Datasheet

MSP430FG43x
MIXED SIGNAL MICROCONTROLLER
SLAS380C − APRIL 2004 − REVISED MARCH 2011
45
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted)
R
O/P(OAx)
Max
0.2V
AV
CC
AV
CC
−0.2V
V
OUT
Min
R
Load
AV
CC
C
Load
2
I
Load
OAx
O/P(OAx)
Figure 29. OAx Output Resistance Tests
operational amplifier OA, dynamic specifications
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
Fast Mode — 1.2
SR Slew rate
Medium Mode — 0.8
V/μs
SR
Slew
rate
Slow Mode — 0.3
V/μs
Open-loop voltage gain — 100 dB
φ
m
Phase margin C
L
= 50 pF — 60 deg
Gain margin C
L
= 50 pF — 20 dB
Non inverting Fast Mode R 47kΩ C 50pF
2 2 V/3 V
22
Gain
-
Bandwidth Product
Non−inverting, Fast Mode, R
L
= 47kΩ, C
L
= 50pF 2.2 V/3 V 2.2
GBW
Gain
-
Bandwidth
Product
(see Figure 30
Non inverting Medium Mode R 300kΩ C 50pF
2 2 V/3 V
14
MHz
GBW
(see Figure 30
Non−inverting, Medium Mode, R
L
=300kΩ, C
L
= 50pF 2.2 V/3 V 1.4 MHz
GBW
(see
Figure
30
a
n
d
Fi
gu
r
e
3
1
)
Non inverting Slow Mode R 300kΩ C 50pF
2 2 V/3 V
05
MHz
and
Figure
31)
Non−inverting, Slow Mode, R
L
=300kΩ, C
L
= 50pF 2.2 V/3 V 0.5
t
en(on)
Enable time on t
on
, non-inverting, Gain = 1 2.2 V/3 V 10 20 μs
t
en(off)
Enable time off 2.2 V/3 V 1 μs
Figure 30
Input Frequency − kHz
−80
−60
−40
−20
0
20
40
60
80
100
120
140
TYPICAL OPEN-LOOP GAIN vs FREQUENCY
Slow Mode
Fast Mode
Gain − dB
Medium Mode
0.001 0.01 0.1 1 10 100 1000 10000
Figure 31
Input Frequency − kHz
−250
−200
−150
−100
−50
0
1 10 100 1000 10000
TYPICAL PHASE vs FREQUENCY
Phase − degrees
Slow Mode
Fast Mode
Medium Mode