9503 1.98 2.0097 V
2.2 V, 3 V 1.4677
2.2
2.3
2.8
3V
1.49 1.5124
V
70 100 µA
3V
0.45 0.75 mA
3V
210 310 µA
3V
0.95 1.7 mA
I_L(VREF+)
Load-current regulation,
VREF+ terminal⁽⁵⁾
REFVSEL = (0, 1, 2},
I_VREF+ = +10 µA/–1000 µA,
AVCC = AVCC(min) for each reference level,
REFVSEL = (0, 1, 2}, REFON = REFOUT = 1
2500 µV/mA
C_VREF+
Capacitance at VREF+
terminals
REFON = REFOUT = 1
20
100 pF
TC_REF+
Temperature coefficient of
built-in reference⁽⁶⁾
I_VREF+ = 0 A,
REFVSEL = (0, 1, 2}, REFON = 1,
REFOUT = 0 or 1
30
50
ppm/
°C
PSRR_DC
Power supply rejection ratio
(DC)
AVCC = AVCC(min) - AVCC(max),
T_A = 25°C, REFVSEL = (0, 1, 2}, REFON = 1,
REFOUT = 0 or 1
120 300 µV/V
PSRR_AC
Power supply rejection ratio
(AC)
AVCC = AVCC(min) - AVCC(max),
T_A = 25°C, f = 1 kHz, ΔVpp = 100 mV,
REFVSEL = (0, 1, 2}, REFON = 1,
REFOUT = 0 or 1
6.4
mV/V
t_SETTLE
Settling time of reference
voltage ⁽⁷⁾
AVCC = AVCC(min) - AVCC(max),
REFVSEL = (0, 1, 2}, REFOUT = 0,
REFON = 0 → 1
AVCC = AVCC(min) - AVCC(max),
C_VREF = C_VREF(max),
REFVSEL = (0, 1, 2}, REFOUT = 1,
REFON = 0 → 1
75
µs
75
(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 AVCC. 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) For devices without the ADC12, the parametric with ADC12SR = 0 are applicable.
(5) Contribution only due to the reference and buffer including package. This does not include resistance due to PCB trace, etc.
(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.
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