Datasheet

MSP430F21x2
SLAS578J –NOVEMBER 2007– REVISED JANUARY 2012 www.ti.com
Comparator_A+
(1)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
2.2 V 25 40
I
(DD)
CAON = 1, CARSEL = 0, CAREF = 0 µA
3 V 45 60
2.2 V 30 50
CAON = 1, CARSEL = 0, CAREF = 1/2/3,
I
(Refladder/RefDiode)
µA
No load at P1.0/CA0 and P1.1/CA1
3 V 45 71
Common-mode input voltage
V
IC
CAON = 1 2.2 V/3 V 0 V
CC
- 1 V
range
Voltage at 0.25 V
CC
node / PCA0 = 1, CARSEL = 1, CAREF = 1,
V
(Ref025)
2.2 V/3 V 0.23 0.24 0.25
V
CC
No load at P1.0/CA0 and P1.1/CA1
Voltage at 0.5 V
CC
node / PCA0 = 1, CARSEL = 1, CAREF = 2,
V
(Ref050)
2.2 V/3 V 0.47 0.48 0.5
V
CC
No load at P1.0/CA0 and P1.1/CA1
PCA0 = 1, CARSEL = 1, CAREF = 3, 2.2 V 390 480 540
V
(RefVT)
See Figure 28 and Figure 29 No load at P1.0/CA0 and P1.1/CA1; mV
3 V 400 490 550
T
A
= 85°C
V
(offset)
Offset voltage
(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, 2.2 V 80 165 300
Without filter: CAF = 0
(3)
ns
3 V 70 120 240
(see Figure 25 and Figure 26)
Response time
t
(response)
(low-high and high-low)
T
A
= 25°C, Overdrive 10 mV, 2.2 V 1.4 1.9 2.8
With filter: CAF = 1
(3)
µs
3 V 0.9 1.5 2.2
(see Figure 25 and Figure 26)
(1) The leakage current for the Comparator_A+ terminals is identical to I
lkg(Px.y)
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 P2.2/TA0.0/A2/CA4/CAOUT. If the Comparator_A+ is enabled a settling time of 60 ns (typical) is added to
the response time.
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