Datasheet

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MSP432P401R, MSP432P401M
www.ti.com SLAS826 –MARCH 2015
5.10.7 REF_A
Table 5-43. REF_A, Built-In Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
REFVSEL = {0} for 1.2 V
1.62 V 1.2 ±1%
REFON = 1
REFVSEL = {1} for 1.45 V
1.75 V 1.45 ±1%
REFON = 1
Positive built-in reference
V
REF+
V
voltage output
REFVSEL = {2} for 2.0 V
2.3 V 2.0 ±1%
REFON = 1
REFVSEL = {3} for 2.5 V
2.8 V 2.5 ±1%
REFON = 1
REFVSEL = {0} for 1.2 V 1.62
AVCC minimum voltage,
REFVSEL = {1} for 1.45 V 1.75
AV
CC(min)
Positive built-in reference V
REFVSEL = {2} for 2.0 V 2.3
active
REFVSEL = {3} for 2.5 V 2.8
Operating supply current into
I
REF+
REFON = 1 3 V 12 20 µA
AVCC terminal
(1)
REFVSEL = {0, 1, 2, 3}, I(VREF+) = +10
Load-current regulation, µA/–1000 µA,
I
L(VREF+)
2500 µV/mA
VREF+ terminal AVCC = AVCC(min) for each reference level,
REFON = REFOUT = 1
Capacitance at VREF+,
C
VREF±
REFON = REFOUT = 1 0 100 pF
VREF- terminals
AVCC = AVCC(min) for each reference level,
PSRR_DC Power supply rejection ratio
REFVSEL = {0,1,2, 3}, REFON = 1, 120 300 µV/V
REFOUT0
(DC) after ADC buffer
REFOUT = 0
AVCC = AVCC(min) for each reference level,
PSRR_DC Power supply rejection ratio
REFVSEL = {0,1,2, 3}, REFON = 1, 50 100 µV/V
REFOUT1
(DC) after ADC buffer
REFOUT = 1
AVCC = AVCC(min) for each reference level,
PSRR_AC Power supply rejection ratio dAVCC = 0.1V at 1 kHz,
6.4 10 mV/V
REFOUT0
(AC) after ADC buffer REFVSEL = {0,1,2, 3}, REFON = 1,
REFOUT = 0
AVCC = AVCC(min) for each reference level,
PSRR_AC Power supply rejection ratio dAVCC = 0.1V at 1 kHz,
2 5 mV/V
REFOUT1
(AC) after ADC buffer REFVSEL = {0,1,2, 3}, REFON = 1,
REFOUT = 1
Temperature coefficient of REFVSEL = {0, 1, 2, 3}, REFON = 1, T
A
= ppm/°
TC
REF+
(2)
<10 20
built-in reference –40°C to 85°C C
Temperature coefficient of REFVSEL = {0, 1, 2, 3}, REFON = 1, T
A
= 0°C ppm/°
TC
REF+
(2)
<5 15
built-in reference to 50°C C
Settling time of reference AV
CC
= AV
CC (min)
- AV
CC(max)
t
SETTLE
75 90 µs
voltage
(3)
REFVSEL = {0, 1, 2, 3}, REFON = 0 → 1
(1) The internal reference current is supplied from terminal AVCC.
(2) Calculated using the box method: (MAX(–40°C to 85°C) – MIN(–40°C to 85°C)) / MIN(–40°C to 85°C)/(85°C – (–40°C)).
(3) The condition is that the error in a ADC conversion started after t
SETTLE
is less than ±0.5 LSB.
Copyright © 2015, Texas Instruments Incorporated Specifications 49
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