Datasheet

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SLAS491A − AUGUST 2005 − REVISED OCTOBER 2005
35
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MSP430x20x1 electrical characteristics over recommended ranges of supply voltage and
operating free-air temperature (unless otherwise noted)
Comparator_A+ (see Note 1, MSP430x20x1 only)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
I
(DD)
CAON=1, CARSEL=0, CAREF=0
2.2 V 25 40
µA
I
(DD)
CAON=1, CARSEL=0, CAREF=0
3 V 45 60
µ
A
I
(Refladder/RefDiode)
CAON=1, CARSEL=0,
CAREF=1/2/3,
2.2 V 30 50
µA
I
(Refladder/RefDiode)
CAREF=1/2/3,
no load at P1.0/CA0 and P1.1/CA1
3 V 45 71
µ
A
V
(IC)
Common-mode input
voltage
CAON=1 2.2 V/3 V 0 V
CC
−1 V
V
(Ref025)
Voltage @ 0.25 V
CC
node
V
CC
PCA0=1, CARSEL=1, CAREF=1,
no load at P1.0/CA0 and P1.1/CA1
2.2 V/3 V 0.23 0.24 0.25
V
(Ref050)
Voltage @ 0.5V
CC
node
V
CC
PCA0=1, CARSEL=1, CAREF=2,
no load at P1.0/CA0 and P1.1/CA1
2.2 V/3 V 0.47 0.48 0.5
V
(RefVT)
(see Figure 19 and Figure 20)
PCA0=1, CARSEL=1, CAREF=3,
no load at P1.0/CA0 and P1.1/CA1,
2.2 V 390 480 540
mV
V
(RefVT)
(see Figure 19 and Figure 20)
no load at P1.0/CA0 and P1.1/CA1,
T
A
= 85°C
3 V 400 490 550
mV
V
(offset)
Offset voltage See Note 2 2.2 V/3 V −30 30 mV
V
hys
Input hysteresis CAON=1 2.2 V/3 V 0 0.7 1.4 mV
T
A
= 25°C, Overdrive 10 mV,
Without filter: CAF=0
2.2 V 80 165 300
ns
t
(response)
Response time
Without filter: CAF=0
(see Note 3, Figure 16 and
Figure 17)
3 V 70 120 240
ns
t
(response)
Response time
(low−high and high−low)
T
A
= 25°C, Overdrive 10 mV,
With filter: CAF=1
2.2 V 1.4 1.9 2.8
µs
With filter: CAF=1
(see Note 3, Figure 16 and
Figure 17)
3 V 0.9 1.5 2.2
µ
s
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. Response time measured at P1.3/CAOUT.