MSP430F249-EP_014 Datasheet, PDF (52/81 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F249-EP
MIXED SIGNAL MICROCONTROLLER
2008
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
Comparator_A+ (see Note 1)
PARAMETER
I_(DD)
I_{(Refladder/Refdiode)}
V_(IC)
Common-mode input
voltage
TEST CONDITIONS
CAON = 1, CARSEL = 0, CAREF = 0
CAON = 1, CARSEL = 0,
CAREF = 1/2/3, no load at
P2.3/CA0/TA1 and P2.4/CA1/TA2
VCC
2.2 V
3V
2.2 V
3V
CAON = 1
2.2 V/3 V
MIN TYP
25
45
30
45
MAX
40
60
50
71
UNIT
μA
μA
0
V_CC−1 V
V_(Ref025)
V_(Ref050)
PCA0 = 1, CARSEL = 1, CAREF = 1,
Voltage @ 0.25 VCC node _{no load at P2.3/CA0/TA1 and}
2.2 V/3 V 0.23 0.24 0.25
VCC
P2.4/CA1/TA2
Voltage @ 0.5VCC node
PCA0 = 1, CARSEL = 1, CAREF = 2,
no load at P2.3/CA0/TA1 and
2.2 V/3 V
.47 0.48
0.5
VCC
P2.4/CA1/TA2
V_(RefVT)
V_(offset)
V_hys
(see Figure 35 and Figure 36)
Offset voltage
Input hysteresis
PCA0 = 1, CARSEL = 1, CAREF = 3,
no load at P2.3/CA0/TA1 and
P2.4/CA1/TA2 T_A = 85°C
See Note 2
CAON = 1
2.2 V
3V
2.2 V/3 V
2.2 V/3 V
390 480
400 490
−30
0 0.7
540
mV
550
30 mV
1.4 mV
t_(response)
Low to high and high to low
(see Note 3)
T_A = 25°C, Overdrive 10 mV,
Without filter: CAF=0
T_A = 25°C, Overdrive 10 mV,
With filter: CAF = 1
2.2 V
3V
2.2 V
3V
80 165
70 120
1.4 1.9
0.9 1.5
300
ns
270
2.8
μs
2.2
NOTES:
1. The leakage current for the Comparator_A terminals is identical to I_lkg(Px.x) specification.
2. The input offset voltage can be cancelled by using the CAEX bit to invert the Comparator_A inputs on successive measurements.
The two successive measurements are then summed together.
3. The response time is measured at P2.2/CAOUT/TA0/CA4 with an input voltage step, with Comparator_A+ already enabled
(CAON = 1). If CAON is set at the same time, a settling time of up to 300 ns is added to the response time.
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