MSP430F551X_1 Datasheet, PDF (73/115 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F551x
MSP430F552x
www.ti.com
SLAS590D – OCTOBER 2009 – REVISED APRIL 2010
REF, Built-In Reference (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)⁽¹⁾
PARAMETER
I_L(VREF+)
Load-current regulation,
V_REF+ terminal⁽⁴⁾
TEST CONDITIONS
V_CC
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
MIN TYP
C_VREF+/-
Capacitance at VREF+/-
terminals
REFON = REFOUT = 1⁽⁵⁾
20
TC_REF+
Temperature coefficient of
built-in reference⁽⁶⁾
I_VREF+ = 0 A
REFVSEL = (0, 1, 2}, REFON = 1,
REFOUT = 0 or 1
30
AV_CC = AV_{CC (min)} - AV_CC(max)
PSRR_DC
Power supply rejection ratio
(DC)
T_A = 25°C
REFVSEL = (0, 1, 2}, REFON = 1,
120
REFOUT = 0 or 1
AV_CC = AV_{CC (min)} - AV_CC(max)
PSRR_AC
Power supply rejection ratio
(AC)
T_A = 25°C
f = 1 kHz, ΔVpp = 100 mV
REFVSEL = (0, 1, 2}, REFON = 1,
6.4
REFOUT = 0 or 1
AV_CC = AV_{CC (min)} - AV_CC(max)
REFVSEL = (0, 1, 2}, REFOUT = 0,
75
REFON = 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,
75
REFON = 0 → 1
MAX UNIT
2500 µV/mA
100 pF
50
ppm/°
C
300 µV/V
mV/V
µs
(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.
Comparator B
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
V_CC
Supply voltage
TEST CONDITIONS
V_CC
1.8 V
MIN TYP MAX UNIT
1.8
3.6 V
40
I_{AVCC_COMP}
Comparator operating supply
current into AV_CC. Excludes
reference resistor ladder.
CBPWRMD = 00
CBPWRMD = 01
2.2 V
3.0 V
2.2/3.0 V
30
50
40
65 µA
10
30
CBPWRMD = 10
2.2/3.0 V
0.1 0.5
I_{AVCC_REF}
V_IC
V_OFFSET
Quiescent current of local
reference voltage amplifier into
AV_CC.
Common mode input range
Input offset voltage
CBREFACC = 1, CBREFLx = 01
CBPWRMD = 00
CBPWRMD = 01, 10
22 µA
0
V_CC-1 V
±20 mV
±10 mV
C_IN
R_SIN
Input capacitance
Series input resistance
ON - switch closed
OFF - switch opened
5
pF
3
4 kΩ
30
MΩ
CBPWRMD = 00, CBF = 0
450 ns
t_PD
Propagation delay, response time CBPWRMD = 01, CBF = 0
CBPWRMD = 10, CBF = 0
600 ns
50 µs
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