MSP432P401R_16 Datasheet, PDF (68/200 Pages) Texas Instruments – Mixed-Signal Microcontrollers

MSP432P401R, MSP432P401M
SLAS826E – MARCH 2015 – REVISED JULY 2016
www.ti.com
Table 5-31 lists the characteristics of the internal reference buffers of the ADC.
Table 5-31. 14-Bit ADC, Internal Reference Buffers
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
ADC ON, REFOUT = 0, ADC14PWRMD = 0,
REFVSEL = {0, 1, 3}
V_CC
MIN TYP
600
I_REF+
Operating supply current into
AVCC terminal⁽¹⁾
ADC ON, REFOUT = 0, ADC14PWRMD = 2,
REFVSEL = {0, 1, 3}
3V
200
ADC ON, REFOUT = 1, ADC14PWRMD = 2,
REFVSEL = {0, 1, 3}
650
t_on
Turnon time
3V
(1) The internal reference current is supplied through terminal AVCC.
Table 5-32 lists the characteristics of the ADC external reference.
MAX UNIT
800
300 µA
850
5
µs
Table 5-32. 14-Bit ADC, External Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
V_eREF+
Positive external reference voltage
input ⁽¹⁾
1.45
AV_CC
V
V_eREF-
Negative external reference voltage
input
0V
(V_eREF+ -
V_eREF-)
I_VeREF+
I_VeREF-
Differential external reference voltage
input ⁽¹⁾
Static input current in single-ended
input mode
1.45 V ≤ V_eREF+≤ V_AVCC, V_eREF- = 0 V,
f_ADC14CLK = 25 MHz, ADC14SHT0x = 0x1,
ADC14SHT1x = 0x1, ADC14DIF = 0
1.45 V ≤ V_eREF+≤ V_AVCC, V_eREF- = 0 V,
f_ADC14CLK = 5 MHz, ADC14SHT0x = 0x1,
ADC14SHT1x = 0x1, ADC14DIF = 0
1.45
AV_CC
V
±75
µA
±15
I_VeREF+
I_VeREF-
Static input current in differential input
mode
1.45 V ≤ V_eREF+≤ V_AVCC, V_eREF- = 0 V,
f_ADC14CLK = 25 MHz, ADC14SHT0x = 0x1,
ADC14SHT1x = 0x1, ADC14DIF = 1
1.45 V ≤ V_eREF+≤ V_AVCC, V_eREF- = 0 V
f_ADC14CLK = 5 MHz, ADC14SHT0x = 0x1,
ADC14SHT1x = 0x1, ADC14DIF = 1
C_VeREF+
Capacitance at VeREF+ terminal
See ⁽²⁾
5
±150
µA
±30
µF
(1) Lower reference voltage down to 1.2 V can be applied for 1 Msps sampling rate with reduced accuracy requirements of linearity
parameters.
(2) Two decoupling capacitors, 5 µF and 50 nF, should be connected to VeREF+ terminal to decouple the dynamic current required for an
external reference source if it is used for the ADC14. See also the MSP432P4xx Family Technical Reference Manual.
68
Specifications
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